Abstract
AbstractA polarization‐stable frequency selective rasorber (FSR) is proposed in this article, behaving as a bandpass filter at transmission bands from 2.08 GHz to 2.82 GHz, while performing as an absorber over a wide absorption band from 7.68 GHz to 21.7 GHz. The desired transmission band is obtained by a multilayer frequency selective surface (FSS) realized through interdigital patch layer and meandering inductive wire grid. Meanwhile, the wide absorption band is achieved by using the design of miniaturized lossy layer and harmonic‐suppressed operation in FSS. The symmetry and miniaturization design make the FSR perform satisfactory stability of polarizations and incident angles. Furthermore, due to its small unit‐cell dimension (0.041λ0 × 0.041λ0 × 0.106λ0, where λ0 is the free‐space wavelength at the resonant frequency), the presented FSR can effectively avoid the interference of the grating lobes on radar cross section reduction.
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