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A Dual-Polarized Frequency Selective Rasorber With Wide Transmission Band
Radio Science ( IF 1.6 ) Pub Date : 2021-04-14 , DOI: 10.1029/2020rs007147
W. H. Jiao 1 , Y. M. Chang 1 , L. Wang 1 , W. J. Wu 1
Affiliation  

In this paper, a novel and simple dual-polarized frequency-selective rasorber (FSR) which has a wide absorption band including a wide transmission band was presented. Detailed equivalent circuit was derived to accurately predict the frequency responses of the structure. Based on reasonable equivalent analysis of a traditional metal grid structure, a modified structure with improved performance was proposed. The structure consists of a lossy frequency-selective surface (FSS) constructed with metal rings connected by center loaded strips as the top layer, and a broadband transmission FSS at the bottom, while the two layers are separated by air. To validate our proposal, a prototype was fabricated and measured. The measured results are in good agreements with simulations under normal incidence, which indicates a broad absorption bandwidth of 80% that from 3.40 to 8.16 GHz; in the meantime, a wide transmission band with an insertion loss of less than −1.25 dB is ranging from 9.03 to 12.01 GHz. It should be pointed out that, the reflection from the whole structure in the operation band can be kept below −10 dB from 4.15 to 11.87 GHz.

中文翻译:

一种宽传输带双极化频率选择吸收器

在本文中,提出了一种新颖且简单的双极化频率选择吸收器(FSR),它具有宽吸收带,包括宽传输带。推导出详细的等效电路以准确预测结构的频率响应。在对传统金属网格结构进行合理等效分析的基础上,提出了一种改进性能的改进结构。该结构由一个有损选频表面 (FSS) 构成,金属环由中心加载条连接作为顶层,底部是宽带传输 FSS,而两层被空气隔开。为了验证我们的提议,我们制造并测量了一个原型。测量结果与法向入射下的模拟非常吻合,这表明从 3.40 到 8.16 GHz 的吸收带宽为 80%;同时,插入损耗小于-1.25 dB的宽传输频带范围为9.03至12.01 GHz。需要指出的是,在4.15至11.87 GHz的工作频段内,整个结构的反射可以保持在-10 dB以下。
更新日期:2021-04-14
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