Arrival time of the front-edge in microwave propagation experiments

The computation of the incoming wave-amplitude is reexamined even in relation to e.m. anomalous propagation. Specifically, we analyze the case in which a pole singularity is quite close to the instant of the beginning of the signal, and in which the contribution of the saddle-point, although appreciable, becomes less important. Along these lines, the experimental results can be well explained. Some results on electromagnetic propagation in the range of microwaves are reported and interpreted.