DESC: FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See section 10, rule 13)

MULTIBAND SINGLE COMPACT PACKAGED RF JAMMER WITH MULTIBAND PATCH ANTENNAS TO COUNTER MOBILE COMMUNICATION

BHARAT ELECTRONICS LIMITED
WITH ADDRESS:
OUTER RING ROAD, NAGAVARA, BANGALORE 560045, KARNATAKA, INDIA

THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED.

TECHNICAL FIELD
[001] The present disclosure relates generally to a jammer and more particularly, relates to a multiband single compact packaged RF Jammer with multiband patch Antennas to counter mobile communication.
BACKGROUND
[002] In the 21st century, technology evolution is both boom and bane. Every day or other, news on unethical use of technology are flooded in all sources of media. The most common source of unethical use of technology comes from the mobile Communication evolution and the use of telecommunication devices i.e. mobile phone. Generally, individuals have moved from no communication device to Mobile phone with 4 G network and further to evolution to 5G. The unethical use of telecommunication technology has become a curse to society.
[003] In an example, the cellular/mobile phones with advance communication technology increases corrupt practices during Examinations, addiction to electronic device increases disturbance during conferences. Further, it may lead to leakage of confidential/secret data from organization, unethical information transfer in prisons/parliament and the mobile phone may use as Bomb Trigger. Nowadays, the mobile phones are used to control the bombs or explosive devices that can be detonated by remotely controlling the mobile phones.
[004] One of the prior art discloses a system for simultaneously communicating and jamming other RF signals. In some radio jamming applications, a wide bandwidth radio noise signal is transmitted at a high power level, which prevents the reception of communication signals by overwhelming the communications signal(s) at the receiver. It is often desirable to maintain one’s own communications through the jamming signal, while simultaneously jamming others, even in the same general frequency bands. If the jamming signal source is close to one's own communications receiver, this task can be very difficult. In some cases, the jamming signal source is co-located with a communications receiver that the user does not want jammed, as in the case of a military vehicle on patrol or sited at a remote location.
[005] Another prior art discloses a multi- band jammer. A jammer for jamming communications in a communications system where the communications system operates with digital bursts having burst periods measured in time and occurring in a communication frequency band having a transmit band and a receive band.
[006] Further prior art discloses a Jammer transmitter. A jammer transmitter comprising a comb spectrum generator which includes pulse generator means adapted to produce a pulse train at a frequency corresponding to the channel spacing of signals to be jammed, and a bandpass filter which has a passband including a bandwidth occupied by the signals to be jammed and which is responsive to the pulse train for providing within this bandwidth comb generator output signals at harmonics of the pulse train frequency, said transmitter further comprising a power amplifier operative to amplify the comb generator output signals so as to produce jamming pulses and aerial means for radiating the jamming pulses, the width of the pulses of the pulse train being short enough to ensure that the harmonics of the pulse train frequency occur throughout the said bandwidth.
[007] With increase in unethical practices in mobile communication system in restricted area, there is a need in the art with a cost effective, portable solution in terms of Multiband single compact packaged RF transmitter/jammer with multiband patch antenna, to paralyze mobile communication.
SUMMARY OF THE INVENTION
[008] An aspect of the present invention is to address at least the above-mentioned problems and/or disadvantages and to provide at least the advantages described below.
[009] Accordingly, in one aspect of the present invention relates to a multiband RF jammer (500), the jammer comprising: a plurality of noise boosters (510), wherein each of the noise booster is configured to generate, boost and pump an RF noise to a wireless environment, a plurality of antennas (520) coupled to plurality of respective noise boosters, wherein each of the antenna receives the RF noise from each of the respective noise booster and transmits the received RF noise to the wireless environment, atleast one AC-DC power supply (530) configured to provide power to the plurality of noise boosters, at least one thermal sensor (540) configured to maintain the proper thermal management and a LED display (550) to indicate health condition of each of the noise boosters.
[0010] Other aspects, advantages, and salient features of the invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses exemplary embodiments of the invention.
BRIEF DESCRIPTION OF ACCOMPANYING DRAWINGS
