X-Band Frequency Synthesizer Based on DDS Technique
Hu Xiao · Radar & Ecm · 2001
The fundamental principle and the clutter distributing of direct digital synthesis(DDS) are introduced. The major factors that influence the clutter are analyzed. An implementation scheme and some experimental results of an X band frequency synthesizer using DDS technique are presented. The synthesizer can generate a signal with a bandwidth of 1GHz,step frequency of 1MHz, phase noise of 105dBc/Hz at an offset of carrier frequency of 1kHz and wide band clutter rejection superior to 60dB. So it is characterized by wide band, low phase noise, excellent clutter rejection and small step frequency.