电讯技术2018，Vol.58Issue(2)：219-224,6.DOI:10.3969/j.issn.1001-893x.2018.02.018
一种高频谱纯度的C频段宽带频率合成器设计
Design of a High Spectral Purity C-band Frequency Synthesizer
摘要
Abstract
A novel multistage sub-harmonic frequency-mixing phase locked loop(PLL) is provided to im-prove frequency synthesizer's spectral purity.Based on this method,an ultra- low phase noise frequency synthesizer is developed.The design of the frequency synthesizer is introduced and key technologies are an-alyzed.The main performance such as phase noise and spurious suppression is simulated and demonstra-ted.Finally,the C-band frequency synthesizer is measured.The synthesizer covers frequency from 4 500 MHz to 7 500 MHz with less 1 kHz step size.The measured phase noise at an output frequency of 7.49 GHz at 25 kHz offset is-123 dBc/Hz.Spurs do not exceed the 70 dB level and the switching time is less than 75 μs.The design scheme is more reasonable and feasible.With a small step size,fast frequency switching speed,low phase noise and low spurious characteristics,the synthesizer can be used in high per-formance electronic warfare receivers and has a broad application prospect.关键词
电子战接收机/宽带频率合成器/C频段/多级子谐波混频/高纯度Key words
warfare receiver/wideband frequency synthesizer/C-band/multistage sub-harmonic frequency-mixing/high spectral purity分类
信息技术与安全科学引用本文复制引用
周叶华,叶宝盛,程明,钱焕裕..一种高频谱纯度的C频段宽带频率合成器设计[J].电讯技术,2018,58(2):219-224,6.基金项目
国防重点实验室基金(9140C130201150C13065) （9140C130201150C13065）
