A 28-GHz CMOS Phased-Array Beamformer Supporting Dual-Polarized MIMO with Cross-Polarization Leakage Cancellation
A 28-GHz CMOS Phased-Array Beamformer Supporting Dual-Polarized MIMO with Cross-Polarization Leakage Cancellation
复制标题
支持具有交叉极化泄漏消除功能的双极化 MIMO 的 28GHz CMOS 相控阵波束形成器
DOI：
10.1109/vlsicircuits18222.2020.9162882
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
K. Okada
中科院分区：
文献类型：
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作者：
Jian Pang;Zheng Li;Xueting Luo;Joshua Alvin;Rattanan Saengchan;A. Fadila;K. Yanagisawa;Yi Zhang;Zixin Chen;Zhongliang Huang;Xiaofan Gu;Rui Wu;Yun Wang;Dongwon You;Bangan Liu;Zheng Sun;Yucheng Zhang;Hongye Huang;Naoki Oshima;K. Motoi;S. Hori;K. Kunihiro;T. Kaneko;A. Shirane;K. Okada
本文介绍了一种支持双极化MIMO（DP-MIMO）操作的CMOS 28 GHz相控阵波束形成器芯片。为了改善由天线和传播引起的交叉极化隔离度下降，实现了交叉极化泄漏抵消技术。从TX阵列到RX阵列的沿着可保持40 dB以上的交叉极化隔离。本工作还采用了紧凑的中和双向架构，以最大限度地降低芯片的制造成本。双向PA LNA在PA模式下的峰值PAE为33.1%，在LNA模式下的NF为5.4dB。通过改进交叉极化隔离度，在OTA测试中实现了2×2 DP-MIMO通信，采用256 QAM调制方式，传输两条5G NR OFDMA模式数据流。相应的TX至RX EVM为3.3%。每个天线路径的功耗在TX模式下为181 mW，在RX模式下为88 mW。
This paper introduces a CMOS 28-GHz phased-array beamformer chip supporting dual-polarized MIMO (DP-MIMO) operation. A cross-pol. leakage cancellation technique is implemented for improving the degraded cross-pol. isolation caused by the antennas and the propagation. More than 40-dB cross-pol. isolation is maintained along the TX array to the RX array. This work also adopts a compact neutralized bidirectional architecture to minimize the chip manufacturing cost. The bi-directional PA-LNA realizes a peak PAE of 33.1% in PA mode and an NF of 5.4dB in LNA mode. With the improved cross-pol. isolation, 2×2 DP-MIMO communication with two 5G NR OFDMA-mode streams in 256QAM is achieved in the OTA measurement. The corresponding TX-to-RX EVM is 3.3%. The power consumptions for each antenna path are 181mW in TX mode and 88mW in RX mode.