A low-profile metamaterial absorber with ultrawideband reflectionless and wide-angular stability  

作　　者：Feihong Lin Zhongming Yan Ping Wang Yu Wang Hongcheng Zhou Haoran Lu 

机构地区：[1]School of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,China [2]Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle,Ministry of Education,Chengdu 610031,China [3]China Academy of Launch Vehicle Technology,Beijing 100076,China

出　　处：《Defence Technology（防务技术）》2024年第4期258-268,共11页Defence Technology

摘　　要：An ultrawideband reflectionless metamaterial absorber(MA)is proposed by replacing the metallic ground with the complementary split-ring resonator(CSRR)structure.The proposed MA exhibits-10 d B reflectivity spectrum from 1 GHz to 20 GHz,which maintains more than 90%absorption from 1.5 GHz to20 GHz.Furthermore,it achieves angle stability for TE and TM polarization at oblique incident angles up to 40°and 65°,respectively.To achieve broadband absorption spectrum,we have adopted a single-layer high-impedance surface(HIS)loaded with a double-layer magnetic material(MM)structure.To further realize the RCS reduction into a lower frequency range,we have employed the scattering cancellation technology into the traditional metallic ground.Finally,we have fabricated a sample exhibiting the 10 d B RCS reduction from 1 GHz to 20 GHz with a thickness of 10 mm.Measurement and simulation results confirm that the proposed MA exhibits excellent comprehensive performance,making it suitable for many practical applications.

关 键 词：Metamaterial absorber(MA) Magnetic material(MM) High-impedance surface(HIS) Scattering cancellation technology ULTRAWIDEBAND Wide-angular stable 

分 类 号：V218[航空宇航科学与技术—航空宇航推进理论与工程] TJ04[兵器科学与技术—兵器发射理论与技术] O441[理学—电磁学]