Broadband CMOS Gilbert Down-Converter utilizing a low-loss step-impedance rat-race coupler

Hung Ju Wei*, Chin-Chun Meng, Sheng Wen Yu

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

A Broadband Gilbert Down-Converter with step-impedance rat-race coupler is demonstrated using 0.13 μm standard CMOS technology. The proposed method utilizes higher effective dielectric-constant, phase-inverter and step-impedance techniques simultaneously to make the rat-race coupler more compact (- 64% reduction) and phase-balanced over a wide operating bandwidth. The down-converter has NF of 16 dB and LO-to-RF isolation of better than 35 dB. The mixer core consumes 2.9 mA at Vdd=1.8 V.

Original languageEnglish
Title of host publicationIMS 2009 - 2009 IEEE MTT-S International Microwave Symposium Digest
Pages1101-1104
Number of pages4
DOIs
StatePublished - 1 Dec 2009
Event2009 IEEE MTT-S International Microwave Symposium, IMS 2009 - Boston, MA, United States
Duration: 7 Jun 200912 Jun 2009

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
ISSN (Print)0149-645X

Conference

Conference2009 IEEE MTT-S International Microwave Symposium, IMS 2009
CountryUnited States
CityBoston, MA
Period7/06/0912/06/09

Keywords

  • Gilbert mixer
  • Phase inverter
  • Rat-race coupler
  • Step impedance

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