A Near-Field Compatible Model for 2D Waveguide-Fed Metasurfaces

TL;DR

This paper introduces a new analytical model for 2D waveguide-fed metasurface antennas that accurately predicts near-field behavior, validated by simulations, and extends previous models with closed-form expressions.

Contribution

The paper develops a physically consistent, near-field compatible analytical model for 2D waveguide-fed metasurfaces based on the discrete dipole approximation.

Findings

Model validated through full-wave simulations.

Provides closed-form expressions for effective polarizabilities.

Accurately predicts near-field behavior of metasurfaces.

Abstract

This paper presents a novel physically consistent analytical model for two-dimensional (2D) waveguide-fed metasurface antennas that is based on the discrete dipole approximation. The proposed framework extends previous works deriving power-consistent constraints on the magnetic polarizability tensor, leading to closed-form expressions for the effective polarizabilities. The model is validated through full-wave simulations for multi-feed settings, and is extended to a near-field compatible~formulation enabling accurate predictions in the radiating near-field.