[0011] The detailed description is described with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the drawings to reference like features and modules.
[0012] Figure 1 illustrates a front view of jammer showing antenna, indicator and other utilities according to an exemplary implementation of the present disclosure.
[0013] Figure 2 illustrates a compact multiband patch antenna according to an exemplary implementation of the present disclosure.
[0014] Figure 3 illustrates a modulated baseband sweep for RF noise source to avoid frequency blank according to an exemplary implementation of the present disclosure.
[0015] Figure 4 illustrates a RF shield for intra-band isolation and thermal management according to an exemplary implementation of the present disclosure.
[0016] Figure 5 illustrates a pictorial representation of multiband single compact packaged RF transmitter/jammer according to an exemplary implementation of the present disclosure.
[0017] Figure 6 illustrates an individual noise booster according to an exemplary implementation of the present disclosure.
[0018] It should be appreciated by those skilled in the art that any block diagrams herein represent conceptual views of illustrative methods embodying the principles of the present disclosure. Similarly, it will be appreciated that any flow charts, flow diagrams, and the like represent various processes which may be substantially represented in computer readable medium and so executed by a computer or processor, whether or not such computer or processor is explicitly shown.
DETAILED DESCRIPTION
[0019] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the invention as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
[0020] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the invention. Accordingly, it should be apparent to those skilled in the art that the following description of exemplary embodiments of the present invention are provided for illustration purpose only and not for the purpose of limiting the invention as defined by the appended claims and their equivalents.
[0021] It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a component surface” includes reference to one or more of such surfaces.
[0022] By the term “substantially” it is meant that the recited characteristic, parameter, or value need not be achieved exactly, but that deviations or variations, including for example, tolerances, measurement error, measurement accuracy limitations and other factors known to those of skill in the art, may occur in amounts that do not preclude the effect the characteristic was intended to provide.
[0023] Figures discussed below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way that would limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged communications system. The terms used to describe various embodiments are exemplary. It should be understood that these are provided to merely aid the understanding of the description, and that their use and definitions in no way limit the scope of the invention. Terms first, second, and the like are used to differentiate between objects having the same terminology and are in no way intended to represent a chronological order, unless where explicitly stated otherwise. A set is defined as a non-empty set including at least one element.
[0024] In the following description, for purpose of explanation, specific details are set forth in order to provide an understanding of the present disclosure. It will be apparent, however, to one skilled in the art that the present disclosure may be practiced without these details. One skilled in the art will recognize that embodiments of the present disclosure, some of which are described below, may be incorporated into a number of systems.
[0025] However, the systems and methods are not limited to the specific embodiments described herein. Further, structures and devices shown in the figures are illustrative of exemplary embodiments of the presently disclosure and are meant to avoid obscuring of the presently disclosure.
[0026] The various embodiments of the present disclosure describe about Multiband single compact packaged RF Jammer with multiband patch Antennas to counter mobile communication. The integrated RF transmitter aims at an approach of generating, boosting and pumping the integrated RF noise in environment in all the mobile communication Bands.
[0027] In one embodiment, the present invention discloses an integrated RF transmitter aims at an approach of generating, boosting and pumping the integrated RF noise in environment in all the mobile communication Bands with bandwidth ranging from 25MHZ to 300MHz. The RF output of this single packed assembly bares the mobile communication in particular area wherever installed.
[0028] In the present invention, the RF modules (as per table 1), supply converter and antenna are packed in single chassis with good thermal management and Inter band RF isolation. Further, the generation of spurious frequencies due to inter-band EM interference is avoided by using modular approach in Power Amplifier design.
[0029] Apart from utility system has capability to handle ambiguous situations, which makes the system more reliable and efficient in field.

