Missile-borne anti-interference Beidou navigation module

Abstract

The utility model provides a missile-borne anti-interference Beidou navigation module, which belongs to the technical field of navigation equipment and comprises an anti-interference antenna, an anti-interference module and a receiver which are sequentially connected. The anti-interference antenna comprises a multi-array-element antenna used for acquiring Beidou B3 frequency point signals and a low-noise amplification assembly used for filtering and amplifying the Beidou B3 frequency point signals, and the anti-interference module comprises a radio frequency unit and an anti-interference digital board. The anti-interference antenna is connected with the anti-interference module, and a radio frequency unit in the anti-interference module is respectively connected with the anti-interference digital board and the receiver. According to the utility model, Beidou B3 frequency point signals are obtained through the anti-interference antenna, anti-interference processing is carried out on the Beidou B3 frequency point signals through the anti-interference module, anti-interference processing is carried out on B3 frequency points of a Beidou satellite system, the broadband single-interference maximum interference-to-signal ratio is improved, and multi-direction signal interference is effectively filtered out.

Description

Technical Field

[0001] The utility model relates to the technical field of navigation equipment, in particular to a missile-borne anti-interference Beidou navigation module. Background Art

[0002] The Beidou navigation module can be equipped on missile-borne, airborne and other platforms. It is based on the Beidou satellite navigation system independently developed by China to provide the carrier with high-precision and high-frequency positioning, speed measurement and time information. The existing missile-borne Beidou navigation module is composed of an antenna, a radio frequency module and a baseband part, and the development trend is towards miniaturization and integration.

[0003] The Chinese utility model patent with publication number CN213026507U discloses a miniaturized missile-borne anti-interference antenna, which includes an antenna module and a signal processing module. The antenna module includes a radome, an antenna cavity and a radio frequency output channel, and the antenna cavity includes two ceramic antenna elements, two element transfer PCBs, and two low-noise amplifier PCBs. The signal processing module includes a down-conversion PCB, an intermediate frequency transfer PCB, a signal processing PCB, an up-conversion PCB and a local oscillator PCB.

[0004] However, the above-mentioned missile-borne anti-interference antenna has the following defects:

[0005] 1. The frequency supported by the above antenna is the B1 frequency of the Beidou satellite system or the L1 frequency of the GPS positioning system. The B3 frequency of the Beidou satellite system carries military code information and has high positioning accuracy. The enemy mainly interferes with the military code information of the B3 frequency. The anti-interference function of the anti-interference antenna should be mainly based on the B3 frequency of the Beidou satellite system;

[0006] 2. The above antenna uses two array elements, and the maximum interference-to-signal ratio of a single interference is only 70dB, and it can only counteract broadband suppression interference in one direction. Summary of the invention

[0007] The utility model provides a missile-borne anti-interference Beidou navigation module, which is used to solve the defect that the B3 frequency point of the Beidou satellite system is not anti-interference in the prior art and the anti-interference function needs to be improved.

[0008] The utility model provides a missile-borne anti-interference Beidou navigation module, comprising an anti-interference antenna, an anti-interference module and a receiver connected in sequence, the anti-interference antenna comprising a multi-element antenna for acquiring Beidou B3 frequency point signals and a low-noise amplification component for filtering and amplifying the Beidou B3 frequency point signals, the anti-interference module comprising a radio frequency unit and an anti-interference digital board, the anti-interference antenna being connected to the anti-interference module, and the radio frequency unit being respectively connected to the anti-interference digital board and the receiver.

[0009] According to a missile-borne anti-interference Beidou navigation module provided by the utility model, the anti-interference module includes a first clock circuit, the receiver includes a second clock circuit, and the first clock circuit and the second clock circuit are independent of each other.

[0010] According to a missile-borne anti-interference Beidou navigation module provided by the utility model, the radio frequency unit and the anti-interference digital board are connected via a plug-in connector.

[0011] According to a missile-borne anti-interference Beidou navigation module provided by the utility model, the radio frequency unit at least includes a multi-channel radio frequency receiving circuit and an up-conversion circuit, the input end of the multi-channel radio frequency receiving circuit is connected to the low-noise amplification component, and the output end is respectively connected to the up-conversion circuit and the anti-interference digital board, and the output end of the anti-interference digital board is connected to the up-conversion circuit.

