Low radar observability anti-radiation module

Abstract

The low radar observability anti-radiation module comprises a millimeter wave antenna array, a microwave antenna array, a millimeter wave module, a microwave module, a power supply module and a digital processing module, the millimeter wave antenna array receives electromagnetic wave signals and transmits the electromagnetic wave signals to the millimeter wave module, and the millimeter wave antenna array converts eight paths of microwave signals into millimeter wave signals, transmits the millimeter wave signals and receives the reflected millimeter wave signals; the millimeter wave module receives the electromagnetic wave signal, then converts the electromagnetic wave signal to an X wave band after amplitude limiting, filtering and amplifying, and outputs the X wave band to the microwave module; the microwave antenna array receives an electromagnetic wave signal and transmits the electromagnetic wave signal to the microwave module; and the microwave module converts the electromagnetic wave signal and the X-waveband signal output by the millimeter wave module into intermediate frequency after amplitude limiting, filtering and amplifying, and outputs the intermediate frequency to the digital processing module.

Description

Technical Field

[0001] The invention belongs to the field of anti-radiation, and in particular relates to an anti-radiation module with low radar observability. Background Art

[0002] At present, the low radar observable anti-radiation module, as a key technical component designed to reduce the probability of radar detection, has a technical background derived from the urgent need for stealth and anti-reconnaissance capabilities in modern warfare environments. This module mainly reduces the possibility of being detected by the adversary's radar system by reducing the reflection, scattering and absorption of radar waves. However, although current technology has made certain progress in improving low radar observability, there are still many technical shortcomings.

[0003] First, the existing low radar observability anti-radiation modules are not adaptable in complex environments. In practical applications, radar detection environments often include a variety of complex backgrounds such as land, cities, oceans, and electromagnetic interference. The echoes generated by these backgrounds will have an adverse effect on target detection and form background clutter. Especially in the marine environment, the formation mechanism of sea clutter is complex. Affected by many environmental factors such as meteorology and geography, the sea surface changes nonlinearly and randomly, making it extremely difficult to recognize the characteristics of sea clutter, which increases the difficulty of radar detection.

[0004] Low observable targets usually have low signal-to-clutter ratio (SCR) and low signal-to-noise ratio (SNR), which makes it extremely difficult for radar to detect and identify them. Especially for "low, slow, small, fast, and hidden" targets, such as drones, small wooden boats, and stealth speedboats, their radar echoes are extremely weak and easily obscured by clutter, making them difficult to detect effectively.

[0005] The existing technology also faces the problem of complex target motion characteristics. The multi-dimensional motion of the target (such as pitch, yaw, roll, etc.) makes its attitude change complex and the micro-Doppler feature extraction difficult. At the same time, when the target moves at a non-uniform speed, the radar echo is modulated with a polynomial phase factor related to the target's maneuvering characteristics, resulting in the traditional Fourier transform-based signal processing method being no longer effective. The Doppler migration phenomenon causes the coherent accumulation gain to decrease, further increasing the difficulty of detection.

[0006] Although new signal processing methods such as fractional Fourier transform (FRFT) have provided new ways to detect low observable targets in recent years, these methods still have defects such as large amount of computation, poor time-frequency resolution, and poor parameter estimation accuracy in practical applications, making it difficult to meet the requirements of radar for refined processing of low observable moving targets. Therefore, how to improve the detection performance and adaptability of low radar observable anti-radiation modules in complex environments is still a major challenge facing current technology. A low radar observable anti-radiation module is urgently needed. Summary of the invention

[0007] The present invention proposes a low radar observable anti-radiation module, which solves the technical problem of efficiently receiving, processing and identifying electromagnetic wave signals from different frequency bands (millimeter waves and microwaves) in a complex electromagnetic environment, and realizing accurate angle measurement and signal control.

[0008] The technical solution of the present invention is implemented as follows: a low radar observable anti-radiation module, comprising a millimeter wave antenna array, a microwave antenna array, a millimeter wave module, a microwave module, a power supply module, and a digital processing module;

[0009] The millimeter wave antenna array receives electromagnetic wave signals and transmits the electromagnetic wave signals to the millimeter wave module. The millimeter wave antenna array converts the 8-channel microwave signals into millimeter wave signals and transmits them, and receives the reflected millimeter wave signals.

