A 60GHz CMOS Receiver Using a 30GHz LO

📋 论文概要

该论文提出了一种采用30GHz本振(LO)的60GHz CMOS接收机，通过使用半输入频率的LO来简化LO和分频器设计，同时针对LO三次谐波引入的额外镜像问题提出了解决方案。

💡 主要创新点

• 采用30GHz半频LO设计60GHz接收机，有效降低LO和分频器的设计难度与功耗。
• 针对LO三次谐波引起的镜像问题，提出了一种抑制技术，提高了接收机的镜像抑制性能。

🏷 关键词

📄 原文摘要

Recent work on receivers for the 60GHz band has considered various frequency plans to ease the design of the building blocks, particularly the local oscillator (LO) and the frequency dividers [1-3]. A natural choice of the LO frequency in a heterodyne system is half of the input frequency as it places the image in the vicinity of zero while greatly simplifying the design and distribution of the LO and divider signals [4]. Unfortunately, a simple heterodyne chain consisting of a single RF mixer and quadrature IF mixers suffers from an additional image introduced by the third harmonic of the LO in the RF mixing operation, which flips the signal spectrum horizontally and superimposes it on the original downconverted spectrum. Since the third harmonic of the LO is only 9.5dB lower, this corruption proves serious in modulation schemes having asymmetric spectra, e.g., FM, QPSK, and QAM. This paper describes a heterodyne receiver architecture that incorporates a 30GHz LO without quadrature ph

👥 作者与机构

Ali Parsa, Behzad Razavi

University of California, Los Angeles, CA