42 



BELL SYSTEM TECHNICAL JOURNAL 



n 



ilM ®|P-^P^ 



UPPER 

 PARABOLA 



UPPER 



PARABOLA- 



^ 



M 



TRANSMISSION LINE 

 TO MAIN UNIT 



® 



LZr-i LOBE 



:^^— I ^SWITCHING" 

 VpJ r MECHANISM 



Hy_P- CONTACTS 

 'ixAPACITOR 



'tA) LOWER 

 ^ PARABOLA 



LOWER 

 ^-v PARABOLA 



(At MATCHING SECTION 



Fig. 34 — Mark 4 — Antenna schematic 



Fig. 35 — Mark 4 antenna un Battleship Tennessee (Navy Photo lU()o-4. 



