Transient Fields of Radiating Structures

A rather simple and general analysis allows calculation of the exact transient near- and far-fields of thin loop antennas, thin linear antennas and apertures directly in the time domain without the knowledge of the time harmonic field. A numerical method (SEM) is used to derive the influence of the antenna radius of linear antennas on the transient near- and far-fields. Application of this tool leads to the transient currents and fields of two coupled parallel identical antennas.