Generation of Orbital Angular Momentum Mode Groups by Partial Arc Array Antenna

Orbital Angular Momentum (OAM), as an important physical quantity that characterizes the spatial structure of electromagnetic waves, has great significance in expanding the channel capacity. Since the OAM beam transmits in a “spiral cone” shape, the longer the transmission distance, the larger the receiving antenna aperture needs. In this paper, we develop a generation method of a quasi OAM beam named OAM mode group (MG) in the form of Partial Arc Transmitting (PAT), successfully generate high mode, high gain OAM-MG and greatly reduce the antenna transmission aperture.