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The Journal of The Korea Institute of Intelligent Transport Systems Vol.7 No.2 pp.62-69
역위상 기법을 이용한 전력 증폭기 선형성 개선
The Improvement of Linearity in Power Amplifier Using Anti Phase Intermodulation Distortion Linearization Technique
Abstract
This paper proposes linearization technique that the linearity is improved by controlling IMD between the drive stage and the output stage. From the experimental results of W-CDMA 4FA input signal, this amplifier has ACLR of -48dBc@5MHz offset at 50W average power. Proposed linearization technique provides predistortion effect for using drive amplifier without additional circuit, which is the significant in this paper that it makes up for the weak point of analog predistortion method and feedforward method.
