A frequency agility synthesizer with low phase noise for fully electronic millimeter wave imaging

被引：0
作者：
Fang C. [1 ,2 ]
Huang B. [1 ,2 ]
Wu L. [1 ]
Sun X. [1 ]
机构：
[1] Key Laboratory of Terahertz Solid-State Technology of Chinese Academy of Sciences, Shanghai Institute of Microsystem and Information Technology (SIMIT), Shanghai
[2] University of Chinese Academy of Sciences, Beijing
来源：
Progress In Electromagnetics Research C | 2019年 / 91卷
基金：
中国国家自然科学基金;
关键词：
Direct digital synthesis - Frequency resolutions - Frequency switching - High-frequency stability - Millimeter wave (MMW) - Millimeter-wave imaging - Operating frequency - Phaselocked loop (PLLs);
D O I：
10.2528/PIERC18122006
中图分类号：
学科分类号：
摘要：
A wide Ka-band frequency agility synthesizer with low phase noise and high frequency stability is presented in this paper, which serves as the emission source of transmitter and the local oscillator (LO) of receiver in fully electronic millimeter wave (MMW) imaging system. In order to improve operating frequency and shorten hopping time, a novel method is proposed in this synthesizer. By mixing direct digital synthesis (DDS) with multiple phase locked loops (PLLs) and multiplying the mixed signal, a high output frequency with low phase noise and rapid frequency hopping is realized. The experimental results show that the frequency synthesizer achieves frequency resolution of 1MHz from 27 to 32GHz and phase noise of -95 dBc/Hz at 10 kHz carrier offset. In addition, the frequency switching time is 2µs, and broadband spurs do not exceed -60 dBc. © 2019, Electromagnetics Academy. All Rights Reserved.
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收藏
页码：227 / 239
页数：12
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