Application of Spoof Surface Plasmon Polaritons for the Design of Sequential Load Modulated Balanced Amplifier

IF 1.7 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC International Journal of Numerical Modelling-Electronic Networks Devices and Fields Pub Date : 2025-03-03 DOI:10.1002/jnm.70029

Hongbo Zhang, Giovanni Crupi, Zhen Liao, Jialin Cai

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Abstract

Spoof surface plasmon polariton (SSPP) controls and manipulates electromagnetic waves in the microwave frequency range through ultrathin corrugated metallic strips, making it suitable for use with microwave devices. In the current state of research, SSPPs are primarily used to design passive circuits and single-device power amplifiers (PAs). This study combines the SSPP design methodology with sequential load modulated balanced amplifiers (SLMBA) topology to develop a high back-off (BO) efficiency load-modulated PA. By using the proposed SSPP theory and method, input and output matching networks based on slow-wave metamaterials are designed for balanced amplifiers (BAs) and carrier amplifiers (CAs) in the SLMBA. The designed metamaterial-based SLMBA was fabricated and demonstrated to have a saturated output power of 43 dBm, a BO range of 10 dB, and a BO efficiency maintained above 56.5% within the frequency range of 1.8–2.1 GHz, with a size of 72 mm × 101 mm, which represents a 38% reduction in size when compared to traditional transmission-line-based SLMBAs. A 20-MHz 5G NR signal has been used to implement digital pre-distortion (DPD) and enhance SLMBA linearity.

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欺骗表面等离子体激元在顺序负载调制平衡放大器设计中的应用

欺骗表面等离子激元（SSPP）通过超薄的波纹金属条控制和操纵微波频率范围内的电磁波，使其适合与微波器件一起使用。在目前的研究状态下，sspp主要用于设计无源电路和单器件功率放大器（PAs）。本研究将SSPP设计方法与顺序负载调制平衡放大器（SLMBA）拓扑结构相结合，以开发高回退（BO）效率的负载调制放大器。利用所提出的SSPP理论和方法，设计了基于慢波超材料的SLMBA中平衡放大器和载波放大器的输入输出匹配网络。设计的基于超材料的SLMBA具有43 dBm的饱和输出功率，10 dB的BO范围，在1.8-2.1 GHz频率范围内BO效率保持在56.5%以上，尺寸为72 mm × 101 mm，与传统的基于传输线的SLMBA相比，尺寸减小了38%。采用20mhz 5G NR信号实现数字预失真（DPD）并增强SLMBA线性度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Numerical Modelling-Electronic Networks Devices and Fields 工程技术-工程：电子与电气

CiteScore

4.60

自引率

6.20%

发文量

101

审稿时长

>12 weeks

期刊介绍： Prediction through modelling forms the basis of engineering design. The computational power at the fingertips of the professional engineer is increasing enormously and techniques for computer simulation are changing rapidly. Engineers need models which relate to their design area and which are adaptable to new design concepts. They also need efficient and friendly ways of presenting, viewing and transmitting the data associated with their models. The International Journal of Numerical Modelling: Electronic Networks, Devices and Fields provides a communication vehicle for numerical modelling methods and data preparation methods associated with electrical and electronic circuits and fields. It concentrates on numerical modelling rather than abstract numerical mathematics. Contributions on numerical modelling will cover the entire subject of electrical and electronic engineering. They will range from electrical distribution networks to integrated circuits on VLSI design, and from static electric and magnetic fields through microwaves to optical design. They will also include the use of electrical networks as a modelling medium.