Design and characterization of half Maxwell fish-eye lens antennas in millimeter waves

Metamaterials-based gradient index broadband lens antennas

“…In 2006, Fuchs et al [10] proposed to use only half of the MFE lens referred to as the half Maxwell fish-eye (HMFE) so as to transform a point source into a plane wave and therefore to produce a highly directive beam. Experimental validation of these lenses was generally based on the use of horn antennas or coaxial to waveguide transitions as sources, causing an increase in the profile and making in board integration of such devices very difficult.…”

Reconfigurable Radiation Pattern Antennas in mm-Waves

“…The dielectric constant inside the lens ranges between 1 (r = 1) and 4 (r = 0). To approximate the continuous gradient index law, several concentric homogeneous dielectric shells are assembled and their characteristics have been optimized (Fuchs et al, 2006), . The radius and dielectric constant of shells are chosen to optimize the directivity when the lens is fed by only one source (Fig.19).…”

Electromagnetic modeling of stratified inhomogeneous lenses fed by real sources

“…Up to now, this technique has been successfully applied to analyze spherically stratified lenses associated with theoretically defined sources namely multishell Luneburg lens antennas [1,2]. This efficient method is here reviewed and adapted in order to be able to handle both the scattering by hemispherically stratified lenses, such as multishell half Maxwell fish-eye lens antennas [3], and to take into account any real sources.…”