A novel high-selective bandpass frequency selective surface with multiple transmission zeros

Abstract

The design, analysis, and measurement of a novel frequency selective surface (FSS) are proposed, which works with high selectivity in X-band and wide out of band rejection in C-band and Ku-band. The proposed FSS is achieved by cascading two-layer periodic arrays of unit cells based on square loop structure. Multiple transmission zeros are obtained for broadening the stopband on the both sides of the passband. The presented double-layer FSS is insensitive to the variation of incident angle and polarization of a striking plane electromagnetic wave. By studying the electric fields and currents excited in the proposed structure, it explains the passband characteristics and the multiple transmission zeros in the two stopbands. Experimental verifications are carried out, which are consistent with the simulated results.

Additional information

Funding

Funding. This work was supported by Funding of Jiangsu Innovation Program for Graduate Education [grant number CXZZ13_0166]; Youth Funding for Science & Technology Innovation in NUAA [grant number NS2014039]; Open Research Program in Jiangsu Key Laboratory of Meteorological Observation and Information Processing [grant number KDXS1207]; the Chinese Specialized Research Fund for the Doctoral Program of Higher Education [grant number 20123218110017], the Jiangsu Province Science Foundation [grant number BK2011727]; the Foundation of Aeronautical Science [grant number 20121852030]; National Natural Science Foundation [grant number 61307052].