[0012] According to a missile-borne anti-interference Beidou navigation module provided by the utility model, the anti-interference digital board at least includes an analog-to-digital conversion circuit, an anti-interference chip, a digital-to-analog conversion circuit and a clock management chip. The input end of the analog-to-digital conversion circuit is connected to the output end of the multi-channel radio frequency receiving circuit, and the output end is connected to the input end of the anti-interference chip. The output end of the anti-interference chip is connected to the input end of the digital-to-analog conversion circuit, the output end of the digital-to-analog conversion circuit is connected to the up-conversion circuit, and the clock management chip is respectively connected to the analog-to-digital conversion circuit, the anti-interference chip and the digital-to-analog conversion circuit.

[0013] According to a missile-borne anti-interference Beidou navigation module provided by the utility model, the anti-interference module also includes a power supply circuit, which is used to output a DC voltage to the anti-interference digital board and output another DC voltage to the radio frequency unit, and the radio frequency unit is also used to load the DC voltage to the low-noise amplifier component.

[0014] According to a missile-borne anti-interference Beidou navigation module provided by the utility model, the Beidou B3 frequency signal is a Beidou B3 frequency wireless RF signal, and the anti-interference antenna also includes an antenna adapter plate, which is used to convert the Beidou B3 frequency wireless RF signal received by the multi-element antenna into a B3 frequency wired RF signal, and send the B3 frequency wired RF signal to the low-noise amplification component.

[0015] According to a missile-borne anti-interference Beidou navigation module provided by the utility model, the low-noise amplification component comprises a dielectric filter, a limiter, a low-noise amplifier and a surface acoustic wave filter which are connected in sequence.

[0016] According to a missile-borne anti-interference Beidou navigation module provided by the utility model, the receiver includes a radio frequency chip and a baseband chip, the input end of the radio frequency chip is connected to the output end of the radio frequency unit, and the output end of the radio frequency chip is connected to the input end of the baseband chip.

[0017] According to a missile-borne anti-interference Beidou navigation module provided by the utility model, the anti-interference antenna, the anti-interference module and the receiver are independent of each other.

[0018] The missile-borne anti-interference Beidou navigation module provided by the utility model comprises an anti-interference antenna, an anti-interference module and a receiver connected in sequence, wherein the anti-interference antenna comprises a multi-element antenna for acquiring Beidou B3 frequency point signal and a low-noise amplification component for filtering and amplifying the Beidou B3 frequency point signal, the anti-interference module comprises a radio frequency unit and an anti-interference digital board, the anti-interference antenna is connected to the anti-interference module, and the radio frequency unit is respectively connected to the anti-interference digital board and the receiver. The utility model acquires Beidou B3 frequency point signal through the anti-interference antenna and performs anti-interference processing on the Beidou B3 frequency point signal through the anti-interference module, realizes anti-interference processing on the B3 frequency point of the Beidou satellite system, improves the maximum interference-to-signal ratio of broadband single interference, and effectively filters out signal interference from multiple directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a principle block diagram of the missile-borne anti-interference Beidou navigation module provided by the utility model;

[0021] Figure 2 This is a principle block diagram of the low-noise amplifier component provided by the utility model;

[0022] Figure 3 It is a circuit schematic diagram of the radio frequency unit provided by the utility model;

[0023] Figure 4 This is a circuit schematic diagram of the anti-interference digital board provided by the utility model;

[0024] Figure 5 It is a circuit schematic diagram of the receiver provided by the utility model;

[0025] Reference numerals:

[0026] 100-anti-interference antenna, 110-multi-element antenna, 120-low noise amplifier component, 121-dielectric filter, 122-limiter, 123-low noise amplifier, 124-sound surface filter, 200-anti-interference module, 210-radio unit, 211-multi-channel radio frequency receiving circuit, 212-up conversion circuit, 220-anti-interference digital board, 221-analog-to-digital conversion circuit, 222-anti-interference chip, 223-digital-to-analog conversion circuit, 224-clock management chip, 300-receiver, 310-radio chip, 320-baseband chip. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances. The terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0030] Figure 1 This is the principle block diagram of the missile-borne anti-interference Beidou navigation module provided by the utility model, such as Figure 1As shown, the utility model provides a missile-borne anti-interference Beidou navigation module, including an anti-interference antenna 100, an anti-interference module 200 and a receiver 300 connected in sequence, the anti-interference antenna 100 includes a multi-element antenna 110 for acquiring Beidou B3 frequency signal and a low-noise amplification component 120 for filtering and amplifying the Beidou B3 frequency signal, the anti-interference module 200 includes a radio frequency unit 210 and an anti-interference digital board 220, the anti-interference antenna 100 is connected to the anti-interference module 200, and the radio frequency unit 210 is respectively connected to the anti-interference digital board 220 and the receiver 300.

