A CMOS Vector-Sum Phase Shifter for 5G mm-Wave Application

Eunjung Kim, Younghwan Kim, Sanggeun Jeon

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


This paper presents a wideband CMOS vector-sum phase shifter (VSPS) targeting the n260 band of 5G communication. A differential quadrature generator is implemented using a Marchand balun and two 90° coupled-line couplers to improve robustness to process and temperature variations. The quadrature vector signals are combined by a following vector modulator that adopts a double Gilbert-cell topology. The linearity and input-matching performance are enhanced at the expense of extra DC consumption by stacking a current source with high bias. The measurement shows that the VSPS provides a continuous 360° phase shift with an average insertion loss of 16.3 dB at 37 GHz. The root-mean-square (RMS) amplitude and phase errors maintain less than 1.5 dB and 4.9°, respectively, from 30.9 GHz to 41.7 GHz. The input-referred 1-dB compression point is 5.7 dBm at 38 GHz.

Original languageEnglish
Pages (from-to)8-11
Number of pages4
JournalJournal of Electromagnetic Engineering and Science
Issue number1
Publication statusPublished - 2022

Bibliographical note

Publisher Copyright:
© Copyright The Korean Institute of Electromagnetic Engineering and Science


  • 5g
  • Cmos
  • Millimeter-wave (mm-wave)
  • Phased array
  • Vector-sum phase shifter (vsps)

ASJC Scopus subject areas

  • Radiation
  • Instrumentation
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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