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 5.5–27.5GHz, and the absorber’s thickness is only 5.8mm. 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 ...
