A Ka-Band 8-Stream Phased-Array Receiver with Time-Hopping Blocker Rejection for 6G Applications

This work proposes an area-efficient Ka-band non-uniform time-hopping (TH) phased array receiver that supports up to eight streams using only eight RF elements. By reusing RF signal paths for different streams through fast stream switching, the design significantly reduces chip area. Additionally, the proposed non-uniform TH technique mitigates blocker issues caused by switching harmonics through dithering. A prototype fabricated in 65nm CMOS demonstrates <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$4 \times 4$</tex> MIMO signal reception in OTA measurements for both horizontal and vertical polarization, achieving a total data rate of 38.4 Gbps with a 42.9 dB improvement in blocker tolerance.

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Publication Details

Published
2025-06-08
DOI
https://doi.org/10.23919/vlsitechnologyandcir65189.2025.11074812
Primary Topic
Radio Frequency Integrated Circuit Design
Type
article
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article

A Ka-Band 8-Stream Phased-Array Receiver with Time-Hopping Blocker Rejection for 6G Applications

Chenxin Liu, Atsushi Shirane, Minzhe Tang, Yuncheng Zhang et al.
Radio Frequency Integrated Circuit Design
article

A Ka-Band 8-Stream Phased-Array Receiver with Time-Hopping Blocker Rejection for 6G Applications

Chenxin Liu, Atsushi Shirane, Minzhe Tang, Yuncheng Zhang, Kazuaki Kunihiro, Ziyuan Ren, Kenichi Okada, Dingxin Xu, Minghao Fan, Jian Pang, Dongfan Xu, Yi Zhang, Zheng Li, Yuxuan Liu, Yilun Chen, Hideyuki Sakai
article en

Abstract

This work proposes an area-efficient Ka-band non-uniform time-hopping (TH) phased array receiver that supports up to eight streams using only eight RF elements. By reusing RF signal paths for different streams through fast stream switching, the design significantly reduces chip area. Additionally, the proposed non-uniform TH technique mitigates blocker issues caused by switching harmonics through dithering. A prototype fabricated in 65nm CMOS demonstrates <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$4 \times 4$</tex> MIMO signal reception in OTA measurements for both horizontal and vertical polarization, achieving a total data rate of 38.4 Gbps with a 42.9 dB improvement in blocker tolerance.

Tokyo Institute of Technology (JP)
Affordable and clean energy
Openalex Percentile: Top 82%
Radio Frequency Integrated Circuit Design
DOISourceOpenAlex
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A Ka-Band 8-Stream Phased-Array Receiver with Time-Hopping Blocker Rejection for 6G Applications — Chenxin Liu, Atsushi Shirane, et al. · (2025) | TGRS Research Map | TGRS