ANOMALOUS PULSE DELAY IN MICROWAVE PROPAGATION - A CASE OF SUPERLUMINAL BEHAVIOR

Delay time measuremont of microwave pulses, in open air propagation, h ave been repeated by using horn antennas in the near-field region at d ifferent frequencies. The delay decreases when the receiver is shifted or tilted vith respect to rbe launcher showing superluminal behavior which disappears for distances beyond the near-field limit. These resu lts are interpreted by a model where complex waves-a special kind of d ecaying wave-are dominant.