UWB Gilbert downconverter utilising a wideband LR-CR quadrature generator

J. S. Syu*, Chin-Chun Meng, Y. H. Teng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


An ultra-wideband (UWB) I/Q downconverter with an LR-CR quadrature generator is demonstrated using 0.35 μm SiGe HBT technology. The I/Q outputs of this generator are always in quadrature phase at any frequency while the BJT-type active mixer inherently tolerates much LO power difference for a flat gain response. Consequently, the amplitude imbalance and phase error of the I/Q outputs are less than 1 dB and 2° in the RF frequency range 3-11 GHz.

Original languageEnglish
Pages (from-to)514-515
Number of pages2
JournalElectronics Letters
Issue number10
StatePublished - 12 Jun 2009

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