Time, polarization, and wavelength multiplexing schemes have been used to satisfy the
growing need of transmission capacity. Using space as a new dimension for communication …

Metasurfaces offer unprecedented freedom to manipulate electromagnetic waves at deeply
subwavelength scales. However, realizing a highly efficient metasurface, yet simple enough …

Metasurfaces deployed for generating electromagnetic waves that carry orbital angular
momentum (OAM) in the transmission mode are generally inefficient in operation. In this …

Vortex beam, manifesting the characteristic helical phase front and amplitude singularity,
carries inherent orbital angular momentum (OAM) and has received intensive research from …

Orbital angular momentum (OAM) waves with different modes usually perform different
divergence angles, leading to a big challenge and high complexity for signal receiving. To …

Microwave metasurfaces are often difficult to apply in integrated systems due to the required
spatial feeds. Herein, a compact circularly polarized (CP) radiation-type metasurface (RTM) …

In order to improve the channel capacity, waves carrying orbital angular momentum (OAM)
in communication systems have attracted much attention. A two-OAM-mode antenna system …

Recent advances in electromagnetic (EM) waves with helical phase wave-front carrying
orbital angular momentum (OAM) has drawn great attention, since it is believed to be a …

In the last five years or so, there has been a great interest in RF OAM to address the
contradiction between the lack of wireless spectrum resources and the continually growing …

Antenna array is one of the methods which can generate Orbital Angular Momentum (OAM)
waves. However, OAM waves generated by different antenna arrays have different …