Radio-transparent dipole antenna based on a metasurface cloak

Jason Soric; Younes Ra'di; Diego Farfan; Andrea Alù

doi:10.1038/s41467-022-28714-w

Radio-transparent dipole antenna based on a metasurface cloak

Nat Commun. 2022 Mar 2;13(1):1114. doi: 10.1038/s41467-022-28714-w.

Authors

Jason Soric^#¹, Younes Ra'di^#², Diego Farfan^{1

2}, Andrea Alù^{3

4

5

6}

Affiliations

¹ Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, TX, 78712, USA.
² Photonics Initiative, Advanced Science Research Center, City University of New York, New York, NY, 10031, USA.
³ Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, TX, 78712, USA. aalu@gc.cuny.edu.
⁴ Photonics Initiative, Advanced Science Research Center, City University of New York, New York, NY, 10031, USA. aalu@gc.cuny.edu.
⁵ Physics Program, Graduate Center, City University of New York, New York, NY, 10016, USA. aalu@gc.cuny.edu.
⁶ Department of Electrical Engineering, City College of The City University of New York, New York, NY, 10031, USA. aalu@gc.cuny.edu.

^# Contributed equally.

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. However, metasurface-based designs have so far shown 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 opens opportunities for cloaking technology, with promising features for crowded wireless communication platforms and noninvasive sensing.