Abstract
AbstractA dual‐polarized frequency‐selective absorber (FSA) with wide transmission band is proposed and designed. First, a three‐layered antenna‐filter‐antenna structure is designed to construct a wide passband. Then, a lossy resonator is introduced to achieve the absorption properties. Therefore, the resultant FSA can achieve one wide passband in higher frequencies and one absorptive band at lower frequencies, and thus can be applied as a radome of an antenna system. In the transmission band (3.51‐5.33 GHz), the signal can transmit through the absorber. Meanwhile, in the absorption band (1.67‐3.10 GHz), the coming wave is absorbed to reduce the radar cross section of the antenna. The total thickness of the FSA is less than 0.1λ L at the lowest operating frequency.
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