A 60 GHz 360° 5-bit digitally controlled high-pass/direct-pass T-type phase shifter using nMOS body-floating switch

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• 作者：Dong Huang ; Lei Zhang ; Li Zhang ; Yan Wang
• 关键词：CMOS ; Phase shifter ; mm ; Wave ; Switch ; Body ; floating ; Insertion loss
• 刊名：Analog Integrated Circuits and Signal Processing
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：90
• 期：1
• 页码：93-100
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Circuits and Systems; Electrical Engineering; Signal,Image and Speech Processing;
• 出版者：Springer US
• ISSN：1573-1979
• 卷排序：90

文摘

A 57–66 GHz 5-bit digitally controlled high-pass/direct-pass T-type phase shifter (PS) is presented in this paper in a 65 nm LP CMOS technology. Influence of body connection manners on insertion loss (IL) of nMOS switches in high-pass/direct-pass T-type PS is carefully investigated. Using body-floating technique, both low IL and excellent IL flatness are achieved simultaneously. The minimum and maximum IL are 8.8 and 17 dB, respectively, with a maximum IL flatness of ±1 dB and a maximum root mean square (rms) gain error of 1.6 dB across 57–66 GHz. The proposed PS also achieves a maximum rms phase error of 3.9°, a minimum input 1 dB power compression point (IP_−1 dB) of 13 dBm, while shows well matching characteristics, with both S11 and S22 of less than −8.5 dB across 57–66 GHz for every phase shifting state.