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BELL SYSTEM TECHNICAL JOURNAL 



repeat cyclically with increasing phase difference. These curves 

 were copied from the original drawing; detailed accuracy is not claimed, 

 hut the arrangement and relative sizes of the lobes are appioximately 

 correct. 



Comparison of Figs. 1 and 5 shows that, for the same set of para- 

 meters, the main features of the two diagrams are similar, that is, 



Fig. 7 — ^Cumulative amplitude diagrams for sixteen antennae 



the main lobes are located in the same positions, but with 16 antennae 

 the main lobes are much narrower and in addition a multiplicity of 

 small lobes occurs in many cases. 



The area of the directive diagrams for 16 antennae oscillates about 

 1/16 and approaches it as a limit upon increasing the separation, 

 keeping the phase diliference constant. The minimum area (for a 

 diagram in which the radius vector reaches its maximum of un-ty) 

 is 0.0254, obtained by the array (0.S825X, OF). The directive diagram 

 for this case is shown by Fig. 6. Cumulative amplitude diagrams for 

 16 antennae are shown by Fig. 7 for three selected arrays in addition 

 to the array (OX, Or), the area of each diagram being given on the 

 drawing. 



