TEM horn optimized for transient radiation

Theory and measurements are presented to show that careful shaping of anten na metalization can be used to design TEM ham antennas for ultra-wideband a pplications involving high-fidelity impulsive electromagnetic fields. The e ffect on the radiated pulse, spectral bandwidth, and transfer function is d iscussed. A numerical time-domain formation is described to compute the imp ulsive radiated far-field,waveform, and some experimentnl results are inclu ded to indicate the usefulness of the technique. The ringing action of the antenna is recognized as the crucial parameter constraining the usefulness of the design. (C) 2001 John Wiley & Sons, Inc.