[0031] Specifically, the Beidou B3 frequency signal is a Beidou B3 frequency wireless radio frequency signal. The multi-element antenna 110 is used to obtain the Beidou B3 frequency wireless radio frequency signal transmitted by the Beidou satellite system and convert the Beidou B3 frequency wireless radio frequency signal into a B3 frequency wired radio frequency signal. The radio frequency signal is relatively weak and mixed with various noises. The low-noise amplifier component 120 is used to filter out interference signals in the radio frequency signal and amplify the radio frequency signal. The amplified radio frequency signal is transmitted to the radio frequency unit 210, and firstly down-converted in the radio frequency unit 210 to obtain an intermediate frequency signal. The anti-interference digital board 220 is used to perform anti-interference processing on the intermediate frequency signal, and transmit the processed intermediate frequency signal to the radio frequency unit 210, up-converted into a radio frequency signal and transmitted to the receiver 300. The receiver 300 performs baseband processing on the received radio frequency signal to obtain the position, speed and time information contained in the electromagnetic wave signal of the B3 frequency point.

[0032] Optionally, the multi-element antenna 110 adopts a four-element design, with a maximum interference-to-signal ratio of no less than 95dB for a single interference, and resistance to three-way broadband interference of no less than 85dB; the Beidou B3 frequency signal is an electromagnetic wave signal, including the Beidou B3 frequency band military and civilian signals and the Beidou III military and military enhanced signals, which enhances applicability.

[0033] It can be understood that the utility model obtains the Beidou B3 frequency signal through the anti-interference antenna 100 and performs anti-interference processing on the Beidou B3 frequency signal through the anti-interference module 200, thereby realizing anti-interference processing of the B3 frequency of the Beidou satellite system, improving the maximum interference-to-signal ratio of broadband single interference, and effectively filtering out signal interference from multiple directions.

[0034] On the basis of the above embodiment, as an optional embodiment, the Beidou B3 frequency signal is a Beidou B3 frequency wireless RF signal, and the anti-interference antenna 100 also includes an antenna adapter board, which is used to convert the Beidou B3 frequency wireless RF signal received by the multi-element antenna 110 into a B3 frequency wired RF signal, and send the B3 frequency wired RF signal to the low-noise amplifier component 120.

[0035] Figure 2 This is a principle block diagram of the low noise amplifier component provided by the utility model, such as Figure 2 As shown, the low noise amplification component 120 includes a dielectric filter 121, a limiter 120, a low noise amplifier 123 and a surface acoustic wave filter 124 which are connected in sequence.

[0036] Specifically, the multi-element antenna 110 is a right-hand circularly polarized microstrip antenna, which has the characteristics of low profile, light weight, and easy conformality, and is easy to combine with the projectile to form a conformal structure. The antenna adapter board uses a power divider or a bridge to synthesize the electromagnetic wave signals with equal amplitude and orthogonal phase generated at the two feeding points of the right-hand circularly polarized microstrip antenna, and outputs the synthesized RF signal to the low-noise amplifier component 120. Specifically, the multi-element antenna 110 adopts a four-element design to obtain four Beidou B3 frequency signals. The antenna adapter board synthesizes the four Beidou B3 frequency signals into four RF signals and outputs them to the low-noise amplifier component 120.

[0037] The radio frequency signal received by the low noise amplifier component 120 is relatively weak, and there will be broadband noise and various out-of-band interferences. It is necessary to first pass through the dielectric filter 121 to filter out the far-end out-of-band interference, then amplify the signal through the low noise amplifier 123, and finally pass through the SAW filter 124 and other filters with high suppression ratio to suppress the near-end out-of-band interference, ensuring that the receiving channel of the radio frequency unit 210 is not affected by saturation blocking. In addition, in order to meet the requirements of anti-suppression interference, a limiter 120 will be added after the dielectric filter 121 to clamp the input power and protect the low noise amplifier 123.