[0010] The millimeter wave module receives the electromagnetic wave signal, limits it, filters it, amplifies it, and then down-converts it to the X-band, and outputs it to the microwave module; the microwave antenna array receives the electromagnetic wave signal and transmits it to the microwave module;

[0011] The microwave module limits, filters, and amplifies the electromagnetic wave signal and the X-band signal output by the millimeter wave module, converts them down to an intermediate frequency, and outputs them to the digital processing module; and receives the control signal from the digital processing module to perform switch switching and attenuation control, and sends the microwave signal and the millimeter wave signal to the limiter, filter, and amplifier, and then converts them down to an intermediate frequency, and then outputs them to the digital processing module;

[0012] The power supply module adopts a linear voltage regulator module to step down the input DC 24V power supply twice to supply power to the millimeter wave module, microwave module and digital processing module respectively;

[0013] The digital processing module attenuates and switches the received electromagnetic wave signals, sorts and identifies the intermediate frequency signals output by the microwave module, calculates the angle information, and then reports the data to the host computer for processing; the ARM processor completes the control of the millimeter wave signal and the microwave signal, and reports the working status data of each module to the display control.

[0014] When dealing with low radar observable anti-radiation problems, single-band antennas and modules are usually used, which limits their adaptability and flexibility in complex electromagnetic environments. This technical solution integrates millimeter-wave antenna arrays and microwave antenna arrays to achieve simultaneous reception and processing of multi-band signals, significantly improving the detection range and accuracy of the system.

[0015] With multi-band signal processing capabilities, the millimeter wave antenna array is not only responsible for receiving and converting millimeter wave signals, but also can upgrade 8-channel microwave signals to millimeter wave signals and transmit them. This cross-band signal processing capability is not available in existing technologies. The cooperation between the microwave antenna array and the microwave module ensures the stable operation of the system in the microwave frequency band. The combination of the two greatly enhances the system's frequency band coverage and signal processing capabilities.

[0016] The signal processing process can be refined. Both the millimeter wave module and the microwave module adopt the signal processing process of limiting, filtering, and amplification, and down-convert the signal to a frequency band suitable for subsequent processing (X-band and intermediate frequency). This refined signal processing process not only improves the signal-to-noise ratio of the signal, but also provides a clearer and more accurate signal input for the digital processing module.

[0017] By optimizing the power module, a linear voltage regulator module is used to perform two voltage reduction operations to power the millimeter wave module, microwave module, and digital processing module respectively, ensuring the stable operation of each module while improving the overall energy efficiency of the system.

[0018] The digital processing module is intelligent, which is not only responsible for receiving, processing and identifying intermediate frequency signals, but also for calculating angle information and reporting it to the host computer for processing. At the same time, the introduction of the ARM processor realizes the intelligent control of millimeter wave signals and microwave signals, ensuring the real-time and accuracy of the system.

[0019] As a preferred implementation, the anti-radiation module operates in a millimeter wave frequency band below 2 mm, with a beam coverage of 360° and a beam range of 0.3° for a single antenna array; the millimeter wave antenna array transmits the received electromagnetic wave signal to the millimeter wave module.

[0020] As a preferred implementation, the number of the millimeter wave antenna arrays is 8, and the millimeter wave antenna array uses a duplexer with a center frequency of 30 GHz, a right-hand polarization mode, and an insertion loss of less than 3 dB.

[0021] As a preferred implementation, the microwave module includes 8 millimeter wave channels, each channel is composed of a low-noise amplifier, a mixer, a small signal amplifier, an attenuation control unit, and a digital logic unit; the digital processing module adopts an ARM processor, receives control signals from the outside, controls the attenuation amount and the switch state, and reports the working status data of each module to the display control; after receiving the control signal, the attenuation control unit outputs the control signal to the amplifier after voltage stabilization, and divides the maximum attenuation value of the attenuator into two paths, one connected to the I path of the mixer, and the other connected to the Q path of the mixer.

[0022] As a preferred embodiment, the digital processing module adopts a digital beamforming algorithm to form a specific beam for the low detectable signal through amplitude, delay, and phase shift weighted processing, so that the low detectable signal has the characteristics of high gain and low sidelobe to counter long-range detection equipment.

[0023] As a preferred embodiment, the microwave module adopts a single-pulse microwave module; the microwave operating frequency band is 10-12GHz in the X-band, the antenna is a single-pulse antenna, and it can perform 360° stereo detection. By adjusting the antenna angle, the direction of arrival of the radar signal can be accurately measured; the frequency coverage of the meter-wave module is the band below 2mm, the beam covers 360°, and the range of a single beam is 0.3°.

