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Orientable antenna with conservation of polarization axes

  • US 5,796,370 A
  • Filed: 07/16/1996
  • Issued: 08/18/1998
  • Est. Priority Date: 12/02/1993
  • Status: Expired due to Fees
First Claim
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1. Antenna including at least one reflector and at least one source of electromagnetic radiation, each said at least one source being capable of transmitting and/or receiving radiation in a primary direction which links said at least one source to at least one reflector;

  • each said at least one source including at least one radiating element and means for exciting said element, said antenna being adapted to transmit or to receive a beam of electromagnetic radiation of arbitrary cross-section and in a preferred radiation direction determined by a disposition and an orientation of said reflector and said at least one source, said beam having polarization axes conferred on said beam by the excitation applied to said at least one source, said beam being orientable by movement of one of said antenna and component parts of said antenna, and said antenna further including mechanical means for defining a relative disposition of said reflector and said at least one source and for rotating said reflector about an electromagnetic radiation propagation axis while holding said at least one source in a position such that the polarization axes remain fixed during said reflector rotation, whereinsaid mechanical means comprises depointing means for rotating said reflector about first and second orthogonal axes, said depointing means driving a support which supports an axial rotation motor for rotating said reflector about the electromagnetic radiation propagation axis without also rotating said at least one source.

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