Navigation interference equipment and system for resisting multi-array element nulling antenna

Abstract

The embodiment of the invention provides navigation interference equipment and a navigation interference system for resisting a multi-array-element zeroing antenna. The navigation interference device comprises a power supply module, a communication control module and an interference signal module. The power supply module is electrically connected with the communication control module and the interference signal module and is used for supplying power to the communication control module and the interference signal module. The communication control module is electrically connected with the interference signal module and is used for sending control parameters to the interference signal module; and the interference signal module is used for generating a same-frequency-band multi-channel interference signal according to the control parameters and radiating the same-frequency-band multi-channel interference signal to the target to be interfered so as to interfere the navigation frequency band of the target to be interfered. By utilizing the navigation interference equipment disclosed by the invention, the countermeasure capability of the multi-array element zeroing antenna aiming at the target to be interfered is obviously improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of navigation jamming electronic countermeasures, in particular to a navigation jamming device for countering multi-element zero antenna and a navigation jamming system. BACKGROUND

[0002] In navigation jamming electronic countermeasures, a navigation receiver based on spatial filtering and beamforming technology can form signal suppression (i.e., null) in the direction of interference by adjusting the radiation pattern of the array antenna, thereby effectively suppressing the interference signal and improving the reliability and stability of the navigation system, and having strong navigation frequency point anti-wideband interference function.

[0003] In related art, the navigation jamming device has limited countermeasures or too high success rate in countering multi-element zero antenna. For example, some navigation jamming devices only have anti-multi-element zero antenna capability for a single navigation frequency point, so when the interference object receiver has a multi-element zero antenna, the interference countermeasure effect is not ideal. For another example, some navigation jamming devices emit high-intensity jamming signals at multiple navigation frequency bands at the same time, with power up to several kilowatts or even higher, which achieves certain countermeasure results, but the cost is high and is not conducive to large-scale application. SUMMARY

[0004] To at least solve one of the above technical problems, the present disclosure provides a navigation jamming device for countering multi-element zero antenna and a navigation jamming system.

[0005] According to a first aspect of the present disclosure, a navigation jamming device for countering multi-element zero antenna is provided, wherein the navigation jamming device comprises a power supply module, a communication control module and a jamming signal module;

[0006] The power supply module is electrically connected to the communication control module and the jamming signal module, respectively, to supply power to the communication control module and the jamming signal module, respectively;

[0007] The communication control module is electrically connected to the jamming signal module to send control parameters to the jamming signal module; wherein the control parameters are issued by a superior control device in communication connection with the communication control module, and the control parameters include interference signal frequency band, preset signal frequency hopping sequence, preset signal modulation mode and target direction to be jammed, and the target to be jammed is a navigation receiving device with multi-element zero antenna;

[0008] The interference signal module is configured to generate same-frequency-band multi-channel interference signals according to the control parameters, and radiate the same-frequency-band multi-channel interference signals to the target to be interfered, so as to interfere with the navigation frequency band of the target to be interfered; and the same-frequency-band multi-channel interference signals do not interfere with each other.

[0009] According to a second aspect of the embodiments of the present disclosure, a navigation interference system for countering a multi-element zero antenna is provided, wherein the navigation interference system comprises at least two navigation interference devices and a superior control device,

[0010] The navigation interference device is the navigation interference device as described in the present disclosure.

[0011] The at least two navigation interference devices are configured to be distributed around the target to be interfered to form an interference network; and the target to be interfered is a navigation receiving device with a multi-element zero antenna.

[0012] The superior control device is configured to send a corresponding control parameter to each of the at least two navigation interference devices, so that each of the navigation interference devices radiates a same-frequency-band multi-channel interference signal to the target to be interfered; and the same-frequency-band multi-channel interference signal can interfere with the navigation frequency band of the target to be interfered.

[0013] As described above, by using the navigation interference device for countering a multi-element zero antenna provided by the embodiments of the present disclosure, a multi-frequency-band interference signal output can be realized through a same-frequency-band multi-channel structure; the processing difficulty of the zero antenna of the target to be interfered is increased and the anti-interference ability thereof is reduced through frequency hopping interference; a high-power suppression interference output is realized through a power amplifier unit and an antenna assembly, so as to ensure a high effective radiation power of the interference signal of the device; the device is remotely controlled through a communication control device, is powered through a UPS and an oil engine, and meets the requirement of flexible distributed deployment; the interference frequency, interference bandwidth, interference pattern, interference direction, and interference power of each navigation interference device are individually controlled through the distributed deployment to form a cooperative interference, so as to strive for a better anti-zero antenna interference effect; the target to be interfered is followed and tracked through a servo assembly and a positioning and orientation assembly in combination with target guiding information sent by the superior control device.

