2005•The Journal of the Korean Institute of Information and Communication EngineeringRequires access
A Study on Improving Efficiency of Power Amplifier using Doherty Theory for Wireless Network and Repeater
Jeon Joong Sung, Choi Dong Muk
Open publisher page 0 citations
Abstract
In this paper, Doherty amplifier is designed by the need of improving the linearity and efficiency of wireless network and repeater for WCDMA. It is designed to maintain the high linearity and efficiency at the low efficiency period of the power amplifier after analyzing Doherty technique using the active load-pull in condition of the high efficiency power amplifier implementation according to the variation of input power. CW 1-tone experimental results at the WCDMA frequency 2.112.17 CHz shows that Doherty amplifier, which achieves pore. add efficiency(PAE) 50 at 6dB back off the point from maximum output power 52.3dBm, obtains higher efficiency of 13.3 than class AB. finding optimum bias point after adjusted gate voltage, Doherty amplifier shows that IMD3 improves 4dB.