High LO-to-RF isolation wideband Gilbert upconversion micromixer using a phase-inverter rat-race coupler in 0.35μm SiGe HBT technology

Jin Siang Syu*, Chin-Chun Meng, Po Yi Wu

*Corresponding author for this work

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

2 Scopus citations

Abstract

A wideband Gilbert upconversion micromixer with a phase-inverter rat-race coupler is demonstrated in this paper using 0.35-m SiGe heterojunction bipolar transistor (HBT) technology. By utilizing a crossover phase inverter with the coplanar stripline (CPS) realization, the size of a rat-race coupler is highly reduced. This rat-race coupler employed at the RF port combines differential mixer outputs to single-ended while the common-mode LO leakage is absorbed by the isolated port of the coupler. Consequently, the demonstrated upconverter has the conversion gain of 8 dB while the OP 1dB and OIP 3 are around 7 dBm and 5 dBm, respectively, within the RF 3-dB bandwidth from 11 to 19 GHz. Additionally, the LO-to-RF isolation is over 50 dB within the RF bandwidth.

Original languageEnglish
Title of host publicationRWW 2012 - Proceedings
Subtitle of host publicationIEEE Radio and Wireless Symposium, RWS 2012
Pages447-450
Number of pages4
DOIs
StatePublished - 11 May 2012
Event2012 6th IEEE Radio and Wireless Week, RWW 2012 - 2012 IEEE Radio and Wireless Symposium, RWS 2012 - Santa Clara, CA, United States
Duration: 15 Jan 201218 Jan 2012

Publication series

NameRWW 2012 - Proceedings: IEEE Radio and Wireless Symposium, RWS 2012

Conference

Conference2012 6th IEEE Radio and Wireless Week, RWW 2012 - 2012 IEEE Radio and Wireless Symposium, RWS 2012
CountryUnited States
CitySanta Clara, CA
Period15/01/1218/01/12

Keywords

  • Coplanar stripline (CPS)
  • Heterojunction bipolar transistor (HBT)
  • Micromixer
  • Phase-inverter
  • Rat-race coupler
  • SiGe

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