1. A communication device driven by gaining electric power from an electric power wave transmitted from an outside, wherein: a plurality of electric power wave routes supplying electric power obtained from 5 the electric power wave or a signal into the communication device are provided in the communication device; in the plurality of electric power wave routes, a first electric power wave route is connected to supply power to a circuit for driving a transmission element for transmitting a signal from the communication device; and I 0 the other electric power wave routes are connected to a signal generation portion for generating the signal transmitted by the communication device.

2. The communication device according to claim 1, wherein impedance of the signal generation portion is set higher than impedance of the 15 circuit for driving the transmission element.

3. The communication device according to claim 1 or 2, wherein a lower limit value of an operable voltage of a circuit for driving the transmission element is set lower than an operable voltage lower limit value of the 20 signal generation portion.

4. The communication device according to any one of claims 1 to 3, wherein in the plurality of electric power wave routes, a distribution transformer is connected to one electric power wave reception element receiving an electric power 25 wave for distribution by the distribution transformer to two or more, from each of which connection is made.

5. The communication device according to any one of claims I to 3, wherein the plurality of electric power wave routes are connected from a plurality of 30 electric power wave reception elements for receiving the electric power wave, respectively.

6. The communication device according to any one of claims 1 to 3, wherein at least one of the other electric power wave routes is connected to a clock 35 generation portion in the signal generation portion, and a clock obtained by regenerating the clock of the electric power wave by a clock regeneration circuit is used as a clock of the communication device.

7. The communication device according to any one of claims 1 to 3, wherein 40 a plurality of the other electric power wave routes are provided, each of the other electric power wave routes is connected to an individual rectification portion for -13- generating an individual rectification voltage, and by connecting the individual rectification portion to each of constituent elements of the signal generation portion, a starting order of each of the constituent elements of the signal generation portion can be arbitrarily set. 5

8. The communication device according to claim 4, wherein the electric power wave reception element is an electric power wave reception antenna, and the transmission element is a transmission antenna. 10 9. The communication device according to claim 4, wherein the electric power wave reception element is a coil for electric power wave reception, and the transmission element is a transmission coil.

10. The communication device according to claim 8, wherein 15 the electric power wave reception element connected to the other electric power wave route is an electric power wave reception antenna, and the electric power wave reception antenna is provided inside the electric power wave reception antenna constituting the electric power wave reception element connected to the first electric power wave route. 20

11. he communication device according to claim 8, wherein the electric power wave reception antenna is a non-resonant antenna.

COMMUNICATION DEVICE
BACKGROUND OF THE INVENTION
5 Field of the Invention
The present invention relates to a communication device driven by gaining
electric power from an electric power wave transmitted from an outside.
Description of the Related Art
Communication devices not having a power supply in itself includes those in
I 0 which an electric power wave transmitted from an external wireless power feed
device is received, and an operation power of the communication device itself is
generated from that electric power wave. Moreover, such communication devices
include a device which has a function of holding information inside the
communication device and transmitting an information as a signal wave toward the
15 outside during an operation of the communication device.
In such a device, relatively large power is often consumed during the
transmission of the signal wave. Thus, power consumption increases at the same
time as start of the transmission of the signal wave, and an internal voltage drop of
the communication device might occur. When an amount of internal voltage drop
20 exceed the lower limit of a rated voltage of an internal circuit of the communication
device, the communication device enters a state in which a normal operation is
difficult, and a malfunction might occur.
As means for preventing such occurrence of the malfunction, there is a method
of applying a reset operation to a CPU or the like so as to stop the operation of the
25 internal circuit when the internal voltage falls under the rated voltage. (Japanese
Patent Laid-Open Publication No. 09-1 30999)
However, the fact that the reset operation is performed when the internal
voltage falls under the rated voltage and the operation in the internal circuit such as
the CPU is stopped means, in the communication device, that transmission of the
30 signal wave is stopped during that period, and the subsequent transmission start
timing is delayed. That is, according to this method, an unstable operation of the
communication device can be avoided, but the delay of the signal wave transmission
start timing has a problem that leads to a performance drop such as lowering of a
response speed, a reduction of a communication range and the like.
