Performance assessment for OAM antenna arrays

Towards the short-range multigigabit data transfer, we investigate the possibility of employing the orbital angular momentum (OAM) of electromagnetic (EM) waves in the unlicensed millimeter wave frequency band around 60 GHz (from 57 GHz to 66 GHz). We investigate the effects of OAM source spatial discretization, with respect to the radial and azimuthal coordinates, on a wireless transmission system performance and the quality of OAM radiation patterns. First, second, and third OAM mode are taken into account. Short-range wireless transmission system capabilities are modeled and estimated for realistic values of input parameters. The estimated data transmission rates are very promising.