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Description
Title of Invention
INPUT/OUTPUT APPARATUS
5
Technical Field
[0001]
The present disclosure relates to an input/output apparatus obtained by
extending the function of an input/output terminal used for input/output of an
10 information terminal device.
Background Art
[0002]
To receive TV broadcasting by an information terminal device such as a
15 mobile phone, one of the method of providing a dedicated receiving antenna inside
the information terminal device and the method of capturing antenna input from an
earphone terminal to listen to an audio signal is generally used.
[0003]
In addition, TV sets can now be easily moved through the miniaturization
20 thereof and there is also a desire to receive TV broadcasting in a room in which there
is no antenna receptacle for TV broadcasting such as a kitchen in the home. In such
a case, using a power transmission cable as an antenna for TV broadcasting is
proposed (see, for example, Patent Literature 1).
[0004]
25 According to the technology described in Patent Literature 1, the distance
between an inductor for high-frequency cutoff provided on the side of a power
supply circuit of a power transmission cable and an inductor for high-frequency
cutoff provided on the side of a mobile terminal is set to an integral multiple of the
1/4 wavelength of the carrier frequency of received TV broadcasting or the like.
30 Accordingly, TV broadcasting or the like in a wide frequency band can be received.
[00Q5]
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Also, a receiving apparatus capable of obtaining sufficient antenna
characteristics even if a connector is shared when a cable used as an antenna is
caused to transmit another signal whose frequency overlaps is proposed by the
present inventors (see Patent Literature 2).
5
Citation List
Patent Literature
[0006]
Patent Literature 1: JP 2010-157991A
10 Patent Literature 2: JP 2010-219904A
Summary of Invention
Technical Problem
[0007]
15 However, a conventional earphone antenna or an antenna using a power
transmission cable needs a special cord or cable for the antenna and there arises a
problem that, for example, it is difficult to use the antenna also for other signal
transmission. In addition, providing a special antenna inside an information
terminal device constitutes an obstacle to slimming down and miniaturization of the
20 information terminal device.
[0008]
The present disclosure is developed in view of the above problems and an
object thereof is to provide an input/output apparatus capable of receiving a radio
wave of an FM radio or television via a cable connected to an input/output terminal
25 of an information processing terminal device.
Solution to Problem
[0009]
To solve the above problems, an input/output apparatus according to the
30 present disclosure uses, among information terminals of an input/output connector
provided in an information terminal device, at least one information terminal of the
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information terminals in which content of information thereof is discriminated based
on a potential of an input information signal is also used as an antenna input terminal.
At least the one information terminal is preferably an information terminal
used to discriminate a connected device and an ID terminal corresponds to the
5 information terminal when the input/output connector is a USB connector.
[0010]
An antenna signal input into the antenna input terminal is a broadcast wave
signal of one of an FM band, a VHF band, and a UHF band or a plurality of these
bands and a capacitor allowing frequencies of the plurality of these bands to pass is
10 connected to a line (for example, an ID line) to which at least one information
terminal is connected. In addition, a high-frequency cutoff element having high
impedance for the frequency in the bands is connected in parallel with the capacitor
to the line to which at least the one information terminal is connected.
[0011]
15 Further, in an input/output apparatus according to the present disclosure,
good pass characteristics up to the GHz band beyond the UHF band of a television
signal can be obtained by devising the arrangement of terminals to which each pin on
a substrate of a USB connector is connected.
20 Advantageous Effects of Invention
[0012]
According to an input/output apparatus in the present disclosure, there is no
need to provide a space of a new connector for an antenna on the side of an
information terminal device and therefore, further slimming down and
25 miniaturization of the information terminal device can be realized. In addition, an
operation effect of being able to pass signals of a wide band ranging from the MHz
band to the GHz band is confirmed.
Brief Description of Drawings
30 [0013]
[FIG. 1] FIG. 1 is a diagram showing an overview of an embodiment of an
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input/output apparatus according to the present disclosure.
[FIGS. 2(A) to 2(D)] FIGS. 2(A) to 2(D) are diagrams showing examples of a USBSMA
conversion cable having a USB connector connected to one end thereof and an
SMA connector connected to the other end thereof.
5 [FIG. 3] FIG. 3 is a diagram showing that frequency characteristics of samples (five)
of the USB-SMA conversion cable shown in FIGS. 2(A) to 2(D) yielded
substantially the same results.
[FIG. 4] FIG. 4 is a diagram showing an eye pattern obtained by performing a
transmission test of a differential signal of USB 2.0 using the USB-SMA conversion
10 cable shown in FIGS. 2(A) to 2(D).
[FIG. 5] FIG. 5 is a conceptual diagram showing another embodiment in which both
of a coaxial cable and a USB cable to connect to an external antenna unit are
connected to the input/output apparatus according to the present disclosure.
[FIG. 6] FIG. 6 is a diagram showing concrete connecting relations when both the
15 coaxial cable and the USB cable in FIG. 5 are connected to a USB input/output
apparatus.
[FIG. 7] FIG. 7 is a diagram showing an example of an earphone antenna produced
by connecting the USB cable and an earphone cord.
[FIG. 8] FIG. 8 is a diagram showing a concrete connection configuration of the
20 earphone antenna in FIG. 7.
[FIGS. 9(A) and 9(B)] FIGS. 9(A) and 9(B) are diagrams showing measured
frequency-gain (peak gain) characteristics of the earphone antenna in FIG. 7.
[FIGS. 10(A) to 10(C)] FIGS. 10(A) to 10(C) are diagrams showing substrate
structures to obtain pass characteristics in the GHz band by the input/output
25 apparatus according to the present disclosure.
[FIG. 11] FIG. 11 is a diagram showing frequency characteristics of the sample (one)
of the USB-SMA conversion cable when the substrate structure shown in FIGS.
10(A) to 10(C) is adopted.
[FIG. 12] FIG. 12 is a diagram showing relations of signal terminals when the USB
30 connector and an MHL connector are shared in the input/output apparatus according
to the present disclosure.
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Description of Embodiments
[0014]
With further slimming down and miniaturization of recent information
5 terminal devices, it is becoming more difficult to secure a space to provide an
antenna needed to receive a radio wave of TV broadcasting on the side of the
information terminal device or a special connector connected to an external antenna.
For example, many earphone antennas have been proposed by inventors and the like
as an antenna to receive a radio wave of TV broadcasting. However, the size of
10 diameter of a terminal for earphone needed for the earphone antenna is also an
obstacle to further slim down the information terminal device.