Table 1
[0030] In one embodiment, the present invention attains a transmitted signal of variable bandwidth ranging from few MHz to hundreds of MHz and also expandable to wideband for future requirements with a power flatness of ±2dB over the band.
[0031] In one embodiment, a highly compact low weight design is achieved by packaging multiband patch antenna in a single package with high inter-band RF isolation between patches and good front to back ratio.
[0032] In one embodiment, more compactness to the design is achieved by merging multiple mobile communication (B40 & Wifi-2.4, GSM900 & B5) bands in single module noise booster assembly with effective jamming efficiency for both the bands.
[0033] In one embodiment, defense mechanism for Power booster failure is through auto-detection of fault and auto-restoration of system to normal working after fault correction.
[0034] In one embodiment, zero frequency gaps are achieved by using modulation scheme at baseband sweep generation.
[0035] In one embodiment, the present invention design incorporates the effective use of RF shield in such a way that RF oscillation/intra-band interference due to high and low power feedback loops, leakage b/w RF, digital and power circuitry is avoided in addition to the thermal management through proper heat transfer from amplifier.
[0036] The presented invention is generating noise in various mobile communication bands as disclosed in table 1.
[0037] Figure 1 illustrates a front view of jammer showing antenna, indicator and other utilities according to an exemplary implementation of the present disclosure.
[0038] Figure 2 illustrates a compact multiband patch antenna according to an exemplary implementation of the present disclosure.
[0039] The figure 1 illustrates a front view of jammer showing antenna, indicator and other utilities and figure 2 illustrates a compact multiband patch antenna. The generated noise with high power in required band is pumped in wireless environment through multiple antennas packaged in portable unit as shown in Figure 1. This noise superimposed with the existing low power information containing signal from nearest mobile communication trans-receiver which disable the mobile receiver to decode information. The system features to only block downlink communication between BTS and Mobile station in FDD technology. The power radiated by unit is optimized below the limit of SAR. The power is equally distributed over a large bandwidth ranging to 300MHz within specification of ±2dB. To nullify the effect of frequency blanks in frequency band modulation scheme is used.
[0040] Figure 3 illustrates a modulated baseband sweep for RF noise source to avoid frequency blank according to an exemplary implementation of the present disclosure.
[0041] Figure 4 illustrates a RF shield with intra-band isolation and thermal management according to an exemplary implementation of the present disclosure.
[0042] The figure 3 illustrates modulated baseband sweep for RF noise source to avoid any frequency blank over the Bandwidth and figure 4 illustrates a RF shield with dual use as intra-band isolation and thermal management. The endurance of system can be recognized by performance for long duration at room temperature with efficient thermal management, individual gain devices are shielded and heat sinked with proper casing as shown in figure 4 so as to avoid high feedback loop. The individual mobile band RF circuitry is properly shielded to avoid EMI interference which further increases the reliability of product. Multiple RF Modules are cascaded with multiple antennas mounted on single plate with promising isolation. Fault managements and defense mechanism against the RF module failure takes care of reflection faults due to external environment hindrance such as metallic surface near to antenna and auto restoration of system to normal functioning and thermal malfunctioning detection. In case of any faulty situation mentioned above system cutoffs the RF power thus avoiding real time failures and long run damages. This Fault management is provided individually for each RF band in the same chassis. Apart from electrical and physical aspects the portable unit is easy to deploy.
[0043] Figure 5 illustrates a pictorial representation of multiband single compact packaged RF transmitter/jammer according to an exemplary implementation of the present disclosure.
[0044] The figure illustrates a pictorial representation of multiband single compact packaged RF transmitter/jammer. As discussed above various communication bands referred in table for different mobile communication is required to block. Multiband single compact packaged RF transmitter/jammer has capability to generate all the bands.
[0045] In one embodiment, the figure illustrates the multiband single compact packaged RF transmitter/jammer (500) comprises: a plurality of noise boosters (510), wherein each of the noise booster is configured to generate, boost and pump an RF noise to a wireless environment, a plurality of antennas (520) coupled to plurality of respective noise boosters, wherein each of the antenna receives the RF noise from each of the respective noise booster and transmits the received RF noise to the wireless environment, atleast one AC-DC power supply (530) configured to provide supply power to the plurality of noise boosters, at least one thermal sensor (540) configured to maintain the proper thermal management of the system and a LED display (550) to indicate the health condition of each of the noise boosters.
