Design of the L-band wideband LFM signal generator based on DDS and frequency multiplication

Abstract

Wideband linear frequency modulated (LFM) signal is widely used in precise distance measuring radar system. As traditional methods of generating LFM signal have a lot of disadvantages such as instability and nonlinearity we propose a different solution to wideband LFM signal generator in L-band based on DDS and frequency multiplication. The proposed method produces the baseband LFM signal using the DDS, and then adds the baseband signal into the frequency multiplication system; last we can achieve a pure L-band wideband LFM signal. The measurement result shows that the proposed can fulfill each requirement of anticipant satisfactorily.