Abstract: With powerful function and high performance of radar system required in modern war, the signal generator，as a key component of the radar system, is facing more challenges. Aimming at the difficulties about the dynamic target simulation on radar test, a new design method of radar signal generator based on CPLD is proposed. The signal generator adopts the complex programmable logic device (CPLD),and uses the dial code switching to generate complex combinatory logic succession which can control radar waveform producer and the frequency synthesizer for generating many kinds of high frequency target echo signal to simulate actual target on air. The complete function inspection and testing of radar were achieved while the radar transmitter is not opened. The simulated target echo signals were tested , showing that this system meets the design requirements.

Key words: Radar, Signal generator, CPLD, Target echo