Dual-Passband Reconfigurable FSS With Concurrently Tunable and Connected Passbands

IF 4.5 1区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Microwave Theory and Techniques Pub Date : 2025-04-15 DOI:10.1109/TMTT.2025.3556076

Ming Liao;Xiaolong Weng;Mei Bi

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Abstract

In this article, a dual-passband reconfigurable frequency-selective surface (DRFSS) with continuous and connected passband tuning ranges is proposed. First, an equivalent circuit analysis of the DRFSS is conducted to evaluate the impact of design parameters on the two passbands’ transmission performance. In addition, the influence of varactor diodes on the tunable bandwidth is analyzed. Second, based on the analysis, a design method is proposed. Third, a composite unit cell structure is developed, incorporating two parallel groups of identical varactors for simultaneous dual-passband tunability, with an isolated bias network ensuring polarization-independent performance. Finally, prototypes for parallel-plate waveguide (PPW) and free-space measurements are fabricated and measured. Experimental results agree well with simulations, verifying the superior performance and feasibility of the proposed DRFSS. Key features include a tunable relative bandwidth (RBW) of up to 119.0%, high-transmission efficiency within the passbands, and the distinctive characteristic of connected tunable passbands. In addition, the design can be adapted for independently tunable passbands as needed.

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双通带可重构FSS并发可调谐和连接的通带

本文提出了一种具有连续和连通通带调谐范围的双通带可重构选频曲面（DRFSS）。首先，对DRFSS进行等效电路分析，以评估设计参数对两个通带传输性能的影响。此外，还分析了变容二极管对可调带宽的影响。其次，在分析的基础上，提出了设计方法。第三，开发了一种复合单元电池结构，结合两组平行的相同变容管，同时具有双通带可调谐性，并具有隔离的偏置网络，确保与极化无关的性能。最后，制作并测量了平行板波导和自由空间测量的原型。实验结果与仿真结果吻合较好，验证了所提DRFSS的优越性能和可行性。主要特点包括高达119.0%的可调相对带宽（RBW）、通带内的高传输效率以及连接可调通带的独特特性。此外，该设计可以根据需要适应独立可调的通带。

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

IEEE Transactions on Microwave Theory and Techniques 工程技术-工程：电子与电气

CiteScore

8.60

自引率

18.60%

发文量

486

审稿时长

6 months

期刊介绍： The IEEE Transactions on Microwave Theory and Techniques focuses on that part of engineering and theory associated with microwave/millimeter-wave components, devices, circuits, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals. This includes scientific, technical, and industrial, activities. Microwave theory and techniques relates to electromagnetic waves usually in the frequency region between a few MHz and a THz; other spectral regions and wave types are included within the scope of the Society whenever basic microwave theory and techniques can yield useful results. Generally, this occurs in the theory of wave propagation in structures with dimensions comparable to a wavelength, and in the related techniques for analysis and design.