Patents by Inventor Parthasarath Ramanujam

Parthasarath Ramanujam 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).

  • Patent number: 6031506
    Abstract: A method for shaping reflected radio frequency signals includes geometrically shaping a reflector surface of an antenna to focus the beam, and reflectively shaping the reflector surface with phasing elements that emulate geometric shaping to configure the beam to a predetermined shape. In the preferred embodiment, the antenna comprises a geosynchronous satellite antenna conveying signals from a wave guide horn to or from a predetermined geographic area on earth. The use of a parabolic-approaching surface of reflectarray phasing elements for shaping the beam substantially improves the beam pattern bandwidth over the performance of previously known shaped beam reflectarrays.
    Type: Grant
    Filed: July 8, 1997
    Date of Patent: February 29, 2000
    Assignee: Hughes Electronics Corporation
    Inventors: Michael E. Cooley, Thomas J. Chwalek, Parthasarath Ramanujam