[0046] To achieve the functionality of multi band, noise boosters as per respective communication bands are assembled in package and respective RF noise is being transmitted in air using multi band patch antenna. Each patch antenna (P1, P2, ….P6) is designed to achieve the required Voltage Standing Wave Ratio(VSWR) and front to back ratio in respective band. These patch antennas are mounted on a single assembly as shown in figure 5 with proper interband isolation. These passive patch antennas are connected to the respective noise boosters (Noise Booster-1, Noise Booster-2,… Noise Booster-6) via low loss RF cables (C1,C2,…C6). The noise booster is working on the electrical specifications/parameters provided by separate AC-DC conversion module. In self-defense mechanism, noise booster has internal circuitry to detect fault. Whenever fault is detected system will generate indication by changing color of dedicated noise booster LED. The system has capability to auto restore from faulty state to normal working when fault is resolved. Apart from technical faults, temperature of system is continuously monitored by temperature sensor, the increase in temperature beyond threshold will leads to temporary shutdown.
[0047] Figure 6 illustrates an individual noise booster according to an exemplary implementation of the present disclosure.
[0048] The figure illustrates an individual noise booster according to an exemplary implementation of the present disclosure. The present invention discloses the system generating noise in various mobile communication bands. It describes an analog sweep noise generated and amplified over a communication bands ranging from 25MHz to 200MHz and expandable up to 300MHz and boosting that noise such that final output is maintained over full band of 300MHz within limit of±2dB.
[0049] In one embodiment, each of the noise booster (600) comprises: at least one noise generator (610) and atleast one RF booster block (620), wherein the noise generator (610) is configured to generate the modulated RF noise and transmit the generated RF noise to the RF booster/transmitter block and the RF booster (620) receives and boosts the modulated RF noise from the noise generator (610) and transmits the boosted RF noise to the wireless environment through atleast one antenna (630).
[0050] The noise generator (610) of each of the noise boosters comprises: a TR wave generator (611) configured to generate a sweep signal at a sweep rate dependent on 3dB modulation bandwidth, a sweep modulation circuit (612) configured to generate a sweep modulation signal, a combiner (614) configured to combine sweep modulation over the sweep signal from TR wave generator (611) to nullify the generation of frequency blanks in frequency band of the sweep signal, a DC level shifter (616) configured to add a DC shift to generate range shifted sweep for predetermined mobile communication band and a RF generator (618) configured to generate RF noise corresponding to the ranged shifted sweep.
[0051] Corresponding to the sweep, the output noise sweep is generated from different noise exciters for different band with varying bandwidth using same circuit by RF generator (618). In certain blocks (with same form factor) the two mobile communication bands viz GSM&CDMA and Bluetooth /Wi-Fi 2.4 & LTE B40 are merged such that simultaneous generation of noise in the bands is maintained.
[0052] The RF booster (620) of each of the noise booster comprises: an RF booster chain (621) configured to receive the RF noise generated by the RF generator (618) through a switching logic (625) and boosts the received RF noise using a circuitry of amplifiers, RF tuning circuit of coils and capacitors, a coupler (623) configured at output and in series with the boosted RF noise receives and forwards the boosted RF noise to atleast one antenna (630) and further configured to sample the boosted RF noise, a health and fault detection chain (624) configured to receive the sample RF noise from the coupler (623) and digitalizes the sampled forward and reverse RF signals, the switching logic (625) is configured to Power ON the RF booster chains according to the digitalized forward and received RF signals from the health and fault detection chain (624) and send the system status to LED display and a DC-DC power (626) supply configured to provide power/supply to the noise booster (600).
