An 8.5-dB Insertion Loss and 0.8° RMS Phase Error Ka-Band CMOS Hybrid Phase Shifter Featuring Nonuniform Matching for Satellite Communication

Xi FU; Yun WANG; Xiaolin WANG; Xiaofan GU; Xueting LUO; Zheng LI; Jian PANG; Atsushi SHIRANE; Kenichi OKADA

doi:10.1587/transele.2021CTP0002

Special Section on Analog Circuits and Their Application Technologies

An 8.5-dB Insertion Loss and 0.8° RMS Phase Error Ka-Band CMOS Hybrid Phase Shifter Featuring Nonuniform Matching for Satellite Communication

Xi FU, Yun WANG, Xiaolin WANG, Xiaofan GU, Xueting LUO, Zheng LI, Jian PANG, Atsushi SHIRANE, Kenichi OKADA

Author information

Xi FU
Department of Electrical and Electronic Engineering, Tokyo Institute of Technology
Yun WANG
Department of Electrical and Electronic Engineering, Tokyo Institute of Technology
Xiaolin WANG
Department of Electrical and Electronic Engineering, Tokyo Institute of Technology
Xiaofan GU
Department of Electrical and Electronic Engineering, Tokyo Institute of Technology
Xueting LUO
Department of Electrical and Electronic Engineering, Tokyo Institute of Technology
Zheng LI
Department of Electrical and Electronic Engineering, Tokyo Institute of Technology
Jian PANG
Department of Electrical and Electronic Engineering, Tokyo Institute of Technology
Atsushi SHIRANE
Department of Electrical and Electronic Engineering, Tokyo Institute of Technology
Kenichi OKADA
Department of Electrical and Electronic Engineering, Tokyo Institute of Technology

Keywords: phase shifter, switch-type phase shifter, reflective-type phase shifter, Ka-band, 29GHz, phased-array, millimeter-wave, CMOS

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2022 Volume E105.C Issue 10 Pages 552-560

DOI https://doi.org/10.1587/transele.2021CTP0002

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Abstract

This paper presents a high-resolution and low-insertion-loss CMOS hybrid phase shifter with a nonuniform matching technique for satellite communication (SATCOM). The proposed hybrid phase shifter includes three 45° coarse phase-shifting stages and one 45° fine phase-tuning stage. The coarse stages are realized by bridged-T switch-type phase shifters (STPS) with 45° phase steps. The fine-tuning stage is based on a reflective-type phase shifter (RTPS) with two identical LC load tanks for phase tuning. A 0.8° phase resolution is realized by this work to support fine beam steering for the SATCOM. To further reduce the chain insertion loss, a nonuniform matching technique is utilized at the coarse stages. For the coarse and fine stages, the measured RMS gain errors at 29GHz are 0.7dB and 0.3dB, respectively. The measured RMS phase errors are 0.8° and 0.4°, respectively. The proposed hybrid phase shifter maintains return losses of all phase states less than -12dB from 24GHz to 34GHz. The presented hybrid phase shifter is fabricated in a standard 65-nm CMOS technology with a 0.14mm² active area.

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