[0024] After adopting the above technical scheme, the beneficial effect of the present invention is as follows: in terms of signal processing capability, this scheme realizes comprehensive coverage of complex electromagnetic environments by integrating multi-band antennas and modules, greatly improving the detection range and accuracy of the system. This multi-band signal processing capability not only enhances the adaptability of the system, but also provides a richer and more accurate signal source for subsequent signal processing. A refined processing flow is adopted, including steps such as limiting, filtering, amplification, and frequency band down-conversion, to ensure the clarity and accuracy of the signal. This refined processing flow not only improves the signal-to-noise ratio of the signal, but also provides a more reliable signal basis for subsequent digital processing. The linear voltage regulator module performs two voltage reduction power supply to ensure the stable operation of each module. This optimized power management method not only improves the overall energy efficiency of the system, but also extends the service life of each module. Intelligent control of millimeter wave signals and microwave signals is realized by introducing an ARM processor. This intelligent control method not only improves the real-time performance and accuracy of the system, but also provides a broader space for subsequent system upgrades and expansions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in 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 only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 This is a module block diagram of the present invention. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example:

[0029] like Figure 1 As shown, the low radar observable anti-radiation module is a device that integrates advanced electronic countermeasure technology. It aims to enhance the concealment and survivability of military operations by reducing its own identifiability under radar detection while effectively receiving, processing and counterattacking the electromagnetic wave signals radiated by the adversary's radar. The core components of this module include millimeter wave antenna arrays, microwave antenna arrays, millimeter wave modules, microwave modules, power supply modules and digital processing modules. Each module works together to form an efficient and flexible anti-radiation system. The following will explain its working principle in detail, and demonstrate the operation process of this complex system through a specific working scenario. As a preferred embodiment, the anti-radiation module works in a millimeter wave working frequency band below 2mm, with a beam covering 360°, and a single antenna array beam range of 0.3°; the millimeter wave antenna array transmits the received electromagnetic wave signal to the millimeter wave module.

[0030] Millimeter wave antenna array: As the "eyes" of the system, the millimeter wave antenna array is first responsible for capturing electromagnetic wave signals in the environment, which may come from the opponent's radar system. The antenna array has high directionality and sensitivity, and can accurately lock the signal source. After receiving the signal, the millimeter wave antenna array not only passes the original signal to the millimeter wave module for processing, but also has the ability to convert 8-way microwave signals into millimeter wave signals and transmit them for active detection or interference. When these millimeter wave signals encounter a target (such as an opponent's radar) and are reflected back, the antenna array receives these reflected signals again to provide data for subsequent processing.

[0031] Millimeter wave module: After receiving the signal from the millimeter wave antenna array, the millimeter wave module first performs a limiting process to prevent signal overload; then removes noise and interference components through a filter, and then enhances the signal strength through an amplifier. After completing these pre-processing steps, the millimeter wave module down-converts the signal to the X-band, a frequency range more suitable for subsequent processing, and then outputs the processed signal to the microwave module.

[0032] Microwave antenna array: Similar to the millimeter wave antenna array, the microwave antenna array is also responsible for receiving electromagnetic wave signals in the environment and transmitting them to the microwave module. The difference is that the microwave antenna array may be used more to receive and process signals within a wider frequency band, increasing the flexibility of the system.

[0033] Microwave module: The microwave module receives the X-band signal from the microwave antenna array and the millimeter wave module, and also performs limiting, filtering and amplification. After that, it further down-converts the signal to the intermediate frequency, which is the frequency range that the digital processing module can efficiently process. The microwave module is also responsible for switching and attenuation control according to the control signal of the digital processing module to ensure the accuracy and flexibility of signal processing. The processed intermediate frequency signal is sent to the digital processing module for further analysis.

[0034] Power module: The power module uses a linear voltage regulator module to ensure stable and reliable DC 24V power supply for millimeter wave modules, microwave modules, digital processing modules, etc. Through two voltage reductions, the power module can meet the different voltage requirements of different modules and ensure the stable operation of the entire system.

[0035] Digital processing module: As the "brain" of the system, the digital processing module is responsible for attenuation control and switch control of the received electromagnetic wave signal to ensure the flexibility and accuracy of signal processing. More importantly, it sorts and identifies the intermediate frequency signal and uses advanced algorithms and technologies to calculate the angle information of the signal, which is the key data for determining the position of the opponent's radar. After completing the data processing, the digital processing module reports the results to the host computer for further analysis and decision-making. At the same time, it is also responsible for monitoring the working status of each module and reporting relevant information to the display and control system to ensure the overall performance and reliability of the system.

[0036] The millimeter wave antenna array and the microwave antenna array are activated at the same time to start receiving electromagnetic wave signals in the surrounding environment. Since the millimeter wave has a shorter wavelength and higher frequency, it can more accurately lock the signal emitted by the adversary's radar. At the same time, the microwave antenna array is responsible for capturing signals in a wider frequency band, increasing the system's information acquisition capabilities.

