SELECTIVE FADING OF SUPER-HIGH FREQUENCY SIGNALS 1195 



a2 



99.8 



12 16 20 24 28 32 



DIFFERENCE IN PATH LOSS IN DECIBELS 



Fig. 5 — Statistical distribution of differences between maximum and minimum 

 path loss in bands 400 mc wide. (Center frequency of 400-mc band random with 

 respect to frequencies corresponding to maxima and minima of path loss) . 



4. It seemed to be the rule that components with relatively long delays 

 were appreciably smaller in magnitude than those with shorter delays. 



5. At the bottom of the deep fades some of the small signal com- 

 ponents with relatively long delays were an important factor in deter- 

 mining the shape of the path-loss versus frequency curves. 



Fig. 5 illustrates one type of statistical information which was derived 

 from the 1,800 individual path-loss versus frequency curves. The family 

 of curves on Fig. 5 shows the per cent of fades (of a given depth) which 



