Frequency-selective Dynamic Scattering Arrays for Over-the-air EM Processing

TL;DR

This paper introduces frequency-selective dynamic scattering arrays (DSAs) that perform joint wave-based computing and radiation, enabling space-frequency superdirective responses with minimal RF chains for advanced MIMO systems.

Contribution

It presents a novel antenna structure capable of transitioning signal processing tasks from digital to electromagnetic domain, enhancing holographic MIMO system capabilities.

Findings

DSAs can produce space-frequency superdirective responses

Minimal RF chains are required for effective operation

Potential applications in future holographic MIMO systems

Abstract

In this paper, we investigate frequency-selective dynamic scattering array (DSA), a versatile antenna structure capable of performing joint wave-based computing and radiation by transitioning signal processing tasks from the digital domain to the electromagnetic (EM) domain. The numerical results demonstrate the potential of DSAs to produce space-frequency superdirective responses with minimal usage of radiofrequency (RF) chains, making it particularly attractive for future holographic multiple-input multiple-output (MIMO) systems.