Design of an ultra-wideband thin frequency selective surface absorber

Li Xi; Wang Dongjun; Zhang Yuan; Zhao Xiang; Yan Liping

doi:10.11884/HPLPB202436.230443

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Li Xi, Wang Dongjun, Zhang Yuan, et al. Design of an ultra-wideband thin frequency selective surface absorber[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202436.230443

Citation:

Li Xi, Wang Dongjun, Zhang Yuan, et al. Design of an ultra-wideband thin frequency selective surface absorber[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202436.230443

Li Xi, Wang Dongjun, Zhang Yuan, et al. Design of an ultra-wideband thin frequency selective surface absorber[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202436.230443

Citation:

Li Xi, Wang Dongjun, Zhang Yuan, et al. Design of an ultra-wideband thin frequency selective surface absorber[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202436.230443

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Design of an ultra-wideband thin frequency selective surface absorber

doi: 10.11884/HPLPB202436.230443

Li Xi^1
,,
Wang Dongjun²,
Zhang Yuan^{2, 3},
Zhao Xiang¹,
Yan Liping^{1
,
,}

1.
College of Electronic and Information Engineering, Sichuan University, Chengdu 610065, China
2.
Chengdu Aircraft Industry (Group) Company Limited, Chengdu 610073, China
3.
School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China

Received Date: 2023-12-12
Accepted Date: 2024-02-07
Rev Recd Date: 2024-02-07

Available Online: 2024-03-16

Abstract

Abstract

This paper presents an novel ultra-wideband thin frequency selective surface (FSS) absorber loaded with lumped resistors. The proposed absorber consists of a single FSS lossy layer with a single resonance structure, and it features thinness, ultra-wide bandwidth and polarization-insensitivity. The absorber is designed with lumped resistors loaded at positions that deviates from the central symmetry axis of the unit cell. It also features the nonuniformly wide metallic strips and the addition of branches with circular tops. All these specific design effectively enhances the bandwidth of the absorber. Both an equivalent circuit model and full wave simulation demonstrate that the proposed absorber achieves over 90% absorption in the frequency range of 6.0～26.77 GHz, with a fractional bandwidth of 126.8%. The thickness of the proposed absorber is 0.086 λ_L (λ_L is the wavelength at the lowest frequency), which is only 1.09 times the ultimate thickness based on Rozanov’s theory. A prototype of the proposed absorber is fabricated, and good agreements between experimental and simulated results are observed, validating the effectiveness of the design.
- frequency selective surface,
- circuit analog absorber,
- thin,
- ultra-wideband,
- lumped resistor loaded

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References(20)

References

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