2.4GHz Low noise Amplifier Design

• Main Authors: Huang-Wei Chen, 陳皇瑋
• Other Authors: n
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/73220370919615358757

碩士 === 崑山科技大學 === 電子工程研究所 === 92 === In this thesis, 2.4 GHz LNAs (low noise amplifiers) have been proposed and investigated. Three LNAs with different topologies including a cascode LNA, a two-stage cascade LNA, and a current reused LNA have been designed. The process used is a commercially available 0.25 mm CMOS process from TSMC, and furthermore using simulation tool, Agilent EEsof ADS (Advance Design System) 2003a and Ansoft Designer, to simulate and analyze proposed circuits. According to simulation results of three LNAs each with about 10 mW power consumption at the center frequency of 2.4 GHz, noise figures of them are 2.6dB, 2.75 dB, and 2.9 dB, respectively, and moreover, small signal gains of them are 13.3 dB, 19 dB, and 20 dB, respectively. Additionally, measured results of noise figure and small signal gain of the proposed cascode LNA are 2.97 dB and 9.6 dB, respectively. Finally, reasons about deviations between measured results and simulation results have been discussed.