Abstract-Miniaturized monopole and dipole antenna designs are reported with performances optimized for Ultra Wideband pulsed radio applications. The geometries are created using Bézier spline shapes, which have been refined with a genetic algorithm to simultaneously take account of both frequency-and time-domain criteria.Time-domain measurements of ultra wideband antennas with uniformly distributed energy across the full 3.1 -10.6 GHz mask are reported for the first time and validate a new approach to minimization of pulse dispersion effects in the antenna designs.Index Terms-optimization methods, ultra wideband antennas, dipole antennas, time domain measurements.

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Differentially fed UWB slot antenna designs using two optimization approaches are reported. The geometries are created using canonical and Bézier spline shapes. Both were designed for pulse fidelity for the full UWB range while one was refined using genetic algorithm, trust region framework algorithm and square root raised cosine pulse. Time domain performances were measured and compared which demonstrates the efficiency of the optimized approach as well as the capability of the antennas to radiate signals with minimum distortion. Index Terms-Differential ultrawideband antennas, time domain measurements, square root raised cosine, fidelity factor, optimization methods.I.