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Title: 3D absorptive frequency-selective reflection and transmission structures with dual absorption bands
Authors: Yu, Yufeng
Luo, Guo Qing
Ahmed Abdelmottaleb Omar
Liu, Xuan
Yu, Weiliang
Hao, Zhang Cheng
Shen, Zhongxiang
Keywords: Absorptive Frequency-selective Reflector
Absorptive Frequency-selective Transmission Structure
Issue Date: 2018
Source: Yu, Y., Luo, G. Q., Ahmed Abdelmottaleb Omar, Liu, X., Yu, W., Hao, Z. C., & Shen, Z. (2018). 3D absorptive frequency-selective reflection and transmission structures with dual absorption bands. IEEE Access, 6, 72880-72888. doi:10.1109/ACCESS.2018.2881744
Series/Report no.: IEEE Access
Abstract: This paper presents a 3D absorptive frequency-selective reflection structure (AFSR) and absorptive frequency-selective transmission structure (AFST) with one reflection/transmission band and two absorption bands. The 3D AFSR utilizes the intrinsic reflection band and higher order absorption band of a wideband 3D absorber. By simply loading a printed gap capacitor in the structure, the reflection band can be easily tuned by varying the capacitance of the capacitor. A design example is presented, with a reflection band of 24.7% fractional bandwidth (FBW), a lower absorption band of 72.5% FBW, and a higher absorption band of 48.6% FBW. A 3D AFST composed of the 3D AFSR and a parallel-plate waveguide is then proposed. Its general operating principle is demonstrated, such that the 3D AFST can be seen as a combination of a 3D AFSR and a 3D band-pass FSS, which can independently contribute to the absorption and transmission, respectively. A set of guidelines is proposed to facilitate the design. A prototype of the proposed AFST is fabricated and measured. The measured results show that the transmission band is with a minimum insertion loss of 0.4 dB and an FBW of 30%. Moreover, the lower and higher absorption bands are with 63.9 % and 47.6 % FBW, respectively. The proposed AFST has a simpler structure, wider lower absorption bandwidth, and thinner thickness compared with previous structures.
DOI: 10.1109/ACCESS.2018.2881744
Rights: © 2018 IEEE. Translations and content mining are permitted for academic research only. Personal use is also permitted, but republication/redistribution requires IEEE permission. See for more information.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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