Broadband dual-input doherty power amplifier design based on a simple adaptive power dividing ratio function

IF 3.1 3区计算机科学 Q2 TELECOMMUNICATIONS

China Communications Pub Date : 2024-05-01 DOI:10.23919/JCC.ea.2021-0847.202401

Zhijiang Dai, Zhong Kang, Mingyu Li, Jingzhou Pang, Jin Yi

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引用次数: 0

Abstract

In this paper, a simple adaptive power dividing function for the design of a dual-input Doherty power amplifier (DPA) is presented. In the presented approaches, the signal separation function (SSF) at different frequency points can be characterized by a polynomial. And in the practical test, the coefficients of SSF can be determined by measuring a small number of data points of input power. Same as other dual-input DPAs, the proposed approach can also achieve high output power and back-off efficiency in a broadband operation band by adjusting the power distribution ratio flexibly. Finally, a 1.5–2.5 GHz high-efficiency dual-input Doherty power amplifier is implemented according to this approach. The test results show that the peak power is 48.6–49.7dBm, and the 6-dB back-off efficiency is 51.0–67.0%, and the saturation efficiency is 52.4–74.6%. The digital predistortion correction is carried out at the frequency points of 1.8/2.1GHz, and the adjacent channel power ratio is lower than −54.5dBc. Simulation and experiment results can verify the effectiveness and correctness of the proposed method.

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基于简单自适应功率分配比例函数的宽带双输入多赫兹功率放大器设计

本文介绍了一种用于设计双输入 Doherty 功率放大器 (DPA) 的简单自适应功率分配函数。在所提出的方法中，不同频点的信号分离函数（SSF）可以用多项式来表征。在实际测试中，可以通过测量少量输入功率数据点来确定 SSF 的系数。与其他双输入 DPA 一样，所提出的方法也可以通过灵活调整功率分配比例，在宽带工作频段内实现高输出功率和背离效率。最后，根据这种方法实现了 1.5-2.5 GHz 的高效双输入 Doherty 功率放大器。测试结果表明，峰值功率为 48.6-49.7dBm，6-dB 回落效率为 51.0-67.0%，饱和效率为 52.4-74.6%。在 1.8/2.1GHz 的频点上进行数字预失真校正，相邻信道功率比低于-54.5dBc。仿真和实验结果验证了所提方法的有效性和正确性。

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来源期刊

China Communications 工程技术-电信学

CiteScore

8.00

自引率

12.20%

发文量

2868

审稿时长

8.6 months

期刊介绍： China Communications (ISSN 1673-5447) is an English-language monthly journal cosponsored by the China Institute of Communications (CIC) and IEEE Communications Society (IEEE ComSoc). It is aimed at readers in industry, universities, research and development organizations, and government agencies in the field of Information and Communications Technologies (ICTs) worldwide. The journal's main objective is to promote academic exchange in the ICTs sector and publish high-quality papers to contribute to the global ICTs industry. It provides instant access to the latest articles and papers, presenting leading-edge research achievements, tutorial overviews, and descriptions of significant practical applications of technology. China Communications has been indexed in SCIE (Science Citation Index-Expanded) since January 2007. Additionally, all articles have been available in the IEEE Xplore digital library since January 2013.