Microwave phased array radar synthetic beam calibrator
By designing a microwave phased array radar synthetic beam calibrator, using the method of collaborative work of multiple modules, the problems of low beam calibration efficiency and high cost in the prior art are solved, and efficient and accurate beam calibration is achieved.
Patent Information
- Application Number
- CN202420777262.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-04-16
AI Technical Summary
Existing microwave phased array radars have problems of low efficiency and high cost during beam calibration, making it difficult to achieve efficient and accurate phase and amplitude correction.
A microwave phased array radar synthetic beam calibrator was designed, and the system includes a microwave receiving module, an intermediate frequency signal processing module, a digital signal processing module, a slide rail movement control module, a storage module, a communication module and a power supply module, through the coordination of these modules Work to achieve automated beam calibration.
Improves the calibration efficiency of microwave phased array radar, reduces costs, and achieves efficient and accurate beam calibration.
Smart Images
Figure CN222461670U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of microwave radar security, in particular to a microwave phased array radar synthetic beam calibrator. Background Art
[0002] Due to the existence of processing errors in the production process of microwave boards, the phase and amplitude of microwave signals are affected to varying degrees, resulting in inconsistent phase and amplitude between the same batch or different batches, and different phase shifts and amplitude corrections required for the synthetic beam.
[0003] In order to more efficiently and accurately calibrate the phase and amplitude of each beam of a microwave phased array radar, calibration is usually performed by measuring the directional pattern after each phase shift. However, this calibration method is difficult, costly, and inefficient. Utility Model Content
[0004] The utility model provides a microwave phased array radar synthetic beam calibrator to improve the calibration efficiency of the microwave phased array radar and reduce the cost.
[0005] The utility model provides a microwave phased array radar synthetic beam calibrator, the system comprises a microwave receiving module, an intermediate frequency signal processing module, a digital signal processing module, a slide rail movement control module, a storage module, a communication module, and a power supply module.
[0006] The microwave receiving module is used to down-convert the microwave signal received by the antenna into an intermediate frequency signal and transmit it to the intermediate frequency signal processing module.
[0007] The intermediate frequency signal processing module is used to amplify, filter, and perform analog-to-digital conversion on the signal down-converted by the microwave receiving module and then transmit the amplified signal to the digital signal processing module.
[0008] The slide rail movement control module is used to control the angle of the slide rail and transmit the angle information to the digital signal processing module.
[0009] The storage module is used to store information such as amplitude and phase.
[0010] The communication module is used to communicate with the host computer software.
[0011] The power supply module is used to provide the required power to the microwave receiving module, the intermediate frequency signal processing module, the digital signal processing module, the slide rail control module, the storage module, and the communication module.
[0012] Furthermore, the microwave receiving module includes an LNA, a microwave source, a mixer and a clock source.
[0013] The LNA is used to perform low-noise amplification on the received signal and transmit the signal to the mixer.
[0014] The microwave source is used to provide a base frequency to the mixer.
[0015] The mixer is used to down-convert the microwave signal into an intermediate frequency analog signal.
[0016] The clock source is used to provide a clean frequency reference signal to the microwave source.
[0017] Furthermore, the power supply module includes a switching power supply, a digital linear power supply, an analog linear power supply, and a microwave linear power supply.
[0018] The switching power supply is connected to an external input DC power supply and is used to convert the external power supply into the power required by the microwave phased array radar synthetic beam calibrator.
[0019] The digital linear power supply is used to receive the output voltage of the switching power supply and convert it into the power required by the digital signal processing module, the storage module, the communication module, and the slide rail movement control module.
[0020] The analog linear power supply is used to receive the output voltage of the switching power supply and convert it into the power required by the intermediate frequency signal processing module.
[0021] The microwave linear power supply is used to receive the output voltage of the switching power supply and convert it into the power required by the microwave receiving module. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is an overall schematic diagram of a microwave phased array radar synthetic beam calibrator provided by the utility model example.
[0023] Figure 2 This is the preferred structure of the microwave phased array radar synthetic beam calibrator provided by the utility model.
[0024] Figure 3 This is a working flow chart of a microwave phased array radar synthetic beam calibrator provided by the utility model example. DETAILED DESCRIPTION
[0025] The utility model is further described below in conjunction with the accompanying drawings and examples.
[0026] Figure 1 The overall architecture diagram of the microwave phased array radar synthetic beam calibrator provided by the embodiment of the utility model is given as follows: Figure 1As shown, the microwave phased array radar synthetic beam calibrator includes a microwave receiving module 1, an intermediate frequency signal processing module 2, a digital signal processing module 3, a slide rail movement control module 5, a storage module 4, a communication module 6, and a power module 7. The microwave receiving module 1 is used to down-convert the microwave signal received by the antenna into an intermediate frequency signal and transmit it to the intermediate frequency signal processing module 2. The intermediate frequency signal processing module 2 is used to amplify, filter, and convert the signal down-converted by the microwave receiving module 1 into an analog-to-digital signal and then transmit it to the digital signal processing module 3. The slide rail movement control module 5 is used to control the angle of the slide rail and transmit the angle information to the digital signal processing module 3. The storage module 4 is used to store information such as amplitude and phase. The communication module 6 is used to communicate with the upper computer software. The power module 7 is used to provide the required power to the microwave receiving module 1, the intermediate frequency signal processing module 2, the digital signal processing module 3, the slide rail control module 5, the storage module 4, and the communication module 6.
