V.4 No 1

35

Study of dynamic scalar potential

Since we are interesting to find namely the variation of velocity of the wave propagation in the near field, we can transform (45) to the parameters of our interest, applying the standard transformation

where c'  is the measured velocity of EM wave propagation along the normal to the dipole axis; c  is the real velocity of wave propagation from the pulsing charge of dipole; f  is the frequency of dipole radiation.

Thus, given (47), the expression (45) takes the following form:

The plot of relationship  c'()  is shown in Fig. 22.

Fig. 22. Plot of relationship of EM wave propagation velocity in the near field with respect to the distance from the dipole centre

This regularity evidences that in the near field the wave propagation velocity grows with the decreasing distance to the dipole centre. The shown variation of velocity is caused not by the change of characteristics of the near-dipole space but only by the conditions of superposition of dipole charges. The propagation velocity varies just because at the near distance from dipole, there reveals the affection of geometry of the field, as well as because the resulting wave does propagate from the centre of dipole.

The experimental results presented in [16] also show the velocity growing in the near field, though the velocity there depends on distance in much more complicated form. It first falls, passes through some minimum and only then begins growing asymptotically in approaching to the dipole axis.

The cause of this difference is that the studied phenomenon is multi-factorial, and affection of dipole charges shift is only one of factors.