Advanced time-domain processing of aperture antenna field

Antenna design for new ultra-wide band (UWB) applications requires us to exploit true time domain (TD) electromagnetic models, not only to quickly achieve a broadband antenna response but also to investigate wavefront propagation and distortion directly in the time domain. In this paper an improved representation of impulsive aperture field is proposed which not only permits us to better represent the effective-height early transient, but also requires a reduced set of data compared with that involved in the previous model. The accuracy and efficiency of the corresponding far field representations is demonstrated by an example.