Design of a Small Step Frequency Synthesizer at C-band
Chang‐Ming Chen · Keisou gijutsu · 2007
A small step's frequency synthesizer based on multiple-loop phased-lock and DDS methods was proposed in this paper.Using injection-locked approach,a reference source with high stability and low phased noise was designed.Both 10MHz and 100MHz phased-lock loops were used for improving the performance of the system.The frequency synthesizer can provide a small step's frequency of 1.0kHz in 4.6～5.3GHz.The measured results shows the performances of high purity spectrum,low phased noise,low spurious level,and satisfies the requirements for the practical system.