An Interference-Rejecting Low Noise Amplifier for WLAN Application

• Main Author: 江品全
• Other Authors: 郭建男
• Format: Others
• Language: en_US
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/08330704057991918694

碩士 === 國立交通大學 === 電子研究所 === 100 === In the modern RF (Radio frequency) receiver structures we often place a surface acoustic wave (SAW) filter before the low-noise amplifier (LNA). In many applications, including the wireless local area network (WLAN), a receiver must satisfies the blocking template which denotes the frequencies and corresponding power of the interferences. This thesis reveals a novel structure of an interference-rejecting low noise amplifier. We also developed a novel design methodology of notch filters. By using the bilinear transformation, designers can apply this theorem to obtain the desired bandwidth for any interested frequency range. For those receivers based on this structure, the ultimate goal, i.e. the SAW-Less front-end can be expected. This work is fabricated by using TSMC 0.18-μm CMOS process. From the measurement results, this work consumes 21.58mW DC power under a 1.8-V supply voltage. The voltage gain, noise figure (NF), 1-dB compression point (P1dB) and input-referred third-order intermodulation point (IIP3) is 24.79dB, 5.47dB, -21dBm and -13.5dBm, respectively.