On the fidelity of ultra-wideband antennas

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.