Dual-Band Weaver-Hartley Image Rejection Receiver and Ultra-Wideband Down-Converter with LR-CR Quadrature LO Generator

• Main Authors: Ya-Hui Teng, 鄧雅惠
• Other Authors: Chin-Chun Meng
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/75559024384378874493

碩士 === 國立交通大學 === 電信工程系所 === 96 === This thesis is divided into two parts. One part realizes a single-chip dual-band Weaver-Hartley receiver with high image rejection ratio for the Wireless LAN RF front-end. In order to lower the cost of the receiver, we choose a TSMC 0.18um CMOS technology to achieve a Weaver-Hartley image rejection receiver with a more than 50dB image rejection ratio for each band. The other part demonstrates a novel quadrature generator. Because the TSMC 0.35um SiGe HBT transistor has a higher cut-off frequency than the TSMC 0.18um CMOS transistor, the UWB I/Q down-converter is fulfilled in a TSMC 0.35um SiGe BiCMOS technology. With the wide bandwidth of the Marchand balun, the UWB I/Q down-converter whose IF I/Q outputs achieve an amplitude imbalance of < 1dB and a phase error of < 2° is realized for UWB applications.