208 



BELL SYSTEM TECHNICAL JOURNAL 



CONDUCTING 

 ^/SPHERES 



INSULATED 

 ■^-^^^ SUPPORTING RODS 



FEED 



Fig. III-6.— Schematic of metallic delay lens using metal balls as the delay elements. 



METAL STRIP INSERTS 



Illl!lllllllllllllllllllllllll4'_^" ^^"""'^ '^^ °^^ 



IIIIIIIIIIIIIIIIINIINIIMIII 



lllllllllllllllllllllllllllllllll 

 jllllllllllllllllllllllllllllllll 



31 



ENLARGEMENT OF CENTER SECTION 



7-CENTIMETER 

 WAVEGUIDE -. 



REMOVABLE —- 

 HORN 



Fig. III-7.— Schematic of metallic delay lens for repeater applications using metal 

 strips as the delay elements. 