[0014] In summary, the navigation interference device for countering a multi-element zero antenna provided by the embodiments of the present disclosure has a multi-dimensional structural design, the countering ability of the multi-element zero antenna of the target to be interfered is significantly improved, and the implementation cost of the scheme is controllable, so that the device can be conveniently deployed on a large scale. BRIEF DESCRIPTION OF DRAWINGS

[0015] The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which:

[0016] Figure 1 is a structural schematic diagram of a navigation jamming device for countering a multi-element zero antenna provided by an example embodiment of the present disclosure;

[0017] Figure 2 is a structural schematic diagram of a jamming signal module provided by an example embodiment of the present disclosure;

[0018] Figure 3 is a structural schematic diagram of a signal generation unit provided by an example embodiment of the present disclosure;

[0019] Figure 4 is a structural schematic diagram of a power amplifier unit provided by an example embodiment of the present disclosure;

[0020] Figure 5 is a specific structural schematic diagram of a navigation jamming device for countering a multi-element zero antenna provided by an example embodiment of the present disclosure;

[0021] Figure 6 is a structural schematic diagram of a navigation jamming system for countering a multi-element zero antenna provided by an example embodiment of the present disclosure;

[0022] Figure 7 is a working flow schematic diagram of a navigation jamming device for countering a multi-element zero antenna provided by an example embodiment of the present disclosure. DETAILED DESCRIPTION

[0023] The present disclosure will be further described with reference to the drawings shown in the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments of the present disclosure, and it should be understood that the present disclosure is not limited to the example embodiments described herein.

[0024] It should be noted that: unless otherwise specifically stated, the relative arrangement, numerical expressions and values of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0025] Those skilled in the art can understand that the terms "first", "second" and the like in the embodiments of the present disclosure are only used to distinguish different steps, devices or modules, and do not represent any specific technical meaning, nor do they represent the inherent logical order between them.

[0026] It should also be understood that, in the embodiments of the present disclosure, "multiple" can refer to two or more, and "at least one" can refer to one, two or more.

[0027] It should also be understood that, for any component, data or structure mentioned in the embodiments of the present disclosure, one or more can be generally understood without explicit limitation or in the context of the opposite implications given by the preceding and following texts.

[0028] In addition, the term "and / or" in the present disclosure is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present disclosure generally represents that the front and rear associated objects have an "or" relationship.

[0029] It should also be understood that the description of the embodiments of the present disclosure emphasizes the differences between the embodiments, and the same or similar parts can be referred to each other, and for the sake of brevity, they will not be repeated.

[0030] At the same time, it should be understood that, for the convenience of description, the size of each part shown in the drawings is not drawn according to the actual proportional relationship.

[0031] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application or uses.

[0032] The techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but in appropriate cases, the techniques, methods, and devices should be considered as part of the specification.

[0033] It should be noted that: similar signs and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings.

[0034] Embodiment 1:

[0035] Figure 1 is a structural schematic diagram of a navigation jamming device for resisting multi-element zero antenna provided by an exemplary embodiment of the present disclosure.

[0036] Specifically, with reference to Figure 1 , the navigation jamming device 1 comprises a power supply module 110, a communication control module 120 and a jamming signal module 130.

[0037] With reference to Figure 1 , the power supply module 110 is electrically connected with the communication control module 120 and the jamming signal module 130 respectively, so as to supply power to the communication control module 120 and the jamming signal module 130 respectively.

[0038] Referring to Figure 1 The communication control module 120 is electrically connected to the interference signal module 130 for sending control parameters to the interference signal module 130.

[0039] The control parameters are issued by a superior management and control device in communication connection with the communication control module 120, and the control parameters include an interference signal frequency band, a preset signal frequency hopping sequence, a preset signal modulation mode, and a to-be-interfered target direction.

[0040] The to-be-interfered target is a navigation receiving device with a multi-element zero antenna.

[0041] To ensure the interference function, interference performance, and ability to counter the zero antenna of the navigation interference device in the embodiments of the present disclosure, in an optional example, the interference signal radiated by the navigation interference device includes two interference frequency bands (i.e., two interference signal frequency bands), to ensure the signal interference and signal suppression ability for each navigation frequency band in the Global Navigation Satellite System (GNSS). The GNSS includes the Global Positioning System (GPS), the GLONASS satellite navigation system, the Beidou satellite navigation system (BDS), and the Galileo satellite navigation system.

[0042] Specifically, the navigation frequency point distribution of the GNSS is shown in Table 1.

[0043] Table 1 Navigation frequency point distribution of the GNSS

[0044]

[0045] In the embodiments of the present disclosure, the navigation interference device supports two interference frequency bands, and the coverage of the navigation frequency points shown in Table 1 is as follows:

[0046] 1) The first suppression frequency band covers the 1.5 GHz-1.7 GHz frequency band (i.e., the first interference frequency band), mainly for the BDS B1I, B1C, GPS L1C / A, L1C, GLONASS L1, Galileo E1 OS, and other navigation frequency bands. The specific coverage frequency point distribution is shown in Table 2.

[0047] Table 2 Coverage frequency point distribution of the first interference frequency band

[0048]

[0049] Referring to Table 2, according to calculation, the interference output bandwidth of 46.8855 MHz can cover the frequency points, and the center frequency point selected at 1582.495±23.44275 MHz can cover the frequency points in Table 2. The first suppression frequency band 1.5GHz-1.7GHz in the embodiment completely covers the navigation frequency bands shown in Table 2.

