IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
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A 39 GHz broadband high-isolation CMOS mixer using magnetic-coupling CG Gm stage for 5G applications
Zhiqing LiuJiayu DongZhilin ChenHuihua LiuChenxi ZhaoYunqiu WuKai Kang
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2018 Volume 15 Issue 18 Pages 20180726

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Abstract

This paper presents a 39 GHz broadband high-isolation mixer for 5G applications in 65 nm CMOS process. By adopting a common-gate (CG) gm stage with magnetic coupling, the mixer obtains a wide RF bandwidth without extra input matching components, which is benefit for system-level design. Meanwhile, it can improve gain and noise performance. Besides, a fully symmetrical design method is employed to keep a minimum LO leakage. According to experimental results, the mixer operates from 27.6 to 57.8 GHz and achieves a gain of 7.3 dB under LO power of 0 dBm. The LO-RF and LO-IF isolations are 59.5 and 57 dB, respectively.

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© 2018 by The Institute of Electronics, Information and Communication Engineers
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