Patents by Inventor Richard William Stewart

Richard William Stewart 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).

  • Apparatus and method for impedance control
    Patent number: 6577155
    Abstract: Controlling the common mode impedance for a circuit, conductor, or multiple conductor cable by incorporating the circuit or conductor into the primary of a transformer. The secondary of the transformer is coupled to a secondary impedance selected so that the desired impedance is obtained. A capacitive shunt may be added to buffer the intrinsic primary impedance. The intrinsic impedance of a conductive antenna structure is controlled by deploying a portion of the antenna structure as the primary of a transformer and coupling the secondary of the transformer to a selectable secondary impedance.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: June 10, 2003
    Assignee: Fischer Custom Communications, Inc.
    Inventors: Richard William Stewart, Bruce L. Harlacher
  • Apparatus and method for impedance control
    Publication number: 20030020559
    Abstract: Controlling the common mode impedance for a circuit, conductor, or multiple conductor cable by incorporating the circuit or conductor into the primary of a transformer. The secondary of the transformer is coupled to a secondary impedance selected so that the desired impedance is obtained. A capacitive shunt may be added to buffer the intrinsic primary impedance. The intrinsic impedance of a conductive antenna structure is controlled by deploying a portion of the antenna structure as the primary of a transformer and coupling the secondary of the transformer to a selectable secondary impedance.
    Type: Application
    Filed: July 30, 2001
    Publication date: January 30, 2003
    Inventors: Richard William Stewart, Bruce L. Harlacher