An airborne radar beacon signal simulation test module
By designing a miniaturized airborne radar beacon signal simulation test module, the problems of existing testing methods being limited to a single phase, large in size, and poor adaptability to complex environments have been solved, thus achieving miniaturization and efficient testing of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING LANGCHI RUITAI ELECTRONIC INFORMATION TECH CO LTD
- Filing Date
- 2025-08-11
- Publication Date
- 2026-07-21
AI Technical Summary
Existing methods for simulating and testing airborne radar beacon signals are limited in scope and size, making them inflexible in adapting to complex testing environments. They also require a large number of personnel, resulting in difficulties, long setup times, and high costs associated with building testing environments.
A miniaturized airborne radar beacon signal simulation test module was designed. It adopts miniaturized system integration technology and is integrated into a standard chassis of CPCI, PXI, VPX, 19-inch 1U and above. It has strong compatibility, channel self-test function, and can perform equipment working link check and fault diagnosis.
It has achieved miniaturization of equipment, adaptability to multiple scenarios, simplified the setup of the testing environment, reduced personnel requirements and capital investment, and improved testing efficiency and accuracy.
Smart Images
Figure CN224536170U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fire control radar, specifically an airborne radar beacon signal simulation test module. Background Technology
[0002] Airborne radar is a general term for various radars installed on aircraft. Airborne radar is mainly used to control and guide weapons, conduct air surveillance and reconnaissance, and ensure accurate navigation and flight safety. The airborne radar beacon signal simulation test module is a core component of a certain airborne Doppler fire control radar. Its function is to perform necessary beacon function and performance checks before the mission is executed, and to check whether the radar equipment has the basic ability to complete the mission in BCN mode.
[0003] With the development of radar equipment in China, the demand for functional performance testing of beacon signal simulation is increasing. Currently, existing beacon target testing methods are limited in scope and large in size, making them unable to flexibly adapt to complex testing environments. Previous testing systems required a large number of personnel and support from different fields within the system, resulting in difficulties in setting up the testing environment, long testing times, a large number of personnel to coordinate, and high costs, which greatly increased the difficulty of testing. Summary of the Invention
[0004] The purpose of this invention is to provide an airborne radar beacon signal simulation test module to solve the problems mentioned in the background art, such as the existing beacon target testing methods being single-faceted, large in size, unable to flexibly adapt to complex testing environments, requiring a large number of personnel and support from different fields within the system, resulting in difficulties in setting up the testing environment, long testing time, a large number of personnel to coordinate, and high costs, which bring great difficulties to the testing.
[0005] The technical solution of this utility model is implemented as follows: an airborne radar beacon signal simulation test module includes a cavity structure. A beacon response signal channel is installed on the top of the cavity structure, and a top cover plate covers the beacon response signal channel. A control interface is installed on one side of the cavity structure, and a beacon receiving interface, a local oscillator input interface, and a beacon transmitting interface are provided on the other side of the cavity structure. A control circuit, a detection circuit, an amplitude modulation circuit, an encoded signal generation circuit, a switching modulation circuit, and a power supply board are installed in the cavity inside the cavity structure. A bottom cover plate is installed at the bottom of the cavity structure.
[0006] Preferably, the upper cover plate is bonded to the cavity structure with insulating adhesive, and the lower cover plate is bonded to the cavity structure with insulating adhesive.
[0007] Preferably, the parameter analysis of the detection circuit mainly consists of a detector, an FPGA processing module, a memory, and a bandpass filter module.
[0008] Preferably, the beacon response signal channel uses a cavity structure with low phase noise and high frequency stability output by a temperature-controlled crystal oscillator with a reference frequency of 0MHz.
[0009] Preferably, the distance delay function in the encoded signal generation circuit achieves the delay of the response distance signal under parameter control.
[0010] Preferably, the control circuit and the control interface integrate complete system communication, protocol parsing, self-testing, status transmission, and system status control.
[0011] Preferably, a high-isolation single-pole single-throw switch is placed in the switching modulation circuit.
