Interference decoy circuit and equipment for navigation signal of unmanned aerial vehicle

Abstract

The utility model discloses an interference decoy circuit and equipment for navigation signals of an unmanned aerial vehicle. The interference decoy circuit comprises a processor, a radio frequency signal transceiver, a strike signal generator and an alternative radio frequency switch. The processor sends a switch selection signal to the either-or radio frequency switch, and the radio frequency signal transceiver or the strike signal generator can be selectively connected through the either-or radio frequency switch. When the radio frequency signal transceiver is connected, radio frequency decoy signal emission can be realized, and when the strike signal generator is connected, strike interference signal emission can be realized. The striking and the decoy of the navigation signal of the unmanned aerial vehicle can be realized through one device, and the striking and decoy functions can be flexibly switched, so that the cost is reduced, the design is simplified, and the use is flexible and convenient.

Description

Technical Field

[0001] This application relates to the technical field of unmanned aerial vehicle (UAV) countermeasures, and particularly to an interference and deception circuit and device for UAV navigation signals. Background Art

[0002] An unmanned aerial vehicle, abbreviated as UAV, is an unpiloted aircraft controlled by a radio remote control device and a self - contained program control device. UAVs are widely used in industries such as police, urban management, agriculture, geology, meteorology, electric power, emergency rescue and disaster relief, and video shooting. At the same time, in some key areas or application scenarios, it is also necessary to prevent UAVs.

[0003] Countermeasures against UAVs can include interfering with UAV remote control signals, interfering with UAV video transmission signals, and interfering with UAV satellite navigation signals. Among them, interfering with UAV navigation signals can be further divided into: striking and deception. Striking means that by interfering with a large signal, the UAV receiver cannot normally receive the navigation signal, thus losing navigation information and being forced to return. Deception means sending false navigation signals to the UAV, so that the UAV obtains incorrect navigation information and loses control.

[0004] Traditional UAV countermeasure devices can only achieve either the strike or the deception of UAV navigation signals with one device. If it is necessary to achieve both the strike and the deception of UAV navigation signals, one strike device and one deception device are required. The two devices have high costs, large weights, and are inconvenient to use. Utility Model Content

[0005] In view of this, the embodiments of this application provide an interference and deception circuit and device for UAV navigation signals, which can achieve both the strike and the deception of UAV navigation signals with one device.

[0006] To solve the above problems, the technical solutions provided by the embodiments of this application are as follows:

[0007] An interference and deception circuit for UAV navigation signals, the interference and deception circuit includes:

[0008] A processor, a radio frequency signal transceiver, a strike signal generator, and a two - way radio frequency switch;

[0009] The processor is connected to the radio frequency signal transceiver, the processor is connected to the two - way radio frequency switch, and the strike signal generator is connected to the two - way radio frequency switch; the radio frequency signal transceiver is connected to the two - way radio frequency switch; the output end of the two - way radio frequency switch is connected to the transceiver antenna;

[0010] The processor is configured to send a switch selection signal to the one - in - two radio - frequency switch. The switch selection signal is used to connect the strike signal generator to the output end of the one - in - two radio - frequency switch, or to connect the radio - frequency signal transceiver to the output end of the one - in - two radio - frequency switch;

[0011] The strike signal generator is configured to generate a strike interference signal. When the strike signal generator is connected to the output end of the one - in - two radio - frequency switch, the strike interference signal is transmitted through the transceiver antenna;

[0012] The radio - frequency signal transceiver is configured to receive the navigation signal of the unmanned aerial vehicle through the transceiver antenna when the radio - frequency signal transceiver is connected to the output end of the one - in - two radio - frequency switch, demodulate the navigation signal into a real baseband signal, and send it to the processor;

[0013] The processor is further configured to process the real baseband signal into a decoy baseband signal and send it to the radio - frequency signal transceiver;

[0014] The radio - frequency signal transceiver is configured to modulate the decoy baseband signal into a radio - frequency decoy signal. When the radio - frequency signal transceiver is connected to the output end of the one - in - two radio - frequency switch, the radio - frequency decoy signal is transmitted through the transceiver antenna.

