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Plural horns at focus of parabolic reflector with shields to reduce spillover and side lobes

  • US 3,176,301 A
  • Filed: 02/14/1963
  • Issued: 03/30/1965
  • Est. Priority Date: 02/14/1963
  • Status: Expired due to Term
First Claim
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1. A SHIELDING ARRANGEMENT FOR MINIMIZING THE SPILLOVER LOBES OF AN ANTENNA SYSTEM HAVING A GENERALLY PARABOLIC REFLECTOR AND A PLURALITY OF FEED HORNS DISPOSED IN THE FOCAL PLANE OF SAID REFLECTOR WHICH COMPRISES:

  • (A) A METALLIC SHIELD COEXTENSIVE WITH THE EDGE OF SAID REFLECTOR AND EXTENDING THEREFROM IN THE DIRECTION OF THE AXIS OF SAID REFLECTOR TOWARD SAID FOCAL PLANE, (B) A SECOND CYLINDRICAL SHIELD COAXIAL WITH SAID AXIS EXTENDING FROM SAID FOCAL PLANE TOWARD SAID REFELCTOR AND ENCLOSING SAID FEED HORNS, (C) SAID SECOND SHIELD HAVING A DIAMETER AND LENGTH PROPORTIONED SO AS TO PERMIT ILLUMINATION OF THE ENTIRE REFLECTOR SURFACE BY SAID HORNS.

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