Design of 802.11a WLAN Receiver 5GHzU-NII Band Down-Converter RFICs

• Main Authors: Yuan-Kai Chu, 朱元凱
• Other Authors: Huey-Ru Chuang
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/03806287860452999376

碩士 === 國立成功大學 === 電機工程學系碩博士班 === 90 === This thesis presents the development of 5GHz U-NII band CMOS RFICs for the 802.11a WLAN receiver down-converter in TSMC standard 0.18um CMOS technology. The developed 5GHz RFICs include the LNA, mixer, L-C tank and quadrature VCOs, and prescaler for 5GHz synthesizer. The RF is from 5.725 to 5.825 GHz, the LO is 5.465 to 5.525GHz and the IF is at 280 MHz. The measurements are performed by using FR-4 PCB test fixture. The LNA has 6.4dB gain, 4.9dB noise figure and input P1dB -5.25dBm. The single-balanced mixer has 4.5dB conversion loss, 14.6dB noise figure and input P1dB 0dBm. The L-C tank VCO has output frequency from 5860 to 6026MHz with -85dBc/Hz@100KHz phase noise. The quadrature VCO has output frequency from 6341 to 6382MHz with -87dBc/Hz@100KHz phase noise. The dual-modulus prescaler (32/33) has highest operating frequency at 7225MHz and 6800MHz, respectively, when mode is 0 and 1. The circuit design simulation is performed by using ADS and H-Spice. Simulation and measured results basically agree well.