Cross-polarization Control in FSSs by means of an Equivalent Circuit Approach

Abstract

This paper presents an efficient equivalent circuit approach (ECA), based on a Floquet modal expansion, for the study of the co- and cross-polarization in frequency selective surfaces (FSS) formed by periodic arrays of patches/apertures in either single or stacked configurations. The ECA makes it possible the derivation of analytical expressions for the generalized scattering parameters associated with the proposed circuit networks. Furthermore, the proposed circuit approach is an efficient surrogate model that can be combined with optimization techniques and artificial intelligence algorithms for the efficient design of FSS structures, saving efforts in the computation compared to time-consuming full-wave simulators and tedious synthesis (simulation-assisted) techniques. Due to the simplicity of the topology of the involved networks, the ECA can also be advantageously used to gain physical insight. The proposed approach is applied and validated in different FSS configurations where the cross-pol component plays a fundamental role in the design, as in circular polarizers, polarization rotators, and reflectarray cells.

Published in IEEE Access

References in corpus (4)

• A Design Technique based on Equivalent Circuit and Coupler Theory for Broadband Linear to Circular Polarization Converters in Reflection or Transmission Mode
• A Simple Equivalent Circuit Approach for Anisotropic Frequency Selective Surfaces and Metasurfaces
• Exploring the Potentials of the Multi-modal Equivalent Circuit Approach for Stacks of 2-D Aperture Arrays
• Bimode Fosters Equivalent Circuit of Arbitrary Planar Periodic Structures and Its Application to Design Polarization Controller Devices

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• Diffraction Phenomena in Time-varying Metal-based Metasurfaces
• Space-time Metallic Metasurfaces for Frequency Conversion and Beamforming
• Analysis of Metallic Space-Time Gratings using Lorentz Transformations
• Analytical Equivalent Circuits for Three-dimensional Metamaterials and Metagratings