DIRECTIVE DIAGRAMS OF ANTENNA ARRAYS 



303 



would, therefore, be the product of the group curve for an infinite 

 number of antennae in the given interval multipUed by a cosine 

 factor for the individual narrow loop. 



Space Characteristics 

 When the antennae are not confined to a straight line but are 

 distributed over an area, a surface with its radius vector propor- 



n = z 

 n = 3 

 n=4 



n=oo 



Fig. 9 — Comparison of finite antl infinite arrays within a total distance of two wave- 

 lengths, with zero phase difference 



