A fully integrated 5.2 GHz SiGe HBT upconversion micromixer using lumped B alun and LC current combiner

Tzung Han Wu, Chin-Chun Meng, Tse Hung Wu, Guo Wei Huang

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

5 Scopus citations

Abstract

A small and compact 5.2 GHz upconversion Gilbert micromixer using 0.35 μm SiGe HBT technology is demonstrated in this paper. The upconversion micromixer has a broadband matched single-ended IF input port. A lumped-element rat-race hybrid is inserted in the LO input stage to maintain LO phase accuracy. A passive LC current combiner is used to convert the micromixer differential output into a single-ended output and double the output current. Thus, the IF port, LO port and RF port of the upconverter are single-ended, and the stand-along upconverter is suitable for hybrid RF system applications. The fully matched high linearity micromixer has the conversion gain of-1 dB, OP 1dBof-10 dBm, OIP3 of 6 dBm when input IF=300 MHz, LO=4.9 GHz and output RF=5.2 GHz. The IF input return loss is better than 10 dB for frequencies up to 20 GHz while the RF output return loss is better than 13.5 dB for frequencies up to 20 GHz. The supply voltage is 3.3 V, the current consumption is 11.5 mA, and the die size is 0.98×0.83 mm2 with 6 integrated on-chip inductors.

Original languageEnglish
Title of host publication2005 IEEE MTT-S International Microwave Symposium Digest
Pages173-176
Number of pages4
DOIs
StatePublished - Jul 2005
Event2005 IEEE MTT-S International Microwave Symposium - Long Beach, CA, United States
Duration: 12 Jun 200517 Jun 2005

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
Volume2005
ISSN (Print)0149-645X

Conference

Conference2005 IEEE MTT-S International Microwave Symposium
Country/TerritoryUnited States
CityLong Beach, CA
Period12/06/0517/06/05

Keywords

  • Gilbert mixers
  • LC current combiners
  • Lumped elements
  • Rat-race hybrids
  • Upconverters

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