Structured optical materials create new computing paradigms using photons, with
transformative impact on various fields, including machine learning, computer vision …

Gradient index lens antennas find their application in modern wireless communication
including radar systems, satellite communication, etc. They can ensure highly directional …

We introduce a novel formulation for flat radial GRadient INdex (GRIN) lenses allowing for
the optimal lens design through closed-form expressions. The validity of the proposed …

This manuscript presents a lens antenna with simultaneous broadside and conical beams.
The lens is designed for the Ku band using the ray inserting method. The proposed conical …

A lens antenna (LA) with the characteristics of ultrawide band and high aperture efficiency is
proposed in this letter. Moreover, the proposed lens is automatically designed by the genetic …

In this paper, a novel three-dimensional (3-D) generalized hyperbolic secant (HS) lens is
first introduced using perforated dielectric material. The attractiveness of this new lens is its …

We propose a general method for designing wideband matching tapers in inhomogeneous
media where phase velocity is coupled to the taper impedance profile. Such tapers are used …

This work presents a parallel-plate waveguide (PPWG) fanbeam antenna achieving a field
of view with an average maximum scan loss of over the Ka-band for a flat feed surface. This …

A novel planar dielectric polarizer made of a low-profile high-dielectric-constant material is
proposed. Two anisotropic antireflection layers are used on both sides to provide …

A novel very efficient algorithm based on geometrical optics (GO) is presented for the
analysis of graded index (GRIN) lens antennas, namely, dielectric inhomogeneous lenses …