Two possible interpretations of the near-field anomaly in microwave propagation

Microwave propagation experiments, over a short range, demonstrated that the ratio b=c/v of the light velocity c to the observed one v resulted to be less than unity. The various results are here interpreted and compared with the theoretical predictions according to a classical electromagnetic model and to an alternative model based on the assumption of a broken local Lorentz invariance. In any case, the observed superluminal behavior is found to be peculiar to near field.