[0050] 2) The second suppression frequency band covers the frequency band of 1.1GHz-1.3GHz (i.e., the second interference frequency band), mainly aiming at the navigation frequency bands of BDS B3I, BDS B2I, GLONASS L2, etc. The specific coverage frequency point distribution is shown in Table 3.

[0051] Table 3 shows the coverage frequency point distribution of the second interference frequency band

[0052]

[0053] Referring to Table 3, according to calculation, the bandwidth required by the two frequency points of BDS B3I and GLONASS L2 is 35.8125 MHz, and the center frequency point selected at 1260.84375±17.90625 MHz can cover the frequency points in Table 3. The bandwidth of BDS B2I is 20.46 MHz, and the center frequency point selected at 1207.14±10.23 MHz can cover the frequency points. The second suppression frequency band 1.1GHz-1.3GHz in the embodiment completely covers the navigation frequency bands shown in Table 3.

[0054] Referring to Figure 1 The interference signal module is configured to generate same-frequency-band multi-channel interference signals according to the control parameters, and radiate the same-frequency-band multi-channel interference signals to the target to be interfered, so as to interfere with the navigation frequency band of the target to be interfered.

[0055] The same-frequency-band multi-channel interference signals do not interfere with each other.

[0056] Optionally, when the interference signal frequency band includes a first interference frequency band and a second interference frequency band, the frequency band of the same-frequency-band multi-channel interference signal also includes the first interference frequency band and the second interference frequency band; the frequency range of the first interference frequency band is 1.5GHz-1.7GHz; and the frequency range of the second interference frequency band is 1.1GHz-1.3GHz.

[0057] As described above, the navigation jamming device for the multi-element zero antenna provided by the embodiments of the present disclosure can cover the navigation frequency points of the GNSS by supporting two jamming frequency bands, thereby enhancing the frequency band coverage capability for the target to be jammed to a certain extent. On the other hand, by outputting the same frequency band multi-channel jamming signal, multi-source jamming to the target to be jammed can be realized, thereby enhancing the suppression effect of the jamming signal.

[0058] Embodiment 2:

[0059] Based on the above embodiment, as an optional implementation, the jamming signal module includes four independent signal generation links. Each independent signal generation link corresponds to one jamming signal channel.

[0060] Based on the above optional implementation, as an optional example, the same frequency band multi-channel jamming signal is a same frequency band four-channel jamming signal.

[0061] As an optional example, referring to Figure 2 Each independent signal generation link includes a signal generation unit, a power amplifier unit, a gating switch and an antenna assembly connected in sequence.

[0062] The signal generation unit is configured to generate a jamming source signal. That is, referring to Figure 2 The signal generation unit can be used as a signal source and a modulation core. Details about the modulation core will be described below.

[0063] The power amplifier unit is configured to amplify the jamming source signal to obtain an amplified jamming signal. Referring to Figure 2 The main functions of the power amplifier unit are power amplification and impedance matching.

[0064] The gating switch is configured to, when the working state of the power amplifier unit is normal, select to communicate the power amplifier unit with the antenna assembly, so that the amplified jamming signal is radiated to the target to be jammed via the antenna assembly. The gating switch is also configured to, when the working state of the power amplifier unit is abnormal, select to disconnect the power amplifier unit from the antenna assembly.

[0065] Here, the gating switch functions as a "power amplifier output isolator" to protect the antenna assembly from being damaged by abnormal signals,

[0066] Referring to Figure 2 The antenna assembly functions as a radiation device, and when communicating with the power amplifier unit, can realize omnidirectional or directional electromagnetic wave radiation, thereby realizing signal jamming to the target to be jammed.

[0067] It should be noted that the multi-channel interference described in the above embodiment is an effective means to achieve efficient electromagnetic suppression. In order to ensure superior ability to counter multi-element zero antenna, the two interference frequency bands described in the embodiment include 1.1GHz-1.3GHz and 1.5GHz-1.7GHz, and a "same frequency band-multi-channel" architecture is adopted. Four completely independent signal production links are integrated in a single interference frequency band to achieve physical isolation at the hardware level. At the tactical application level, the four digital radio frequency channels (DRFM) configured for each interference frequency band use staggered pulse modulation based on the orthogonal frequency division multiplexing principle in the time domain, and load different interference patterns respectively, thereby ensuring spectral efficiency while avoiding intermodulation interference. When the navigation interference device suppresses interference output in the same frequency band, it can form four independent interference sources for each navigation frequency band, that is, each set of device performs 4-source interference on a specific navigation frequency band, thereby improving the interference effect to a certain extent.

[0068] On the basis of the above embodiment, as an optional implementation manner, referring to Figure 3 , the signal generation unit includes a digital baseband generator, a frequency synthesizer, and a signal modulator connected in communication.

