Patents by Inventor Charles Stuart Robertson, III

Charles Stuart Robertson, III 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).

  • Polar envelope correction mechanism for enhancing linearity of RF/microwave power amplifier
    Patent number: 5742201
    Abstract: Linearity of an RF/microwave power amplifier is enhanced by an amplitude and phase distortion correction mechanism based upon signal envelope feedback, that operates directly on the RF signal passing through the power amplifier. A phase-amplitude controller responds to changes in gain and phase through the RF/microwave power amplifier signal path caused by changes in RF input power, DC power supply voltages, time, temperature and other variables, and controls the operation of a gain and phase adjustment circuit, so as to maintain constant gain and transmission phase through the RF/microwave power amplifier.
    Type: Grant
    Filed: January 30, 1996
    Date of Patent: April 21, 1998
    Assignee: Spectrian
    Inventors: John A. Eisenberg, Brian L. Baskin, Charles Stuart Robertson, III, Dieter Werner Statezni, Lance Todd Mucenieks, David Lee Brubaker
  • Polar envelope correction mechanism for enhancing linearity of RF/microwave power amplifier
    Patent number: RE37407
    Abstract: Linearity of an RF/microwave power amplifier is enhanced by an amplitude and phase distortion correction mechanism based upon signal envelope feedback, that operates directly on the RF signal passing through the power amplifier. A phase-amplitude controller responds to changes in gain and phase through the RF/microwave power amplifier signal path caused by changes in RF input power, DC power supply voltages, time, temperature and other variables, and controls the operation of a gain and phase adjustment circuit, so as to maintain constant gain and transmission phase through the RF/microwave power amplifier.
    Type: Grant
    Filed: April 19, 2000
    Date of Patent: October 16, 2001
    Assignee: Spectrian Corporation
    Inventors: John A. Eisenberg, Brian L. Baskin, Charles Stuart Robertson, III, Dieter Werner Statezni, Lance Todd Mucenieks, David Lee Brubaker