A Spiral Array for OAM Mode Generation

Abstract

This paper presents the generation of various OAM modes using novel spiral array of rectangular patch antennas. The proposed design ceases the requirement of a complex power dividing phased network. The presented OAM antenna is designed to resonate at 5.2 GHz for WLAN applications and can generate OAM beam with topology charge l = 0, ±1. A comparison study of the new OAM design with the conventional Uniform Circular Array (UCA) used for OAM modes generation is also presented.