514 



BELL SYSTEM TECHNICAL JOURNAL 



> 



-2.0 -1.8 -1.6 -1.4 -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0.2 0.4 0.6 



n' n ., 



-1.0 -0.8 -0.6 -0.4 -0.2 



0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 



JV n 

 N ~ N 



I 



-d^ 



t: 



CASE I 



CASE 

 \ I 



SCANNING PITCH : 



2b 



^2b d 



SCANNING PITCH = ^ = "g" 



X^ 



^ 



02 0.4 0.6 0.6 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 



_n_ 



N 



Fig. 28 — Rectangular aperture with different degrees of overlap. 



