Title :
WLAN system trends and the implications for WLAN RFICs
Author :
McFarland, William J.
Author_Institution :
Atheros Commun. Inc., Sunnyvale, CA, USA
Abstract :
Six trends in WLAN systems are described. For each trend, the implications for WLAN RFICs are described. The six trends include increasing levels of integration, dual band operation, large percentage tuning ranges, very high data rates, long range capability, and PA efficiency enhancements. Potential solutions to these issues are examined. A new extended range mode, transmitter power control system, and amplifier efficiency enhancement approach are presented. Regulatory and performance requirements are described. Radio architecture, RF circuit design techniques, and system solutions are all described. Several examples are drawn from a single-chip, dual-band, CMOS transceiver for IEEE 802.11a/b/g wireless LAN designed at the author´s company.
Keywords :
UHF integrated circuits; UHF power amplifiers; circuit tuning; integrated circuit design; microwave integrated circuits; microwave power amplifiers; transceivers; wireless LAN; CMOS transceiver; IEEE 802.11a; IEEE 802.11b; IEEE 802.11g; PA efficiency enhancements; RF circuit design; RFIC; WLAN system trends; amplifier efficiency enhancement; dual band operation; dual-band transceiver; high data rates; integration levels; large tuning ranges; long range capability; power amplifiers; radio architecture; single-chip transceiver; transmitter power control system; wireless LAN; Circuit optimization; Circuit synthesis; Dual band; Power amplifiers; Power control; Radio frequency; Radio transmitters; Radiofrequency amplifiers; Radiofrequency integrated circuits; Wireless LAN;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2004. Digest of Papers. 2004 IEEE
Print_ISBN :
0-7803-8333-8
DOI :
10.1109/RFIC.2004.1320552