[0012] By adopting the above technical solution, the beneficial effects of this utility model are as follows: This airborne radar beacon signal simulation test module adopts miniaturized system integration technology, resulting in a small device size and diverse application scenarios. It is not limited by site and can be integrated into CPCI, PXI, VPX, 19-inch 1U and larger standard chassis, or used independently with an external microwave antenna. The test objects cover all airborne radars in a certain frequency band, with strong compatibility, and can meet the test range of most devices under test. The module can perform channel self-test (BIT), and the self-test function includes checking the device's working link, diagnosing and locating loop faults, and determining its status (working, not working, or degraded performance) in a timely and accurate manner and isolating its internal faults. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0014] Figure 1 This is an exploded view of the present invention; Figure 2 This is a schematic diagram view of the analog function of this utility model; Figure 3 This is a signal simulation diagram of the present invention; Figure 4 This is a view of the signal waveform of this utility model; Figure 5 This is a schematic view of the signal of this utility model; Figure 6 This is a schematic diagram illustrating the principle of this utility model.
[0015] The components are: 1. Top cover plate; 2. Beacon response signal channel; 3. Beacon receiving interface; 4. Local oscillator input interface; 5. Beacon transmitting interface; 6. Control circuit; 7. Detector circuit; 8. Amplitude modulation circuit; 9. Encoded signal generation circuit; 10. Cavity structure; 11. Control interface; 12. Switching modulation circuit; 13. Power supply board; 14. Bottom cover plate. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0017] See Figure 1 An airborne radar beacon signal simulation test module includes a cavity structure 10, a beacon response signal channel 2 installed on the top of the cavity structure 10, an upper cover plate 1 covering the beacon response signal channel 2, a control interface 11 installed on one side of the cavity structure 10, a beacon receiving interface 3, a local oscillator input interface 4 and a beacon transmitting interface 5 provided on the other side of the cavity structure 10, a control circuit 6, a detection circuit 7, an amplitude modulation circuit 8, an encoded signal generation circuit 9, a switching modulation circuit 12 and a power supply board 13 installed in the cavity inside the cavity structure 10, and a lower cover plate 14 installed at the bottom of the cavity structure 10.
[0018] like Figure 1 As shown, the upper cover plate 1 is bonded to the cavity structure 10 with insulating adhesive, and the lower cover plate 14 is bonded to the cavity structure 10 with insulating adhesive. This arrangement provides the necessary support structure for this module through the upper cover plate 1, cavity structure 10 and lower cover plate 14, ensuring the stability of this module during transportation, storage and use.
[0019] like Figure 3 As shown, the parameter analysis of the detection circuit 7 mainly consists of a detector, an FPGA processing module, a memory, and a bandpass filter module. This setup allows the interrogation signal waveform of the radar signal to be detected according to the control of the control module. The FPGA receives the detected signal from the detector, calculates the absolute value of the digital detected signal within the FPGA, converts the input sine wave signal into a unipolar signal, and then performs low-pass filtering on the signal to obtain the level of the pulse signal. The signal waveform is then delayed according to the detected pulse to achieve data analysis.
[0020] like Figure 2As shown, beacon response signal channel 2 uses a low-phase-noise, high-frequency-stability cavity structure with a temperature-controlled crystal oscillator output. Based on 100MHz, it utilizes a PLL to generate a transmit point frequency signal. This signal passes through a coupler, and after amplification and low-pass filtering, it serves as the local oscillator signal for the receive channel. The output path passes through an amplifier, SPST, digitally controlled attenuator, bandpass filter, and coupler to output a transmit pulse modulation signal. This signal then passes through detection, amplification, and comparison in the coupling path to output an answer pulse modulation signal. This signal is introduced into the FPGA, where it undergoes pulse broadening processing to output a TTL level signal, which serves as the detection signal for the transmit channel. The inherent high isolation of the device is used to avoid crosstalk between the transmit and receive signals. Its functional principle is as follows: Figure 1 As shown.
[0021] like Figure 4 , Figure 5 As shown, the encoding signal generation circuit 9 is mainly composed of modules such as FPGA processor and memory. This configuration allows the FPGA processor to generate response encoding signals with a special arrangement format. The distance delay function, under signal control, realizes the delay of the response distance signal.
[0022] like Figure 6 As shown, the control circuit 6 and control interface 11 integrate complete system communication, protocol parsing, self-testing, status transmission, and system status control. This setup ensures the consistency between the target pulse and the radar pulse, and calculates the simulated parameters of the current response signal, ensuring synchronization between the current state and the simulated signal. It also allows editing databases of various coded response signals at different distances, amplitudes, and other parameters. By setting the corresponding interfaces, operations such as adding, deleting, inserting, and sorting can be performed on the database. The control circuit 6 refers to the circuit used for the control (including detection) of mechanical and electrical equipment. It has wide applications in various electrical devices, and its specific structure and circuit connection methods vary depending on the requirements, which will not be elaborated here.
