Three-Dimensional Fully Metallic Dual Polarization Frequency Selective Surface Design Using Coupled-Resonator Circuit Information

TL;DR

This paper introduces a novel fully metallic dual polarization frequency selective surface design using coupled-resonator circuits, enabling precise filtering in desired frequency bands with validated manufacturing and measurement results.

Contribution

It presents a new coupled-resonator circuit approach for designing fully metallic dual polarization FSS with practical manufacturing and experimental validation.

Findings

Good agreement between simulation and measurement results

Effective polarization filtering in targeted frequency bands

Innovative use of coupled-resonator analysis for metallic FSS

Abstract

This work employs a new approach to analyze coupled-resonator circuits to design and manufacture a fully metallic dual polarization frequency selective surface (FSS). The proposed filtering structure is composed of a series of unit cells with resonators fundamentally coupled along the z-direction and then repeated periodically in the xy-plane. The fully metallic cascaded unit cell is rigorously analyzed within an infinite periodic environment as a coupled-resonator electromagnetic (EM) circuit. The convenient design of the EM resonators makes it possible to push the evanescent EM field through the metallic structure in the desired frequency band for both polarizations. An FSS prototype is manufactured and measured, and good agreement is found between the simulation results and the final prototype.