A Novel Multi-Band Polarization Insensitive Frequency Selective Surface Based on Centrosymmetric L-Shaped Metal Strips
Keywords:
Centrosymmetric bended micrstrip, FSS, multi-band, polarization insensitiveAbstract
In this paper, a novel frequency selective surface (FSS) based on rotationally symmetric bended microstrips is investigated. The unit element consists of twelve L-shaped metal strips and a dielectric substrate. Bended L-shaped strips have different equivalent electric lengths corresponding to different resonant frequencies, which result in multi-band frequency characteristic. Meanwhile, the symmetric metal strips make the FSS polarization insensitive. The numerical experiments demonstrate that the FSS structure has fifteen stop-bands in the frequency band from 6 GHz to 20 GHz, and a good polarization stability as well. Moreover, the FSS design such as the inner radius of L-shaped metal strips, the dimensions of dielectric substrate and the width of the bended metal strips significantly effects on the FSS performance. Because of the multi-band property, the FSS designed in this paper has a bright prospect in many modern wireless communication systems and even in 5G communication system in the future.
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