A Phase-Flexible Load Modulation Network Architecture for Wideband Outphasing Power Amplifiers

IEEE Microwave and Wireless Technology Letters 2026

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Authors: Weiwei Wang, S. H. Chen, Hui Gu, Jialin Cai, Giovanni Crupi, Xin Yu Zhou, Gaofeng Wang, Wenquan Q. Che, Quan Xue
DOI: 10.1109/lmwt.2026.3668093
Cited by: 0
References: 19

Abstract

A broadband outphasing power amplifier (OPA) based on a phase-flexible load modulation network (PF-LMN) is presented. The PF-LMN unifies voltage- and current-mode operation, removes the$k \times \lambda $/4 constraint, and enables tunable wideband impedance and phase control using a broadband dual-impedance matching network (BDMN). A$2.5\sim 3.5$GHz GaN prototype achieves$44.3\sim 45.1$dBm output with 71.9%~75.8% efficiency at saturation and 45.6%~80.9% at 6 dB back-off, demonstrating over 30% relative bandwidth.

Fields of Study & Subjects

Advanced Power Amplifier Design GaN-based semiconductor devices and materials Radio Frequency Integrated Circuit Design

Publication details

Journal / source
IEEE Microwave and Wireless Technology Letters
Volume
36
Issue
7
Pages
1172–1175
Publication date
4 March 2026
Language
EN