Patents by Inventor Joon-Wan Lee

Joon-Wan Lee 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).

  • Handset quadrifilar helical antenna mechanical structures
    Patent number: 7173576
    Abstract: A quadrifilar helical antenna comprising two pairs of filars having unequal lengths and phase quadrature signals propagating thereon. A disk-like impedance matching element disposed at a lower end of the antenna matches a source impedance to an antenna impedance. In certain embodiments a first crossbar connector on a substrate disposed at an upper end of the antenna electrically connects two helical filars to form a first filar pair and a second crossbar connector disposed on the substrate connects two filars to form a second filar pair.
    Type: Grant
    Filed: May 16, 2005
    Date of Patent: February 6, 2007
    Assignee: SkyCross, Inc.
    Inventors: Gregory A. O'Neill, Jr., Young-Min Jo, Paul A. Tornatta, Jr., John Charles Farrar, Murray Fugate, Ki-Chul Kim, Joon-Wan Lee
  • Handset quadrifilar helical antenna mechanical structures
    Publication number: 20060022892
    Abstract: A quadrifilar helical antenna comprising two pairs of filars having unequal lengths and phase quadrature signals propagating thereon. A disk-like impedance matching element disposed at a lower end of the antenna matches a source impedance to an antenna impedance. In certain embodiments a first crossbar connector on a substrate disposed at an upper end of the antenna electrically connects two helical filars to form a first filar pair and a second crossbar connector disposed on the substrate connects two filars to form a second filar pair.
    Type: Application
    Filed: May 16, 2005
    Publication date: February 2, 2006
    Inventors: Gregory O'Neill, Young-Min Jo, Paul Tornatta, John Farrar, Murray Fugate, Ki-Chul Kim, Joon-Wan Lee