Plane wave based near-field far-field transformation with adaptive field translations

Near-field transformation algorithms compute the antenna radiation pattern from a measurement in the radiating near field. The plane wave based near-field transformation algorithm has a low numerical complexity while achieving full probe correction and it is furthermore applicable to arbitrary measurement grids giving a huge flexibility for near-field probing. The transmission equation for a set of measurement points is evaluated in a multilevel fashion and the field translations are now carried out on different levels depending on the distance of the measurement point from the antenna. The adaptive field translations allow to enhance the accuracy of the transformed far-field pattern.