[0015]
Thus, many thin information terminal devices in recent years are provided
with only a USB (Universal Serial Bus) terminal without having any earphone
15 terminal. Such information terminal devices are charged from a host computer and
various signals are transmitted between the host computer and the information
terminal devices by using the USB terminal.
[0016]
To solve the above problems, the inventors considered using the USB
20 terminal always mounted on an information terminal device so as to be able to
receive TV broadcasting. Then, the inventors tried various ideas and experiments.
As a result, the inventors contrived an input/output apparatus capable of receiving a
radio wave of TV broadcasting or the like without providing a terminal for earphone
or a special connector for an external antenna.
25 [0017]
Hereinafter, an embodiment disclosed herein (hereinafter, called the
"present example") will be described with reference to FIGS. 1 to 7 and the
description will be provided in the following order. Though an input/output
apparatus using the USB terminal will be described below, the present disclosure is
30 not limited to the USB input/output apparatus.
1. Connection verification of a USB-SMA conversion cable to an external
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antenna
2. Concrete example of the USB-SMA conversion cable
3. Verification of maintenance of a USB function
4. Connection example of a coaxial cable and a USB cable
5 5. Application example to an earphone antenna
6. Substrate structure of a USB input/output apparatus to obtain pass
characteristics in the GHz band
[0018]
<1. Connection verification of a USB-SMA conversion cable to an external
10 antenna>
FIG. 1 is a diagram showing an example of an input/output apparatus of the
present example. As shown in FIG. 1, a female USB connector for USB cable
connection is provided on the side of an information terminal device (hereinafter,
also called a "set" or "set substrate"). The USB connector provided on the set side
15 will be called a "set-side USB-B connector 10" below.
[0019]
Then, a male USB connector is attached to one end of a coaxial shielding
wire of an appropriate length an SMA (Sub Miniature Type A) connector is attached
to the other end. Hereinafter, the male USB connector will be called a "cable-side
20 USB-B connector 15" to distinguish from the set-side USB-B connector 10. The
SMA connector is normally used as a measuring connector. The set-side USB-B
connector 10 is a portion indicated by a thick dotted line in FIG. 1 and the cable-side
USB-B connector 15 is a portion indicated by a thin dotted line in FIG. 1. Each
connector is connected by 1-pin to 5-pin and fixed onto a substrate. This relation
25 also applies to FIGS. 6 and 8 described later.
[0020]
First, a general structure of the USN connector will be described with
reference to FIG. 1 and then, a concrete configuration of a USB input/output
apparatus in the present example will be described.
30 In general, the set-side USB-B connector 10 (female type) and the cableside
USB-B connector 15 (male type) each have five connection pins indicated by 1-
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pin to 5-pin and a shielding terminal. A uUSB-B connector is normally used as the
set-side USB-B connector 10 and the cable-side USB-B connector 15.
The B connector is a connector used generally on the set side and, by
contrast, as will be described with reference to FIG. 5, an A-type USB connector
5 capable of supplying power from the side of a host computer is normally used as a
USB connector connected to the side of the host computer.
Incidentally, using the A-type or AB-type (connector used for both the host
side and the set side) uUSB connector as a set-side USB connector in recent years,
but the set-side USB connector is handled as the B type and the host side USB
10 connector is handled as the A type here.
[0021]
As shown in FIG. 1, 1-pin of the set-side USB-B connector 10 is a
Vbus/MIC terminal for voltage supply and power is fed from the side of the host
computer (not shown) to the information terminal device (set) via 1-pin and also a
15 voltage is supplied to an earphone microphone or the like connected to the set. A
ferrite bead 11 for high-frequency cutoff is connected in series to a line to which 1-
pin of the set-side USB-B connector 10 is connected. Hereinafter, the ferrite bead
may be abbreviated simply as "FB".
[0022]
20 2-pin and 3-pin of the set-side USB-B connector 10 are terminals of a signal
line related to transmission and reception of a differential signal and when an audio
signal is input into these terminals, 2-pin (D- terminal) functions as a terminal of an
L channel and 3-pin (D+ terminal) functions as a terminal of an R channel. A
common mode choke 12 is connected to a line to which 2-pin and 3-pin used for
25 differential are connected. Then, high-frequency signals are cut off and only an
audio signal is passed by the common mode choke 12. In the description that
follows, the high-frequency signal may also be called an "RF signal" or "antenna
signal".
[0023]
30 4-pin of the set-side USB-B connector 10 is an ID terminal (ID is an
abbreviation of Identification, also called an "identification terminal") to identify the
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type of an inserted plug and the use to which the plug is applied.
In the set-side USB-B connector 10 in the present example, as shown in FIG.
1, 4-pin used as the ID terminal is used as an antenna terminal to receive TV
broadcasting or the like. Thus, a capacitor 14 of about 1000 pF is connected in
5 series to a line to which 4-pin is connected and an antenna signal supplied to 4-pin
via the capacitor 14 is supplied to a tuner circuit (not shown) (ANT in FIG. 1) in the
set.
[0024]
4-pin of the set-side USB-B connector 10 is also a pin used as a normal ID
10 terminal. High-frequency signals of television and the like are not needed to realize
the function as a normal ID terminal and an FB 13 as a high-frequency cutoff
element is connected in parallel with the capacitor 14 to the line to which 4-pin is
connected to remove such high-frequency signals. Accordingly, an ID signal from
which high-frequency antenna signals such as a television signal have been removed
15 is output to an ID identification circuit (not shown) on the set side.
Incidentally, 5-pin of the set-side USB-B connector 10 is a ground terminal
for grounding and a line to which 5-pin is connected is connected and grounded to an
external shield of the cable-side USB-B connector 15 and set described later.
[0025]
20 The USB-SMA conversion cable shown in FIG. 1 is, as described above, a
so-called coaxial cable in which the male cable-side USB-B connector 15 is
connected to a substrate provided at one end of a coaxial shielding wire 17. Like
the set-side USB-B connector 10, a joUSB connector is used also for the cable-side
USB-B connector 15 and, in addition to the B type, a uUSB connector of the A type
25 or AB type may also be used.
[0026]
A resistor 16 is connected between the ID terminal (4-pin) of the cable-side
USB-B connector 15 and a ground line and a USB connector for which use is
connected with the value of the resistor 16 and how a cable thereof is used can be
30 recognized from the set side.
Currently, the resistor 16 is defined only for an earphone, but will be used
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also for other purposes other than the earphone in the future. However, whether
power is supplied is recognized by, as will be described later, applying a voltage to a
Vbus terminal and shorting 2-pin (D- terminal) and 3-pin (D+ terminal) to start
charging.
