中国物理B ›› 2023, Vol. 32 ›› Issue (8): 84102-084102.doi: 10.1088/1674-1056/ac9a39

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Design of an optically-transparent ultra-broadband microwave absorber

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)†   

  1. College of Electronic Science and Technology, National University of Defense Technology, Changsha 410073, China
  • 收稿日期:2022-08-11 修回日期:2022-10-09 接受日期:2022-10-14 发布日期:2023-07-28
  • 通讯作者: Yun-Qi Fu E-mail:yunqifu@nudt.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos.61901492 and 61901493) and Provincial Natural Science Foundation of Hunan (Grant No.2022JJ30665).

Design of an optically-transparent ultra-broadband microwave absorber

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)†   

  1. College of Electronic Science and Technology, National University of Defense Technology, Changsha 410073, China
  • Received:2022-08-11 Revised:2022-10-09 Accepted:2022-10-14 Published:2023-07-28
  • Contact: Yun-Qi Fu E-mail:yunqifu@nudt.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos.61901492 and 61901493) and Provincial Natural Science Foundation of Hunan (Grant No.2022JJ30665).

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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

Abstract: 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.

Key words: ultra-broadband absorbers, optically-transparent, equivalent circuit optimization

中图分类号:  (Electromagnetic wave propagation; radiowave propagation)

  • 41.20.Jb
42.25.Bs (Wave propagation, transmission and absorption) 12.20.Fv (Experimental tests)