An all-dielectric metamaterial absorber based on water resonator encapsulated in resin container is proposed. The absorber can afford the maximum absorption up to 98% at 190 GHz, as well as the wide absorption frequency range from 115 GHz to 300 GHz and a nearly 90% relative absorption bandwidth. The role of water resonator sealed in the resin shell in improving absorption capability is demonstrated by the comparison result that the proposed absorber is superior to pure water or pure resin absorber with the same dimension and interpreted by a further study on the fields and power loss density distributions. Moreover, the proposed absorber can remain excellent absorption performance even for the oblique incidence with large angles. Besides the outstanding absorption performance, the proposed absorber has the advantage of low cost endowed by the use of water, which makes it promising for EM compatibility in the millimetre-wave and high-power cases.

提出了一种基于树脂封装的水谐振器的全介质超材料吸收体。该吸收器在 190 GHz 时可提供高达 98% 的最大吸收，以及从 115 GHz 到 300 GHz 的宽吸收频率范围和近 90% 的相对吸收带宽。树脂壳中密封的水谐振器在提高吸收能力方面的作用通过对比结果表明，所提出的吸收器优于相同尺寸的纯水或纯树脂吸收器，并通过对场和功率损耗密度的进一步研究来解释分布。此外，即使对于大角度的倾斜入射，所提出的吸收体也可以保持优异的吸收性能。除了出色的吸收性能，