DocumentCode
843866
Title
UWB Gilbert downconverter utilising a wideband LR-CR quadrature generator
Author
Syu, J.-S. ; Meng, C. ; Teng, Y.-H.
Author_Institution
Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu
Volume
45
Issue
10
fYear
2009
Firstpage
514
Lastpage
515
Abstract
An ultra-wideband (UWB) I/Q downconverter with an LR-CR quadrature generator is demonstrated using 0.35 mum 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 2deg in the RF frequency range 3-11 GHz.
Keywords
Ge-Si alloys; electric generators; heterojunction bipolar transistors; mixers (circuits); semiconductor materials; ultra wideband communication; SiGe; SiGe HBT technology; amplitude imbalance; frequency 3 GHz to 11 GHz; phase error; size 0.35 micron; ultrawideband Gilbert downconverter; wideband LR-CR quadrature generator;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el.2009.0613
Filename
4913373
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