35 Thus, the present invention provides a communication device which can stably
perform an operation of an internal circuit without a delay in operation start timing of
the communication device by gaining electric power from the electric power wave
transmitted from an outside, that is, by so-called wireless power feed.
SUMMARY OF THE INVENTION
- 3 -
In order to solve the above-described problems, in the present invention, a
plurality of electric power wave routes supplied from the electric power wave are
provided in the communication device, and in the plurality of electric power wave
routes, a first electric power wave route is connected so as to supply power to a
5 circuit for driving a transmission element for transmitting signals from the
communication device, while the other electric power wave routes are connected to a
signal generation portion for generating signals transmitted by the communication
device.
According to the present invention, the communication device which can
10 perform a stable operation without delaying the operation start timing of the
communication device can be provided.
Problems, configurations and advantageous effects other than the above will
be made apparent from description of the following embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. I is an entire configuration view of a communication device in the present
invention;
FIG. 2 is an entire configuration view of the communication device for
distributing power from one reception antenna by a distribution transformer;
20 FIG. 3 is an entire configuration view of the communication device including a
clock regeneration circuit;
FIG. 4 is an entire configuration view of the communication device provided
with three or more reception antennas;
FIG. 5 is an entire configuration view of the communication device using a coil
25 for a reception element; and
FIG. 6 is an entire configuration view of the communication device having a
second electric power wave reception antenna provided inside a first electric power
wave reception antenna.
30 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Embodiments of the present invention will be described below by referring to
the drawings.
An electric power wave route in the present invention means a series of
connection started from a reception element receiving an electric power wave
35 transmitted from an outside in order to transmit electric power or signals .
(Embodiment 1)
In this embodiment, there will be described
an embodiment of a communication device driven by gaining electric power
which is gained from an electric power wave transmitted from an outside, wherein:
a plurality of electric power wave routes supplying electric power obtained from
the electric power wave or a signal into the communication device are provided in the
communication device;
in the plurality of electric power wave routes, a first electric power wave route
5 is connected to supply power to a circuit for driving a transmission element for
transmitting signals from the communication device; and
the other electric power wave routes are connected to a signal generation
portion for generating signals transmitted by the communication device.
Moreover, in this embodiment, there will be also described
10 an embodiment of
a communication device wherein impedance of the signal generation portion is set
higher than impedance of the circuit for driving the transmission element.
There will be also described an embodiment of
a communication device wherein a lower limit value of an operable voltage of a circuit
15 for driving the transmission element is set lower than an operable voltage lower limit
value of the signal generation portion.
There will be also described an embodiment of
a communication device wherein the plurality of electric power wave routes are
connected from a plurality of electric power wave reception elements for receiving the
20 electric power wave, respectively.
There will be also described an embodiment of
a communication device wherein the electric power wave reception element is an
electric power wave reception antenna, and a transmission element is a transmission
antenna.
25 This embodiment provides a communication device which can stably perform
an operation of an internal circuit by providing power supply to a signal wave
transmission element involving relatively large power consumption in many cases
independently from the other portions. For example, in a communication device in
which the power consumption increases in transmission of the signal wave, a stable
30 operation of a digital circuit (a signal wave generation circuit, for example) can be
obtained.
FIG. 1 is a view illustrating an embodiment of a communication device
according to the present invention. The communication device of this embodiment
includes a first electric power wave reception antenna 101 as an electric power wave
35 reception element. Electric power obtained by the first electric power wave
reception antenna 101 passes through a first electric power wave route illustrated
below. First, it is converted to an arbitrary voltage in a conversion transformer 104,
and an output of the conversion transformer 104 is inputted into a first rectification
portion 100. The first rectification portion 100 rectifies the input from the first
40 conversion transformer 104 by a bridge rectifier circuit 102. An output of the bridge
- 5 -
rectifier circuit 102 is rectified by a stabilization circuit 103 and becomes a
rectification voltage Vdd. Here, the first electric power wave route ends.
