A 1.5-to-5.0GHz Input-Matched +2dBm P1dB AllPassive Switched-Capacitor Beamforming Receiver Front-End in 65nm CMOS

📋 论文概要

该论文提出了一种工作于1.5-5.0GHz的全无源开关电容波束形成接收机前端，实现了输入匹配和+2dBm的P1dB。通过LO域移相和开关电容求和，解决了相控阵接收机中波束形成前线性度瓶颈的问题，提升了干扰抑制能力。

💡 主要创新点

• 采用全无源开关电容结构实现波束形成，避免了有源电路的非线性，显著提高了接收机前端的线性度。
• 在LO域进行相位调整，简化了信号路径，降低了功耗和电路复杂度。
• 实现了宽频带输入匹配（1.5-5.0GHz）同时保持较高的P1dB（+2dBm），适用于多频段相控阵系统。

🏷 关键词

📄 原文摘要

TNO Science and Industry, The Hague, The Netherlands 1 2 Phased arrays in CMOS for consumer communication bands aim to enhance receiver performance by exploiting beamforming with antenna arrays. Sensitivity increases with the number of antenna elements through array gain and interferers can be cancelled through the spatial filtering of the beam pattern [1]. For the latter, the linearity of the receiver before the beamforming summing point becomes a bottleneck as interferers are not cancelled yet. Phase shifting in the LO domain reduces the complexity in the signal path and enables the use of linear signal blocks, but has high requirements on the multiphase LO generation

👥 作者与机构

Michiel Soer1, Eric Klumperink1, Bram Nauta1, Frank van Vliet1,2

University of Twente, Enschede, The Netherlands