[0038] It can be understood that the utility model provides a structural solution for the anti-interference antenna 100, which can increase the maximum interference-to-signal ratio of a single interference to no less than 95dB, and can effectively filter out broadband suppression interference, narrowband interference and swept frequency interference from up to three directions, thereby improving anti-interference performance.

[0039] Figure 3 is a circuit diagram of the radio frequency unit 210 provided by the present invention, such as Figure 3 As shown, based on the above embodiment, as an optional embodiment, the radio frequency unit 210 at least includes a multi-channel radio frequency receiving circuit 211 and an up-conversion circuit 212, the input end of the multi-channel radio frequency receiving circuit 211 is connected to the low-noise amplifier component 120, and the output end is respectively connected to the up-conversion circuit 212 and the anti-interference digital board 220, and the output end of the anti-interference digital board 220 is connected to the up-conversion circuit 212.

[0040] Optionally, the multi-channel RF receiving circuit 211 is composed of an RF receiving chip and an intermediate frequency filter, including four B3 frequency RF signal input channels. The anti-interference antenna 100 outputs the amplified four B3 frequency RF signals to the RF receiving chip. The RF receiving chip down-converts the four B3 frequency RF signals respectively, and then filters them through the intermediate frequency filter and outputs them to the anti-interference digital board 220.

[0041] Figure 4 This is the circuit schematic diagram of the anti-interference digital board provided by the utility model, such as Figure 4 As shown, the anti-interference digital board 220 at least includes an analog-to-digital conversion circuit 221, an anti-interference chip 222, a digital-to-analog conversion circuit 223 and a clock management chip 224. The input end of the analog-to-digital conversion circuit 221 is connected to the output end of the multi-channel RF receiving circuit 211, and the output end is connected to the input end of the anti-interference chip 222. The output end of the anti-interference chip 222 is connected to the input end of the digital-to-analog conversion circuit 223, and the output end of the digital-to-analog conversion circuit 223 is connected to the up-conversion circuit 212. The clock management chip 224 is respectively connected to the analog-to-digital conversion circuit 221, the anti-interference chip 222 and the digital-to-analog conversion circuit 223.

[0042] Optionally, the intermediate frequency signal received by the anti-interference digital board 220 is in analog form, and the received first analog intermediate frequency signal is first converted into a digital intermediate frequency signal through the analog-to-digital conversion circuit 221, the anti-interference chip 222 performs anti-interference processing on the digital intermediate frequency signal, and the digital-to-analog conversion circuit 223 converts the digital intermediate frequency signal after anti-interference processing into a second analog intermediate frequency signal, and returns the second analog intermediate frequency signal to the up-conversion circuit 212. The clock management chip 224 is used to convert the 10MHz reference clock into a 62MHz clock, and output it to the analog-to-digital conversion circuit 221, the anti-interference chip 222 and the digital-to-analog conversion circuit 223 in a differential form.

[0043] It can be understood that the anti-interference digital board 220 provided by the present invention can effectively filter out broadband suppression interference, narrowband interference and swept frequency interference, thereby improving the anti-interference performance.

[0044] Based on the above embodiments, as an optional embodiment, the anti-interference module 200 also includes a power supply circuit, which is used to output a DC voltage to the anti-interference digital board 220 and output another DC voltage to the RF unit 210. The RF unit 210 is also used to load the DC voltage to the low-noise amplifier component 120.

[0045] Specifically, the anti-interference module 200 is powered by 5V. In the anti-interference digital board 220, the 5V voltage is filtered and stabilized by the power supply circuit to provide 1.1V, 1.8V, and 3.3V for the components of the anti-interference digital board 220; in the RF unit 210, the 5V voltage is stepped down to 3.3V to supply each device, and is also directly loaded to the RF input port to power the low-noise amplifier 123 in the anti-interference antenna 100.

[0046] It is understandable that in actual testing, misoperation may occur, resulting in a short circuit and burning circuit components. In order to ensure that the circuit can work normally, the utility model separates a 5V line to power the low-noise amplifier 123, and adds an overcurrent protection chip to limit the maximum current that can pass through, so that even if a short short circuit occurs, the low-noise amplifier 123 can be prevented from being burned.

