Abstract
This paper presents a dual-polarization dualtransmission band frequency selective rasorber (FSR) with selective in-band transmission responses. The proposed FSR is a two-tier geometry; the top resistive layer consists of a periodic arrangement of convoluted cross-dipole pattern, whereas the bottom lossless layer comprises three square slots of different sizes. A wide absorption band containing two in-band transmission peaks are obtained from the top layer, and the bottom layer is used to assist the overall absorption response as well as realize highly selective transmission windows. Furthermore, the proposed structure is dual-polarized and has angularly stable characteristic upto 45o incident angle. The geometry has also been analyzed with respect to surface current distributions and parametric variations. The proposed FSR, while simulated, shows two transmission bands at 5.85 GHz and 7.10 GHz with 3.10 dB and 3.90 dB insertion losses, respectively. A wide absorption band having absorptivity more than 80% is achieved around the transmission bands in the frequency ranges of 2.83 to 5.10 GHz, 6.18 to 6.82 GHz, and 7.58 to 9.75 GHz.
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