5 [0027]
An SMA connector 18 shown in FIG. 1 is a terminal to which an external
antenna line or a cable from an antenna terminal of the home or the like is connected
and is known generally as a measuring connector. The characteristic impedance of
the SMA connector 18 is 50 Q and the SMA connector 18 has long been used for
10 wireless communication devices of mainly microwaves. We performed an
experiment of receiving a broadcast wave such as a television signal on the set side
using a USB-SMA conversion cable shown in FIG. 1.
[0028]
More specifically, as shown in FIG. 1, a core wire 19 as an inner conductor
15 of the coaxial shielding wire 17 cut into lengths of about 10 cm is connected to a line
of 4-pin of the cable-side USB-B connector 15. In addition, a metal shield 20 as an
outer conductor of the coaxial shielding wire 17 is connected to a line of 5-pin of the
cable-side USB-B connector 15. The USB-SMA conversion cable is produced by
leaving 1-pin to 3-pin of the cable-side USB-B connector 15 open with nothing being
20 connected.
[0029]
<2. Concrete example of the USB-SMA conversion cable>
FIGS. 2(A) to 2(D) show samples of the above USB-SMA conversion cable.
FIG. 2(A) is a plan view viewed from above, FIG. 2(B) is a sectional view of the
25 cable-side USB-B connector 15, FIG. 2(C) is a sectional view of the SMA connector
18, and FIG 2(D) is a front view. The dimension of each figure is based on the
standard of the USB connector and SMA connector. In FIGS. 2(A) to 2(D), the
same reference signs are attached to the same members as those in FIG. 1.
[0030]
30 As shown in FIGS. 2(A) to 2(D), the coaxial shielding wire 17 of about 10
cm in length and 2.6 mm in diameter is used as a sample of the produced USB-SMA
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conversion cable. As shown in FIG. 2(B), the narrower side of the cable-side USBB
connector 15 having a rectangular section has a width of 7 mm, which is suitable
as a connection terminal of a mobile phone or the like for which further slimming
down in the future is expected.
5 [0031]
Five samples of the USB-SMA conversion cable shown in FIGS. 2(A) to
2(D) are successively connected to the set-side USB-B connector 10 to examine
transmission characteristics of a high-frequency signal such as a television wave.
FIG. 3 is a diagram obtained by plotting the result.
10 [0032]
In the Japanese television broadcasting, the VHF band of 90 to 108 MHz (1
to 3 ch) and 170 to 222 MHz (4 to 12 ch) and the UHF band of 470 to 770 MHz (13
to 62 ch) are used. Incidentally, the VHF band may be divided to call 90 to 108
MHz as the VHF-L (low) band and 170 to 222 MHz as the VHF-H (high) band.
15 [0033]
Viewing FIG. 3 shows that pass characteristics of high-frequency signals in
all bands of TV broadcasting yield substantially the same results for five samples of
the USB-SMA conversion cable. That is, insertion losses of five samples of the
USB-SMA conversion cable are 1 dB or less in all frequency bands of the FM band
20 (70 to 90 MHz), the VHF band, and the UHF band, which shows that transmission
degradation is small. The above result shows that practically no problem is caused
if the ID terminal of an ordinary USB cable is used for reception of an antenna signal
of television or the like.
[0034]
25 <3. Verification of maintenance of a USB function>
We also verified whether the original USB function is maintained, in other
words, whether the USB function is degraded by using the ID terminals of the setside
USB-B connector 10 and the cable-side USB-B connector 15 for antenna
transmission. FIG. 4 is a diagram showing an eye pattern 40 to examine whether
30 the USB function is maintained.
[0035]
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The eye pattern 40 is also called an eye diagram or an eye opening ratio and
is created by sampling and superimposing the transition of a signal waveform many
times and graphically showing the result. The horizontal axis represents the time
and the vertical axis represents the voltage. If the eye pattern 40 is viewed and a
5 plurality of signal waveforms is superimposed in the same position (timing and
voltage), the waveform is considered to be a high-quality waveform and conversely,
if positions (timing and voltage) of signal waveforms are shifted, the waveform is
considered to be a low-quality waveform. It is also known that a waveform of
degraded transmission characteristics has a hexagonal shape (template 43) in the
10 center that is thin and flat and the area thereof is small.
[0036]
In the standard satisfying conditions for the USB 2.0 function, differential
signals 41, 42 passing signal lines of D+ = 0.4 V and D- = -0.4 V and having a phase
difference of 180° are simultaneously displayed and the waveform of the differential
15 signals is required to surround the hexagonal template 43 in the displayed eye pattern.
In the standard of USB 2.0, the clock of USB signal transmission is 480 Mbps.
The test is called an eye pattern test (or an eye diagram test) because the
relation between the signal lines and the template is similar to the shape of an open
human eye.
20 [0037]
Viewing FIG. 4 shows that the differential signals 41, 42 propagated through
the line to which 2-pin and 3-pin are connected are positioned between parallel lines
of D+ = 0.4 V, D- = -0.4 V and further, the hexagonal template 43 is positioned
inside a region surrounded by these two differential signals 41, 42. That is, FIG. 4
25 shows that if 4-pin of the USB terminal is used as an antenna, the eye pattern test is
passed, in other words, the USB standard is satisfied. From the above, it is clear
that the USB function is maintained even if a dipole antenna or an external antenna is
connected to the SMA connector of the USB-SMA conversion cable shown in FIGS.
2(A) to 2(D).
30 [0038]
<4. Connection example of a coaxial cable and a USB cable>
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FIGS. 5 and 6 show an embodiment in which two cables, a coaxial cable
similar to the USB-SMA conversion cable shown in FIG. 1 and an ordinary USB
cable, are connected to an input/output apparatus. FIG. 5 is a schematic block
diagram and FIG. 6 is a diagram showing connecting relations thereof in detail.
5 Incidentally, FIG. 5 shows an example in which, instead of the SMA connector 18
(see FIG. 1), a double-pole plug 23 whose diameter is 3.5 mm is connected to the
other end of the coaxial cable 17. The double-pole plug 23 is called a "03.5
double-pole plug". Instead of the double-pole plug 23, the SMA connector 18 or an
F connector normally used in the television may also be used. Hereinafter, the
10 cable that receives a broadcast wave such as the television signal shown in FIGS. 1,
2(A) to 2(D), 5, and 6 will be called simply the "coaxial cable" to distinguish from
the USB cable.
