Application of time-domain antenna techniques in electromagnetic field sensors characterization

Abstract

Time-domain techniques are advantageous over frequency-domain methods in the transient analysis of wideband systems. A major class of passive electromagnetic field sensors are treated as antennas in the receiving mode and hence can be characterized using antennas time-domain parameters such as effective gain and fidelity. In this paper, these parameters have been calculated for a monopole antenna and an Asymptotic Conical Dipole (ACD). The antennas are modeled as wire structures. By solving a time-domain Electric Field Integral Equation (EFIE) using the method of moments (MoM), the induced current in the wires due to the incident electromagnetic field is determined. Knowing the induced time-domain current and the incident electric field, antenna effective height is calculated as a key parameter to evaluate time-domain characteristics of the sensors.