Microwave orbital angular momentum mode multiplexing using circular slot antenna

In this paper, a space-saving and cost-efficient slot antenna system, which can generate l=+1 and l=-1 OAM waves simultaneously at 2.4 GHz, is proposed. Simulation results demonstrate that the multiplexing antenna system can generate dual-mode OAM waves. Isolation coefficients between different OAM modes achieve -16dB, which provides a better approach for exploiting OAM waves in wireless communication field.