EDGE Power Amplifier ACPR Improvement with Inter-Stage Pre- and Postdistortion Linearization

Conference: GeMIC 2008 - German Microwave Conference
03/10/2008 - 03/12/2008 at Hamburg-Harburg, Germany

Proceedings: GeMIC 2008

Pages: 4Language: englishTyp: PDF

Personal VDE Members are entitled to a 10% discount on this title

Authors:
Ibrahim, Irfan; Heuermann, Holger (Department of High Frequency Technologies, University of Applied Science Aachen)

Abstract:
This paper presents the design, optimization, and measured performance of linearized EDGE power amplifier. The linearization is obtained with inter-stage postdistortion and interstage predistortion networks implemented in three-stage EDGE power amplifier. Simulations are performed to characterize PA inter-modulation (IM) distortion and their improvements with the proposed linearization network. The proposed linearized PA was fabricated in HBT technology. The measurement results showed a strong influence of linearization network on PA gain flatness and an improvement of 2.5 dB was achieved in the ACPR performance.