[0037] When the millimeter wave antenna array successfully captures the adversary radar signal, it immediately passes the signal to the millimeter wave module for processing. The millimeter wave module quickly limits, filters and amplifies the signal, then down-converts the signal to the X-band and passes it to the microwave module. After receiving the X-band signal, the microwave module also pre-processes it and further down-converts it to the intermediate frequency.

[0038] In the digital processing module, the intermediate frequency signal is sorted and identified, and the angle information of the signal is calculated through advanced algorithms. This information is crucial to determine the precise location of the opponent's radar. The digital processing module reports this data to the host computer, which combines other intelligence information to quickly formulate a counterattack plan.

[0039] At the same time, the digital processing module also issues control instructions to the microwave module and millimeter wave module as needed to adjust the signal attenuation and switch state to optimize the signal processing effect. The power supply module continues to provide stable power support for each module to ensure the efficient operation of the entire system. In the counterattack phase, we can use the millimeter wave and microwave signals emitted by the anti-radiation module to interfere with or destroy the enemy's radar. Because our module has low radar observability, it is difficult for the opponent's radar to accurately detect its existence, which greatly increases the suddenness and success rate of the counterattack.

[0040] The low radar observable anti-radiation module achieves accurate capture, analysis and counterattack of counter-radar signals through its highly integrated components and advanced signal processing algorithms.

[0041] There are 8 millimeter wave antenna arrays, and the millimeter wave antenna array uses a duplexer with a center frequency of 30 GHz, a right-hand polarization mode, and an insertion loss of less than 3 dB.

[0042] In radar and wireless communication systems, the millimeter wave antenna array, microwave module and digital processing module deployed by the preferred implementation method have demonstrated significant technological progress and practical application value. First of all, regarding the millimeter wave antenna array, 8 antenna arrays are configured, using a duplexer with a center frequency of 30GHz, right-hand polarization, and insertion loss less than 3dB. This design is particularly suitable for application scenarios that require high data transmission rates and low latency, such as 5G communications, communications between autonomous driving vehicles, and high-definition video transmission. Compared with existing technologies, this solution significantly enhances the stability and efficiency of signal transmission by improving frequency utilization efficiency and reducing signal loss, especially in complex urban environments. It can effectively penetrate obstacles and achieve stable connections. By optimizing the polarization method and reducing insertion loss, efficient utilization of limited spectrum resources is achieved, meeting the future needs of high-density and high-speed communications.

[0043] The microwave module includes 8 millimeter wave channels, each of which is composed of a low-noise amplifier, a mixer, a small signal amplifier, an attenuation control unit, and a digital logic unit; the digital processing module adopts an ARM processor, receives control signals from the outside, controls the attenuation amount and the switch state, and reports the working status data of each module to the display control; after receiving the control signal, the attenuation control unit outputs the control signal to the amplifier after voltage stabilization, and divides the maximum attenuation value of the attenuator into two paths, one connected to the I path of the mixer, and the other connected to the Q path of the mixer.

[0044] The design of the microwave module includes 8 millimeter wave channels, each of which integrates a low noise amplifier, a mixer, a small signal amplifier, an attenuation control unit and a digital logic unit. With the digital processing module with the ARM processor as the core, it not only realizes the fine control of the signal attenuation and the switch state, but also can report the system status in real time, enhancing the flexibility and maintainability of the system. This architecture is particularly suitable for radar detection, satellite communications and radio monitoring, where strict requirements and dynamic adjustments for signal quality are crucial. Compared with traditional technologies, its innovation lies in the integration of attenuation control and signal processing, which improves the integration and response speed of the system. At the same time, the introduction of the ARM processor enhances the data processing capability, allowing the system to adapt to environmental changes more intelligently and optimize performance.

[0045] The digital processing module adopts a digital beamforming algorithm to form a specific beam through amplitude, delay, and phase shift weighted processing of low detectable signals, so that the low detectable signals have the characteristics of high gain and low sidelobe to counter long-range detection equipment. The digital processing module adopts a digital beamforming algorithm to perform amplitude, delay, and phase shift weighted processing on low detectable signals to form a beam with high gain and low sidelobe characteristics, which effectively counters long-range detection equipment, which is of great significance in military stealth technology, counter-reconnaissance operations, and advanced security monitoring. The breakthrough of this technology lies in that the beam shape and direction are precisely controlled by digital means, which not only enhances the concealment and anti-interference ability of the signal, but also improves the accuracy and range of target identification. Compared with traditional analog beamforming, it has higher flexibility and accuracy.

