Frequency-agile, multi-channel, microwave frequency synthesizer

摘要: A multi-channel frequency synthesizer, including a crystal oscillator circuit that may be selectively operated to provide reference signal at selected is one of given plural number frequencies; an IF generator for processing the intermediate submultiples frequency; comb signals separated from each other by and phase-locked loop. The loop includes voltage controlled providing output synthesizer microwave directional coupler coupled sample phase signal; mixer mixing with plurality upper lower sideband respect are detector comparing closest thereby comparison signal. further range selector control representative different ranges; summing device means combining tune frequency.