[0047] Figure 5 It is a circuit diagram of the receiver provided by the utility model, such as Figure 5 As shown, based on the above embodiments, as an optional embodiment, the receiver 300 includes a RF chip 310 and a baseband chip 320, the input end of the RF chip 310 is connected to the output end of the RF unit 210, and the output end of the RF chip 310 is connected to the input end of the baseband chip 320.

[0048] Specifically, the receiver 300 is composed of an RNSS digital baseband board, and the core chips are a radio frequency chip 310 with down-conversion and a baseband chip 320. The radio frequency chip 310 mainly down-converts the B3 frequency radio frequency signal after anti-interference processing and outputs an analog intermediate frequency. The baseband chip 320 performs analog-to-digital conversion sampling and baseband signal processing on the analog intermediate frequency output by the radio frequency chip 310, and outputs position, speed and time positioning information.

[0049] Among them, RNSS (Radio Navigation Satellite System) is another type of satellite radio positioning service. The distance measurement and position calculation from the user to the satellite cannot be completed independently by the user himself, but must be completed by an external system through the user's response. Its characteristic is that through the user's response, while completing the positioning, the user's position report to the external system is completed, and the integration of positioning and communication can be realized.

[0050] The RF chip 310 is a dedicated down-conversion chip, which contains 4 RF channels. The RF front-end amplification and filtering can realize down-conversion processing of 4 signals and output them as I&Q analog intermediate frequency signals or 4-bit digital intermediate frequency signals.

[0051] The baseband chip 320 is a Beidou baseband chip 320, which integrates a dual-core high-performance processor, 12-bits ADC, supports up to 12 digital intermediate frequency inputs or 8 analog intermediate frequency inputs, can track 12 frequency satellite signals at the same time, and has anti-interference capabilities such as narrowband, pulse, and multipath. It integrates 2MB SRAM and can expand 16-bit 4G bit DDR3L memory; it has reset management function; through I 2 C external high-precision RTC; it also has RS232 interface for program upgrade and RS422 serial port for external interactive communication.

[0052] It can be understood that the present invention provides a configuration scheme of a receiver 300 that can have anti-interference capabilities such as anti-narrowband, anti-pulse, and multipath.

[0053] Based on the above embodiment, as an optional embodiment, the anti-interference module 200 includes a first clock circuit, the receiver 300 includes a second clock circuit, and the first clock circuit and the second clock circuit are independent of each other.

[0054] Specifically, the first clock circuit outputs a 10MHz reference clock, one of which is provided to the RF receiving chip for synthesizing the local oscillator signal and used for signal up-conversion and down-conversion processing; the other is provided to the anti-interference digital board 220 after filtering and shaping, and is converted to 62MHz by the frequency multiplier on the anti-interference digital board 220.

[0055] The second clock circuit is an active crystal oscillator, which is used to provide a 20 MHz clock to the SOC. The clock used by the baseband chip 320 is a 62 MHz clock.

[0056] It can be understood that the first clock circuit and the second clock circuit are independent of each other, and the influence caused by the difference between the clocks can be eliminated.

[0057] Based on the above embodiment, as an optional embodiment, the radio frequency unit 210 and the anti-interference digital board 220 are connected through a plug-in connector.

[0058] Specifically, the mutual transmission of signals and the supply of power in the anti-interference module 200 are all achieved through the plug-in connector to achieve cable-free assembly: the 4 intermediate frequency signals and 1 clock signal output by the radio frequency unit 210, and the 1 intermediate frequency signal output by the anti-interference digital board 220 are all implemented in the form of plug-in MMCX connectors; the 5V power supply provided by the anti-interference digital board 220 to the radio frequency unit 210 and the SPI signal between the two boards are connected through a rectangular connector. The compact design greatly reduces the size and weight of the structure, and the space utilization rate is higher, which meets the requirements of missile-borne equipment.

[0059] Based on the above embodiment, as an optional embodiment, the anti-interference antenna 100, the anti-interference module 200 and the receiver 300 are independent of each other. The three submodules are independent of each other, have good heat dissipation performance, and the installation layout is more flexible, and the testability and maintainability of the missile-borne anti-interference Beidou navigation module are better.

[0060] Based on the above embodiment, as an optional embodiment, the multi-element antenna 110, the antenna adapter board and the low-noise amplifier component 120 can be integrated into a whole to improve the integration, and the low-noise amplifier component 120 can also be transferred to the RF unit 210. A gain-adjustable low-noise amplifier chip can also be selected to increase the dynamic range of RF signal reception.

