Patents by Inventor Robert A. Grant

Robert A. Grant 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: 6031505
    Abstract: An RF antenna system is disclosed having at least one meandering antenna line with an aggregate structure formed to substantially extend in two dimensions, to effectively form a top-loaded monopole antenna. The meandering antenna line includes at least one localized bend for providing a compressed effective antenna length in a compact package. The present antenna can be made as an antenna system having discrete transmit and receive antenna lines, so as to form a dual antenna system. The localized bends on each line electromagnetically couple with the respective bends on the other line, thus increasing electromagnetic coupling efficiency, thereby increasing antenna bandwidth and gain.
    Type: Grant
    Filed: June 26, 1998
    Date of Patent: February 29, 2000
    Assignee: Research In Motion Limited
    Inventors: Yihong Qi, Perry Jarmuszewski, Lizhong Zhu, Peter J. Edmonson, Krystyna Bandurska, Robert A. Grant