The working parameters of a third-order loop are deduced based on the analysis of a millimeter band digital phase-locked loop. A digital phase-locked 8 mm Gunn oscillator with a heterodyne-loop structure is designed. It is shown by the measurements that the performance of this loop is quite satisfactory. It has the characteristics of being easily locked and having a pure spectrum.
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叶华 骆永健.数字鉴相稳频的8mm固态源[J].红外与毫米波学报,1994,13(4):317~320]. Ye Hua, Luo Yongjian, Lin Zhencai, Luo Guixiang. A DIGITAL PHASE LOCKED 8 mm SOLID STATE SOURCE[J]. J. Infrared Millim. Waves,1994,13(4):317~320.]