Composite Dielectric-Loaded Metallic Metagratings for Dual-Polarized Transmissive Beam Manipulation

Achieving dual-polarized control of electromagnetic waves in transmission remains a key challenge in the design of advanced antenna systems and wireless platforms. Herein, we present a composite architecture of dielectric-loaded perforated metallic metagratings (MGs) and a rigorous analytical framework for their design, enabling efficient transmissive beam manipulation for both transverse electric (TE) and transverse magnetic (TM) polarizations.
Our mode-matching formulation links the structural degrees of freedom — including layer count, perforation geometry, and dielectric loading — to the full set of reflected and transmitted modes, providing an accurate and versatile design tool. This framework handles single- and double-layer configurations with multiple perforations per unit cell, offering a rich design space for polarization- sensitive beam steering.
Leveraging this flexibility, we demonstrate a range of MG designs, from all-metallic single-polarization structures to dielectric-loaded dual-polarized configurations. The designs are validated through full-wave simulations and K-band experiments, confirming the potential of metal-based MGs as durable, high-power beamforming superstrates for environmentally demanding applications.

M.Sc. student under the supervision of Prof. Ariel Epstein.