Patents by Inventor Theodorus H. A. M. Vlek

Theodorus H. A. M. Vlek has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Horn antenna with rotating waveguide and polarization lens means
    Patent number: 4178574
    Abstract: Disclosed is an antenna feed system for use in satellite communication systems and the like, comprising a horn with a rectangular aperture and a waveguide connected thereto. The assembly formed by the waveguide and horn is constructed from two parts secured together so that the junction lies in the longitudinal symmetry plane parallel to the electric field of the TE.sub.01 mode and is mounted for rotation about the longitudinal axis of the waveguide. The feed system further comprises a polarization converter mounted in front of the horn for rotation about the extention of the longitudinal axis of the waveguide. The converter is constructed from a plurality of layers of supporting material each provided with a conductor which forms in one direction a mainly inductive load and in a direction which is perpendicular thereto a mainly capacitive load.
    Type: Grant
    Filed: January 5, 1978
    Date of Patent: December 11, 1979
    Assignee: U.S. Philips Corporation
    Inventors: Jan W. Edens, Theodorus H. A. M. Vlek, Wilhelmus H. C. Withoos