An analog predistortion linearizer with independently tunable gain and adjustable shape using an asymmetric reflective structure

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-01 DOI:10.1016/j.aeue.2024.155620

Benhua Ma , Hailin Deng , Dewei Zhang , Hang Qian , Dalong Lv , Dongfang Zhou

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引用次数: 0

Abstract

This paper presents a novel reflective analog predistortion (RAPD) linearizer with independently tunable gain conversion and tunable shape. Based on an asymmetric reflective topology consisting of a nonlinear branch and a linear branch, this linearizer achieves a simple circuit structure. Independent tuning of gain conversion of this linearizer is realized by changing the bias voltage of the linear branch. Meanwhile, the shape of the amplitude compensation of the linearizer can be adjusted by changing the bias voltage of the nonlinear impedance matching network (NIMN) in the nonlinear branch. The theoretical analysis and tuning process of this linearizer are discussed in detail. The tunability of the APD is verified by simulation and measurement results, which are in agreement. Furthermore, a Ku-band 50 W solid state power amplifier (SSPA) is linearized by the APD. The third-order intermodulation (C/IM3) is greater than 26.1 dBc at 2 dB output power backoff (OPBO) over the operating band of 10.7–12.7 GHz.

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来源期刊

Aeu-International Journal of Electronics and Communications 工程技术-电信学

CiteScore

6.90

自引率

18.80%

发文量

292

审稿时长

4.9 months

期刊介绍： AEÜ is an international scientific journal which publishes both original works and invited tutorials. The journal''s scope covers all aspects of theory and design of circuits, systems and devices for electronics, signal processing, and communication, including: signal and system theory, digital signal processing network theory and circuit design information theory, communication theory and techniques, modulation, source and channel coding switching theory and techniques, communication protocols optical communications microwave theory and techniques, radar, sonar antennas, wave propagation AEÜ publishes full papers and letters with very short turn around time but a high standard review process. Review cycles are typically finished within twelve weeks by application of modern electronic communication facilities.