Moreover, this communication device also includes a second electric power
wave reception antenna 133 as an electric power wave reception element. Electric
5 power obtained by the second electric power wave reception antenna 133 passes
through another electric power wave route illustrated below. First, it is converted to
an arbitrary voltage in a conversion transformer 134. Then, an output of the
conversion transformer 134 is inputted into a second rectification portion 130. The
second rectification portion performs rectification by a bridge rectifier circuit 131, and
10 an output of the bridge rectifier circuit 131 is rectified by a stabilization circuit 132 and
becomes a rectification voltage Vcc. Here, the other electric power wave route ends.
The electric power by this electric power system is supplied as power for the signal
generation portion 120.
Moreover, this communication device includes a signal wave transmission
15 antenna 11 1 as a transmission element. The signal wave transmission antenna I 1 1
is connected to a transmission antenna driving portion 110 via a conversion
transformer 11 2. The transmission antenna driving portion I 1 0 is realized by using
an FET 11 3, for example. A primary-side one end of the conversion transformer
112 is connected to a drain terminal of the FET 113, while the other end is connected
20 to Vdd. Moreover, a source terminal of the FET 113 is connected to the ground,
and by inputting a transmission signal to a gate terminal of the FET 11 3, a signal
current is made to flow to the transmission antenna 11 1. When the signal current is
generated in the transmission antenna 11 1, a magnetic field is generated, and a
signal wave is transmitted.
25 A transmission signal is generated in the signal generation portion 120. The
signal generation portion 120 includes a ROM 122 for storing signal information, for
example, and the ROM 122 is connected to a calculation portion 121. Moreover, a
clock generation portion 124 for generating a clock used for calculation is connected
to the calculation portion 121. Moreover, the calculation portion 121 encodes the
30 signal information read out of the ROM 122 and outputs it as the transmission signal.
The outputted transmission signal is modulated in a modulation portion 123 and is
inputted into the transmission antenna driving portion 11 0.
Moreover, input impedance of the signal generation portion 120 is set higher
than input impedance of the transmission antenna driving portion 1 10, and a lower
35 limit value of an operable voltage of the transmission antenna driving portion 110 is
set lower than an operable voltage lower limit value of the signal generation portion
120.
As described above, according to this embodiment, by providing two electric
power wave reception antennas, the two electric power wave routes are provided
40 independently. Thus, the first electric power wave route can be used for supplying
power to a circuit (transmission antenna driving portion 110) with larger current
- 6 -
consumption for generating a signal current in the signal wave transmission antenna,
while the other electric power wave route can be used as an independent power
supply to a circuit (signal generation portion 120) with smaller current consumption
executing generation of the transmission signal, control of the entire device and the
5 like.
Then, even if the power supply voltage of the transmission antenna driving
circuit 1 10 drops by the transmission of the signal wave, since the power supply of
the transmission signal generation portion 120 is separated from the former, the
voltage drop of the latter can be suppressed. That is, the signal generation portion
10 120 which should have conventionally stopped its operation due to the voltage drop
in transmission of the signal wave can be continuously operated.
That is, according to this embodiment, by separating the power supply Vdd of
the transmission antenna driving portion 11 0 from the power supply Vcc of the signal
generation portion 120, even if the Vdd voltage drops due to the transmission of the
15 signal wave, the voltage drop of Vcc can be suppressed, and a stable operation of
the signal generation portion 120 can be obtained.