[0015] In a possible implementation, the interference and decoy circuit includes a digital main board and a radio - frequency power - amplification board card;

[0016] The digital main board includes the processor and the radio - frequency signal transceiver;

[0017] The radio - frequency power - amplification board card includes the strike signal generator and the one - in - two radio - frequency switch.

[0018] In a possible implementation, the radio - frequency power - amplification board card further includes:

[0019] A multi - stage radio - frequency amplification link; the multi - stage radio - frequency amplification link is connected between the output end of the one - in - two radio - frequency switch and the transceiver antenna;

[0020] The multi - stage radio - frequency amplification link is configured to amplify the strike interference signal and transmit it through the transceiver antenna when the strike signal generator is connected to the output end of the one - in - two radio - frequency switch; and amplify the radio - frequency decoy signal and transmit it through the transceiver antenna when the radio - frequency signal transceiver is connected to the output end of the one - in - two radio - frequency switch.

[0021] In a possible implementation, the radio - frequency signal transceiver and the one - in - two radio - frequency switch are connected by a radio - frequency coaxial cable.

[0022] In a possible implementation, the processor is connected to the radio frequency signal transceiver through a radio frequency microstrip line, and the strike signal generator is connected to the two-way radio frequency switch through a radio frequency microstrip line.

[0023] In a possible implementation, the interference decoy circuit includes a digital radio frequency hybrid board;

[0024] The digital radio frequency hybrid board includes a processor, a radio frequency signal transceiver, a strike signal generator, and a two-way radio frequency switch.

[0025] In a possible implementation, the digital radio frequency hybrid board further includes:

[0026] A multi-stage radio frequency amplification link; the multi-stage radio frequency amplification link is connected between the output end of the two-way radio frequency switch and the transceiver antenna;

[0027] The multi-stage radio frequency amplification link is configured to, when the strike signal generator is connected to the output end of the two-way radio frequency switch, amplify the strike interference signal and transmit it through the transceiver antenna; when the radio frequency signal transceiver is connected to the output end of the two-way radio frequency switch, amplify the radio frequency decoy signal and transmit it through the transceiver antenna.

[0028] In a possible implementation, the processor is connected to the radio frequency signal transceiver through a radio frequency microstrip line, and the strike signal generator is connected to the two-way radio frequency switch through a radio frequency microstrip line; the radio frequency signal transceiver is connected to the two-way radio frequency switch through a radio frequency microstrip line.

[0029] In a possible implementation, the operating frequency band of the two-way radio frequency switch covers the frequency band of the navigation signal of the unmanned aerial vehicle.

[0030] An interference decoy device for an unmanned aerial vehicle navigation signal, the interference decoy device includes the interference decoy circuit for an unmanned aerial vehicle navigation signal as described above.

[0031] Thus, the embodiments of the present application have the following beneficial effects:

[0032] In the interference decoy circuit for an unmanned aerial vehicle navigation signal provided by the embodiments of the present application, there is a two-way radio frequency switch, and the radio frequency signal transceiver or the strike signal generator can be selectively connected through the two-way radio frequency switch. When the radio frequency signal transceiver is connected, the radio frequency decoy signal can be transmitted, and when the strike signal generator is connected, the strike interference signal can be transmitted. The strike and decoy of the unmanned aerial vehicle navigation signal can be achieved by one device, and the strike and decoy functions can be flexibly switched, thereby reducing costs, simplifying the design, and being flexible and convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of an interference and deception circuit for UAV navigation signals provided by an embodiment of the present application;

[0034] Figure 2 Schematic diagram of another interference and deception circuit for UAV navigation signals provided by an embodiment of the present application;

[0035] Figure 3 Schematic diagram of another interference and deception circuit for UAV navigation signals provided by an embodiment of the present application. Detailed implementation manners

[0036] To make the above objects, features, and advantages of the embodiments of the present application more obvious and understandable, the embodiments of the present application will be further described in detail below with reference to the drawings and specific implementation manners.

[0037] To facilitate the understanding and explanation of the technical solutions provided by the embodiments of the present application, the background technology of the embodiments of the present application will be described first below.

[0038] Currently, for UAV countermeasure devices, one device can only achieve the function of striking or deceiving UAV navigation signals, and cannot achieve both functions simultaneously. If both the striking and deceiving functions are required, one striking device and one deceiving device are needed. The two devices have high costs, large weights, and are inconvenient to use.

