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BELL SYSTEM TECHNICAL JOURNAL 



ANTENNA AIRFOIL ASSEMBLY 



Fig. 62— AN/APQ-7 AntennaMounted on B24 ;Bomber. 



CHOKE JOINT 

 COUPLING 



SLIDING 

 SURFACES 



Fig. 63— AN/APQ-7 Antenna. Left- 

 Expanded Wave Guide Assembly. 



-Contracted Wave Guide Assembly. Right — 



The scanning of the beam is accomj)lished by varying the width of the 

 feed waveguide. This is accomplished l)y means of a motor driven actuated 

 cam which drives a push rod extending along the waveguide assembly back 