Moreover, if supply of Vcc is sufficient, operation possibility of this
communication device depends on an input rated lower limit value of the
transmission antenna driving portion I 10. That is, the transmission antenna driving
20 portion 110 is capable of operation as long as a drain current of the FET 113 is
obtained, and since the drain current can be generated with a smaller voltage than
Vcc, assuming that an antenna driving circuit is capable of operation at a low voltage,
the transmission antenna driving portion becomes capable of stable operation with
low input power. As a result, stability of the communication device as a whole can
25 beimproved.
In the example illustrated in FIG. 1, the first electric power wave reception
antenna 101 and the second electric power wave reception antenna 133 are made
serial resonant antennas, but they may be parallel resonant antennas.
Moreover, by making the signal wave transmission antenna 11 1 a parallel
30 resonant antenna, impedance of the signal wave transmission antenna 11 1 rises,
and current consumption of Vdd can be reduced.
The signal wave transmission antenna 11 1 may be made a serial resonant
antenna.
Moreover, by connecting a conversion transformer to each of the
35 transmission/reception antennas, impedance of each antenna can be easily matched
with the impedance of a communication target.
The conversion transformer 104, the conversion transformer 112, and the
conversion transformer 134 connected to each antenna can obtain effects of
impedance conversion, balanced/unbalanced conversion, and DC decoupling, but if
40 the above-described effects are not necessary, the conversion transformers may be
- 7 -
non-mounted, and in that case, power loss by the conversion transformer can be
reduced .
Moreover, a bipolar transistor may be used instead of the FET I13 in the
transmission antenna driving portion 110. In this case, since a base voltage
5 required for driving the bipolar transistor is lower than a gate voltage required for
driving the FET, the transmission antenna driving portion 110 is made operable even
if the voltage of a transmission signal outputted by the signal generation portion 120
further falls.
Moreover, if modulation processing can be executed in the calculation portion
10 121, the modulation portion 123 is not required, and reduction of power consumption
and cost reduction are made possible by reduction in the number of components.
Moreover, regarding the signal information, information stored in the ROM 122
is read and also, it can be inputted from an outside of this communication device.
Moreover, in this embodiment, power of the signal generation portion is all fed
15 from the rectification portion 130, but power supply from the rectification portion 130
may be made to a part of circuits or only an IC of the signal generation portion 120.
By reducing power supply destinations of the rectification portion 130 so as to reduce
a load, electric power that should be received by the reception antenna 133
decreases, and the dimension of the reception antenna 133 can be reduced.
20 Moreover, in this embodiment, the similar effects can be obtained by replacing
the signal wave transmission antenna 11 1 by an element outputting a physical signal
(element with large power consumption with respect to the signal generation portion
120) such as a video display device outputting a light signal or a speaker outputting a
sound signal.
25 (Embodiment 2)
FIG. 2 is an embodiment of a communication device, wherein, in a plurality of
electric power wave routes, a distribution transformer is connected to one electric
power wave reception element receiving an electric power wave for distribution by
the distribution transformer into two or more, from each of which connection is made.
30 The embodiment 2, more specifically, includes, similarly to the embodiment 1,
the rectification portion 100, the rectification portion 130, the signal wave
transmission antenna 11 1, the transmission antenna driving portion 11 0, the signal
generation portion 120, and the conversion transformer 112. Moreover, an electric
power wave reception antenna 510 and a distribution transformer 51 1 for distributing
35 the electric power received by the electric power wave reception antenna 51 0 are
provided, and the electric power distributed by the distribution transformer 51 1 is
inputted into the rectification portion 100 and the rectification portion 130.
According to this embodiment, two rectification power supplies can be
obtained with one electric power wave reception antenna 51 0, and cost reduction
40 and reduction of a component mounting area can be made possible.
(Embodiment 3)
- 8 -
FIG. 3 is an embodiment of a communication device wherein at least one of
the other electric power wave routes is connected to a clock generation portion in the
signal generation portion, and a clock obtained by regenerating the clock of the
electric power wave by a clock regeneration circuit is used as a clock of the
5 communication device.
