Wide-angle metamaterial absorber with highly insensitive absorption for TE and TM modes

被引：67
作者：
Amiri, Majid [1 ]
Tofigh, Farzad [1 ]
Shariati, Negin [1 ]
Lipman, Justin [1 ]
Abolhasan, Mehran [1 ]
机构：
[1] Univ Technol Sydney, Sch Elect & Data Engn, Sydney, NSW 2007, Australia
来源：
SCIENTIFIC REPORTS | 2020年 / 10卷 / 01期
基金：
日本学术振兴会;
关键词：
PLASMONIC PERFECT ABSORBER;
D O I：
10.1038/s41598-020-70519-8
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Being incident and polarization angle insensitive are crucial characteristics of metamaterial perfect absorbers due to the variety of incident signals. In the case of incident angles insensitivity, facing transverse electric (TE) and transverse magnetic (TM) waves affect the absorption ratio significantly. In this scientific report, a crescent shape resonator has been introduced that provides over 99% absorption ratio for all polarization angles, as well as 70% and 93% efficiencies for different incident angles up to theta=80 degrees for TE and TM polarized waves, respectively. Moreover, the insensitivity for TE and TM modes can be adjusted due to the semi-symmetric structure. By adjusting the structure parameters, the absorption ratio for TE and TM waves at theta=80 degrees has been increased to 83% and 97%, respectively. This structure has been designed to operate at 5 GHz spectrum to absorb undesired signals generated due to the growing adoption of Wi-Fi networks. Finally, the proposed absorber has been fabricated in a 20x20 array structure on FR-4 substrate. Strong correlation between measurement and simulation results validates the design procedure.
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页数：13
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