# Scattering of Electromagnetic Waves Incident Normally on Square Patch-Type FSS Placed at the Interface between Two Dielectric Media

## TL;DR

This paper presents an analytical method to calculate how electromagnetic waves scatter when they hit a square patch FSS at the boundary between two dielectric media, providing accurate reflection and transmission estimates.

## Contribution

It introduces a new analytical approach for computing scattering matrix elements for square patch FSS at dielectric interfaces, enhancing practical accuracy.

## Key findings

- Analytical expressions for reflection and transmission coefficients are derived.
- The method achieves sufficient accuracy for practical applications.
- The approach simplifies the analysis of FSS at dielectric interfaces.

## Abstract

In this paper an analytical approach for calculating scattering matrix elements for the case of normal incidence of the plane electromagnetic waves on the square patch-type Frequency Selective Surface (FSS), which is placed at the interface between two dielectric media is proposed. Analytical expressions for the reflection and transmission coefficients are shown to be accurate enough for practical purposes.