David R. Smith

TL;DR: In this paper, an artificial dielectric gradient index lens was designed to operate at millimeter-wave frequencies using finite element simulations in conjunction with material parameter retrieval techniques to design an artificial unit cell with an optimum refractive index range.

TL;DR: It is found that fabricating the planar GRIN lenses from a uniaxial medium has the potential to improve the performance of the lenses.

TL;DR: In this paper, a four column smart antenna array fed by a 4x4 Butler matrix augmented by a variable beam shaping network has been designed and simulated, and it is demonstrated that using only three phase shifters within the beam-forming network provides dynamic beam flexibility including: four narrow switched beams, a right shaped beam, a left shaped beam and a broad broadcast channel beam.

TL;DR: In this paper, a lateral beam shift is demonstrated both theoretically and in microwave experiments when total internal reflection takes place at the boundary of a self-collimating two-dimensional photonic crystal consisting of an array of high index dielectric cylinders.