More specifically, the embodiment 3 includes the first electric power wave
reception antenna 101, the first rectification portion 100, the signal wave transmission
antenna 1 11, the transmission antenna driving portion 11 0, the signal generation
portion 120, and the conversion transformer 104 and the conversion transformer 112,
10 similarly to the embodiment 1, and the second electric power wave reception antenna
133 is connected to a clock regeneration circuit 201. In the clock regeneration
circuit 201, the clock of the received electric power wave is regenerated and inputted
into the calculation portion 121. In the calculation portion 121, calculation
processing is executed by a clock inputted from the clock regeneration circuit 201.
15 The clock regeneration circuit 201 can be realized by a bias circuit and a
limiter circuit as illustrated in FIG. 2, for example. The signal outputted by the
second electric power wave reception antenna 133 by receiving the electric power
wave becomes a differential signal having the amplitude depending on electric power
wave intensity. This differential signal is given a bias voltage by being inputted into
20 the bias circuit, which is outputted as a single end signal (clock signal), and is made
capable of being inputted into the calculation portion. Moreover, since the
amplitudes of the differential signal and the clock signal depend on the electric power
wave intensity, when the electric power wave at high intensity is received, there is a
risk that the clock signal exceeds an input rate of the calculation portion. In order to
25 prevent that, a limiter circuit is provided so as to limit the amplitude of the clock signal.
According to this embodiment, by regenerating the clock from the electric
power wave, an oscillator with relatively large power consumption of several tens
mW can be unnecessary, and the power consumption can be reduced.
Moreover, by raising impedance of the clock regeneration circuit 201, an input
30 voltage into the circuit can be raised in an early stage, and the clock can be
established earlier than start-up of the other circuits, whereby a malfunction of the
device can be prevented.
(Embodiment 4)
FIG. 4 is an embodiment of a communication device wherein a plurality of the
35 other electric power wave routes are provided, each of the other electric power wave
routes is connected to an individual rectification portion for generating an individual
rectification voltage, and by connecting the individual rectification portion to each of
constituent elements of the signal generation portion, a starting order of each of the
constituent elements of the signal generation portion can be arbitrarily set.
40 The embodiment 4 includes, more specifically, in addition to the embodiment 1,
a plurality of electric power wave reception antennas (an electric power wave
- 9 -
reception antenna 333A, an electric power wave reception antenna 333B, an electric
power wave reception antenna 333C) and includes conversion transformers for
transmitting electric power received by the respective antennas (a conversion
transformer 334A, a conversion transformer 334B, a conversion transformer 334C),
5 and rectification portions (a rectification portion 330A, a rectification portion 330B, a
rectification portion 330C) for rectifying electric power from the conversion
transformers, an individual rectification voltage (VccA, VccB, VccC) is generated from
each of the rectification portions, and power is supplied individually to each of the
constituent elements of the signal generation portion 120.
10 According to this embodiment, since the constituent element of the signal
generation portion 120 individually receives power supply, an influence of power
consumption increaseldecrease with respect to each other is reduced.
Moreover, by adjusting dimensions and frequency characteristics of the
reception antennas 333A, 333B, and 333C as well as a turn ratio (a ratio of winding
15 turn numbers) of the conversion transformers 334A, 334B, and 334C, VccA, VccB,
and VccC can be set arbitrarily, and by arbitrarily setting impedance of each of the
circuits using the individual electric power wave reception antennas, a rising order of
the circuits can be set arbitrarily. As a result, the starting order of each of the
constituent elements of the signal generation portion can be set arbitrarily. That is,
20 by setting the impedance of the circuit using the specific electric power wave
reception antenna, a power supply voltage can be raised in a stage earlier than the
other circuits, and operation start timing can be expedited.
As a result, by delaying rise of VccC supplying power to the calculation portion
more than VccA and VccB, for example, the operation of the calculation portion can
25 be started after the other constituent elements are stably operated.
