A 5G Doherty Power Amplifier Design Using Two-Section Impedance Transfer Networks

Authors:
Open Access
Publisher website
Google Scholar
Abstract
This paper introduces a simulation-based design study of a high-performance 2.6 GHz Doherty power amplifier (DPA) designed for 5G New Radio n7 and n38 frequency band applications. The proposed DPA incorporates a branch-line coupler, replacing conventional impedance inverter and impedance transformer networks. Furthermore, an innovative compact two-section impedance matching network is incorporated in the amplifier structure to reduce size and improve performance. This novel approach results in superior performance, particularly at high output power levels. A class-AB amplifier serves as the main stage, whereas a class-C amplifier functions as the auxiliary stage, ensuring efficient power utilization. Operating at 2.6 GHz, the proposed DPA demonstrates a drain efficiency of 45% and a maximum gain of 15 dB. In comparison with a typical DPA, the proposed design occupies 75% of the size, which shows a size reduction of 25%.

This publication has 36 references indexed in Scilit: