Title: 2.4/5.7 GHz dual-band high linearity gilbert upconverter utilizing bias-offset TCA and LC current combiner
Authors: Syu, Jin-Siang
Meng, Chinchun
電信工程研究所
Institute of Communications Engineering
Keywords: dual-band;Gilbert mixer;LC current combiner;shunt-shunt feedback;SiGe heterojunction bipolar transistor (HBT);transconductance amplifier (TCA);WLAN
Issue Date: 1-Dec-2007
Abstract: A 2.4/5.7 GHz dual-band Gilbert upconversion mixer is demonstrated using 0.35 mu m SiGe BiCMOS technology. A bias-offset cross-coupled transconductance amplifier (TCA) is employed in the intermediate frequency port for the linearity improvement. The dual-band LC current combiner and the output shunt-shunt feedback buffer amplifier are in the radio frequency (RF) port. The mechanisms of the high linearity upconverter and, the design flow of the dual-band LC current combiner are established in this letter. The dual-band upconverter has conversion gain of 1.5/-0.2 dB, OP1dB of -10.5/-9 dBm, and OIP3 of 12/13 dBm for IF=100 MHz, RF= 2.4/5.7 GHz, respectively.
URI: http://dx.doi.org/10.1109/LMWC.2007.910504
http://hdl.handle.net/11536/10073
ISSN: 1531-1309
DOI: 10.1109/LMWC.2007.910504
Journal: IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
Volume: 17
Issue: 12
Begin Page: 876
End Page: 878
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