Design of an optically-transparent ultra-broadband microwave absorber  

作　　者：高冕 陈强 郑月军 袁方 孙占山 付云起 Mian Gao;Qiang Chen;Yue-Jun Zheng;Fang Yuan;Zhan-Shan Sun;Yun-Qi Fu(College of Electronic Science and Technology,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]College of Electronic Science and Technology,National University of Defense Technology,Changsha 410073,China

出　　处：《Chinese Physics B》2023年第8期289-295,共7页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.61901492 and 61901493);Provincial Natural Science Foundation of Hunan(Grant No.2022JJ30665)。

摘　　要：The optical window of low-observable platform needs to be compatible with ultra-broadband absorption,hence an optically-transparent absorber with ultra-broadband absorption is designed and analyzed in this paper.The transparent materials indium-tin-oxide(ITO)film and polymethylmethacrylate(PMMA)are selected as the lossy layer and the supporting dielectric layer,respectively.The optically-transparent ultra-broadband absorber(OT-UBA)is composed of three layers of ITO square patterns,three layers of PMMA dielectric and a uniform ITO plane.The ITO square patterns can realize arbitrary equivalent series of RC(resistor and capacitor)circuit,so that three layers of ITO square patterns together with the ITO plane can achieve ultra-broadband absorption based on the equivalent circuit optimization.Measured results shows that the 90%-absorption bandwidth covers 2-17 GHz while the light transmittance achieves 59.6%with a total thickness of only 12.9 mm.

关 键 词：ultra-broadband absorbers optically-transparent equivalent circuit optimization 

分 类 号：TB34[一般工业技术—材料科学与工程]