[0069] Optionally, the digital baseband generator is configured to generate a baseband signal according to the interference signal frequency band. The interference signal frequency band includes a 1.1GHz-1.3GHz frequency band and a 1.5GHz-1.7GHz frequency band.

[0070] Optionally, the frequency synthesizer is configured to adjust the carrier frequency of the baseband signal in sequence according to the preset signal frequency hopping sequence to obtain a frequency hopping signal.

[0071] It should be noted that the carrier frequency of the baseband signal can be quickly changed by frequency hopping, and the obtained interference signal (i.e., the hopping signal) is quickly switched at multiple frequency points. This rapid hopping makes it difficult for the zero antenna of the target to be interfered to track and adjust the pattern in real time, thereby reducing the zeroing effect.

[0072] The underlying implementation principle of this example includes: coding the frequency hopping strategy based on "digital signal processing technology" into the frequency synthesizer; so that the frequency synthesizer can generate a high-precision frequency hopping signal according to the preset frequency hopping sequence.

[0073] Optionally, the signal modulator is configured to modulate the baseband signal according to the preset signal modulation mode to obtain a modulated signal. The preset signal modulation mode includes amplitude modulation AM, frequency modulation FM, phase shift keying modulation PSK, and quadrature amplitude modulation QAM.

[0074] The interference source signal includes the frequency hopping signal and / or the modulated signal.

[0075] It should be noted that in addition to the aforementioned frequency hopping means, modulation mode hopping is also a key means of interference. In the present alternative example, by using different modulation modes (e.g. AM, FM, PSK, QAM, etc.) on different frequencies, the characteristics of the interference signal are more complex, thereby further increasing the processing difficulty of the nulling antenna of the target to be interfered.

[0076] Considering the technical feature that the nulling antenna of the target to be interfered adjusts the weights dynamically to form a "null point" in the direction of the interference signal. In the alternative embodiment described above, the interference means of frequency hopping and modulation mode hopping can significantly reduce the anti-interference ability of the nulling antenna of the target to be interfered.

[0077] In addition, in a multi-node interference environment, multiple interference sources work cooperatively, and through unified scheduling of each interference source by a central control node, synchronous transmission and cooperative hopping of the interference signal can be realized, so that the interference signal can form a resultant force and enhance the interference effect.

[0078] On the basis of the above embodiments, as an alternative embodiment, with reference to Figure 4 , the power amplifier unit includes a state detection device and a cascade of four-stage amplifiers (i.e. as shown in Figure 4 , the first-stage amplifier, the second-stage amplifier, the third-stage amplifier, and the fourth-stage amplifier).

[0079] Optionally, the state detection device is configured to detect the working state of the four-stage amplifier, wherein the working state includes normal and abnormal.

[0080] Optionally, each stage of the four-stage amplifier includes a single-channel radio frequency amplification circuit.

[0081] With reference to Figure 4 , the power amplifier unit adopts a single-channel radio frequency amplification design, and uses a four-stage amplifier to amplify and output the input signal (wherein microstrip line impedance matching technology is used for input and output), thereby ensuring that the output power of the single-channel final-stage power tube of the amplifier can be greater than 57dBm in the interference signal frequency band of 1.1GHz-1.3GHz and 1.5GHz-1.7GHz.

[0082] As an alternative example, the final-stage (i.e. the fourth-stage amplifier) amplifier can use GaN power tubes, and use two power tubes for power synthesis.

[0083] In addition, in order to ensure stable operation of the power amplifier (i.e., to avoid damage in use), a state detection and protection circuit can be added inside the power amplifier unit. The protection circuit includes temperature protection and overcurrent protection; wherein the temperature protection is used to protect against damage caused by excessively high operating temperature of the radio frequency tube; and the overcurrent protection is used to protect against damage caused by abnormal current when each channel of the power amplifier is used excessively.

[0084] With reference to Figure 4 The state detection device can monitor the first to fourth amplifiers in parallel. The internal detection points of each amplifier can include power supply / bias, temperature, current, and resistance in the input matching network and the output matching network.

[0085] In the above embodiment, in order to amplify the "interference source signal" and ensure that the interference power meets the index requirements, the power amplifier unit is used as a front-stage amplification circuit to amplify the "interference source signal" and output it to the antenna assembly. The antenna assembly uses multiple spiral antennas to improve the antenna gain. Each channel passes through the front-stage power amplifier and the final-stage power amplifier (in this example, a total of 1 to 4 amplification circuits), and the power of the antenna is combined in space to achieve the required equivalent radiation power.

[0086] Based on the above embodiment, as an optional embodiment, the antenna assembly includes two spiral antennas; wherein the polarization mode of the spiral antennas is circular polarization.

[0087] It should be noted that the antenna assembly uses two spiral antennas to form an array, which doubles the channel gain and thus improves the power pressure on the target to be interfered.

[0088] Embodiment 3:

[0089] Based on the above embodiment, as an optional embodiment, the interference signal module further includes a servo turntable. The servo turntable is used to rotate according to the azimuth adjustment amount, so that the radiation azimuth angle of the antenna assembly carried on the bearing surface of the servo turntable covers the target to be interfered. Wherein the azimuth adjustment amount is determined by the communication control module and sent to the servo turntable.

