An Ultrawideband and High-Absorption Circuit-Analog Absorber with Incident Angle-Insensitive Performance

Release time:2022-05-30

Impact Factor:4.388

DOI number:10.1109/TAP.2022.3177490

Affiliation of Author(s):中南大学

Journal:IEEE Transactions on Antennas and Propagation

Key Words:Electromagnetic absorber, square ring, ultrawideband, radar cross section (RCS) reduction

Abstract:This work presents an ultrawideband and high-absorption structure (UHAS) obtained by a fast design method. The proposed analytic approach can simply design single-FSS-layer absorber with ideal performance stability under oblique incidence. With this method, a composite material reinforced Circuit-Analog (CA) absorber is designed, which unit cell of CA sheet is a square ring loaded with chip resistors. At normal incidence, both TE and TM polarization simulation results demonstrate that the reflection coefficient below -10 dB is from 5.8 to 22.2 GHz; meanwhile, the reflection coefficient less than -20 dB covers a bandwidth 7.4 to 19.1 GHz; also, there is a -30 dB absorption band in 8.6 -17.2 GHz. Furthermore, under TE polarization, experiment results indicate that UHAS can maintain an -20 dB absorption band from 7.4 to 18.0 GHz within 40° oblique angle of incidence; -10 dB absorption is from 6.1 to 18.0 GHz within 500 oblique angle of incidence. The good agreement between simulation and measurement validates the proposed method and UHAS. Finally, the UHAS, with a protective layer, will be more stable in practical applications.

First Author:Z. Ma

Indexed by:Journal paper

Correspondence Author:C. Jiang

Discipline:Engineering

First-Level Discipline:Information and Communication Engineering

Document Type:J

ISSN No.:1558-2221

Translation or Not:no

Date of Publication:2022-05-30

Included Journals:SCI

Links to published journals:https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=8