Non-redundant representation of electromagnetic fields over a cylinder: an effective source modelling for elongated antennas

By properly using the non-redundant representations of EM fields relevant to source modelling and observation geometries with the same rotational symmetry, an effectively non-redundant sampling technique for the interpolation of the field radiated over a cylinder is developed. Such a technique is especially tailored for cylindrical or elongated sources (conformal arrays, SAR antennas, etc.) and it contains the spherical source as particular case. This is relevant whenever an efficient interpolation of the EM field is wanted and, in particular, in the near-field to far-field transformation with cylindrical scanning.