Affiliation:
1. School of Information Science and Engineering Southeast University Nanjing China
2. School of Electrical and Electronic Engineering University College Dublin Dublin Ireland
Abstract
SummaryThis paper presents Doherty power amplifier (DPA) based on gallium nitride (GaN) technology, incorporating a parallel grounded network with series RC elements in front of the carrier and peaking amplifiers to enhance circuit stability. In comparison to the traditional series network with parallel RC structure, this configuration effectively reduces the sensitivity of the stability factor K to the capacitance value within the stability network. Consequently, it mitigates the impact on various performance indicators such as gain and drain efficiency, addressing the issue of measurement performance deviation caused by inaccurate capacitance models in the simulation files, which is particularly crucial for DPA. As a result, the circuit exhibits improved consistency in design and processing. With full band stability, the DPA achieves a saturation output power of approximately 29.8 dBm at 28 GHz, a saturation efficiency of 38.2%, and a 6‐dB back‐off efficiency of 29.6%.
Funder
National Natural Science Foundation of China
Jiangsu Provincial Key Research and Development Program
Subject
Applied Mathematics,Electrical and Electronic Engineering,Computer Science Applications,Electronic, Optical and Magnetic Materials
Cited by
1 articles.
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1. A novel dual‐band forward/inverse Doherty power amplifier;International Journal of Circuit Theory and Applications;2024-05-20