[0053] In the present invention, the noise generated from the RF generator is boosted in wide band RF booster chain using an amplifier with matching circuitry of coils and capacitors. The RF output level is maintained over full communication band (bandwidth ranging from 25MHZ to 300MHz) to a flatness of ± 2dB for both the single communication band and merged bands with same efficiency. The output power is transmitted through Multiband patch antenna to the environment via RF cables connected b/w noise booster module and also the final output of the booster chain is sampled through coupler to forward and reflected path in the booster. [021] The sampled forward, and reverse power is digitalized and compared to the reference values. The digitalized forward value is electronically used as a health status at front panel to indicate the for proper working of system. The digitalized reflected power when reaches beyond the specified reference level to maintain proper working of RF booster chain, activates the switch and logic circuitry (625) and shutdown the noise generation and boosting of RF noise which in turn results in no forward power and hence failure indication. This defense mechanism is such that on correction of fault (for e.g. removal of object placed in front of antenna) the system is automatically restored without any manual reset/ intervention. The supply to each block of the Rf noise booster and RF noise generator is provided by DC-DC converter (626). Different such noise booster using same base circuitry with different matching circuitry of coils and capacitors generates boosted RF noise in all mobile communication bands which are pumped into the environment through multiple antennas packaged in portable unit as shown in Figure 5. Also, in case of thermal malfunctioning the main power supply to all the blocks is shut down by feedback loop which is auto-restored after cools down.
[0054] The jammer is compact and portable by incorporating plurality of noise boosters (510) and plurality of antennas (520) as a single unit, and blocks only the downlink communication between BTS and Mobile station. Each of the noise boosters generates, boosts and pumps at least one RF noise in the wireless environment in all the mobile communication bands having bandwidth ranging from 25MHZ to 300MHz. The circuits/elements of the noise generator and RF booster /transmitter block of each of the noise boosters are shielded and isolated to avoid EMI/EMC interference. The plurality of noise boosters and plurality of antennas are cascaded on single plate with isolation. The plurality of antennas are coupled to plurality of respective noise boosters through RF cables. The jammer is configured to auto-detect fault and auto-restore to fault correction. The jammer provides multiple RF noise signals simultaneously through the plurality of noise boosters.
[0055] This noise superimposed with the existing low power information containing signal from nearest mobile communication trans-receiver which disable the mobile receiver to decode information. The system features to only block downlink communication b/w BTS and Mobile station in FDD technology. The power radiated by unit is optimized below the limit of SAR. The power is equally distributed over a large bandwidth ranging to 300MHz within specification of ±2dB..Endurance of system can be recognized by performance for long duration at RT with efficient thermal management, Individual Gain devices are shielded and heat sinked with proper casing as shown in figure 3 so as to avoid high power feedback loop. The System is portable and light in weight. The individual mobile band RF circuitry is properly shielded to avoid EMI/EMC interference which further increases the reliability of product. Multiple RF Modules are cascaded with multiple antennas mounted on single plate with promising isolation. This modular approach reduces the MTTR and increases system availability. Fault managements and defense mechanism explained above against the RF module failure takes care of reflection faults due to external environment hindrance such as metallic surface near to antenna and auto restoration of system to normal functioning and thermal malfunctioning detection. In case of any faulty situation mentioned above system cutoffs the RF power thus avoiding real time failures and long run damages. This Fault management is provided individually for each RF band in the same chassis. Apart from electrical and physical aspects the portable unit is easy to deploy.
[0056] Figures are merely representational and are not drawn to scale. Certain portions thereof may be exaggerated, while others may be minimized. Figures illustrate various embodiments of the invention that can be understood and appropriately carried out by those of ordinary skill in the art.
[0057] In the foregoing detailed description of embodiments of the invention, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the invention require more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive subject matter lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description of embodiments of the invention, with each claim standing on its own as a separate embodiment.
[0058] It is understood that the above description is intended to be illustrative, and not restrictive. It is intended to cover all alternatives, modifications and equivalents as may be included within the spirit and scope of the invention as defined in the appended claims. Many other embodiments will be apparent to those of skill in the art upon reviewing the above description. The scope of the invention should, therefore, be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. In the appended claims, the terms “including” and “in which” are used as the plain-English equivalents of the respective terms “comprising” and “wherein,” respectively.
,CLAIMS:We Claim:

