Title: UWB Gilbert downconverter utilising a wideband LR-CR quadrature generator
Authors: Syu, J. -S.
Meng, C.
Teng, Y. -H.
Institute of Communications Engineering
Issue Date: 7-May-2009
Abstract: An ultra-wideband (UWB) I/Q downconverter with an LR-CR quadrature generator is demonstrated using 0.35 mu m 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. at gain response. Consequently, the amplitude imbalance and phase error of the I/Q outputs are less than 1 dB and 2 degrees in the RF frequency range 3-11 GHz.
URI: http://dx.doi.org/10.1049/el.2009.0613
ISSN: 0013-5194
DOI: 10.1049/el.2009.0613
Volume: 45
Issue: 10
Begin Page: 514
End Page: U46
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