The Research And Design Of A Kind Of Aircraft Radar Target Simulator

As a new radar equipment, radar target simulator is used to emulate and stimulate the variety of radar target echo signals. It is an effective equipment to detect radar performance and train radar manipulator. With the development and widely application of computer technology, IC manufacture technology, microwave radio technology in present radar technology, radar technology changes obviously. Radar target is a new radar equipment according to this change.Beginning of the introduction of aircraft radar knowledge and the methods of target echo stimulator, this article explains the composition of an aircraft radar target simulator, working theory and the design process of all key modules. Based on the theory of coherent echo signal stimulation and the high performance MCU and PLD, the design of the video process and control modules of aircraft radar target simulator is accomplished successfully and solves the problem of video echo edge dither and the serious error of target distance stimulation in the traditional way. According to the relationship between target speed and Doppler frequency shift, the design of radar target simulator's intermediate frequency Doppler module has been successfully finished and the stimulation of target is realized With the method of direct digital frequency synthesis and PLL control, high spectrum purity and high frequency stability have been realized to the requirement of signal system of radar target simulator. System reliability and stability has been enhanced with the application of the microwave and radio module of high integration and low temperature drift.