[0061] Based on the above embodiment, as an optional embodiment, under the condition that the clocks of the RF down-conversion chip, the anti-interference digital board 220 and the baseband chip 320 are of the same source, the receiver 300 directly receives the intermediate frequency signal for processing, which can save the circuits for up-conversion and down-conversion processing.

[0062] To sum up, the utility model obtains the Beidou B3 frequency signal through the anti-interference antenna 100 and performs anti-interference processing on the Beidou B3 frequency signal through the anti-interference module 200, thereby realizing anti-interference processing of the B3 frequency of the Beidou satellite system, improving the maximum interference-to-signal ratio of broadband single interference, and effectively filtering out signal interference from multiple directions.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A missile-borne anti-interference Beidou navigation module, characterized in that: It includes an anti-interference antenna, an anti-interference module and a receiver connected in sequence, the anti-interference antenna includes a multi-element antenna for acquiring Beidou B3 frequency signal and a low-noise amplification component for filtering and amplifying the Beidou B3 frequency signal, the anti-interference module includes a radio frequency unit and an anti-interference digital board, the anti-interference antenna is connected to the anti-interference module, and the radio frequency unit is respectively connected to the anti-interference digital board and the receiver.

2. The missile-borne anti-interference Beidou navigation module according to claim 1 is characterized in that: The anti-interference module includes a first clock circuit, and the receiver includes a second clock circuit, and the first clock circuit and the second clock circuit are independent of each other.

3. The missile-borne anti-interference Beidou navigation module according to claim 1 is characterized in that: The radio frequency unit and the anti-interference digital board are connected via a plug-in connector.

4. The missile-borne anti-interference Beidou navigation module according to any one of claims 1 to 3, characterized in that: The radio frequency unit at least includes a multi-channel radio frequency receiving circuit and an up-conversion circuit, the input end of the multi-channel radio frequency receiving circuit is connected to the low-noise amplifier component, and the output end is respectively connected to the up-conversion circuit and the anti-interference digital board, and the output end of the anti-interference digital board is connected to the up-conversion circuit.

5. The missile-borne anti-interference Beidou navigation module according to claim 4 is characterized in that: The anti-interference digital board at least includes an analog-to-digital conversion circuit, an anti-interference chip, a digital-to-analog conversion circuit and a clock management chip. The input end of the analog-to-digital conversion circuit is connected to the output end of the multi-channel radio frequency receiving circuit, and the output end is connected to the input end of the anti-interference chip. The output end of the anti-interference chip is connected to the input end of the digital-to-analog conversion circuit, and the output end of the digital-to-analog conversion circuit is connected to the up-conversion circuit. The clock management chip is respectively connected to the analog-to-digital conversion circuit, the anti-interference chip and the digital-to-analog conversion circuit.

6. The missile-borne anti-interference Beidou navigation module according to claim 1, characterized in that: The anti-interference module also includes a power supply circuit, which is used to output a DC voltage to the anti-interference digital board and another DC voltage to the radio frequency unit. The radio frequency unit is also used to load the DC voltage to the low-noise amplifier component.

7. The missile-borne anti-interference Beidou navigation module according to claim 1, characterized in that: The Beidou B3 frequency signal is a Beidou B3 frequency wireless RF signal. The anti-interference antenna also includes an antenna adapter board, which is used to convert the Beidou B3 frequency wireless RF signal received by the multi-element antenna into a B3 frequency wired RF signal, and send the B3 frequency wired RF signal to the low-noise amplifier component.

8. The missile-borne anti-interference Beidou navigation module according to claim 1, characterized in that: The low noise amplification component comprises a dielectric filter, a limiter, a low noise amplifier and a surface acoustic wave filter which are connected in sequence.

9. The missile-borne anti-interference Beidou navigation module according to claim 1, characterized in that: The receiver includes a radio frequency chip and a baseband chip, the input end of the radio frequency chip is connected to the output end of the radio frequency unit, and the output end of the radio frequency chip is connected to the input end of the baseband chip.

10. The missile-borne anti-interference Beidou navigation module according to claim 1, characterized in that: The anti-interference antenna, the anti-interference module and the receiver are independent of each other.

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