Design Of Power Module And Interface Board For SAR Real-time Imaging Processor On VPX Standard

This paper presents a method to make the Radar have the ability to obtain the high imaging resolution. This method is about using small antenna moving in constant speed along the long line array and radiating the coherent signal and then coherent processing the echo signals which are received in different positions. The method me ntioned above is named Synthetic Aperture Radar(SAR). SAR system is developed from single polarization, single band, fixed angle of incidence and single operation mode to multi po larization, multi band, multi incident angle, multi working mode and multi platform direction. With the development of the SAR, the real-time signal processor are more widely used.First of all, this dissertation shows the research background and development of the SAR real-time imaging processor status quo, and then introduces the basic composition of SAR real-time imaging processor, realize the function, performance index and VPX high-speed serial bus technology.Secondly, it analyses demand of the power board in the real-time imaging processor. The dissertation also introduces the power supply for the board design process and improvement of the power board in detail. Firstly, it has carried on the power supply of the chip device selection, and then draw the power board schematic and PCB board including laminated structure interface card layout rules, etc. Finally, it verifies the board output voltage meet its performance indexes. Improvements to the power supply board mainly includes the control of the power supply chip and the standardization of interface devices. It also increases the power card by the output voltage of electric current, finally verify the improved power supply boards meet its performance indexes.What is more, the demand analysis of interface card in real-time imaging processor and the introduction of the design process of the interface board are also included in this paper. Firstly, I have carried on the interface board device selection, including power conversion, control chip FPGA and D/A conversion chip. Next, I have designed the board points module schematic and PCB board, which is mainly divided into the power supply module, control module, digital- to-analog conversion module and Ethernet interface module. Finally, I have verified the basic function of the interface board, mainly for digital- to-analog conversion and Ethernet communication realization.Finally, the paper summarizes all the design work including understanding of SAR real-time imaging processing technology a nd the board design process and the debugging process.