[0039] Based on this, the embodiments of the present application provide an interference and deception circuit and device for UAV navigation signals, which realize both the UAV striking and deceiving functions with one radio frequency link (i.e., one device), and the striking and deceiving functions can be flexibly switched, thereby reducing costs, simplifying the design, and being flexible and convenient to use.

[0040] To facilitate the understanding of the embodiments of the present application, an interference and deception circuit for UAV navigation signals provided by the embodiments of the present application will be described below with reference to the drawings.

[0041] See Figure 1 As shown in the figure, this figure is a schematic diagram of an interference and deception circuit for UAV navigation signals provided by an embodiment of the present application. The interference and deception circuit may include:

[0042] A processor 101, a radio frequency signal transceiver 102, a striking signal generator 103, and a one - of - two radio frequency switch 104.

[0043] Among them, the processor 101 is connected to the radio frequency signal transceiver 102, the processor 101 is connected to the one - of - two radio frequency switch 104, the striking signal generator 103 is connected to the one - of - two radio frequency switch 104; the radio frequency signal transceiver 102 is connected to the one - of - two radio frequency switch 104; the output end of the one - of - two radio frequency switch 104 is connected to the transceiver antenna.

[0044] A processor 101 is configured to send a switch selection signal to a two-way radio frequency switch. The switch selection signal is used to connect the strike signal generator to the output end of the two-way radio frequency switch, or to connect the radio frequency signal transceiver to the output end of the two-way radio frequency switch.

[0045] A strike signal generator 103 is configured to generate a strike interference signal. When the strike signal generator is connected to the output end of the two-way radio frequency switch, the strike interference signal is transmitted through the transceiver antenna.

[0046] A radio frequency signal transceiver 102 is configured to receive the navigation signal of the unmanned aerial vehicle through the transceiver antenna when the radio frequency signal transceiver is connected to the output end of the two-way radio frequency switch, demodulate the navigation signal into a real baseband signal, and send it to the processor.

[0047] The processor 101 is further configured to process the real baseband signal into a decoy baseband signal and send it to the radio frequency signal transceiver.

[0048] The radio frequency signal transceiver 102 is configured to modulate the decoy baseband signal into a radio frequency decoy signal. When the radio frequency signal transceiver is connected to the output end of the two-way radio frequency switch, the radio frequency decoy signal is transmitted through the transceiver antenna.

[0049] In an embodiment of the present application, the processor may be an MCU (Microcontroller Unit), a single-chip microcomputer, or an FPGA (Field Programmable Gate Array) integrated with an ARM core, etc. The processor may send a switch selection signal to the two-way radio frequency switch based on the user's selection. When the user selects the decoy interference mode, the switch selection signal is set to a high level, for example, to switch the two-way radio frequency switch to the decoy radio frequency channel, that is, to connect the radio frequency signal transceiver to the output end of the two-way radio frequency switch. When the user selects the strike interference mode, the switch selection signal is set to a low level, for example, to switch the two-way radio frequency switch to the interference radio frequency channel, that is, to connect the strike signal generator to the output end of the two-way radio frequency switch.

[0050] When connecting the jamming signal generator to the output end of the two-way radio frequency switch, the jamming signal generator generates a jamming signal. The GNSS (Global Navigation Satellite System) jamming signal is a fast frequency sweep signal generated by an analog circuit. This jamming signal causes the target UAV to be unable to receive the normal GNSS signal due to a greater power than the GNSS signal, thereby losing the navigation signal and causing the UAV to hover or return. The jamming signal includes, but is not limited to, a single-tone sweep signal. GNSS includes, but is not limited to, GPS (Global Positioning System), Beidou, GLONASS, Galileo, etc.

