iiiiiiMiiiiiiiiiiiiiiiiMiiiir 



IIIIIMMIIIIMIIIIIIIIIIIIIII 



METALLIC DELAY LENSES 



3/8" 



METAL STRIP 



NSERTS 



(VIEWED END ON ) 



7i 



lllllllllllllllllllllllllllllllll 

 4 



IIIIIIMIIIIIMIIMIIIMMIMIM 



1 



1 V,6 



ENLARGEMENT OF 

 CENTER SECTION 



REMOVABLE 

 HORN 



Fig. 16— Construction of a six-foot square shielded delay lens for repeater application. 

 The wooden horn has a metal interior surface. 



FOR THE PHASE LENGTH OF 

 RAYS A AND B TO BE EQUAL 



y(f + x)2 + y' 



THE EQUATION OF THE LENS 

 CONTOUR IS A HYPERBOLA. 



-►X 



Fig. 17— Profile equation for a delay lens, 



