# Transformation-Optics-Based Design of a Metamaterial Radome for Extending the Scanning Angle of a Phased Array Antenna

## TL;DR

This paper presents a transformation-optics-based method to design a metamaterial radome that extends the scanning angle of phased-array antennas, emphasizing practical implementation and broadband potential.

## Contribution

It introduces a novel transformation-optics approach for radome design that avoids negative or extreme parameters, enabling feasible and broadband metamaterial radomes.

## Key findings

- Design achieves moderate scanning angle extension
- Numerical simulations validate the approach
- Design is robust and potentially broadband

## Abstract

We apply the transformation-optics approach to the design of a metamaterial radome that can extend the scanning angle of a phased-array antenna. For moderate enhancement of the scanning angle, via suitable parameterization and optimization of the coordinate transformation, we obtain a design that admits a technologically viable, robust and potentially broadband implementation in terms of thin-metallic-plate inclusions. Our results, validated via finite-element-based numerical simulations, indicate an alternative route to the design of metamaterial radomes which does not require negative-valued and/or extreme constitutive parameters.