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Single Feed Waveguide Antenna with Orbital Angular Momentum Mode

Spatial multiplex transmission with orbital angular momentum (OAM) is being studied as a method for increasing wireless communication capacity. In this paper, we propose a one-point feeding waveguide structure consisting of a circular waveguide and a branch probe that propagates in the TE21 mode to generate the OAM +1 mode. A simulation is performed on the proposed structure, and its characteristics and operating principle are examined and reported.