X-band Weaver-Hartley low-IF downconverter with a resonant LC load

Jin Siang Syu*, Chin-Chun Meng, Ya Hui Teng, Guo Wei Huang

*Corresponding author for this work

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

1 Scopus citations

Abstract

An X-band Weaver-Hartley dual-conversion low-IF downconverter is demonstrated in this paper using 0.35-μm SiGe heterojunction bipolar transistor (HBT) technology. The first image signal is shifted away from the IF band due to the complex Weaver architecture while the second image signal is eliminated by a polyphase filter in the following Hartley architecture. In this work, a resonant LC load is employed at the first-stage mixer to improve both gain and linearity. As a result, the demonstrated downconverter achieves a conversion gain of 8 dB, single-sideband noise figure of 18 dB, IP1dB of -9 dBm, and IIP3 of 0 dBm, respectively, while consuming 75 mW at a 3.3-V supply. Moreover, the first and second image-rejection ratios are better than 43 and 40 dB when IF frequency ranges from 15 to 100 MHz.

Original languageEnglish
Title of host publicationAPMC 2009 - Asia Pacific Microwave Conference 2009
Pages1168-1171
Number of pages4
DOIs
StatePublished - 1 Dec 2009
EventAsia Pacific Microwave Conference 2009, APMC 2009 - Singapore, Singapore
Duration: 7 Dec 200910 Dec 2009

Publication series

NameAPMC 2009 - Asia Pacific Microwave Conference 2009

Conference

ConferenceAsia Pacific Microwave Conference 2009, APMC 2009
CountrySingapore
CitySingapore
Period7/12/0910/12/09

Keywords

  • Dual conversion
  • Hartley architecture
  • Image rejection
  • Weaver architecture

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