[0051] When connecting the radio frequency signal transceiver to the output end of the two-way radio frequency switch, it is necessary to generate a radio frequency spoofing signal according to the received GNSS signal. The radio frequency spoofing signal is consistent with the normal GNSS signal but contains false positioning information. After receiving the radio frequency spoofing signal, the target UAV can normally parse the information therein and then fly according to the false positioning information, resulting in loss or crash. In practical applications, the radio frequency signal transceiver receives the navigation signal of the UAV through the transceiver antenna, demodulates the navigation signal into a real baseband signal, and sends it to the processor. The processor processes the real baseband signal into a spoofing baseband signal and sends it to the radio frequency signal transceiver. The spoofing baseband signal is transmitted by the radio frequency signal transceiver through the transceiver antenna to spoof the navigation signal of the target UAV. The model of the radio frequency signal transceiver can be, for example, AD9361, AD9364 or other transceivers.

[0052] The radio frequency signal transceiver, the jamming signal generator and the processor can be selected according to the actual situation. The embodiments of the present application do not limit the specific models of the radio frequency signal transceiver, the jamming signal generator and the processor.

[0053] In the interference and spoofing circuit of the UAV navigation signal provided by the embodiments of the present application, there is a two-way radio frequency switch. Through the two-way radio frequency switch, it is possible to select to connect the radio frequency signal transceiver or the jamming signal generator. When the radio frequency signal transceiver is connected, the radio frequency spoofing signal can be transmitted. When the jamming signal generator is connected, the jamming signal can be transmitted. By one device, it is possible to achieve the jamming and spoofing of the UAV navigation signal, and the jamming and spoofing functions can be flexibly switched. Thereby reducing costs, simplifying the design, and being flexible and convenient to use.

[0054] See Figure 2 As shown in the figure, this figure is a schematic diagram of another interference and spoofing circuit of the UAV navigation signal provided by the embodiments of the present application. The interference and spoofing circuit may include:

[0055] A digital main board and a radio frequency power amplification board.

[0056] Among them, the digital main board includes a processor 101 and a radio frequency signal transceiver 102.

[0057] The radio frequency power amplification board includes a strike signal generator 103 and a one - in - two radio frequency switch 104.

[0058] In the embodiment of the present application, the interference decoy circuit may include a digital main board and a radio frequency power amplification board. Since the strike signal generator uses an analog signal to generate a strike interference signal, the strike signal generator needs to generate a strike interference signal on the radio frequency power amplifier board. And the decoy baseband signal needs to be generated by a baseband algorithm and modulated into a radio frequency decoy signal in the radio frequency signal transceiver, so it needs to be generated in the digital main board. Then the processor 101 and the radio frequency signal transceiver 102 are in the digital main board.

[0059] For the relevant descriptions of the processor 101, the radio frequency signal transceiver 102, the strike signal generator 103, and the one - in - two radio frequency switch 104, reference can be made to the above - mentioned embodiments, and details will not be elaborated here.

[0060] In a possible implementation manner, the radio frequency power amplification board may further include:

[0061] A multi - stage radio frequency amplification link; the multi - stage radio frequency amplification link is connected between the output end of the one - in - two radio frequency switch and the transceiver antenna.

[0062] The multi - stage radio frequency amplification link is used to amplify the strike interference signal and transmit it through the transceiver antenna when the strike signal generator is connected to the output end of the one - in - two radio frequency switch; when the radio frequency signal transceiver is connected to the output end of the one - in - two radio frequency switch, it amplifies the radio frequency decoy signal and transmits it through the transceiver antenna.

[0063] The multi - stage radio frequency amplification link is not limited to a two - stage radio frequency amplification link, and can amplify the strike interference signal and the radio frequency decoy signal, and the amplified strike interference signal and radio frequency decoy signal are then transmitted through the transceiver antenna.

[0064] In a possible implementation manner, the radio frequency signal transceiver is connected to the one - in - two radio frequency switch through a radio frequency coaxial cable.

[0065] In a possible implementation manner, the processor is connected to the radio frequency signal transceiver through a radio frequency microstrip line, and the strike signal generator is connected to the one - in - two radio frequency switch through a radio frequency microstrip line.

[0066] In practical applications, the digital main board and the radio frequency power amplifier board are connected by a radio frequency coaxial cable, that is, the radio frequency signal transceiver is connected to the one - in - two radio frequency switch by a radio frequency coaxial cable. Each device on the same board is connected by a radio frequency microstrip line, that is, the processor is connected to the radio frequency signal transceiver by a radio frequency microstrip line, and the jamming signal generator is connected to the one - in - two radio frequency switch by a radio frequency microstrip line.

