2009•The Journal of The Korea Institute of Intelligent Transport SystemsRequires access
A Study on Improvement of Linearity and Efficiency Compensation in a Doherty Power Amplifier
장정석, 도지훈, 윤호석, 김대희, 김대웅, Ui‐Seok Hong
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Abstract
This paper proposes a method which increases the linearity using an improvement mechanism of Doherty power amplifier and compensates the decrement of efficiency due to improvement of linearity. To verify the method, a 20W power amplifier is designed and implemented. Compared with 2-way Doherty power amplifier, the implemented 3-way Doherty power amplifier with class F shows improved linearity about 10dBc and efficiency about 1.5%. Also, efficiency characteristic has been improved about 3.5% compared with the 2-way Doherty power amplifier while maintaining linearity. This results show that the proposed 3-way Doherty power amplifier with class F is shown to be adequate for improvement of efficiency and linearity. It is expected that the proposed amplifier can be used for various wireless communication system amplifiers.