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Antenna system having azimuth rotating directive beam with selectable polarization

  • US 4,939,526 A
  • Filed: 12/22/1988
  • Issued: 07/03/1990
  • Est. Priority Date: 12/22/1988
  • Status: Expired due to Fees
First Claim
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1. A scanning antenna system for processing linearly polarized signals, the system providing a beam scannable through a predetermined scan angle, the system comprising:

  • reflector means rotatable about an axis for scanning the beam, for forming the beam, for reflecting energy of the beam and for reflecting energy along the axis, and comprising a first circular polarizer for polarizing the energy processed by the reflector means;

    a fixed feed which is non-rotating about the axis and which has a first port disposed along the axis and fixed in position in relation thereto for feeding circularly polarized energy along the axis between its first port and the reflector means, and having a second port through which linearly polarized energy is fed; and

    a second circular polarizer disposed in the fixed feed for polarizing the energy traversing the first and second ports of the fixed feed, the second circular polarizer having the same sense of polarization as the first circular polarizer.

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