Link-Budget Estimations for Uniform Circular Antenna Arrays with Orbital Angular Momentum

We analyze wireless communication links at 10 GHz with two antennas (patch arrays) that utilize waves carrying orbital angular momentum (OAM). The focus of this study is on uniform-circular-array (UCA) antennas at short distances. Considering communication links where a receiving UCA is optimized to produce the maximal link budget (LB) at the given distance, we analyze the characteristics of LBs estimated using analytical expressions and electromagnetic simulations.