90 W 15-dB OBO reflective-type DPA

European Microwave Conference (EuMC), pp. 218–221

Abstract

This paper presents a new architecture for three-way power amplifiers with Doherty-type active load modulation (DPA). The PA is composed of a DPA and a balanced amplifier (BA) implemented as a reflector. Thereby, the proposed architecture maintains the complexity of a DPA and extends the output power back-off (OBO) range considerably without introducing further limitations compared to a 2-way DPA. Additionally, the derived design equations pave the way for high output power favoured through a load transformation in the BA. The proposed concept is validated by designing and measuring a prototype exploiting the 48 V GaN technology from Qorvo. The fabricated prototype demonstrates IS-dB OBO over the frequency range from 2.2 GHz to 2.8 GHz with 90 W of peak output power.

Authors 2

1. Muh‐Dey Wei Aachen Chair of High Frequency Electronics

   RWTH Aachen University

   Affiliation as printed

   Chair of High Frequency Electronics,RWTH Aachen University,Germany

   Chair of High Frequency Electronics,RWTH Aachen University, Germany

2. Renato Negra Aachen Chair of High Frequency Electronics

   RWTH Aachen University

   Affiliation as printed

   Chair of High Frequency Electronics,RWTH Aachen University,Germany

   Chair of High Frequency Electronics,RWTH Aachen University, Germany