Metamaterials are artificial structures with the ability of exhibiting unusual and exotic
electromagnetic properties such as the realisation of negative permittivity and permeability …

Autonomous vehicles (AV) are rapidly becoming integrated into everyday life, with several
countries anticipating their inclusion in public transport networks in the coming years. Safety …

A 3-D-printed Luneburg lens with a novel simplified geometry is presented. The rod-type
structures are employed as the unit cell of the gradient-index material to realize the required …

We present a broadband metasurface Luneburg lens for full-angle operation. The design of
the Luneburg lens is based on an inverted substrate parallel-plate-waveguide structure with …

This paper presents a Luneburg lens and a Luneburg reflector lens along with the
corresponding compact and cost-effective multibeam antennas in the Ka-band. The …

Quasi-optical beamformers provide attractive properties for antenna applications at
millimeter-wave (mm-wave) frequencies. Antennas implemented with these beamformers …

This article presents a multibeam dual circularly polarized (CP) Luneburg lens (LL) antenna
based on quasi-icosahedron (QICO) models. The lens is sliced into multiple shells and each …

A three-dimensional (3D) printed Luneburg lens with nearly isotropic properties is
presented. The cubical-lattice-type and the rod-type gradient-index materials are employed …

Multibeam and beam-scanning capabilities of metasurface (MTS) antennas using multiple
feeds are investigated. The MTS synthesis is performed by direct inversion of an electric field …

A simple and low-cost single substrate layer Luneburg lens-based beamforming network
(BFN) operating in W-band is proposed. A multibeam antenna is then realized using the …