Patents Assigned to 501 Pronav International, Inc.
  • Personal positioning satellite navigator with printed quadrifilar helical antenna
    Patent number: 5198831
    Abstract: A navigation unit (10) for receiving navigation signals from a source thereof such as global positioning satellites is configured to rack mount and connect with a remote fixed antenna and for detached, self-powered operation using a directly mounted helical antenna (14). The preferred antenna (14) includes antenna elements composed of a thin film of conductive material (50) printed on a flexible dielectric substrate (44) rolled into a tubular configuration.
    Type: Grant
    Filed: September 26, 1990
    Date of Patent: March 30, 1993
    Assignee: 501 Pronav International, Inc.
    Inventors: Gary L. Burrell, Min H. Kao, Paul K. Shumaker