Multi-Scale Single-Bit RP-EMS Synthesis for Advanced Propagation Manipulation through System-by-Design

TL;DR

This paper introduces a novel multi-scale synthesis method for single-bit reconfigurable electromagnetic skins, enabling advanced beam shaping and wave manipulation through a two-phase process involving macro-scale current synthesis and meta-atom optimization.

Contribution

It proposes a new two-phase synthesis approach combining quantized iterative projection and System-by-Design for controlling single-bit EM skins.

Findings

Effective design of single-bit meta-atom RP-EMSs demonstrated

Enables complex wave manipulations with simplified control

Numerical results validate the approach's effectiveness

Abstract

A new method for synthesizing Single-Bit Reconfigurable Passive Electromagnetic Skins (1RP-EMSs) featuring advanced beam shaping capabilities is proposed. By using single-bit unit cells, the multi-scale problem of controlling 1RP-EMSs is formulated as a two-phase process. First, the macro-scale synthesis of the discrete surface current that radiates the electromagnetic (EM) field fitting user-designed requirements is performed by means of an innovative quantized version of the iterative projection method (QIPM). Successively, the meta-atom states of the 1RP-EMS are optimized with a customized implementation of the System-by-Design paradigm to yield a 1RP-EMS that supports such a feasible reference current. A representative set of numerical results is reported to assess the effectiveness of the proposed approach in designing and controlling single-bit meta-atom RP-EMSs that enable complex wave manipulations.