Abstract
A metamaterial absorber (MA) based on snowflake-shaped resonators is designed and experimentally demonstrated in this paper. Such an MA possesses a nearly perfect absorption with wide angle of incidence and polarization independence. The measurement in a rectangular waveguide system shows the absorptivity as high as 99.5% at 11.28 GHz. Furthermore, the operating frequency can be flexibly controlled by adjusting the lengths of the snowflake's branches, while keep the peak absorptivities nearly uniform (>97.5%). The proposed MA is sure to find wide applications in, for instance, stealth technology, thermal detector and imaging.
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