(19)
(11) EP 0 196 734 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
03.08.1988 Bulletin 1988/31

(43) Date of publication A2:
08.10.1986 Bulletin 1986/41

(21) Application number: 86300149

(22) Date of filing: 10.01.1986
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI LU NL SE

(30) Priority: 31.05.1985 US 740241
28.03.1985 US 717514

(71) Applicant: Satellite Technology Services, Inc.
 ()

(72) Inventors:
  • Rothbarth, James N.
     ()
  • Smith, Edward W.
     ()
  • Rahmat-Samii, Yahya
     ()
  • Imbriale, William Anthony
     ()
  • Galindo, Victor
     ()

   


(54) Cassegrain antenna for TVRO application


(57) An antenna is of the Cassegrain type with a main reflector, subreflector and horn, all circularly symmetric. The horn is corrugated and profiled with the near field focal point of the feed deep within the horn. The main reflector and subreflector are shaped in accordance with the horn pattern to optimize the energy distribution over the aperture of the main reflector. The subreflector, horn, and superstructure of the main reflector may all be of plastic molded construction.







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