On the fidelity of ultra-wideband antennas

Abstract

Within this contribution two ultrawideband antennas, an almost omnidirectional bi-conical antenna of type SBA 9113 from Schwarzbeck and a directional Vivaldi antenna, are analyzed according to their time-domain characteristics. In this context the fidelity factor and the peak value play an important role. Hence both, the parameter's definition is recaped and the particular practical meaning is explained. Moreover, a new parameter, the two antenna fidelity is introduced which indicates an antenna's performance in context of a typical point to point link involving two antennas. To increase the accuracy the analysis is based upon a resimulation of both antennas.