Figure 3
From: Multiplexed Millimeter Wave Communication with Dual Orbital Angular Momentum (OAM) Mode Antennas
(a) The section view of the slot-loaded resonator and its radiation field. (b) The explosion view of the antenna. It is composed of four parts, including the ring resonator and metal plate, the phase-shift network (90° hybrid coupler), the ring focus parabolic reflector and the flange connectors.
