Multi-Functional Polarization-Based Coverage Control through Static Passive EMSs

TL;DR

This paper introduces a static-passive electromagnetic skin capable of independently manipulating two different polarization states simultaneously, using a single meta-atom arrangement, validated through numerical and experimental tests.

Contribution

It presents a novel design and synthesis method for multi-polarization EMSs that can support multiple wave-manipulation functionalities with a single meta-atom array.

Findings

Successful independent control of polarization components demonstrated

Numerical and experimental validation confirms feasibility

Robustness of the synthesis method shown through tests

Abstract

An innovative multi-functional static-passive electromagnetic skin (SP-EMS) solution is proposed to simultaneously support, in reflection, two independent wave-manipulation functionalities with a single meta-atoms arrangement on the EMS aperture when illuminated by two EM sources operating at the same frequency, but working in different polarization states. Towards this end, a simple reference meta-atom is designed first to enable an accurate and independent control of each polarization component of the local reflection tensor. Successively, the macro-scale synthesis of multi-polarization (MP) SP-EMSs (MP-SP-EMSs) is carried out by solving a global optimization problem where a cost function, which mathematically codes separate requirements for each polarization, is minimized with a customized version of the system-by-design (SbD) technique. Representative results from a set of numerical and experimental tests are reported to assess the feasibility of a multi-function EMS based on polarization diversity as well as the effectiveness and the robustness of the proposed method for the synthesis of MP-SP-EMSs.