Investigation on Frequency and Radius Dependence in Vertical and Horizontal Antenna Alignments of UCA-based OAM Communication

The aim of this paper is to further investigate the communication with Orbital Angular Momentum (OAM) waves between two OAM antenna arrays. The antenna arrays consist of individual dipoles, which together form a Uniform Circular Array (UCA). In this paper, two configurations that have already been discovered are assumed, in which there is no crosstalk between the individual modes. On the one hand, the vertical alignment already examined by many papers and on the other hand a horizontal alignment in which the dipoles have a certain rotation around the axis. The first investigation deals with the frequency dependency in OAM communication in the given setup. In a further investigation, the influence of the radius of the antenna arrays is conducted. The simulations will focus on the transmission of the individual OAM modes and the crosstalk between different OAM modes.