Over the past 5 years, digital coding and programmable metamaterials have been
developed rapidly since their first exhibition in 2014. The iconic feature of the digital coding …

As an alternative to conventional wireless communication techniques that use amplitude,
frequency, and phase modulations, polarization modulation (PoM) provides an additional …

We propose a high-gain transmitting lens antenna by employing layered phase-gradient
metasurface (MS). The MS is engineered to focus the propagating plane wave to a point with …

Metamaterials (MTMs) are artificial structures characterized by flexible and designable
electromagnetic (EM) properties, including permittivity, permeability, and refractive index …

Since 2004, my group at Southeast University has been carrying out research into
microwave metamaterials, which are classified into three catagories: metamaterials based …

In this article, a single-sheet metasurface (MS) for independently manipulating the
transmissive phase and amplitude of linearly polarized electromagnetic (EM) wave is …

An approach of generating broadband Bessel beams is presented. The broadband Bessel
beams are produced by a gradient index (GRIN) metamaterial lens illuminated by …

We present an automated design procedure for the rapid realization of wideband millimeter-
wave lens antennas. The design method is based upon the creation of a library of matched …

In this paper, a systematic method to design a quasi-optimum lens profile based on quasi-
conformal transformation optics technique for a given excitation is presented. This method is …

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 …