Low-Profile Absorptive Frequency Selective Structure With Wide Transmission Band and Absorption Band

IF 1 4区 工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC
Jiahui Ye, Junbo Chen, Yuchang Chen, Weiliang Yu, Guo Qing Luo
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引用次数: 0

Abstract

This paper proposes a low-profile absorptive frequency-selective structure (AFSS) that exhibiting a wide absorption band and a wide low-insertion-loss transmission band. The AFSS is composed of two layers, separated by an air spacer layer. In the lossy layer, two meander-line loops loaded with lumped resistors are used to broaden the absorption band. Additionally, a frequency selective surface (FSS) based on a substrate-integrated waveguide (SIW) is proposed to achieve a wide transmission band. To reduce the insertion loss of the transmission band in the high frequency band, numerous circular holes are drilled in the substrate. Furthermore, two independent square patches are employed at the upper and bottom layers of the substrate to improve the performance stability under oblique incidence. The proposed bandpass AFSS achieves an absorption band from 2.67 to 8.58 GHz, with a fractional bandwidth of 105.07% and a 1-dB transmission band between 10.25 and 15.04 GHz, with a fractional bandwidth of 37.88%. A prototype is fabricated, assembled and tested, and the results exhibit a good agreement with the simulation results. And the thickness of the proposed AFSS is only 0.087λL, indicating that the design is very thin.

具有宽透射带和宽吸收带的低轮廓吸收选频结构
本文提出了一种具有宽吸收带和宽低插入损耗传输带的低轮廓吸收频率选择结构(AFSS)。AFSS由两层组成,由空气间隔层隔开。在损耗层中,两个装有集总电阻的曲线形环路被用来拓宽吸收带。此外,提出了一种基于基片集成波导(SIW)的频率选择表面(FSS)来实现宽传输频带。为了减少传输带在高频波段的插入损耗,在基板上钻了许多圆孔。此外,在衬底的上层和底层采用了两个独立的方形贴片,以提高斜入射下的性能稳定性。本文提出的带通AFSS实现了2.67 ~ 8.58 GHz的吸收带,分数带宽为105.07%;实现了10.25 ~ 15.04 GHz的1 db传输带,分数带宽为37.88%。样机的制作、组装和测试结果与仿真结果吻合较好。所设计的AFSS的厚度仅为0.087λL,表明设计非常薄。
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来源期刊
Microwave and Optical Technology Letters
Microwave and Optical Technology Letters 工程技术-工程:电子与电气
CiteScore
3.40
自引率
20.00%
发文量
371
审稿时长
4.3 months
期刊介绍: Microwave and Optical Technology Letters provides quick publication (3 to 6 month turnaround) of the most recent findings and achievements in high frequency technology, from RF to optical spectrum. The journal publishes original short papers and letters on theoretical, applied, and system results in the following areas. - RF, Microwave, and Millimeter Waves - Antennas and Propagation - Submillimeter-Wave and Infrared Technology - Optical Engineering All papers are subject to peer review before publication
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