If rise of the modulation portion is later than that of the calculation portion,
possibility that data is not transmitted normally is generated, while if rise of the ROM
is later than that of the calculation portion, possibility that the calculation portion
reads out wrong data is generated. However, if the rise of the calculation portion
30 can be set to be later than the rises of the ROM and the modulation portion, the
device can be operated stably.
Moreover, by providing an electric power wave reception antenna individually
only in a part of the transmission signal generation circuit, that is, a circuit with a high
rated voltage or a circuit requiring stable operation, for example, electric power borne
35 by the antenna is reduced, and the present invention can be realized by a smallersized
antenna.
(Embodiment 5)
FIG. 5 is an embodiment of a communication device wherein an electric power
wave reception element is an electric power wave reception coil and a transmission
40 element is a transmission coil.
- 10 -
The embodiment 5, more specifically, includes electric power wave reception
coils 41 0 and 430 and a signal wave transmission coil 420 instead of the electric
power wave reception antennas 101 and 133 and the signal wave transmission
antenna 11 1 in the embodiment 1.
According to this embodiment, since the transmission/reception circuit by the
coil does not require adjustment of a resonant frequency as in the
transmission/reception circuit by a resonant antenna, designing is facilitated, and
characteristic deterioration caused by frequency fluctuation of a
transmission/reception signal can be decreased.
(Embodiment 6)
FIG. 6 is an embodiment of a communication device wherein an electric power
wave reception element connected to the other electric power wave route is an
electric power wave reception antenna, and the electric power wave reception
antenna is provided inside an electric power wave reception antenna constituting the
electric power wave reception element connected to the first electric power wave
route, and of a communication device wherein the electric power wave reception
antenna is non-resonant antenna.
The embodiment 6, more specifically, includes the second electric power wave
reception antenna 133 in the embodiment 1 inside the first electric power wave
reception antenna 101.
When a plurality of the electric power wave reception antennas are provided,
the increase in the number of antennas increase the space of an antenna mounting
area, and expand the size of the device itiself. As a solution to that, the second
electric power wave reception antenna 133 is installed inside the first electric power
wave reception antenna 101 as illustrated in FIG. 2 so that the antenna mounting
area can be effectively used, and the expansion of the area of device can be
prevented.
Thus, a part of or the whole of the other constituent element other than the
second electric power wave reception antenna may be provided inside the first
electric power wave reception antenna.
At this time, if the dimensions of the first electric power wave reception
antenna 101 and the second electric power wave reception antenna 133 are close to
each other, a distance between the both antennas becomes short, and a degree of
electric coupling between the both antennas (mutual inductance, mutual capacitance)
increases. If the electric coupling between the antennas increases, a reception loss
increases, and the reception characteristics of the antenna deteriorate.
As a solution to that, by setting the dimension of the first electric power wave
reception antenna 101 to approximately several hundreds mm and by setting the
dimension of the second electric power wave reception antenna 133 similarly to
approximately several tens mm, for example, an interval between the outer antenna
(the first electric power wave reception antenna 101) and the inner antenna (second
- 11 -
electric power wave reception antenna 133) can be enlarged, and the electric
coupling between the antennas can be reduced, that is, the reception characteristics
deterioration of the antenna can be prevented.
Regarding the dimension of the second electric power wave reception antenna
5 133, since a relation of the antenna area oc antenna induction voltage ocd (antenna
reception power) holds true, power consumption of the circuit to which electric power
is supplied from the second electric power wave reception antenna I33 is set to one
hundredth of the power consumption of the circuit to which the electric power is
similarly supplied from the first electric power wave reception antenna 101, for
10 example, an antenna area ratio can be reduced to one tenth.
Moreover, in the resonant antenna using resonance of the inductance and the
capacitance as illustrated in the embodiment I , though reception characteristics of
the antenna is improved, an allowable margin of the resonant frequency is narrow (a
receivable frequency range is narrow) and is largely affected by an error of a
15 constant of a component to be mounted. Thus, the resonant frequency needs to be
adjusted after manufacture of the device, and an increase of manufacturing
processes and a cost increase are incurred.
