Open AccessBroadband microwave absorption utilizing water-based metamaterial structures
Author(s) -
Junming Zhao,
Shu Wei,
Cheng Wang,
Ke Chen,
Bo Zhu,
Tian Jiang,
Yijun Feng
Publication year - 2018
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.008522
Subject(s) - microwave , metamaterial , broadband , materials science , metamaterial absorber , optics , optoelectronics , absorption (acoustics) , bandwidth (computing) , dielectric , tunable metamaterials , telecommunications , physics , computer science , composite material
In this paper, broadband microwave absorbers utilizing water-based metamaterial structure elements have been proposed and investigated. We employ water into the metamaterial structure unit-cell of the absorber as primary resonant elements such as the water-droplet, or water-tube structure. By investigating the resonant modes and the coupling between the water elements and the surrounding dielectrics, it is found the inherent multi-resonance of the proposed metamaterial structures could result in a broadband microwave absorption. For water-droplets design, 90% microwave absorption has been achieved from 7.5 GHz to 15 GHz, while for water-tube design, a much broader bandwidth from 5 GHz to 15 GHz is obtained for nearly 90% microwave absorption. The broadband absorption performance has been verified by both full wave simulation and experimental measurement. We believe the proposed broadband water-based absorber may find some applications in microwave stealth and electromagnetic compatibility technology.