Abstract
In this study, a water-based metamaterial absorber (MMA) with ultra-wideband microwave absorption has been proposed and investigated. Using a special structural design, the absorption rate of the absorber exceeds 90% in the frequency range 5.5–27.5 GHz, and the absorber’s thickness is only 5.8 mm. The angular tolerance of the MM absorber shows that the absorber works well under a wide angle of incidence. When bent, the absorber shows omnidirectional absorption characteristics and polarization insensitivity. As the proposed water MM absorber is low cost and easy to manufacture, it could be widely used in electromagnetic stealth and energy harvesting.
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