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Dual-Polarization Absorptive/Transmissive Frequency-Selective Surface With Tunable Passband
IEEE Transactions on Electromagnetic Compatibility ( IF 2.1 ) Pub Date : 2021-04-09 , DOI: 10.1109/temc.2021.3066483
Qingxin Guo 1 , Zhiqiang Zhao 2 , Jianxun Su 3 , Zengrui Li 4
Affiliation  

A dual-polarization frequency-selective structure with a tunable passband and two absorptive bands is presented. Based on an equivalent circuit model (ECM), the working principle is investigated first. The values of components in the ECM are derived from the required performances and are mapped to the structure of an initial design, which is designed by cascading of an absorptive frequency-selective surface (FSS) realized with dipole-like elements and a lossless bandpass FSS achieved with square ring slot. For tuning the passband, varactors and biasing networks are added into the initial design. The adding of the varactors and biasing networks significantly affects the performance, and brings about the emergence of singular resonances. The approaches for mitigating the effects and the techniques for suppressing the singular resonances are proposed. Simulated results show that, between two absorptive bands, a passband is tuned from 3.33 to 5.13 GHz if the capacitances are decreased from 0.5 to 0.15 pF. A prototype is fabricated and measured. Measured results show that the passband is altered from 3.56 to 4.35 GHz as the reverse bias voltage of the used varactors is increased from 6 to 18 V.

中文翻译:

具有可调通带的双极化吸收/透射频率选择表面

提出了一种具有可调通带和两个吸收带的双极化频率选择结构。基于等效电路模型(ECM),首先研究工作原理。ECM 中组件的值源自所需的性能,并映射到初始设计的结构,该结构是通过级联使用类偶极子元件和无损带通 FSS 实现的吸收性频率选择表面 (FSS) 来设计的用方形环槽实现。为了调谐通带,在初始设计中添加了变容二极管和偏置网络。变容二极管和偏置网络的添加显着影响性能,并导致奇异共振的出现。提出了减轻影响的方法和抑制奇异共振的技术。仿真结果表明,在两个吸收带之间,如果电容从 0.5 pF 降低到 0.15 pF,通带将从 3.33 GHz 调谐到 5.13 GHz。制造和测量原型。测量结果表明,随着所用变容二极管的反向偏置电压从 6 V 增加到 18 V,通带从 3.56 GHz 变为 4.35 GHz。
更新日期:2021-04-09
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