[0039]
In the connection example shown in FIG. 5, in addition to the coaxial cable
15 (coaxial shielding wire) 17, a USB cable 21 is connected to the cable-side USB-B
connector 15. Then, a cable-side USB-A connector 22 to connect to the host
computer side is connected to the other end of the USB cable 21. In addition to
power being supplied from the host computer (not shown) side to the set side,
various information signals including an audio signal are supplied through the USB
20 cable 21.
[0040]
The F connector normally used for input of the television is connected to the
other end of the coaxial cable 17 to connect to an antenna terminal in the home.
However, there is also a desire to receive a TV broadcast wave by using a
25 dedicated retractable rod antenna when using an information terminal device. Thus,
the case of connecting and using the above double-pole plug 23 or other small
coaxial connectors, instead of the SMA connector 18, is expected to increase in the
future.
[0041]
30 The double-pole plug 23 is used by being inserted into a double-pole jack 26
as a connector of a substrate 24 of an antenna unit having a rod antenna 25. The
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double-pole jack 26 of the substrate 24 is called a "03.5 double-pole jack". By
connecting the double-pole plug 23 and the double-pole jack 26, an information
terminal device (set) and an antenna for television signal reception can directly be
connected. Thus, even if the USB cable 21 is connected, noise from the side of the
5 host computer is resisted so that a broadcast wave can be received with stability. In
addition, the antenna unit is a separate body and so can advantageously be carried.
[0042]
FIG. 6 is a detail view showing details of the connecting relation in FIG. 5 at
a pin level of a USB input/output terminal. The same reference signs are attached
10 to the same members as those in FIG. 1. The structure of the set-side USB-B
connector 10 is the same as that shown in FIG. 1 and thus, the description thereof is
omitted.
As shown in FIG. 6, the cable-side USB-B connector 15 is connected to the
set-side USB-B connector 10 as a USB input/output apparatus. In the example of
15 FIG. 1, as described above, only the coaxial cable (USB-SMA conversion cable) 17
is connected to the cable-side USB-B connector 15.
[0043]
In the connection example shown in FIG. 6, in addition to the coaxial cable
17 to which the double-pole plug 23 is connected, the ordinary USB cable 21 is
20 connected to one end of the cable-side USB-B connector 15. As shown in FIG. 5,
the B-type cable-side USB-B connector 15 is connected to one end of the USB cable
21 and the A-type cable-side USB-A connector 22 to connect to a host computer is
connected to the other end thereof. The FB 27 for high-frequency cutoff is
connected on the set side to 1 -pin to which the power supply line of the USB cable
25 21 is connected and also the FB 30 for high-frequency cutoff is similarly connected
thereto on the host side. The FB 27, 30 are ferrite beads (FB) capable of
maintaining high-frequency characteristics even if a current flows and characteristics
thereof are different from those of FB 29, 32 connected to a ground line described
later.
30 [0044]
Common mode chokes 28, 31 are connected to 2-pin and 3-pin to which the
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differential signal line of the USB cable 21 is connected to the set side and the host
side respectively. Further, the FB 29 is connected to the ground line of the USB
cable 21 on the set side and the FB 32 is connected thereto on the host side. The FB
29, 32 inserted into the ground line have a magnetic material arranged around a coil
5 to create a state of high impedance at high frequencies, that is, a state of large highfrequency
losses. Then, a high-frequency current is converted into heat to remove
the high-frequency current.
However, under the assumption that USB characteristics and RF
characteristics of the coaxial cable 17 are maintained, the FB 30 and the common
10 mode choke 31 on the host side and the FB 32 connected to the ground line may be
omitted if the influence of power supply noise is small in terms of characteristics of
the USB cable 21.
[0045]
Incidentally, when the substrate to which the cable-side USB-B connector
15 15 is connected is used as a common substrate, the substrate and the connector
should be separated as far apart as possible in consideration of prevention of mutual
interference. Here, a first substrate 33 to which the coaxial cable 17 is connected
and a second substrate 34 to which the USB cable 21 is connected are separate. The
first substrate 33 becomes a first connection portion and the second substrate 34
20 becomes a second connection portion. Crosstalk between a signal on the side of the
USB cable 21 and a signal on the side of the coaxial cable 17 can be eliminated by
the separation so that a broadcast wave can be received with more stability on the
side of the coaxial cable.
[0046]
25 Thus, by attaching both of the USB cable 21 and the coaxial cable 17 to the
cable-side USB-B connector 15, communication with the host computer and
charging using the USB cable 21 and reception of a broadcast wave from an antenna
unit using the coaxial cable 17 become possible simultaneously.
[0047]
30 <5. Application example to an earphone antenna>
FIG. 7 is a diagram showing an earphone antenna 50 of about 1 m in total
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length produced by connecting a coaxial shielding wire 51 of 37.5 cm in length and
earphone cords 52, 53 of 62.5 cm in length.
The earphone antenna 50 is a kind of monopole antenna and configures an
antenna capable of receiving a radio wave in the VHF band for TV broadcasting with
5 the length of all of the coaxial shielding wire 51 and the earphone cords 52, 53, and
configures an antenna capable of receiving a radio wave in the UHF band for TV
broadcasting by the portion of the coaxial shielding wire 51.
[0048]
A male cable-side USB-B connector 53 attached to the coaxial shielding
10 wire 51 to connected to a set is the same as the cable-side USB-B connector 15 in
FIG. 1, but has, as will be described with reference to FIG. 8, a different connection
configuration of 1-pin to 5-pin.
On the other hand, the connector connected to earphone cords 55, 56 is not
the SMA connector 18 shown in FIGS. 2(A) to 2(D), but a connection portion 54 to
15 connect the ordinary earphone cord 55, 56 and the coaxial shielding wire 51 via a
substrate and the connection portion 54 is molded from resin. The connection
portion 54 becomes a boundary between the earphone cord 55, 56 and the coaxial
shielding wire 51. The earphone cords 55, 56 are integrally connected up to a
fixing portion 59, but are separated in the fixing portion 59 to be connected to an L-
20 side earphone 57 and an R-side earphone 58 respectively.
In the present example, a resin mold via a substrate is formed for the
connection of the coaxial shielding wire 51 and the earphone cords 55, 56, but
instead, the connection of an earphone jack and an earphone plug may also be
configured.
