Design of Dual-Band LNAs for Wireless Area Networks

• Main Authors: Chia-Hsin Lin, 林嘉星
• Other Authors: Yon-Ping Chen
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/93897424156310367539

碩士 === 國立交通大學 === 電機學院碩士在職專班電機與控制組 === 96 === This thesis studies design of dual-band low-noise amplifiers (LNA) for use in the IEEE802.11a and 802.11b wireless local area networks (WLANs). This cascaded two-stage dual-band LNA is designed at 2.441 GHz and 5.772 GHz, with high gains and optimized noise figures. The circuit design uses compensated matching networks, microstrip transmission lines, and resonance matching networks. The lumped inductors and capacitors use those manufactured by the TDK company. The resonance matching network is implemented using microstrip lines. This dual-band LNA uses DC 3.3 V and consumes 42 mA. The circuit achieves 27.7 dB power gain and 1.4 dB NF at 2.441 GHz, and 15 dB power gain and 2.3 dB NF at 5.772 GHz.