1. A multiband RF jammer (500), the jammer comprising:
a plurality of noise boosters (510), wherein each of the noise booster is configured to generate, boost and pump an RF noise to a wireless environment;
a plurality of antennas (520) coupled to plurality of respective noise boosters, wherein each of the antenna receives the RF noise from each of the respective noise booster and transmits the received RF noise to the wireless environment;
atleast one AC-DC power supply (530) configured to provide power to the plurality of noise boosters;
at least one thermal sensor (540) configured to maintain the proper thermal management; and
a LED display (550) to indicate health condition of each of the noise boosters.

2. The jammer as claimed in claim 1, wherein each of the noise booster (600) comprises:
at least one noise generator (610) and atleast one RF booster (620), wherein the noise generator (610) is configured to generate the RF noise;
the atleast one RF booster (620) receives and boosts the RF noise from the noise generator (610) and transmits the boosted RF noise to the wireless environment through atleast one antenna (630).

3. The jammer as claimed in claim 2, wherein the noise generator (610) of each of the noise boosters comprises:
a TR wave generator (611) configured to generate a sweep signal at a sweep rate dependent on 3dB modulation bandwidth;
a sweep modulation circuit (612) configured to generate a sweep modulation signal;
a combiner (614) configured to combine sweep modulation over the sweep signal from TR wave generator (611) to nullify the generation of frequency blanks in frequency band of the sweep signal;
a DC level shifter (616) configured to add a DC shift to generate range shifted sweep for predetermined mobile communication band; and
a RF generator (618) configured to generate RF noise corresponding to the ranged shifted sweep.

4. The jammer as claimed in claim 2, wherein the RF booster (620) of each of the noise booster comprises:
an RF booster chain (621) configured to receive the RF noise generated by the RF generator (618) through a switching logic (625) and boosts the received RF noise using a circuitry of amplifiers, coils and capacitors;
a coupler (623) configured to receive the boosted RF noise and transmits the boosted RF noise to atleast one antenna (630) and further configured to sample the boosted RF noise;
a health and fault detection chain (624) configured to receive the sample RF noise from the coupler (623) and digitalizes the sampled forward and reverse RF signals;
the switching logic (625) is configured to power “ON” the RF booster chain based on the digitalized forward and received RF signals from the health and fault detection chain (624) and sends the system status to LED display;
a DC-DC power (626) supply configured to provide power/supply to the noise booster (600).

5. The jammer as claimed in claim 1, wherein the jammer is compact and portable by incorporating plurality of noise boosters (510) and plurality of antennas (520) as a single unit, and blocks only the downlink communication between BTS and Mobile station.

6. The jammer as claimed in claim 1, wherein each noise boosters generates, boosts and pumps at least one RF noise in the wireless environment in all the mobile communication bands having bandwidth ranging from 25MHZ to 300MHz.

7. The jammer as claimed in claim 1, wherein the circuits/elements of the noise generator and RF booster of each of the noise boosters are shielded and isolated to avoid EMI/EMC interference.

8. The jammer as claimed in claim 1, wherein the plurality of noise boosters and plurality of antennas are cascaded on single plate with isolation and good front to back ratio.

9. The jammer as claimed in claim 1, wherein the plurality of antennas are coupled to plurality of respective noise boosters through RF cables.

10. The jammer as claimed in claim 1, wherein the jammer is configured to auto-detect fault and auto-restore to fault correction.

11. The jammer as claimed in claim 1, wherein the jammer provides multiple RF noise signals simultaneously through the plurality of noise boosters.

Dated this 23rd day of March, 2020

FOR BHARAT ELECTRONICS LIMITED
By their Agent)

D. MANOJ KUMAR (IN/PA-2110)
KRISHNA & SAURASTRI ASSOCIATES LLP