Design of an AASS with Angular Selectivity and Switchable Transmission States

DOI: https://doi.org/10.62517/jes.202602216

Author(s)

Jiaying Li*, Xiao Li

Affiliation(s)

School of Information and Navigation, Air Force Engineering University, Xi'an, Shaanxi, China *Corresponding Author

Abstract

This paper proposes an active angle-selective surface (AASS) with angular selectivity and adjustable transmission states. The suggested structure consists of two angle-selective surface (ASS) layers with the same configuration and a transmission-reflection switchable active frequency selective surface (AFSS) layer. The upper ASS layers are employed to obtain angular selectivity by forming a transmission window at a specific incident angle, while effectively reflecting electromagnetic waves at other angles. The lower AFSS layer utilizes PIN diodes to enable the variation of electromagnetic response. Numerical simulation and analysis indicate that, at the operating frequency of 11.75 GHz, the proposed system exhibits notable angular selectivity under TM-polarized incidence, guaranteeing high transmission only at an incident angle of 60° and maintaining strong reflection for other angles. Additionally, the transmission and shielding states can be rapidly changed by adjusting the working conditions of the AFSS when the incident angle is 60°, thus providing dual control over angular selectivity and electromagnetic response. This proposed design provides a promising solution for spatial filtering and directional communication in complex electromagnetic environments, with good potential applications in practical engineering.

Keywords

Active Frequency Selective Surface (AFSS); Angle-Selective Surface (ASS); Reconfigurable Structures; State Switching; Equivalent Circuit Model (ECM)

References

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