IMPROVEMENT OF LINEAR OPERATION RANGE OF POWER AMPLIFIER USING DIVIDER/COMBINER TECHNIQUE

• Main Authors: Cheng-En Tsai, 蔡承恩
• Other Authors: The-Nan Chang
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/48947920810997330468

碩士 === 大同大學 === 通訊工程研究所 === 98 === This paper research aims at using Wilkinson power divider and Wilkinson power coupler to combine two same and low cost power amplifiers to make a high linear power booster module. This design can achieve 3dB more output power and to obtain the good linearity. Generally specking, to design the high power amplifier using single monolithic microwave integrated circuit (MMIC) is highly difficult, especially to obtain the best impedance matching and linearity on chip. Therefore, this study combined two power amplifiers by using Wilkinson power divider and Wilkinson power coupler to increase 3dB output power and better linearity. In this research, firstly to introduce the Wilkinson power devider/combiner simulation, design and practical measurement as gauging. And then focusing on comparing the linear output power with single power amplifier and Wilkinson power divider/coupler booster module by measuring CW signal for P1dB and measuring 802.11g modulation for EVM performance.