A system for focusing an orbital angular momentum (OAM) multiplexed beam comprising OAM signal processing circuitry for generating an OAM multiplexed signal. The OAM multiplexed signal includes a plurality of data streams each having a unique orbital angular momentum applied thereto and multiplexed together within the OAM multiplexed signal. Each unique orbital angular momentum has a beam helicity value greater than l=2. An antenna array control circuit controls transmission of the multiplexed OAM signal from each of a plurality of antennas in an antenna array toward a focus point located below the ground as a transmission beam to cause the transmitted OAM multiplexed signals to converge at the focus point below the ground at substantially a same time to overcome a divergence of the transmitted plurality of OAM multiplexed signals caused by the beam helicity value of greater than l=2 for each of the unique orbital angular momentum.