Radio Frequency Circuits for Tunable Multi-Band CMOS Receivers for Wireless LAN Applications
FLORIDA UNIV GAINESVILLE DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
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Currently, three mainstream wireless LAN WLAN standards, IEEE 802.11a, b and g, co-exist in the market. The network should be able to work with all these standards. This has increased the demand of multi-band wireless LAN transceivers. Being a commercial application, the transceiver must be low cost, which points to a CMOS single chip solution. This dissertation addresses the design issues of multi-band CMOS WLAN receivers. A multi-band and multi-function receiver architecture is proposed for wireless LAN applications. The key blocks include RF switches, a multi-band RF down-converter, a multi-band voltage controlled oscillator VCO and a wide-tuning range VCO. This thesis work demonstrates the feasibility of realizing these circuits in CMOS technology. Two RF CMOS switches working at 2.4 GHz and 5.8 GHz were designed and tested. The 2.4-GHz switch exhibits sufficient performance for 802.11bg applications.
- Computer Systems