[0090] Optionally, the servo turntable can be driven by a heavy-duty two-dimensional servo motor, which can support network control. The servo turntable can realize horizontal 360-degree barrier-free rotation and 90-degree barrier-free rotation in pitch; thus, when the servo turntable carries the antenna assembly, it can drive the antenna assembly to rotate to meet the requirements of accurate and controllable output of the azimuth angle of the interference signal.

[0091] As an optional embodiment, the communication control module includes a positioning and orientation assembly, a communication control device, and a switch connected in communication. The positioning and orientation assembly is used to determine its own position according to the acquired satellite navigation information.Figure 5 The positioning and orientation assembly can complete high-precision orientation services with the support of the antenna. In addition, the positioning and orientation assembly can also support speed measurement and time service.

[0092] Optionally, the communication control device is configured to determine the azimuth adjustment amount based on the self-positioning and the target position to be interfered, and transmit the azimuth adjustment amount to the servo turntable via the signal generation unit.

[0093] Optionally, the communication control device is further configured to transmit the interference signal frequency band, the preset signal frequency hopping sequence, and the preset signal modulation mode to the switch; and the switch is configured to transmit the interference signal frequency band, the preset signal frequency hopping sequence, and the preset signal modulation mode to the signal generation unit, and / or collect the working state information of the signal generation unit and the servo turntable.

[0094] As described in the above embodiments, under the support of the servo turntable and the positioning and orientation assembly, the navigation jamming device can follow the target guidance information (i.e., the target position to be interfered) issued by the upper-level control device to perform tracking interference, thereby greatly enhancing the interference effectiveness.

[0095] As an optional embodiment, the power module includes a direct current storage unit and an alternating current power supply unit. Referring to Figure 5 The direct current storage unit has an output (direct current) voltage of 12V and an input (alternating current) voltage of 220V. The alternating current power supply unit is an uninterruptible power supply (UPS). The UPS is an uninterrupted power supply system including an energy storage device and an inverter as the core component. Its core function is to provide stable and continuous power support for the load, especially when the power supply is abnormal or interrupted. Specifically, when the power supply is normal, the UPS supplies power after voltage stabilization and charges the built-in battery at the same time; when the power supply is interrupted, the UPS switches to battery power within 0 milliseconds to 10 milliseconds, outputs 220V alternating current through the inverter, and ensures the continuous operation of the load.

[0096] Optionally, referring to Figure 5 The alternating current power supply unit (i.e., the UPS) is configured to provide alternating current to the direct current storage unit (i.e., the power supply). The alternating current power supply unit (i.e., the UPS) takes the power grid (i.e., the power supply) or a generator set (e.g., an "oil engine" generator) as the power source.

[0097] Optionally, referring to Figure 5The direct current storage unit (i.e., power supply) is used to convert alternating current into direct current and provide direct current to the servo turntable, the switch, the communication control device and the positioning and orientation assembly respectively; wherein the voltage of the direct current power supply is 12V.

[0098] The switch is further used to collect the working states of the direct current storage unit, the alternating current power supply unit and the generator set.

[0099] The following refers to Figure 5 An exemplary overview of the overall structure of the navigation jamming device is provided as follows:

[0100] It should be first noted that Figure 5 The structure of the navigation jamming device described in the embodiments of the present disclosure is only a schematic diagram and does not constitute a limitation.

[0101] The navigation jamming device includes a power module, a communication control module and a jamming signal module.

[0102] Specifically, referring to Figure 5 , the power module includes a power supply and a UPS power supply. The UPS power supply is used to supply 220V alternating current to the power supply. The UPS power supply can be powered by an oil machine (i.e., an oil machine generator set, such as an oil pumping machine generator set) or a city power supply; the city power supply and the oil machine provide 220V alternating current to the UPS power supply.

[0103] Continuing to refer to Figure 5 , the communication control module includes a switch, a communication control device, a communication antenna connected to the communication control device, a positioning and orientation assembly and an antenna connected thereto.

[0104] Continuing to refer to Figure 5 , the jamming signal module includes a servo turntable, a jamming source unit (i.e., the "signal generation unit" described in the foregoing embodiments of the present disclosure) and multiple independent signal generation links extended from the jamming source unit. In Figure 5 , the independent signal generation link includes a "power amplifier, a gate switch, an omnidirectional antenna or a directional antenna". It should be noted that in the example of the present disclosure, each link corresponds to an independent jamming source unit, Figure 5 In order to clearly show the structural relationship between the modules (reduce complexity), the independent "jamming source units" of the multiple independent signal generation links are combined into one "jamming source unit". In addition, Figure 5 contains 8 independent signal generation links (i.e., Figure 5The interference channels 1-8 shown are actually for the purpose of illustrating that the interference signal module can support 2 interference frequency bands (i.e. the aforementioned 1.5GHz-1.7GHz, 1.1GHz-1.3GHz), each of which corresponds to 4 links. In the actual application stage, the interference signal module in a navigation jamming device outputs 4 interference signals based on one of the 2 interference frequency bands.

