Characterization UWB of wire antennas in the space-time domain

In this work, an approach based on the Singularities Expansion Method (SEM) is employed for the characterization Ultra-Wide Band (UWB) of wire antennas through a semi-analytical representation of an effective height operator. The antenna natural resonances (singularities) employed for determining that operator are obtained directly in the time domain using the Matrix Pencil method over the antenna impulsional induced currents, which are calculated by a computer code based on Time-Domain Electric Field Integral Equation (TD-EFIE). The effective height is used in the calculation of important parameters associated with UWB antennas, such as the time-independent radiation pattern and energy diagram, allowing a unified characterization in the temporal and spectral domains. Case studies involving the characterization of an antenna composed of wires are provided to demonstrate the applicability of the method developed herein.