Patents by Inventor Hans H. Viskum

Hans H. Viskum 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).

  • Polarization converter application for accessing linearly polarized satellites with single- or dual-circularly polarized earth station antennas
    Patent number: 5086301
    Abstract: A single- or dual-circularly polarized earth station antenna is converted into a single- or dual-linearly polarized earth station antenna for accessing linearly polarized satellites. In a first embodiment, a free-space meander line polarizer providing a 90.degree. differential phase shift between two orthogonal polarizations is disposed in front of the earth station antenna feed system. In a second embodiment, a power dividing (transmit) or power combining (receive) network operates in conjunction with differential phase shift circuits to achieve the polarization conversion.
    Type: Grant
    Filed: January 10, 1990
    Date of Patent: February 4, 1992
    Assignee: Intelsat
    Inventors: William J. English, Hans H. Viskum