中国物理B ›› 2015, Vol. 24 ›› Issue (6): 64201-064201.doi: 10.1088/1674-1056/24/6/064201
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
李立扬, 王军, 杜红亮, 王甲富, 屈绍波
Li Li-Yang (李立扬), Wang Jun (王军), Du Hong-Liang (杜红亮), Wang Jia-Fu (王甲富), Qu Shao-Bo (屈绍波)
摘要: A multi-band absorber composed of high-permittivity hexagonal ring dielectric resonators and a metallic ground plate is designed in the microwave band. Near-unity absorptions around 9.785 GHz, 11.525 GHz, and 12.37 GHz are observed for this metamaterial absorber. The dielectric hexagonal ring resonator is made of microwave ceramics with high permittivity and low loss. The mechanism for the near-unity absorption is investigated via the dielectric resonator theory. It is found that the absorption results from electric and magnetic resonances where enhanced electromagnetic fields are excited inside the dielectric resonator. In addition, the resonance modes of the hexagonal resonator are similar to those of standard rectangle resonators and can be used for analyzing hexagonal absorbers. Our work provides a new research method as well as a solid foundation for designing and analyzing dielectric metamaterial absorbers with complex shapes.
中图分类号: (Wave propagation, transmission and absorption)