Near-field focusing employing sinusoidally modulated reactance surfaces

I. Iliopoulos (1) , M. Esquius-Morote (2) , J.R. Mosig (2) , M. García-Vigueras (1)

1 IETR - Institut d'Électronique et des Technologies du numéRique
2 EPFL - Ecole Polytechnique Fédérale de Lausanne

This work aims at showing the feasibility of performing 2D near-field focusing using a Leaky-Wave Lens (LWL) based on Sinusoidally Modulated Reactance Surfaces (SMRS). The polarization of the field at the focus is perpendicular to the antenna aperture, due to the geometry of the structure. Electrically small focal distances are achieved, combined with very small spot diameters. The limitations of this approach are discussed, which are mainly related to the prediction of the focal point. The concept is proven by simulations and experimental testing is in progress. © 2016 European Association of Antennas and Propagation.

Keywords: Antennas; Antenna aperture; Experimental testing; Focal distances; Focal points; Leaky wave antennas; Leaky waves; Metasurfaces; Near-field focusing; Traveling wave antennas

Domains: Computer Science [cs]; Networking and Internet Architecture [cs.NI]; Engineering Sciences [physics]; Electronics

I. Iliopoulos, M. Esquius-Morote, J.R. Mosig, M. García-Vigueras. Near-field focusing employing sinusoidally modulated reactance surfaces. 10th European Conference on Antennas and Propagation, EuCAP 2016, Apr 2016, Davos, Switzerland. pp.7481590, ⟨10.1109/EuCAP.2016.7481590⟩. ⟨hal-01368140⟩