Holographic Smart EM Skins for Advanced Beam Power Shaping in Next Generation Wireless Environments

TL;DR

This paper introduces a novel, cost-effective holographic smart EM skin design that enables advanced beamforming for next-generation wireless systems, utilizing a multiscale approach within the GSTC framework.

Contribution

It presents a new synthesis method combining inverse source problems and susceptibility optimization for smart skins with enhanced beam shaping capabilities.

Findings

Effective beam power shaping demonstrated in test cases

Cost-effective design approach validated

High performance in diverse aperture configurations

Abstract

An innovative approach for the synthesis of inexpensive holographic smart electromagnetic (EM) skins with advanced beamforming features is proposed. The complex multiscale smart skin design is formulated within the Generalized Sheet Transition Condition (GSTC) framework as a combination of a mask-constrained isophoric inverse source problem and a micro-scale susceptibility dyadic optimization. The solution strategy integrates a local search procedure based on the iterative projection technique (IPT) and a System-by-Design (SbD)-based optimization loop for the identification of optimal metasurface descriptors matching the desired surface currents. The performance and the efficiency of the proposed approach are assessed in a set of representative test cases concerned with different smart skin apertures and target pattern masks.