Radio-Transparent Dipole Antenna Based on a Metasurface Cloak

TL;DR

This paper presents a novel radio-transparent dipole antenna design using a metasurface cloak that reduces scattering, minimizes footprint, and enhances bandwidth, offering advantages for crowded wireless environments and sensing applications.

Contribution

The study introduces a metasurface cloak that acts as the radiating element, significantly improving scattering suppression and bandwidth while reducing antenna size compared to traditional designs.

Findings

Reduced antenna scattering in crowded environments

Enhanced bandwidth and reduced footprint

Comparable radiation efficiency to conventional antennas

Abstract

Antenna technology is at the basis of ubiquitous wireless communication systems and sensors. Radiation is typically sustained by conduction currents flowing around resonant metallic objects that are optimized to enhance efficiency and bandwidth. However, resonant conductors are prone to large scattering of impinging waves, leading to challenges in crowded antenna environments due to blockage and distortion. Metasurface cloaks have been explored in the quest of addressing this challenge by reducing antenna scattering, but with limited performance in terms of bandwidth, footprint and overall scattering reduction. Here we introduce a different route towards radio-transparent antennas, in which the cloak itself acts as the radiating element, drastically reducing the overall footprint while enhancing scattering suppression and bandwidth, without sacrificing other relevant radiation metrics compared to conventional antennas. This technique offers a new application of cloaking technology, with promising features for crowded wireless communication platforms and noninvasive sensing.