[0105] With reference to Figure 5 The power supply respectively supplies DC 12V voltage to the servo motor, the switch, the interference source unit and the communication control device; the switch can also provide 12V DC to the communication control device as a redundant power supply to enhance power stability.

[0106] With reference to Figure 5 The above modules communicate with each other based on the RJ45 and RS232 interface protocols. Among them, the RJ45 interface is mainly used as a physical interface for device monitoring or data transmission, and the signal indicators involved are similar to the performance parameters in network communication. RS232 is a serial communication interface standard based on single-ended signal transmission, mainly used for short-distance data transmission and control between devices.

[0107] With reference to Figure 6 For example, the communication control device can send the "azimuth adjustment amount" to the interference source unit based on the RS232 interface, and then the interference source unit sends the "azimuth adjustment amount" to the servo turntable based on the RS232 interface.

[0108] For another example, the communication control device can send the "interference signal frequency band, preset signal frequency hopping sequence, preset signal modulation mode" to the switch based on the RJ45 interface, and then the switch sends the "interference signal frequency band, preset signal frequency hopping sequence, preset signal modulation mode" to the servo turntable based on the RJ45 interface; finally, the servo turntable sends the "interference signal frequency band, preset signal frequency hopping sequence, preset signal modulation mode" to the interference source unit based on the RJ45 interface.

[0109] The servo motor can also collect the working state parameters of the servo turntable, the interference source unit, the oil machine, the UPS power supply and the power supply based on the RJ45 interface, and feed them back to the communication control device after summarizing.

[0110] The communication control device can communicate with the upper-level control device through the communication antenna, receive the instructions remotely issued by the upper-level control device, including the aforementioned interference signal frequency band, preset signal frequency hopping sequence, preset signal modulation mode, target azimuth to be jammed, and control instructions for soft start and stop power supply. The switch can start and stop the UPS power supply according to the soft start and stop instructions.

[0111] The communication control device further has a device display control interface, supports communication with the communication control device through a display control device, and thus realizes the issuing of control instructions.

[0112] As described above, the navigation jamming device for countering multi-element zero antenna provided by the embodiments of the present disclosure can realize simultaneous multi-band jamming signal output through the "same frequency band-multi-channel" structure, increase the processing difficulty of the zero antenna of the target to be jammed through frequency hopping jamming, and reduce the anti-jamming capability thereof; high-power suppression jamming output is realized through the power amplifier unit and the antenna assembly, so as to ensure the high effective radiation power of the device jamming signal; the device realizes remote control through the communication control device, meets the flexible distributed deployment requirement through UPS and oil engine power supply, controls the jamming frequency, jamming bandwidth, jamming pattern, jamming direction, jamming power, etc. of each navigation jamming device individually through distributed deployment, forms cooperative jamming, and strives for better anti-zero antenna jamming effect; through the servo assembly and the positioning and orientation assembly, the target to be jammed can be followed and tracked through the target guiding information issued by the upper control device.

[0113] In summary, the navigation jamming device for countering multi-element zero antenna provided by the embodiments of the present disclosure has a multi-dimensional structural design, the countering capability of the multi-element zero antenna of the target to be jammed is significantly improved, and the implementation cost of the scheme is controllable, so that the device can be conveniently deployed on a large scale.

[0114] Embodiment 4:

[0115] On the basis of the above-mentioned embodiments, the present disclosure provides a navigation jamming system for countering multi-element zero antenna, which comprises at least two navigation jamming devices and an upper control device.

[0116] The navigation jamming device is the navigation jamming device described in the foregoing embodiments of the present disclosure;

[0117] The at least two navigation jamming devices are distributedly arranged around the target to be jammed to form an interference network; wherein the target to be jammed is a navigation receiving device with a multi-element zero antenna;

[0118] The upper control device is configured to send corresponding control parameters to each of the at least two navigation jamming devices, so that each of the navigation jamming devices radiates a same frequency band multi-channel jamming signal to the target to be jammed; wherein the same frequency band multi-channel jamming signal can interfere with the navigation frequency band of the target to be jammed.

[0119] Reference Figure 6In an example, the navigation jamming device includes a UPS power supply, which can be powered by an oil engine, thus enabling flexible distributed deployment as described above. Through distributed deployment, multiple jamming sources are used to simultaneously jam the null-steering antenna receiver of the target to be jammed. These jamming sources can be distributed at different locations and transmit jamming signals of different frequencies and modulation modes. Since a single jamming source has limited number and depth of nulls to suppress the null-steering antenna, multiple jamming sources from different directions and frequencies can make it difficult for the antenna of the target to be jammed to form effective nulls to all jamming sources at the same time, thus destroying the anti-jamming capability of the antenna.