25 [0049]
The total length of the earphone antenna 50 is set to about 1 m and the
length of the coaxial shielding wire 51 is set to 37.5 cm. The total length of the
earphone antenna is decided here in consideration of the fact that the frequency
further decreases when the antenna is mounted on a human body and used. That is,
30 in the earphone antenna 50, the length of the coaxial shielding wire is adjusted to
37.5 cm, which is about 1/4 the wavelength (k/4) of 200 MHz, so that both of the
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VHF-H band and the UHF band of TV broadcasting can be received. Because the
UHF band (440 to 770 MHz) corresponds to a high-frequency band of approximately
200 MHz, a radio wave of TV broadcasting in the UHF band can also be received by
the earphone antenna 50.
[0050]
FIG. 8 is a diagram showing a concrete connecting relation of an earphone
antenna 60, which is the same as the earphone antenna 50 shown in FIG. 7. A
cable-side USB-B connector 62 connected to a coaxial shielding wire 61 is a male
connector and is connected to the female set-side USB-B connector 10. The female
set-side USB-B connector 10 attached to the side of the set substrate is the same as
the connector shown in FIG. 1 and so the description thereof is omitted.
[0051]
In the example of FIG. 8, the length of the coaxial shielding wire 61 is set to
37.5 cm, which is the same length as that of the coaxial shielding wire 51 in FIG. 7.
The cable-side USB-B connector 62 provided on the substrate on the side of the
coaxial shielding wire 61 is different from the cable-side USB-B connector 15 in FIG.
1 in a line configuration connected to each terminal (1-pin to 5-pin) of the cable-side
USB-B connector 62.
[0052]
The male cable-side USB-B connector 62 arranged on the substrate on the
side of the coaxial shielding wire 61 is provided opposed to the female set-side USBB
connector 10 arranged on the side of the set substrate. 1-pin of the cable-side
USB-B connector 62 is a terminal or power supply and is connected to a microphone
63 and further, an FB 64 to cut off high-frequency signals is connected in series to
the line.
[0053]
2-pin and 3-pin of the cable-side USB-B connector 62 are connected to a
signal line that transmits R and L audio signals by differentials and FB 65, 66 for
high-frequency cutoff are also connected to the line. Further, an FB 67 is connected
to 5-pin as a ground line of the cable-side USB-B connector 62. To satisfy both of
the ordinary USB cable transmission function and the antenna function of a highSP325871WO00
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frequency signal like a television signal, the DC resistance of the FB 67 inserted into
the ground line is desirably 1 Q or less.
[0054]
Thus, it is preferable to set the value of resistance of the FB 67 to 1 Q or
5 less, but if it should be impossible to achieve audio isolation with the value of 1 Q,
the value of the FB 67 may be set to 0 Q for use. That is, though antenna
characteristics are degraded, the ID terminal of 4-pin can be used as an antenna
terminal without the FB 67. If slight degradation of high band characteristics of
UHF is permitted, the function as an antenna terminal can be maintained without
10 inserting a capacitor 71d between a line of the ID terminal and the ground line.
[0055]
Lines of 1-pin, 2-pin, and 3-pin of the cable-side USB-B connector 62 are
connected to the ground line (line of 5-pin) via the microphone 63 and L and R
earphones 68, 69.
15 Particularly in the earphone antenna 60 of the present example, as will be
described later, the fact that a metal shield 72 as an outer conductor of the coaxial
shielding wire 61 is connected to the ID terminal (4-pin) of the cable-side USB-B
connector 62 has an important meaning. As shown in FIG. 6, the metal shield 72
connected to the ID terminal is a shielding line that is different from the ground line.
20 [0056]
When the male cable-side USB-B connector 62 is inserted into the female
set-side USB-B connector 10, it is necessary to discriminate (detect) whether an
antenna capable of receiving a radio wave of TV broadcasting or the like is inserted.
Thus, a resistor 70 is inserted between the line to which the ID terminal (4-pin) of the
25 cable-side USB-B connector 62 and the ground line to which 5-pin is connected.
Different values of resistance are set as the value of resistance of the resistor 70
depending on the type of the cable-side USB-B connector 62, in other words, for
which purpose the connector is used. Therefore, by detecting the value (value of
resistance) of the resistor 70, whether a USB connector having an antenna function
30 of TV broadcasting or the like is inserted can be detected.
[0057]
SP325871WO00
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When a radio wave of TV broadcasting or the like is received by a
conventional earphone antenna, generally a signal line constituting an R earphone
cable and a signal line constituting an L earphone cable are each caused to function
as an antenna line. In the earphone antenna, a radio wave is transmitted between
5 the core wire of a coaxial cable and the ground line and a transmitted antenna signal
is input into a receiver of TV broadcasting or the like by a pin jack connector.
[0058]
However, the transfer clock used for signal transfer in USB 2.0 is 480 Mbps
and a clock signal operates between the signal line and the ground line and thus, if
10 the ground of a USB cable is used as an antenna of a television signal, the antenna is
in a state in which the clock signal of 480 Mbps of USB is superimposed onaRF
signal of television or the like. Therefore, when the USB cable is used as an
antenna for TV broadcasting, the USB cable cannot be used for transmission of a
high-frequency signal of TV broadcasting or the like if connected in the same way as
15 a conventional earphone antenna. Incidentally, the clock of 480 Mbps in USB 2.0
corresponds to a frequency of 240 MHz and thus, the band particularly affected
adversely is the VHF-H band.
[0059]
In consideration of the above problem of the earphone antenna, an earphone
20 antenna in the present example has, as shown in FIG. 6, capacitors 71a to 71 d to
promote high-frequency connection inserted between a voltage line (1-pin), a signal
line (2-pin, 3-pin), and a ground line (5-pin) and an ID line (4-pin). The value of
the capacitors 71a to 7Id is approximately 1000 pF.
[0060]
25 In addition, the FB 64 to 67 are connected to the line to which 1-piri to 3-pin
of the cable-side USB-B connector 62 is connected and the line to which 5-pin is
connected so that an antenna signal like a television signal does not enter the set-side
USB-B connector 10 through these lines. That is, shielding at high frequencies is
created.
30 [0061]
Because the earphone antenna 60 shown in FIG 8 uses the line of the ID
. SP325871WO00
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terminal for input of the antenna for TV broadcasting, no ferrite bead (FB) is
connected to the ID line to which 4-pin is connected. In other words, while the FB
64 to 66 are connected to the lines to which 1-pin to 3-pin of the cable-side USB-B
connector 62 are connected and the ground line to which 5-pin is connected, no FB is
5 connected to the line to which 4-pin is connected. That is, only the line of 4-pin is
not shielded at high frequencies an antenna signal of television or the like is
transmitted to the set side through this line.
