5.7GHz CMOS RF Receiver And PA RFICs For IEEE802.11a WLAN Applications
| Autor: | Che-Hong Liao, 廖哲宏 |
|---|---|
| Rok vydání: | 2003 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 91 This thesis presents the development of 5.7 GHz CMOS RFICs for the IEEE802.11a WLAN RF receiver and a 5.7 GHz two stage class-A CMOS PA in TSMC standard 0.18mm CMOS process. The CMOS RF receiver includes a differential LNA with gain control, an active double-balanced mixer, and an L-C tank CMOS VCO. The RF is from 5.725 to 5.825 GHz, the LO is from 5.265 to 5.325GHz and the IF is at 480MHz. The LNA exhibits a gain of 11dB, noise figure of 4.2dB and input P1dB of -11dBm. The mixer exhibits a conversion gain of 11.06dB, noise figure of 12.8dB and input P1dB of —16.4dBm. The L-C tank CMOS VCO has an output frequency from 5099 to 5242MHz with -90.8dBc/Hz@100KHz phase noise. The VCO is used in a designed 5-GHz frequency synthesizer. The synthesizer with a spur below 58dBc has a settling time of 71.3ms for 20MHz step. The 5.7-GHz CMOS RF receiver (with the frequency synthesizer) exhibits a conversion gain of 19.1dB, noise figure of 6.6dB, input P1dB of —30.8dBm. For the digital modulation measurement, a 5.744MHz 802.11a 18Mbps and 54Mbps OFDM signal are applied to the receiver. The measured EVM is about 2.57%(QPSK) and 1.96%(64QAM). The measured frequency response of the two-stage class-A CMOS PA shifts from 5.75GHz to 5.98GHz. The PA exhibits a gain of 10.4dB and output P1dB of 12.5dBm. Also a 5.7GHz 0.25-mm CMOS LNA and mixer and a 5GHz 0.18-mm CMOS VCO with switched capacitance are prsented in appendix. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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