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

Electromagnetic (EM) vortex can realize high resolution imaging in forward-looking
observation geometry without relative motion between the radar system and targets …

This article presents an efficient synthesis method for generating vortex beams based on
donut-shaped orbital angular momentum (OAM) metasurfaces. It not only allows one to …

Vortex beams carrying orbital angular momentum (OAM) are widely applied in various
electromagnetic, optical, and quantum systems. A tailored OAM spectrum composed of …

In this letter, a low-profile wideband pattern diversity antenna based on metasurface (MTS)
is proposed. Initially, based on the theory of characteristic mode (TCM), the two adjacent …

In this letter, a 2× 2 wideband bidirectional dual circularly polarized (CP) orbital angular
momentum (OAM) antenna array at millimeter-wave frequency is presented, which can be …

In this letter, a high-gain dual-mode orbital angular momentum (OAM) antenna array with a
simplified feeding network based on polarization rotating metasurface is presented. To …

It becomes more and more challenging to satisfy the long-term demand of transmission
capacity in wireless networks if we limit our research within the frame of traditional …

An equivalent fractional order orbital angular momentum (OAM) mode based on concentric
uniform circular array (CUCA) is proposed in this paper. It is known that the azimuthal …

The vortex electromagnetic (EM) wave carrying orbital angular momentum (OAM) has been
introduced in radar imaging to take full advantage of its special phase front. It has been …