[0067] In the embodiment of the present application, the interference decoy circuit is implemented through the digital main board and the radio frequency power amplifier board, with low development difficulty and low cost.

[0068] See Figure 3 As shown in the figure, this figure is a schematic diagram of another interference decoy circuit for the UAV navigation signal provided by the embodiment of the present application. The interference decoy circuit may include:

[0069] Digital radio frequency hybrid board.

[0070] The digital radio frequency hybrid board includes a processor 101, a radio frequency signal transceiver 102, a jamming signal generator 103, and a one - in - two radio frequency switch 104.

[0071] In the embodiment of the present application, the digital main board and the radio frequency power amplifier board can also be combined, and the interference decoy circuit is implemented by the digital radio frequency hybrid board. That is, the processor 101, the radio frequency signal transceiver 102, the jamming signal generator 103, and the one - in - two radio frequency switch 104 are all mounted on the digital radio frequency hybrid board.

[0072] Among them, for the relevant descriptions of the processor 101, the radio frequency signal transceiver 102, the jamming signal generator 103, and the one - in - two radio frequency switch 104, reference can be made to the above - mentioned embodiments, and details are not repeated here.

[0073] In a possible implementation manner, the digital radio frequency hybrid board may further include:

[0074] A multi - stage radio frequency amplification link; the multi - stage radio frequency amplification link is connected between the output end of the one - in - two radio frequency switch and the transceiver antenna.

[0075] The multi - stage radio frequency amplification link is used to amplify the jamming interference signal and transmit it through the transceiver antenna when the jamming signal generator is connected to the output end of the one - in - two radio frequency switch; when the radio frequency signal transceiver is connected to the output end of the one - in - two radio frequency switch, it amplifies the radio frequency decoy signal and transmits it through the transceiver antenna.

[0076] Similarly, the multi - stage radio frequency amplification link is not limited to a two - stage radio frequency amplification link, and can amplify the jamming interference signal and the radio frequency decoy signal, and the amplified jamming interference signal and radio frequency decoy signal are then transmitted through the transceiver antenna.

[0077] In a possible implementation, the processor is connected to the radio frequency signal transceiver through a radio frequency microstrip line, and the jamming signal generator is connected to the two-way radio frequency switch through a radio frequency microstrip line; the radio frequency signal transceiver is connected to the two-way radio frequency switch through a radio frequency microstrip line.

[0078] In practical applications, the devices on the same board are connected through radio frequency microstrip lines.

[0079] The embodiment of the present application realizes the interference decoy circuit through a digital radio frequency hybrid board. Only one board is used to realize the jamming and decoy functions of the UAV navigation signal. The circuit structure is relatively clear and the implementation is convenient.

[0080] Based on the above embodiments, in a possible implementation, the operating frequency band of the two-way radio frequency switch can cover the frequency band of the UAV navigation signal.

[0081] The operating frequency band of the radio frequency switch can cover the GNSS signal frequency band (such as 1.2G, 1.5G, etc.), and at the same time meet the radio frequency index requirements, such as voltage standing wave ratio, insertion loss, power level, channel isolation, etc.

[0082] In addition, the embodiment of the present application further provides a UAV navigation signal interference decoy device, which may include the UAV navigation signal interference decoy circuit according to any one of the above embodiments. For the relevant description of the UAV navigation signal interference decoy circuit, reference may be made to the above embodiments, which will not be elaborated here.

[0083] It should be noted that the various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the interference decoy device disclosed in the embodiment, since it corresponds to the interference decoy circuit disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the interference decoy circuit part.

[0084] It should be understood that in the present application, "at least one (item)" means one or more, and "a plurality" means two or more. " / ", used to describe the association relationship of associated objects, indicates that three relationships may exist. For example, "A and / or B" may indicate: only A exists, only B exists, and both A and B exist at the same time. Among them, A and B may be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one (item) of the following" or its similar expression refers to any combination of these items, including any combination of single item (item) or plural items (items). For example, at least one (item) of a, b or c may indicate: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c may be single or multiple.

