Transient analysis of the Yagi-Uda antenna on a house illuminated by a high-power electromagnetic pulse (HPEMP)

A modified time-domain method, based on FDTD (2, 4) combined with thin wire model and high-order area average dielectric conformal technique, is proposed to analyze the transient current response of a Yagi-Uda Antenna. The antenna is placed on the rooftop of the house. Some numerical results are presented to show the accuracies of linear and area average techniques. Good agreements are obtained with some reference results, even with coarse meshes adopted for handling electrically large or complex objects. Further, using our proposed hybrid technique, the transient current responses of Yagi-Uda antenna, illuminated by electromagnetic pulses with different rise time and pulse widths, are captured and examined in detail.