[0062]
Then, a radio wave of an antenna signal generated in each line immediately
10 before these FB 64 to 66 is actively superimposed on the ID line via the capacitors
71a to 7Id. This means that the ID line (antenna terminal) and other lines are
connected at high frequencies and are open in terms of DC. Therefore, when each
line of the USB cable is used for signal transmission or the like, no adverse effect
shows up.
15 [0063]
Also, as described above, the resistor 70 is connected between the ID line to
which 4-pin of the cable-side USB-B connector 62 is connected and the ground line.
The value of resistance of the resistor 70 is normally high impedance (hundreds of
kQ) and thus, the ID line and the ground line are open at high frequencies and
20 antenna characteristics are not affected by the ID line. To be noted is a case in
which after the FB 64 to 67 connected to each line other than the ID line pass,
connection is established by a capacitor such as connection capacity and in this case,
a high-frequency current flows to each terminal, which causes degradation of
antenna characteristics.
25 [0064]
Next, based on Tables 1, 2 and FIGS. 9(A) and 9(B), frequency-gain
characteristics of the earphone antenna described with reference to FIGS. 7 and 8
will be described. Table 1 and FIG. 9(A) show frequency-gain characteristics
exhibited by the earphone shown in FIG. 7 in the VHF band of TV broadcasting. In
30 the VHF band of 190 to 220 MHz, as shown in Table 1 and FIG. 9(A), gain
characteristics of -10 dB or more are exhibited in vertical polarization and
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10
characteristics of-16 dB or more are exhibited in horizontal polarization.
[0065]
Table 1
Frequency[MHz]
Peak [dBd]
Frequency[MHz]
Peak [dBd]
188.5
-9.27
188.5
-16.07
192 5
-9.45
192.5
-15.52
Vertical polarization
194.5
-9.49
198
-9.30
204
-9.40
210
-8.46
Horizontal polarization
194.5
-15.33
198
-14.66
204
-13.84
210
-12.46
216
-8.03
216
-11.43
222
-6.08
222
-9.08
[0066]
In the VHF band of 470 to 870 MHz, as shown in Table 2 and FIG. 9(B),
gain characteristics of -12 dB or more are exhibited in both of vertical polarization
and horizontal polarization. These results show that the earphone antenna 60 shown
in FIG. 8 functions adequately as an antenna of the VHF band and the UHF band of
TV broadcasting. These results also mean that the earphone antenna 60 is
applicable as an antenna for multimedia broadcasting planned to be broadcast using
the VHF band.
[0067]
Table 2
FrequencyLMHzJ
Peak [dBd]
Frequency[MHz]
Peak [dBd]
470
-12.00
470
-6.20
520
-7.80
520
-3.69
Vertical polarization
570
-8.63
620
-10.81
670
-9.67
720
-5.15
Horizontal polarization
570
-6.73
620
-5.21
670
-11.27
720
-3.18
770
-8.65
770
-1.45
906
-1.88
906
-0.97
w
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[0068]
<6. Substrate structure of a USB input/output apparatus to obtain pass
characteristics in the GHz band>
FIG. 10(A) to 10(C) are diagrams showing substrate structures to obtain
5 pass characteristics in the GHz band by the input/output apparatus according to the
present disclosure. FIG. 10(A) is a perspective view of the whole substrate and
FIGS. 10(B) and 10(C) are diagrams showing a physical relationship between two
parallel earth faces (earth layers) arranged across a dielectric and a USB input/output
apparatus. The substrate is a uUSB plug substrate on which the coaxial shielding
10 wire (coaxial cable) 17 and the cable-side USB-B connector 15 shown in FIG. 1 are
implemented.
[0069]
As shown in FIG. 10(A), a dielectric 83 is arranged between an upper earth
face 81 and a lower earth face 82. The earth face 81 and the earth face 82 are
15 connected by a through hole 77 and maintained at a conduction potential. The
upper earth face 81 is divided into an earth face 81a and an earth face 82b and an
electrode 84 to which the ID terminal (4-pin) of USB is connected is provided
therebetween.
[0070]
20 Electrodes to which 1-pin to 5-pin of the USB terminal are connected are
provided on the respective earth faces 81a, 81b, 82. FIG. 10(B) shows electrodes
provided on the earth face 81 of the top face (upper side) and FIG. 10(C) shows the
positions of electrodes provided on the earth face 82 of the bottom face (lower side).
FIGS. 10(B) and 10(C) are perspective views viewed from above.
25 [0071]
As shown in FIG. 10(B), a 2-pin (D- terminal) electrode 72, a 4-pin (ID
terminal) electrode 74, and a shielding terminal 76 of the USB connector are
arranged in the same plane as the earth faces 81a, 81b of the top face. Also, as
shown in FIG. 10(C), a 1-pin (power supply terminal) electrode 71, 3-pin (D+
30 terminal) electrode 73, and a 5-pin (GND terminal) electrode 75 are arranged in the
same plane as the earth face 82 of the bottom face. The shielding terminal 76 is
SP325871WO00
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directly connected to the earth face 81a and the 5-pin (GND terminal) electrode 75 is
directly connected to the earth face 82. The earth faces 81a, 81b of the top face and
the earth face 82 of the bottom face are electrically connected by the through hole 77.
[0072]
5 Viewing the planar structure of the upper earth face 81 shown in FIG. 10(B)
and the planar structure of the lower earth face 82 shown in FIG. 10(C) shows that
both structures are related as indicated by electrodes denoted by a solid line and the
positions of electrodes denoted by a dotted line of the perspective views. That is,
the 2-pin electrode 72 of the top face is arranged between the 1-pin electrode 71 and
10 the 3-pin electrode 73 of the bottom face. Also, the 4-pin electrode 74 of the top
face is arranged between the 3-pin electrode 73 and the 5-pin electrode 75 of the
bottom face. Further, the shielding electrode 76 of the top face connected to the
case is arranged on the outer side from the position of the 5-pin electrode 75 of the
bottom face.
15 [0073]
The mounting method of a USB connector may be the same as a
conventional method, but the mounting method of a coaxial line in the present
embodiment is devised. That is, the mounting method in the present embodiment
adopts a method by which a coating of the coaxial line is removed and a substrate is
20 sandwiched between a core wire portion and a ground portion and then soldered.
According to this method, an electromagnetic field is generated when a strip line is
between a signal line and the ground at the bottom and thus, pass characteristics of
high frequencies can be maintained in good conditions.