[0085] It should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0086] The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A jamming and decoying circuit for an unmanned aerial vehicle navigation signal, characterized in that The interference deception circuit includes: a processor, a radio frequency signal transceiver, a strike signal generator, and a two-way radio frequency switch; the processor is connected to the radio frequency signal transceiver, the processor is connected to the two-way radio frequency switch, and the strike signal generator is connected to the two-way radio frequency switch; the radio frequency signal transceiver is connected to the two-way radio frequency switch; the output end of the two-way radio frequency switch is connected to a transceiver antenna; the processor is configured to send a switch selection signal to the two-way radio frequency switch, and the switch selection signal is used to connect the strike signal generator to the output end of the two-way radio frequency switch, or to connect the radio frequency signal transceiver to the output end of the two-way radio frequency switch; the strike signal generator is configured to generate a strike interference signal, and when the strike signal generator is connected to the output end of the two-way radio frequency switch, the strike interference signal is transmitted through the transceiver antenna; the radio frequency signal transceiver is configured to receive a navigation signal of the unmanned aerial vehicle through the transceiver antenna when the radio frequency signal transceiver is connected to the output end of the two-way radio frequency switch, demodulate the navigation signal into a real baseband signal, and send it to the processor; the processor is further configured to process the real baseband signal into a deception baseband signal and send it to the radio frequency signal transceiver; the radio frequency signal transceiver is configured to modulate the deception baseband signal into a radio frequency deception signal, and when the radio frequency signal transceiver is connected to the output end of the two-way radio frequency switch, the radio frequency deception signal is transmitted through the transceiver antenna.

2. The interference decoy circuit according to claim 1, wherein The interference deception circuit includes a digital main board and a radio frequency power amplifier board; the digital main board includes the processor and the radio frequency signal transceiver; the radio frequency power amplifier board includes the strike signal generator and the two-way radio frequency switch.

3. The interference decoy circuit according to claim 2, characterized in that, The radio frequency power amplifier board further includes: a multi-stage radio frequency amplification link; the multi-stage radio frequency amplification link is connected between the output end of the two-way radio frequency switch and the transceiver antenna; the multi-stage radio frequency amplification link is configured to amplify the strike interference signal and transmit it through the transceiver antenna when the strike signal generator is connected to the output end of the two-way radio frequency switch; and amplify the radio frequency deception signal and transmit it through the transceiver antenna when the radio frequency signal transceiver is connected to the output end of the two-way radio frequency switch.

4. The interference decoy circuit according to claim 2, wherein The radio frequency signal transceiver and the two-way radio frequency switch are connected by a radio frequency coaxial cable.

5. The interference decoy circuit according to claim 2, wherein The processor and the radio frequency signal transceiver are connected by a radio frequency microstrip line, and the strike signal generator and the two-way radio frequency switch are connected by a radio frequency microstrip line.

6. The interference decoy circuit according to claim 1, wherein The interference deception circuit includes a digital radio frequency hybrid board; the digital radio frequency hybrid board includes a processor, a radio frequency signal transceiver, a strike signal generator, and a two-way radio frequency switch.

7. The interference decoy circuit according to claim 6, wherein The digital radio frequency hybrid board further includes: a multi-stage radio frequency amplification link; the multi-stage radio frequency amplification link is connected between the output end of the two-way radio frequency switch and the transceiver antenna; The multi-stage RF amplification link is used to amplify the strike interference signal and transmit it through the transceiver antenna when the strike signal generator is connected to the output end of the two-way RF switch; and to amplify the RF decoy signal and transmit it through the transceiver antenna when the RF signal transceiver is connected to the output end of the two-way RF switch.

8. The interference decoy circuit according to claim 6, wherein The processor is connected to the RF signal transceiver through an RF microstrip line, and the strike signal generator is connected to the two-way RF switch through an RF microstrip line; the RF signal transceiver is connected to the two-way RF switch through an RF microstrip line.

9. The interference decoy circuit according to any one of claims 1-8, characterized in that, The operating frequency band of the two-way RF switch covers the frequency band of the navigation signal of the UAV.

10. A device for interfering and decoying an unmanned aerial vehicle navigation signal, characterized in that, The interference and decoy device includes the interference and decoy circuit for the UAV navigation signal according to any one of claims 1-9.

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