Work

Inverse Design of Perfectly Matched Metamaterials via Circuit-Based Surrogate Models and the Adjoint Method

Year: 2025

Type: article

Abstract: In this work, perfectly-matched metamaterials (PMMs) are described and combined with inverse design to realize broadband devices. PMMs are discretized metamaterials with anisotropic unit cells selected from a constrained design space, referred to as perfectly-matched media. PMMs exhibit the unique property that all their unit cells are impedance-matched to each other as well as to the host medium in which they are embedded under all excitations. As a result, PMM devices rely on reflectionless refractive effects to achieve a prescribed function. This property enables true time delay performance and promises broadband capabilities. Two design examples are presented to demonstrate the potential of inverse-designed PMMs: a compact, broadband beam-collimator with a prescribed amplitude taper and a multi-input multi-output beamformer exhibiting zero scan loss.

Source: IEEE Transactions on Antennas and Propagation

DOI: 10.1109/tap.2025.3597737

Authors: Shrey Thakkar, Jorge Ruiz-García, Luke Szymanski, Gurkan Gok, Anthony Grbic

Institutions: University of Michigan, MIT Lincoln Laboratory

Language: English

Topic: Metamaterials and Metasurfaces Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funder: Air Force Office of Scientific Research

Award: G6259601642