Abstract
In this paper, a bilayer angular selective surface (AGSS) is proposed and designed based on the first odd mode resonance of frequency selective surface (FSS). It can realize angular selective transmission (AST) at non-zero incident angles whereas reflection occurs at other angles. Based on the band pass FSS with square ring slot (SRS) structure, we cascade two uniform SRS structures with air space to form the quarter-wave stack. It can realize AST at 30° or 60° for TE or TM polarization, respectively. In addition, a bilayer FSS with maximum transmission at 30° under TE polarization is fabricated and measured. The measurement result shows good agreement with the simulation one, with -3 dB transmitted angular width of 10° The proposed angular selective surface can be applied in high efficient energy harvesting system and radar system with increased signal-to-noise ratio (SNR) level.
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