A 3.5-4.5-GHz ultra-compact 0.25mm2 reflection-type 360° phase shifter

Wei Tsung Li, Jeng-Han Tsai, Min Huang, Tian Wei Huang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)


An ultra-compact reflection-type phase shifter (RTPS) with full 360° continuous phase shift and low insertion loss using standard 0.18-μm CMOS technology is demonstrated in this paper. Dual active reflection load using active inductor is utilized in the proposed reflection-type load to cover 360 ° phase tuning through only one quadrature hybrid, which has the advantages of compact chip size, low insertion loss, and low loss variation. Measurements show better than 15 dB input/output return loss, signal losses of 6.4dB±1.5dB, less than 2.4dB±0.6 dB loss variation, and a 360 ° continuously tunable range across 3.5∼4.5 GHz with 3.4mW dc power consumption. To the best of our knowledge, the proposed phase shifter has the smallest die size, 0.25 mm2, among all reported 360° C-band CMOS RTPS, which is important for a large phase array system.

Original languageEnglish
Title of host publication2011 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2011 - Digest of Papers
Publication statusPublished - 2011 Aug 1
Event2011 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2011 - Baltimore, MD, United States
Duration: 2011 Jun 52011 Jun 7

Publication series

NameDigest of Papers - IEEE Radio Frequency Integrated Circuits Symposium
ISSN (Print)1529-2517


Other2011 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2011
Country/TerritoryUnited States
CityBaltimore, MD


  • Active reflection load
  • CMOS
  • reflection-type phase shifter

ASJC Scopus subject areas

  • Engineering(all)


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