A 28-GHz CMOS Phased-Array Beamformer Supporting Dual-Polarized MIMO with Cross-Polarization Leakage Cancellation

2020 IEEE Symposium on VLSI Circuits Pub Date : 2020-06-01 DOI:10.1109/VLSICircuits18222.2020.9162882

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

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引用次数: 9

Abstract

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.

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一种支持双极化MIMO的28 ghz CMOS相控阵波束形成器

介绍了一种支持双极化MIMO (DP-MIMO)工作的CMOS 28 ghz相控阵波束形成芯片。cross-pol。为了改善交叉pol的退化，采用了泄漏抵消技术。由天线和传播引起的隔离。超过40分贝的交叉pol。从TX阵列到RX阵列保持隔离。本工作还采用紧凑的中和双向架构，以最大限度地降低芯片制造成本。双向PA-LNA在PA模式下峰值PAE为33.1%，在LNA模式下峰值NF为5.4dB。使用改进的交叉pol。隔离，2×2在OTA测量中实现了256QAM中两个5G NR ofdma模式流的DP-MIMO通信。对应的TX-to-RX EVM为3.3%。每条天线路径的功耗在TX模式下为181mW，在RX模式下为88mW。

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2020 IEEE Symposium on VLSI Circuits

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