[0120] Optionally, referring to Figure 7 , the navigation jamming system includes four navigation jamming devices, i.e., navigation jamming devices 1-4. The navigation jamming devices 1-4 are distributed around the target to be jammed in a distributed manner, covering 360° azimuth and forming a jamming network; under the unified coordination of the upper control device, the jamming network outputs jamming signals of different azimuths (as shown by the rays extending from the navigation jamming devices in Figure 5 ), which are interwoven with each other, making it difficult for the null-steering antenna of the target to be jammed to accurately adjust the weights of the array elements and form effective nulls in all jamming directions.

[0121] Embodiment 5:

[0122] Based on the above embodiments, referring to ​ , the working process of the navigation jamming device in an example is as follows: ​ In an example, the navigation jamming device includes a UPS power supply, which can be powered by an oil engine, thus enabling flexible distributed deployment as described above. Through distributed deployment, multiple jamming sources are used to simultaneously jam the null-steering antenna receiver of the target to be jammed. These jamming sources can be distributed at different locations and transmit jamming signals of different frequencies and modulation modes. Since a single jamming source has limited number and depth of nulls to suppress the null-steering antenna, multiple jamming sources from different directions and frequencies can make it difficult for the antenna of the target to be jammed to form effective nulls to all jamming sources at the same time, thus destroying the anti-jamming capability of the antenna.

[0123] S1, the positioning antenna receives the navigation signal sent by the navigation positioning satellite to determine the positioning coordinates; then the intermediate frequency signal is used to send the "positioning coordinates" to the communication control device.

[0124] S2, the communication control device calculates the position and the steering angle based on the "positioning coordinates" and the "target to be jammed azimuth" in the "control parameters (including: jamming signal frequency band, preset signal frequency hopping sequence, preset signal modulation mode and target to be jammed azimuth)" received from the upper control device; then sends the jamming parameters including "jamming signal frequency band, preset signal frequency hopping sequence, preset signal modulation mode" to the switch; sends the "servo steering instruction" including the steering angle to the jamming source unit.

[0125] S3, the switch sends the "jamming parameters" to the jamming source unit; the switch can also send the redundancy check instruction to the servo turntable.

[0126] S4, the jamming source unit sends the "servo steering instruction" to the servo turntable; synchronously, it can also send the state feedback to the switch.

[0127] S5, the servo turntable executes "mechanical steering" based on the servo steering instruction, thereby driving the helical antenna array to rotate, so that the radiation angle thereof covers the target to be interfered; synchronously, the servo turntable can also feed back the actual angle to the communication control device.

[0128] S6, the interference source unit can send the radio frequency interference signal to the helical antenna array (i.e., the antenna assembly described in the foregoing embodiment), so that the helical antenna array radiates the radio frequency interference signal to the target to be interfered.

[0129] Based on the working process of the single navigation interference device and in combination with the foregoing navigation interference system example, multiple navigation interference devices can interfere with the target to be interfered from different directions and frequencies under the coordinated command of the upper-level control device, so that the multi-element zero nulling antenna of the target to be interfered is difficult to form effective nulls to all interference sources at the same time, thereby destroying the anti-interference capability thereof.

[0130] The basic principles of the present disclosure are described above in combination with specific embodiments, but it should be pointed out that the advantages, advantages, effects and the like mentioned in the present disclosure are only examples and not limitations, and these advantages, advantages, effects and the like cannot be considered as the must-have of each embodiment of the present disclosure. In addition, the specific details of the foregoing disclosure are only for the purpose of example and for the purpose of understanding, and the foregoing details do not limit the present disclosure to the must-use specific details.

[0131] Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between each embodiment can be referred to each other. For the system embodiment, since it basically corresponds to the method embodiment, the description is relatively simple, and the relevant part can be referred to the part of the method embodiment.

[0132] The block diagrams of the devices, apparatuses, equipment, systems involved in the present disclosure are only illustrative examples and are not intended to require or imply the connection, arrangement, configuration shown in the block diagram. As those skilled in the art will recognize, these devices, apparatuses, equipment, systems can be connected, arranged, configured in any way. Words such as "include", "contain", "have" and the like are open-ended words, which mean "including but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "and / or", and can be used interchangeably unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

[0133] It should also be noted that in the devices, apparatuses and methods of the present disclosure, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be considered as equivalent solutions of the present disclosure.

[0134] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other aspects without departing from the scope of the disclosure. Thus, the present disclosure is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0135] The above description has been given for the purposes of illustration and description. Furthermore, this description does not purport to be exhaustive or to limit the embodiments of the disclosure to the precise forms disclosed. Although several example aspects and embodiments have been discussed above, various modifications, substitutions, changes, additions, and equivalents will be apparent to those skilled in the art from the description and drawings.

Claims

1. A navigation jammer for countering multi-element nulling antennas, characterized in that: The navigation jamming device includes a power supply module, a communication control module and a jamming signal module; The power supply module is electrically connected to the communication control module and the interference signal module respectively, so as to supply power to the communication control module and the interference signal module respectively; The communication control module is electrically connected to the interference signal module to send control parameters to the interference signal module; wherein the control parameters are issued by a superior control device in communication with the communication control module, and the control parameters include an interference signal frequency band, a preset signal frequency hopping sequence, a preset signal modulation mode, and an orientation of a target to be interfered with, wherein the target to be interfered with is a navigation receiving device having a multi-element nulling antenna; The interference signal module is used to generate a same-frequency band multi-channel interference signal according to the control parameters, and radiate the same-frequency band multi-channel interference signal to the target to be interfered with so as to interfere with the navigation frequency band of the target to be interfered with; wherein the same-frequency band multi-channel interference signals do not interfere with each other.

