Xiaofeng Jin

TL;DR: The system model based on OAM-MDM is mathematically analyzed and it is theoretically concluded that such system architecture can bring a vast reduction in receiver complexity without capacity penalty compared with conventional line-of-sight multiple-in-multiple-out systems under the same physical constraint.

TL;DR: Experimental results show that this antenna can radiate two coaxially propagating OAM modes beams simultaneously, and the multiplexing and de-multiplexing are easily realized in the antennas themselves.

TL;DR: In this paper, an ultralow reflectivity spiral phase plate (SPP) is proposed to generate an orbital angular momentum (OAM) beam at millimeter-wave frequency, which is composed of unit cells whose equivalent permittivity and thickness are designed to satisfy the impedance matching condition based on transmission line theory.

TL;DR: In this article, a traveling-wave circular loop antenna with its phase distribution along the circle of a circle is demonstrated to generate the twisted radio wave, and theoretical formulations of its radiation fields are deduced in the cylindrical coordinate system and used to analyze its transmission characteristics.

TL;DR: In this article, the authors reported a highly tunable graphene embedded waveguide which overall modal index is in linear relationship with the in-plane permittivity of graphene and the electro-refraction effect has been significantly enhanced after graphene is embedded.