As a solution to that, in FIG. 6, the second electric power wave reception
antenna 133 is made a non-resonant antenna. In the non-resonant antenna, the
20 resonant frequency does not have to be adjusted, and an adjustment process is not
reqired. At this time, by suppressing power consumption of the circuit to which
electric power is supplied from the second electric power wave reception antenna to
several mW or less, the electric power that should be received by the second electric
power wave reception antenna 133 is reduced, and the antenna can be made a non-
25 resonant antenna, while the antenna dimension is reduced to several tens mm.
The present invention is not limited to the above-described embodiments but
includes various variations. Moreover, a part of the configuration of one of the
embodiments can be replaced by another embodiment configuration. Moreover, the
above-described embodiments are described in order to explain the present
30 invention so as to be understood easily and are not necessarily intended to be limited
to those provided with all the configurations described above.
As described in the explanation of the embodiment 1, the various functions
included in the communication device are not limited to those described in the
embodiment, but addition and deletion of the various functions can be made.
35 Moreover, it is needless to say that the configuration of the circuit for realizing the
functions and the like are not limited to the embodiments, but various variations are
possible.

We claim:
1. A communication device driven by gaining electric power from an electric
power wave transmitted from an outside, wherein:
a plurality of electric power wave routes supplying electric power obtained from
5 the electric power wave or a signal into the communication device are provided in the
communication device;
in the plurality of electric power wave routes, a first electric power wave route
is connected to supply power to a circuit for driving a transmission element for
transmitting a signal from the communication device; and
I 0 the other electric power wave routes are connected to a signal generation
portion for generating the signal transmitted by the communication device.
2. The communication device according to claim 1, wherein
impedance of the signal generation portion is set higher than impedance of the
15 circuit for driving the transmission element.
3. The communication device according to claim 1 or 2, wherein
a lower limit value of an operable voltage of a circuit for driving the
transmission element is set lower than an operable voltage lower limit value of the
20 signal generation portion.
4. The communication device according to any one of claims 1 to 3, wherein
in the plurality of electric power wave routes, a distribution transformer is
connected to one electric power wave reception element receiving an electric power
25 wave for distribution by the distribution transformer to two or more, from each of
which connection is made.
5. The communication device according to any one of claims I to 3, wherein
the plurality of electric power wave routes are connected from a plurality of
30 electric power wave reception elements for receiving the electric power wave,
respectively.
6. The communication device according to any one of claims 1 to 3, wherein
at least one of the other electric power wave routes is connected to a clock
35 generation portion in the signal generation portion, and a clock obtained by
regenerating the clock of the electric power wave by a clock regeneration circuit is
used as a clock of the communication device.
7. The communication device according to any one of claims 1 to 3, wherein
40 a plurality of the other electric power wave routes are provided, each of the
other electric power wave routes is connected to an individual rectification portion for
-13-
generating an individual rectification voltage, and by connecting the individual
rectification portion to each of constituent elements of the signal generation portion, a
starting order of each of the constituent elements of the signal generation portion can
be arbitrarily set.
5
8. The communication device according to claim 4, wherein
the electric power wave reception element is an electric power wave reception
antenna, and the transmission element is a transmission antenna.
10 9. The communication device according to claim 4, wherein
the electric power wave reception element is a coil for electric power wave
reception, and the transmission element is a transmission coil.
10. The communication device according to claim 8, wherein
15 the electric power wave reception element connected to the other electric
power wave route is an electric power wave reception antenna, and the electric
power wave reception antenna is provided inside the electric power wave reception
antenna constituting the electric power wave reception element connected to the first
electric power wave route.
20
11. he communication device according to claim 8, wherein
the electric power wave reception antenna is a non-resonant antenna.