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

With the advent of 5G and future trends for communication systems moving to millimeter
wave (MMW) and higher frequencies, antennas will be required to have high gain, wide …

Based on a transformation optics method, a flat compact dual-polarized Luneburg lens
antenna is proposed and implemented using the printed-circuit-board-stacked gradient …

Metamaterials are mostly designed in the time-harmonic scenario where wave propagation
can be spatially manipulated. Tailoring the electromagnetic response of media in time has …

The great flexibility offered by transformation optics for controlling electromagnetic radiation
by virtually re-sha** the electromagnetic space has inspired a myriad of dream-tailored …

Acoustic Luneburg lens (ALL) is a spherically/circularly symmetric gradient refractive index
lens, whose index varies smoothly from the outer surface to the centre. The variation of the …

In the last decade, a technique termed transformation optics has been developed for the
design of novel electromagnetic devices. This method defines the exact modification of …

A transformation-optics map** that radially compresses a sphere into a cylindrical slab
with an arbitrary ratio of D/t is proposed to design a flat and thin dual-polarized Luneburg …

The transformation optics (TO) technique has been widely applied in the volume reduction of
Luneburg lens (LL) in both optical and microwave regimes. However, it is found that the …

This letter presents a method to realize anisotropic two-dimensional designs with wideband
operation. Glide symmetry has been proven to increase the bandwidth and equivalent …