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该论文提出了一种在90nm数字CMOS工艺中实现的52GHz相控阵接收机前端，通过在LO路径进行移相来减少高频信号在CMOS衬底上的长距离布线，从而解决损耗和匹配问题，并实现低面积和低功耗的波束赋形。
components at high frequencies impose the application of beamforming to enable wireless communication in the mm-wave band. At the receiver side, beamforming improves the SNR and increases immunity against interfering signals. However, broadband implementation of beamforming at mm-wave frequencies in CMOS requires extensive routing of high-frequency signals over the CMOS substrate, yielding loss and matching problems. In order to minimize these problems, in combination with low area and power consumption, phase shifting in the LO path is an appealing candidate [1]. In this paper, a CMOS implementation of this technique, based on a widely tunable QVCO is presented. Each path achieves 30dB of gain and a minimum NF of 7.1dB, yielding a system NF of 4.1dB. The overall current draw is 54mA
K. Scheir1,2, S. Bronckers1,2, J. Borremans1,2, P. Wambacq1,2, Y. Rolain2, 1
IMEC, Leuven, Belgium, 2Vrije Universiteit Brussel, Brussels, Belgium The high free-space loss and the limited performance of CMOS active and passive