[0074]
25 FIG. 11 shows a result of measurement of one sample of the USB-SMA
conversion cable produced by adopting the substrate structure shown in FIGS. 10(A)
to 10(C) for the uUSB plug substrate. In this experiment, pass characteristics are
examined by connecting a semi-rigid cable to the ID terminal (4-pin) between uUSB
connectors and taking transmission characteristics in the GHz band into
30 consideration. FIG. 11 is a result of the above experiment. The semi-rigid cable
means a cable that cannot be freely bent to transmit a high-frequency wave, that is, a
€ SP325871WO00
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"slightly rigid" cable and is generally used by those involved in high-frequency
waves.
[0075]
Comparison of FIGS. 3 and 11 shows that while valid characteristics are
5 obtained only up to 950 MHz in FIG. 3, as a result of adopting the above substrate
structure, that frequency characteristics can be extended up to 1.8 GHz is verified in
FIG. 11. That is, as shown in FIG. 11, the maximum transmission loss is 1.5 dB or
less at 1.8 GHz, which shows that the USB-SMA conversion cable can be used
without causing any problem at 1.8 GHz or less.
10 [0076]
In the foregoing, the USB input/output apparatus has been described as an
embodiment of the present disclosure. However, the present disclosure is not
limited to the USB input/output apparatus and can also be applied to an input/output
apparatus using, for example, an MHL (Mobile High-definition Link) other than
15 USB.
[0077]
Here, characteristics of the ID terminal of the above USB connector will be
discussed. The USB connector is modified and expanded while upgrading quickly.
Thus, as an actual problem, the actual standard is not defined in most cases. In the
20 standard of USB-On-The-Go (USB-OTG) using the ID terminal, the ID terminal of a
host (side) device is basically connected to GND via a resistance of 10 Q or less and
the ID terminal of a device on the peripheral side (peripheral device) is OPEN or
connected to GND via a resistance of 100 KQ or more. In the actual operation,
each company has specifications specific to the company for operation such as using
25 each device depending of the value of resistance.
[0078]
When connection target devices are connected alone, the connection is oneto-
one (1:1), but a plurality of devices may be made connectable via a host device or
a USB hub so that devices are connected by switching the host device or the USB
30 hub. In this case, connections of multi-to-one, one-to-multi, and multi-to-multi
become possible and switching thereof is controlled by the host device or the like.
SP325871WO00
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These connection intended devices include, in addition to so-called host
devices (information processing devices) such as PCs and so-called peripheral
devices (information terminal devices) such as various mobile devices, USB chargers
or the like to supply power. Connection target devices also include various devices
5 connected to other interface standards via a host device or a hub for expansion device
connection.
[0079]
In any case, the ID terminal of a USB connector shows a stable potential
(fixed voltage) allowing to discriminate the connection target device at that time
10 excluding the time of change (change point, change timing) due to switching of the
connection target device. It is only necessary to obtain the resolution for
discrimination due to a potential change (displacement) and thus, the ID terminal is a
terminal whose operation (here, the information discrimination) is resistant even if
the potential slightly changes. The potential of the ID terminal changes only when
15 the connection target device is switched, which leads to less change points or change
frequency.
[0080]
The ID terminal is also a terminal to switch the internal operation of an
information terminal device including an input/output apparatus (or an input/output
20 connector) having the ID terminal by knowing the type of the connection target
device. Therefore, the ID terminal can be said to be a terminal to which an
information signal called a so-called operation mode switching signal is supplied.
[0081]
FIG. 12 is a diagram showing the functions of the uUSB terminal and the
25 MHL terminal in comparison. As shown in FIG. 12, MHL is a standard assuming a
combined use of a USB connector and can use the USB connector directly and has a
control signal (CBUS) terminal in a pin corresponding to the ID terminal of the USB
connector.
[0082]
30 In MHL, the CBUS terminal is used as a control signal of a solid wire.
That is, CBUS is used to set and control the output apparatus side (source) and the
SP325871WO00
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receiving apparatus side (sink) in a user usage environment of various audio/visual
devices. For example, CBUS is replaced by the DDC (Display Data Channel)
function in general DVI (Digital Visual Interface) connection. CBUS is also used
as an MHL sideband channel (MSC) realizing the control function between the
5 source and sink.
[0083]
Thus, the CBUS terminal is a terminal for an information signal that can be
called an operation mode switching signal. That is, in the interface standard of the
MHL standard, only by changing an internal operation of an information terminal
10 apparatus including an input/output apparatus (or an input/output connector) using
the same terminal for USB connector, the information terminal apparatus can be
made to support the MHL standard.
[0084]
An input/output apparatus according to the present disclosure naturally
15 includes, in addition to the embodiment (the USB input/output apparatus and MHL
input/output apparatus) disclosed herein, various application examples and
modifications without deviating from the spirit and scope of the present disclosure
described in claims.
[0085]
20 Additionally, the present technology may also be configured as below.
(1) An input/output apparatus,
wherein among information terminals of an input/output connector provided
in an information terminal device, at least one information terminal of information
terminals to switch an internal operation of the information terminal device is used
25 also as an antenna input terminal.
(2) The input/output apparatus according to (1),
wherein when at least the one information terminal is used further as
another information terminal, the other information terminal is an information
terminal of a frequency lower than a frequency of a received signal input from the
30 antenna input terminal.
(3) The input/output apparatus according to (1),
#
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SP325871WO00
wherein at least the one information terminal is an information terminal in
which content of information thereof is discriminated based on a potential of an input
information signal.
(4) The input/output apparatus according to any one of (1) to (3),
5 wherein at least the one information terminal is the information terminal
used to discriminate a connection target device, to discriminate whether the
connection target device is connected, or to select information during operation
switching.
(5) The input/output apparatus according to any one of (1) to (4),
10 wherein at least the one information terminal is an ID terminal used to
discriminate a connection target device.
(6) The input/output apparatus according to any one of (1) to (5),
wherein an antenna signal input into the antenna input terminal is a
broadcast wave signal of one of an FM band, a VHF band, and a UHF band or a
15 plurality of these bands.
(7) The input/output apparatus according to (6),
wherein a capacitor allowing a frequency in the bands to pass is connected
to a line to which at least the one information terminal is connected.
(8) The input/output apparatus according to (7),
20 wherein a high-frequency cutoff element having a high impedance for the
frequency in the bands is connected, in parallel with the capacitor, to the line to
which at least the one information terminal is connected.
