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Multi-channel radio frequency direct acquisition and generation circuit applied to phased array radar

A phased array radar and radio frequency direct acquisition technology, applied in the field of digital systems, can solve problems such as no reasonable solutions, and achieve the effects of ensuring quality, satisfying beam pointing, and avoiding frequency conversion loss

Inactive Publication Date: 2019-06-14
NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At this stage, RF direct sampling and RF direct generation under 2GHz have been realized, but there is no reasonable solution for multi-channel RF direct sampling and RF direct generation digital systems for phased array radar applications

Method used

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  • Multi-channel radio frequency direct acquisition and generation circuit applied to phased array radar
  • Multi-channel radio frequency direct acquisition and generation circuit applied to phased array radar

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0017] see figure 1 , the digital system of the multi-channel synchronization method of the phased array radar includes n digital components (each digital component includes 4 channels of signal acquisition ADC channels and 4 channels of signal generation DAC channels) and a common board.

[0018] see figure 2 , the digital components include radio frequency generation and sampling modules, clock management and matching delay units and storage processing modules. Among them, the clock management and matching delay unit is mainly used to generate the ADC / DAC clock and low-frequency clock signal required by the radio frequency generation and sampling module; the radio frequency generation and sampling module is mainly used to realize the direct generation and direct samplin...

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Abstract

The invention provides a multi-channel radio frequency direct acquisition and generation circuit applied to phased array radar. A clock management and matching delay unit generates an ADC / DAC clock and a low-frequency clock signal. The radio frequency generation and sampling module is used for realizing direct generation and direct sampling of radio frequency signals. The storage processing modulereceives and stores the original data sampled by the AD through the FPGA, extracts and filters the data in the FPGA, and realizes transmission of a digital signal between the FPGA and the DA throughthe FPGA. And the master module receives the control signal of the system to generate a synchronization signal and a reset signal, so that the synchronization signal and the reset signal are transmitted to the slave modules through the common board to control the synchronization and reset functions of the AD / DA chips in all the slave modules while the transmitting and receiving synchronization inthe master module is realized. According to the invention, the frequency conversion loss of the system is avoided, the signal quality is ensured, and the requirements of radar system beam pointing, high-efficiency spatial power synthesis and multi-channel receiving and transmitting synchronization are met.

Description

technical field [0001] The invention relates to a digital system, which is mainly aimed at direct acquisition and generation of multi-channel radio frequency in P-L band, and can realize multi-channel synchronization of active phased array radar and digital array radar antenna front. Background technique [0002] Active phased array radar and digital array radar antenna arrays are composed of multiple TR channels. Generally, active phased array radar transmit and receive timing control and beam pointing control are executed and realized by TR components. The generation of the launch waveform and the AD conversion of the echo of the digital array radar are also realized by the digital TR component. Therefore, the problem of high-precision synchronization of multi-channel digital TR is introduced, including the synchronization between multi-channel digital waveform generators, the synchronization between multi-channel digital sampling and holding, and the synchronization betwe...

Claims

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Application Information

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IPC IPC(8): H04B1/00G01S7/03
Inventor 季帅王敬东关炀王轶
Owner NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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