Publication Conference: Proceedings of the 6th European Microwave Integrated Circuits Conference

Title: Up-converted dual-envelope injection enhanced digital predistortion for inverse class-E power amplifier linearization

Authors: You-Jiang Liu, Rong Zeng, Tao Cao, Bang-Hua Zhou, Jie Zhou, Yi-Nong Liu

Author Affiliations: 1. Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang 621900, China; 2.Department of Engineering Physics, Tsinghua University, Beijing 100084, China.

Status: Published in 10-11 October 2011, Manchester, UK

Pages: 280-283

Abstract: A novel injection linearization technique called as upconverted dual-envelope injection (UCDEJ) is proposed in this paper, which combined with digital predistortion (DPD) can get better linearization performance. Starting with an investigation of traditional envelope injection (EJ) method, the UCDEJ technique with enhanced performances is deduced. The injected signal is composed of up-converted two tones of (ω2-ω1) and 2(ω2-ω1). Experimental results prove that its performances are far better than traditional envelope injection. The superiority of the linearization performance is verified by combining with DPD for a high efficiency GaN inverse class-E amplifier with strong nonlinearity. Thus performance of DPD is enhanced by UCDEJ.

Email: liuyj04@163.com