[0046] The microwave module adopts a single-pulse microwave module; the microwave working frequency band is 10-12GHz in the X-band, and the antenna is a single-pulse antenna, which can perform 360° stereo detection. By adjusting the antenna angle, the direction of arrival of the radar signal can be accurately measured; the frequency coverage of the meter-wave module is the band below 2mm, the beam covers 360°, and the range of a single beam is 0.3°. The single-pulse microwave module works in the X-band, combined with the single-pulse antenna to achieve 360° stereo detection, and the meter-wave module covers the band below 2mm, with comprehensive beam coverage and high accuracy. These characteristics make this solution have unique advantages in radar detection, aerospace monitoring, meteorological observation and other fields. Especially in the target tracking and identification tasks in complex electromagnetic environments, by accurately measuring the arrival direction of radar signals, stable tracking of multiple targets and fast-moving targets is achieved, greatly improving the monitoring range and accuracy of the system. Compared with existing technologies, its creativity lies in combining the advantages of different frequency bands to achieve wide-band, high-precision all-round monitoring, while maintaining the low complexity and high reliability of the system, providing strong technical support for efficient monitoring in complex environments.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A low radar observable anti-radiation module, characterized in that: It includes a millimeter wave antenna array, a microwave antenna array, a millimeter wave module, a microwave module, a power module, and a digital processing module; and is characterized in that: The millimeter wave antenna array receives electromagnetic wave signals and transmits the electromagnetic wave signals to the millimeter wave module. The millimeter wave antenna array converts the 8-channel microwave signals into millimeter wave signals and transmits them, and receives the reflected millimeter wave signals. The millimeter wave module receives the electromagnetic wave signal, limits it, filters it, amplifies it, and then down-converts it to the X-band, and outputs it to the microwave module; the microwave antenna array receives the electromagnetic wave signal and transmits it to the microwave module; The microwave module limits, filters, and amplifies the electromagnetic wave signal and the X-band signal output by the millimeter wave module, converts them down to an intermediate frequency, and outputs them to the digital processing module; and receives the control signal from the digital processing module to perform switch switching and attenuation control, and sends the microwave signal and the millimeter wave signal to the limiter, filter, and amplifier, and then converts them down to an intermediate frequency, and then outputs them to the digital processing module; The power supply module adopts a linear voltage regulator module to step down the input DC 24V power supply twice to supply power to the millimeter wave module, microwave module and digital processing module respectively; The digital processing module attenuates and switches the received electromagnetic wave signals, sorts and identifies the intermediate frequency signals output by the microwave module, calculates the angle information, and then reports the data to the host computer for processing; the ARM processor completes the control of the millimeter wave signal and the microwave signal, and reports the working status data of each module to the display control.

2. A low radar observability anti-radiation module as claimed in claim 1, characterized in that: The anti-radiation module works in a millimeter wave working frequency band below 2 mm, with a beam covering 360° and a beam range of a single antenna array of 0.3°; the millimeter wave antenna array transmits the received electromagnetic wave signal to the millimeter wave module.

3. The low radar observability anti-radiation module according to claim 1, characterized in that: There are 8 millimeter wave antenna arrays, and the millimeter wave antenna array uses a duplexer with a center frequency of 30 GHz, a right-hand polarization mode, and an insertion loss of less than 3 dB.

4. The low radar observability anti-radiation module according to claim 1, characterized in that: The microwave module includes 8 millimeter wave channels, each of which is composed of a low-noise amplifier, a mixer, a small signal amplifier, an attenuation control unit, and a digital logic unit; the digital processing module adopts an ARM processor, receives control signals from the outside, controls the attenuation amount and the switch state, and reports the working status data of each module to the display control; after receiving the control signal, the attenuation control unit outputs the control signal to the amplifier after voltage stabilization, and divides the maximum attenuation value of the attenuator into two paths, one connected to the I path of the mixer, and the other connected to the Q path of the mixer.

5. The low radar observability anti-radiation module according to claim 1, characterized in that: The digital processing module adopts a digital beamforming algorithm to form a specific beam for the low detectability signal through amplitude, delay, and phase shift weighted processing, so that the low detectability signal has the characteristics of high gain and low side lobe to counter the long-range detection equipment.

6. The low radar observability anti-radiation module according to claim 1, characterized in that: The microwave module adopts a single-pulse microwave module; the microwave working frequency band is 10-12GHz in the X-band, the antenna is a single-pulse antenna, and it can perform 360° stereo detection. By adjusting the antenna angle, the direction of arrival of the radar signal can be accurately measured; the frequency coverage of the meter-wave module is the band below 2mm, the beam covers 360°, and the range of a single beam is 0.3°.

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