Figure 2
From: Quasioptics for increasing the beam efficiency of wireless power transfer systems
(a) Conical horn antenna schematic where a is the aperture radius, \(L_h\) is the length between the aperture and the center of curvature and \(R_h\) is the horn slant length. (b) Horn far field simulation result. (c) 3D-printed horn antenna. (d) Both horn antennas’ return losses.
