中国物理B ›› 2023, Vol. 32 ›› Issue (8): 84102-084102.doi: 10.1088/1674-1056/ac9a39
Mian Gao(高冕), Qiang Chen(陈强), Yue-Jun Zheng(郑月军), Fang Yuan(袁方), Zhan-Shan Sun(孙占山), and Yun-Qi Fu(付云起)†
Mian Gao(高冕), Qiang Chen(陈强), Yue-Jun Zheng(郑月军), Fang Yuan(袁方), Zhan-Shan Sun(孙占山), and Yun-Qi Fu(付云起)†
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.
中图分类号: (Electromagnetic wave propagation; radiowave propagation)