2.4/5.7-GHz dual-band dual-conversion architecture with correlated LO signal generators

Jin Siang Syu*, Chin-Chun Meng, Sheng Wen Yu, Tzung Han Wu, Guo Wei Huang

*Corresponding author for this work

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

Abstract

A 2.4/5.7-GHz dual-band dual-conversion downconverter is demonstrated using 0.35-μm SiGe heterojunction bipolar transistor (HBT) technology. This downconverter employs a complex dual-conversion system and a complex filter to reject the first and second image signals, respectively. The LO1 frequency is 2.5 times the LO2 frequency and is generated by a divide-by-two divider, a frequency doubler and a single-sideband up-converter. As a result, the correlated LO signals maintain excellent image-rejection performance of the dual-conversion system while only one LO input is needed. The downconverter achieves a 40/39-dB image-rejection ratio of the first image and a 44/46-dB image-rejection ratio of the second image for 2.4/5.7-GHz modes, respectively.

Original languageEnglish
Title of host publicationIMS 2009 - 2009 IEEE MTT-S International Microwave Symposium Digest
Pages1517-1520
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

  • Dual-band
  • Image rejection
  • Low-IF
  • SiGe heterojunction bipolar transistor (HBT)
  • Wireless LAN

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