Design of 5.2GHz CMOS Mixer and Quadrature VCO RFICs and Dual-band Frequency Synthesizer for WLAN Applications

• Main Authors: Chang-Lin Wei, 魏昌琳
• Other Authors: Sheng-Fuh Chang
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/12572795635068159992

碩士 === 國立中正大學 === 電機工程研究所 === 91 === This thesis presents the design, implementation, and measurement of three circuits, which are a 5 GHz CMOS doubly-balanced mixer, a CMOS quadrature VCO, and a 2.8/5.7 GHz dual-band frequency synthesizer. The mixer and quadrature VCO were fabricated with the 0.25mm and 0.18mm CMOS technology, respectively, which were mounted on the printed circuit board for performance measurement. The doubly-balanced mixer has the measured conversion gain of 3 dB, the noise figure of 14.5 dB and the input P1dB of —10 dBm. On the quadrature VCO performance, the measured phase noise is —112 dBc/Hz at 1MHz offset from 5.5 GHz, and the output waveform phase error is less than . The thesis also describes the design of the 2.8/5.7 GHz hybrid frequency synthesizer for the 2.4/5.2 GHz dual-band WLAN RF front-end, which shows the measured phase noise is better than —96 dBc/Hz@100kHz.