Space Star Technology Co., Ltd., Beijing 100086, China.
School of Microelectronics and Communication Engineering, Chongqing University, Chongqing 400044, China.
Sensors (Basel). 2023 Apr 11;23(8):3882. doi: 10.3390/s23083882.
To be compatible with future wireless communication systems, it is very necessary to extend the bandwidth of the Doherty power amplifier (DPA). In this paper, a modified combiner integrated with a complex combining impedance is adopted to enable an ultra-wideband DPA. Meanwhile, a comprehensive analysis is performed on the proposed method. It is illustrated that the proposed design methodology can provide power amplifier (PA) designers with more freedom in implementing ultra-wideband DPAs. As a concept of proof, a DPA working over 1.2-2.8 GHz (a relative bandwidth of 80%) is designed, fabricated and measured in this work. Experimental results showed that the fabricated DPA delivers a saturation output power of 43.2-44.7 dBm with a gain of 5.2-8.6 dB. Meantime, the fabricated DPA achieves a saturation drain efficiency (DE) of 44.3-70.4% and a 6 dB back-off DE of 38.7-57.6%.
为了与未来的无线通信系统兼容，非常有必要扩展 Doherty 功率放大器 (DPA) 的带宽。本文采用一种改进的组合器，集成了复杂的组合阻抗，实现了超宽带 DPA。同时，对所提出的方法进行了全面分析。结果表明，所提出的设计方法可为功率放大器 (PA) 设计人员在实现超宽带 DPA 方面提供更大的自由度。作为概念验证，本文设计、制作和测量了一个工作在 1.2-2.8GHz（相对带宽为 80%）的 DPA。实验结果表明，所制作的 DPA 在 43.2-44.7dBm 的饱和输出功率下，增益为 5.2-8.6dB。同时，所制作的 DPA 实现了 44.3-70.4%的饱和漏极效率 (DE) 和 38.7-57.6%的 6dB 回退 DE。