[0027] In the above embodiment, Figure 2 As shown, the microwave receiving module 1 includes an LNA 11, a microwave source 13, a mixer 12 and a clock source 14. The LNA 11 is used to perform low-noise amplification on the received signal and transmit the signal to the mixer 12, the microwave source 13 is used to provide a base frequency to the mixer 12, the mixer 12 is used to down-convert the microwave signal into an intermediate frequency analog signal, and the clock source 14 is used to provide a clean frequency reference signal to the microwave source 13.
[0028] In the above embodiment, Figure 2 As shown, the intermediate frequency signal processing module includes an amplifier 21, a filter 22 and an AD 23. The amplifier 21 is used to amplify the intermediate frequency signal after the mixer 12 down-converts, the filter 22 is used to filter the signal amplified by the amplifier 21, and the AD 23 is used to perform analog-to-digital conversion on the signal filtered by the filter 22.
[0029] In the above embodiment, Figure 2As shown, the power supply module 7 includes a switching power supply 71, a digital linear power supply 73, an analog linear power supply 74, and a microwave linear power supply 72. The switching power supply 71 is connected to an external input DC power supply, and is used to convert the external power supply into the power required by the microwave phased array radar synthetic beam calibrator. The digital linear power supply 73 is used to receive the output voltage of the switching power supply, and convert it into the power required by the digital signal processing module 3, the storage module 4, the communication module 6, and the slide rail movement control module 5. The analog linear power supply 74 is used to receive the output voltage of the switching power supply 71, and convert it into the power required by the intermediate frequency signal processing module 2. The microwave linear power supply 72 is used to receive the output voltage of the switching power supply 71, and convert it into the power required by the microwave receiving module 1.
[0030] The following is the working process of the microwave phased array radar synthetic beam calibrator provided by the utility model.
[0031] Figure 3 The working flow chart of microwave phased array radar synthetic beam calibrator is given, as shown in Figure 3 As shown, the process is described in detail as follows.
[0032] Step 301: Parameter initialization. The initialized parameters include clock, interrupt, I / O port, ADC, UART and calibration algorithm related parameters.
[0033] Step 302: Receive and parse the host computer software command parameters (Ɵstart, Ɵend, ΔƟ), where Ɵstart is the start position of the entire beam measurement, Ɵend is the end position of the beam, and ΔƟ is the width of each beam.
[0034] Step 303: Control the slide rail to Ɵstart+nΔƟ and perform signal measurement, where n is used to identify the beam position currently being measured.
[0035] Step 304: Send the current status and request the host computer to control the radar beam to be measured to deflect to the current measurement angle.
[0036] Step 305: Record the peak value of each step angle measurement within ΔƟ and store it in flash.
[0037] Step 306: Calculate the directivity diagram, amplitude calibration value and phase calibration value of this measurement, and transmit them back to the host computer.
[0038] Step 307 , determine whether all measurements are completed, if yes, execute step 308 , if not, execute step 303 .
[0039] Step 308: All measurements are completed, and this measurement work ends.
[0040] The microwave phased array radar synthetic beam calibration device provided by the utility model has low cost and high automation, and greatly improves the beam calibration efficiency.
[0041] The above description is a preferred embodiment of the present invention and does not limit the present invention. For those skilled in the art, modifications and equivalent substitutions made without departing from the principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A microwave phased array radar synthetic beam calibrator, characterized in that: The system includes a microwave receiving module, an intermediate frequency signal processing module, a digital signal processing module, a slide rail movement control module, a storage module, a communication module, and a power module. The microwave receiving module is used to down-convert the microwave signal received by the antenna into an intermediate frequency signal and transmit it to the intermediate frequency signal processing module. The intermediate frequency signal processing module is used to amplify, filter, and perform analog-to-digital conversion on the signal down-converted by the microwave receiving module and then transmit it to the digital signal processing module. The slide rail movement control module is used to control the angle of the slide rail and transmit the angle information to the digital signal processing module. The storage module is used to store amplitude and phase information. The communication module is used to communicate with the upper computer software. The power module is used to provide the required power to the microwave receiving module, the intermediate frequency signal processing module, the digital signal processing module, the slide rail control module, the storage module, and the communication module.
2. The microwave phased array radar synthetic beam calibrator according to claim 1, characterized in that: The microwave receiving module includes an LNA, a microwave source, a mixer and a clock source. The LNA is used to perform low-noise amplification on the received signal and transmit the signal to the mixer. The microwave source is used to provide a base frequency to the mixer. The mixer is used to down-convert the microwave signal into an intermediate frequency analog signal. The clock source is used to provide a clean frequency reference signal to the microwave source.
3. The microwave phased array radar synthetic beam calibrator according to claim 1, characterized in that: The intermediate frequency signal processing module includes an amplifier, a filter and an AD, wherein the amplifier is used to amplify the signal down-converted by the microwave receiving module, the filter is used to filter the signal amplified by the amplifier, and the AD is used to perform analog-to-digital conversion on the signal filtered by the filter.
4. The microwave phased array radar synthetic beam calibrator according to claim 1, characterized in that: The power supply module includes a switching power supply, a digital linear power supply, an analog linear power supply, and a microwave linear power supply. The switching power supply is connected to an external input DC power supply and is used to convert the external power supply into the power required by the microwave phased array radar synthetic beam calibrator. The digital linear power supply is used to receive the output voltage of the switching power supply and convert it into the power required by the digital signal processing module, the storage module, the communication module, and the slide rail movement control module. The analog linear power supply is used to receive the output voltage of the switching power supply and convert it into the power required by the intermediate frequency signal processing module. The microwave linear power supply is used to receive the output voltage of the switching power supply and convert it into the power required by the microwave receiving module.