Multi-beam antennas are critical components in future terrestrial and non-terrestrial wireless
communications networks. The multiple beams produced by these antennas will enable …

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 …

This communication presents a 3-D-printed wideband parallel-plate circularly polarized
Luneburg lens (LL) antenna. The proposed structure of dielectric posts truncated by two …

A parallel-plate Luneburg lens (LL) based on all-metal metamaterial is presented in this
article. To achieve the required refractive index distribution of the LL, an all-metal unit cell …

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 …

Guidelines are provided for designing multishell Luneburg lenses (LL) whatever the primary
source is. Three different optimization problems that minimize three different norms of the …

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 …

In this paper, we introduce a method to realize 3-D inhomogeneous and nearly isotropic
gradient-index materials in the microwave regime. The unit cells of such gradient-index …

Electromagnetic waves bearing orbital angular momentum in the radio frequency range is a
growing subject of study. The design of systems able to produce and/or to receive such …

This paper presents a novel design of cylindrical modified Luneberg lens antenna at
millimeter-wave (mm-wave) frequencies in which no dielectric is needed as lens material …