[0023] like Figure 6 As shown, a high-isolation single-pole single-throw switch is placed in the switch modulation circuit 12. This configuration allows the receiver channel's detection pulse signal to be used as a synchronous trigger signal. Based on the control code written by the host computer, the required pulse modulation signal is generated to control the single-pole single-throw switch and output the required response modulation pulse signal.
[0024] Working Principle: In this device, the beacon receiver inside the beacon receiver interface 3 on the front panel receives the radar interrogation signal. The signal is then transmitted to the beacon response signal channel 2 inside the module. The transmit / receive switch function inside the beacon response signal channel 2 processes the signal through a circulator and isolator, converting the received radar interrogation signal through a bandpass filter, amplifier, mixer, intermediate frequency filter, and intermediate frequency amplifier. This converts the received signal once, outputting an intermediate frequency signal, which then passes through a detector and comparator to output a pulse signal. This pulse signal is then introduced to the FPGA's I / O as a synchronization trigger signal for the transmitted modulation pulse, and simultaneously outputs another pulse. The detection signal is pulse-widened internally by the FPGA and output as a TTL level signal, which serves as the detection signal for the receiving channel. After undergoing a series of signal processing steps, including frequency conversion, signal processing, and detection comparison, the beacon response signal is generated in the beacon response signal channel 2. This signal is then sent to the radar receiver via the beacon transmission interface 5 located on the front panel, completing the beacon function test for both indoor and outdoor applications. During this process, the power board 13 provides the necessary power to the module, while the upper cover 1, cavity structure 10, and lower cover 14 provide the necessary support structure to ensure the stability of the module during transportation, storage, and use.
[0025] In this specification, the terms "connection," "installation," "fixing," and "setting" are interpreted broadly. For example, "connection" can mean a fixed connection or an indirect connection via an intermediate component without affecting the relationship between components and the technical effect. It can also mean an integral connection or a partial connection. In such cases, those skilled in the art can understand the specific meaning of the above terms in this utility model or utility model according to the specific circumstances. In this utility model, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for better describing this utility model and its embodiments and are not intended to limit the indicated device, element, or component to having a specific orientation or to be constructed and operated in a specific orientation. Finally, it should be noted that when describing the position of each component and the matching relationship between them, this utility model usually uses one or a pair of components as examples. However, those skilled in the art should understand that such positions and matching relationships also apply to other components / other pairs of components.
[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An airborne radar beacon signal simulation test module, characterized in that: The cavity structure (10) includes a cavity structure (10), a beacon response signal channel (2) is installed on the top of the cavity structure (10), a top cover plate (1) is covered on the top of the beacon response signal channel (2), a control interface (11) is installed on one side of the cavity structure (10), a beacon receiving interface (3), a local oscillator input interface (4) and a beacon transmitting interface (5) are provided on the other side of the cavity structure (10), a control circuit (6), a detector circuit (7), an amplitude modulation circuit (8), an encoded signal generation circuit (9), a switching modulation circuit (12) and a power supply board (13) are installed in the cavity inside the cavity structure (10), and a bottom cover plate (14) is installed on the bottom of the cavity structure (10).
2. The airborne radar beacon signal simulation test module according to claim 1, characterized in that: The upper cover plate (1) is bonded to the cavity structure (10) with insulating adhesive, and the lower cover plate (14) is bonded to the cavity structure (10) with insulating adhesive.
3. The airborne radar beacon signal simulation test module according to claim 1, characterized in that: The parameter analysis of the detection circuit (7) mainly consists of a detector, an FPGA processing module, a memory, and a bandpass filter module.
4. The airborne radar beacon signal simulation test module according to claim 1, characterized in that: The beacon response signal channel (2) adopts a low phase noise, high frequency stability cavity structure (10) with a temperature-controlled crystal oscillator output as the reference 0MHz.
5. The airborne radar beacon signal simulation test module according to claim 1, characterized in that: The distance delay function in the encoded signal generation circuit (9) delays the response distance signal under parameter control.
6. The airborne radar beacon signal simulation test module according to claim 1, characterized in that: The control circuit (6) and the control interface (11) integrate complete system communication, protocol parsing, self-testing, status transmission and system status control.
7. The airborne radar beacon signal simulation test module according to claim 1, characterized in that: A high-isolation single-pole single-throw switch is placed in the switching modulation circuit (12).