2. The navigation jammer according to claim 1, characterized in that: The same-frequency-band multi-channel interference signal is a same-frequency-band four-channel interference signal; The frequency band of the multi-channel interference signal in the same frequency band includes a first interference frequency band and a second interference frequency band; wherein, The frequency range of the first interference frequency band is 1.5 GHz to 1.7 GHz; The frequency range of the second interference frequency band is 1.1 GHz to 1.3 GHz.

3. The navigation jammer according to claim 2, characterized in that: The interference signal module includes four sets of independent signal generation links, wherein each set of independent signal generation links corresponds to one interference signal channel; Each independent signal generation link includes a signal generation unit, a power amplifier unit, a selection switch, and an antenna assembly that are sequentially connected in communication; wherein, The signal generating unit is used to generate an interference source signal; The power amplifier unit is used to amplify the interference source signal to obtain an amplified interference signal; The selection switch is used to select the connection between the power amplifier unit and the antenna assembly when the working state of the power amplifier unit is normal, so that the amplified interference signal is radiated to the target to be interfered through the antenna assembly.

4. The navigation jammer according to claim 3, characterized in that: The signal generating unit includes a digital baseband generator, a frequency synthesizer, and a signal modulator that are communicatively connected; The digital baseband generator is used to generate a baseband signal according to the interference signal frequency band; The frequency synthesizer is used to sequentially adjust the carrier frequency of the baseband signal according to the preset signal frequency hopping sequence to obtain a frequency hopping signal; The signal modulator is used to modulate the baseband signal according to the preset signal modulation mode to obtain a modulated signal; wherein the preset signal modulation mode includes amplitude modulation, frequency modulation, phase shift keying modulation, and orthogonal amplitude modulation; The interference source signal includes the frequency hopping signal and / or the modulation signal.

5. The navigation jammer according to claim 3, characterized in that: The power amplifier unit includes a state detection device and a cascaded four-stage amplifier; The state detection device is used to detect the working state of the four-stage amplifier, wherein the working state includes normal and abnormal; Each stage of the four-stage amplifier includes a single-channel radio frequency amplification circuit.

6. The navigation jammer according to claim 3, characterized in that: The antenna assembly includes two helical antennas; Wherein, the polarization mode of the helical antenna is circular polarization.

7. The navigation jammer according to claim 3, characterized in that: The interference signal module also includes a servo turntable; The servo turntable is used to rotate according to the azimuth adjustment amount so that the radiation azimuth angle of the antenna assembly mounted on the supporting surface of the servo turntable covers the target to be interfered; The azimuth angle adjustment amount is determined by the communication control module and sent to the servo turntable.

8. The navigation jammer according to claim 7, characterized in that: The communication control module includes a positioning and orientation component, a communication control device, and a switch connected in communication; The positioning and orientation component is used to determine its own position based on the acquired satellite navigation information; The communication control device is used to determine the azimuth angle adjustment amount according to the self-positioning and the azimuth of the target to be interfered with, and transmit the azimuth angle adjustment amount to the servo turntable via the signal generating unit; The communication control device is further configured to send the interference signal frequency band, the preset signal frequency hopping sequence, and the preset signal modulation mode to the switch; The switch is used to convey the interference signal frequency band, the preset signal frequency hopping sequence, and the preset signal modulation mode to the signal generating unit, and / or collect the working status information of the signal generating unit and the servo turntable.

9. The navigation jammer according to claim 8, characterized in that: The power supply module includes a DC storage unit and an AC power supply unit; The AC power supply unit is used to provide AC power to the DC power storage unit; wherein the AC power supply unit uses a power grid or a generator set as a power source; The DC power storage unit is used to convert AC power into DC power, and provide DC power to the servo turntable, the switch, the communication control device, and the positioning and orientation component respectively; The switch is further used to collect the working status of the DC power storage unit, the AC power supply unit, and the generator set.

10. A navigation jamming system for countering a multi-element nulling antenna, characterized in that: The navigation jamming system includes at least two navigation jamming devices and a superior control device. The navigation jammer is any one of claims 1 to 9. The at least two navigation jamming devices are used to be distributedly arranged around a target to be jammed to form a jamming network; wherein the target to be jammed is a navigation receiving device having a multi-element nulling antenna; The superior control device is used to send corresponding control parameters to each of the at least two navigation jamming devices, so that each of the navigation jamming devices radiates a same-frequency band multi-channel jamming signal to the target to be interfered with respectively; wherein the same-frequency band multi-channel jamming signal can interfere with the navigation frequency band of the target to be interfered.

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