Network approach to UWB antenna transfer functions characterization

Transfer functions are useful parameters for UWB antenna characterization. In this paper, the transmitting antenna transfer function, receiving antenna transfer function, and antenna system transfer function are characterized by a network approach. The transfer functions are expressed by ABCD and S parameters when the antenna system is considered as a two-port network. To validate the proposed method, an antipodal Vivaldi antenna is investigated and discussed. The measured results are validated by XFDTD simulation.