A 5.2-GHz GaInP/GaAs HBT double-quadrature downconverter with polyphase filters for 40-dB image rejection

Chin-Chun Meng*, D. W. Sung, G. W. Huang

*Corresponding author for this work

研究成果: Article同行評審

17 引文 斯高帕斯(Scopus)

摘要

A 5.2-GHz 11-dB gain, IP1 dB = -17 dBm and IIP3 = -10 dBm double-quadrature Gilbert downconversion mixer with polyphase filters is demonstrated by using GaInP/GaAs heterojunction bipolar transistor (HBT) technology. The image rejection ratio is better than 40 dB when LO = 5.17 GHz and intermediate frequency (IF) is in the range of 15 MHz to 40 MHz. The Gilbert downconverter has four-stage RC-CR IF polyphase filters for image rejection. Polyphase filters are also used to generate local (LO) and radio frequency (RF) quadrature signals around 5 GHz in the double-quadrature downconverter because GaAs has accurate thin film resistors and the low parasitic semi-insulating substrate.

原文English
頁(從 - 到)59-61
頁數3
期刊IEEE Microwave and Wireless Components Letters
15
發行號2
DOIs
出版狀態Published - 1 二月 2005

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