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Dual-Polarized Bilayer Angle-Selective Structure
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DOI：10.1109/LAWP.2023.3336866.png)
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Abstract
En 中文
A new concept of 3-D angle-selective structure is proposed in this letter. The 3-D structure has one more longitudinal component than traditional 2-D surfaces, which introduces a new degree of freedom to manipulate the structure's electromagnetic response under different angles of incidence. By stacking two identical layers of this frequency-selective surface with an air gap between them, broadband dual-polarized angular selectivity is achieved. This bilayer structure shows high transmission under the normal incidence and low transmission under the oblique incidence of large angles. Full-wave simulations show that a passband (|S-21| > -1 dB) for incident an angle less than 15(degrees) and a stopband (|S-21| < -15 dB) for an incident angle larger than 50(degrees) are observed at 10.25 GHz for TE-polarized waves. For TM-polarized waves, a passband (|S-21| > -1 dB) for an incident angle less than 10(degrees) and a stopband (|S-21| < -15 dB) for an incident angle larger than 40(degrees) are obtained. A fabricated angle-selective surface (ASS) sample with 26 x 26 unit cells is tested and measured results agree well with simulated results.
Keywords:
Angle-selective surface
dual-polarization
frequency-selective surface
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