A numerical and experimental study of conical antennas - Application to infrared couplings

The theory of conical antennas is applied to the experimental and numerical study of nonlinear point-contact couplings in the infrared region. Results are presented of experimental measurements of surface current densities on conical point coupling structures using both classical and the modulated scattering techniques to determine the radiation pattern, and of direct measurements of the radiation pattern. The surface current distributions and radiation patterns of conical structures are then investigated numerically based on the solution of the integral equation of the first kind of Albert and Synge (1948) for rotationally symmetric conducting antennas of arbitrary meridian shape in the emission mode, and based on the geometrical theory of diffraction.