(9) The input/output apparatus according to any one of (6) to (8),
wherein a terminal to which a line transmitting a differential signal is
25 connected is provided in the input/output connector and a common mode choke
element having a high impedance for a frequency in the bands is connected to a
terminal into which the differential signal is input.
(10) The input/output apparatus according to any one of (1) to (9),
wherein a ground line of the input/output connector is connected to a
30 shielding case of the information terminal device.
(11) The input/output apparatus according to any one of (1) to (10),
SP325871WO00
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wherein a first connection portion to connect a coaxial cable functioning as
an antenna that receives a broadband wave signal of one of an FM band, a VHF band,
and a UHF band or a plurality of these bands is provided in the input/output
connector.
5 (12) The input/output apparatus according to (11),
wherein the antenna to receive the broadcast wave signal or a coaxial
connector is connected to the other end of the coaxial cable.
(13) The input/output apparatus according to (11) or (12),
wherein a second connection portion to connect an input/output cable is
10 further provided in the input/output connector.
(14) The input/output apparatus according to (13),
wherein the first connection portion and the second connection portion are
separated on a substrate to which the input/output connector is fixed.
(15) The input/output apparatus according to (13) or (14),
15 wherein the first connection portion and the second connection portion are
connected so as to share a plurality of terminals of the input/output connector.
(16) The input/output apparatus according to (1) to (15),
wherein an antenna signal input into at least the one information terminal is
further extended to a frequency band used by GPS or a mobile phone.
20 (17) The input/output apparatus according to (16),
wherein the frequency band used by GPS or a mobile phone is a GHz band
and, to allow a signal in the GHz band to pass, a substrate of the input/output
connector includes two substrates arranged in parallel with each other in which
ground terminals are connected and also terminals to which each pin of the
25 input/output connector provided on an upper substrate and a lower substrate arranged
in parallel are arranged so as not to overlap when viewed from a top face.
(18) The input/output apparatus according to any one of (1) to (17),
wherein the information terminal device is a mobile information terminal
device.
30
Reference Signs List
^ SP325871WO00
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[0086]
17, 51, 61 coaxial shielding wire (coaxial cable)
10 set-side USB connector
15, 53, 62 coaxial line-side USB connector
5 11,13,27,30,29,32,64,65,66,67 ferrite bead (FB)
12, 28, 31 common mode choke
14,71a to 71d capacitor
16,70 resistor
18 SMA connector
10 20 metal shield
40 eye pattern
41,42 differential signal
43 template
55, 56 earphone cord
15 54 earphone jack
57, 58, 68, 69 earphone
63 microphone
71 power line connection terminal (1 -pin)
72 D+ line connection terminal (2-pin)
20 73 D- line connection terminal (3-pin)
74 ID connection terminal (4-pin)
75 earth terminal (5-pin)
76 shielding terminal
77 through hole
25 81,82 earth face
83 dielectric

• 29/33
SP325871WO00
CLAIMS
Claim 1
An input/output apparatus,
wherein among information terminals of an input/output connector provided
5 in an information terminal device, at least one information terminal of information
terminals to switch an internal operation of the information terminal device is used
also as an antenna input terminal.
Claim 2
The input/output apparatus according to claim 1,
wherein when at least the one information terminal is used further as
another information terminal, the other information terminal is an information
terminal of a frequency lower than a frequency of a received signal input from the
antenna input terminal.
Claim 3
The input/output apparatus according to claim 1,
wherein at least the one information terminal is an information terminal in
which content of information thereof is discriminated based on a potential of an input
information signal.
Claim 4
The input/output apparatus according to claim 1,
wherein at least the one information terminal is the information terminal
25 used to discriminate a connection target device, to discriminate whether the
connection target device is connected, or to select information during operation
switching.
Claim 5
30 The input/output apparatus according to claim 1,
wherein at least the one information terminal is an ID terminal used to
10
15
20
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discriminate a connection target device.
Claim 6
The input/output apparatus according to claim 1,
5 wherein an antenna signal input into the antenna input terminal is a
broadcast wave signal of one of an FM band, a VHF band, and a UHF band or a
plurality of these bands.
Claim 7
10 The input/output apparatus according to claim 6,
wherein a capacitor allowing a frequency in the bands to pass is connected
to a line to which at least the one information terminal is connected.
Claim 8
15 The input/output apparatus according to claim 7,
wherein a high-frequency cutoff element having a high impedance for the
frequency in the bands is connected, in parallel with the capacitor, to the line to
which at least the one information terminal is connected.
20 Claim 9
The input/output apparatus according to claim 6,
wherein a terminal to which a line transmitting a differential signal is
connected is provided in the input/output connector and a common mode choke
element having a high impedance for a frequency in the bands is connected to a
25 terminal into which the differential signal is input.
Claim 10
The input/output apparatus according to claim 1,
wherein a ground line of the input/output connector is connected to a
30 shielding case of the information terminal device.
4ft
SP325871WO00
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Claim 11
The input/output apparatus according to claim 1,
wherein a first connection portion to connect a coaxial cable functioning as
an antenna that receives a broadband wave signal of one of an FM band, a VHF band,
5 and a UHF band or a plurality of these bands is provided in the input/output
connector.
Claim 12
The input/output apparatus according to claim 11,
10 wherein the antenna to receive the broadcast wave signal or a coaxial
connector is connected to the other end of the coaxial cable.
Claim 13
The input/output apparatus according to claim 11,
15 wherein a second connection portion to connect an input/output cable is
further provided in the input/output connector.
Claim 14
The input/output apparatus according to claim 13,
20 wherein the first connection portion and the second connection portion are
separated on a substrate to which the input/output connector is fixed.
Claim 15
The input/output apparatus according to claim 13,
25 wherein the first connection portion and the second connection portion are
connected so as to share a plurality of terminals of the input/output connector.
Claim 16
The input/output apparatus according to claim 1,
30 wherein an antenna signal input into at least the one information terminal is
further extended to a frequency band used by GPS or a mobile phone.
• SP325871WO00
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Claim 17
The input/output apparatus according to claim 16,
wherein the frequency band used by GPS or a mobile phone is a GHz band
5 and, to allow a signal in the GHz band to pass, a substrate of the input/output
connector includes two substrates arranged in parallel with each other in which
ground terminals are connected and also terminals to which each pin of the
input/output connector provided on an upper substrate and a lower substrate arranged
in parallel are arranged so as not to overlap when viewed from a top face.
10
Claim 18
The input/output apparatus according to claim 1,
wherein the information terminal device is a mobile information terminal
device.