Patents by Inventor Mark B. Walker

Mark B. Walker 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).

  • Technology for extending a radio frequency (RF) bandwidth of an envelope tracking (ET) power amplifier (PA)
    Patent number: 10109999
    Abstract: An envelope tracking power supply (ET PS) transmission line switch can be operable between an ET PS and a radio frequency (RF) power amplifier (PA). The ET PS transmission line switch assembly can include a quarter wavelength (¼?) transmission line configured for high impedance at a specified low RF and a switch coupled to a specified point on the quarter wavelength transmission line to generate a high frequency quarter wavelength transmission line when the switch is toggled. The quarter wavelength transmission line is configured to be coupled to a voltage output of the ET PS and a RF output of the RF PA. The high frequency quarter wavelength transmission line is configured for high impedance at a specified high RF, and the specified high RF is higher than the specified low RF.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: October 23, 2018
    Assignee: Raytheon Company
    Inventor: Mark B. Walker
  • TECHNOLOGY FOR EXTENDING A RADIO FREQUENCY (RF) BANDWIDTH OF AN ENVELOPE TRACKING (ET) POWER AMPLIFIER (PA)
    Publication number: 20140125135
    Abstract: An envelope tracking power supply (ET PS) transmission line switch can be operable between an ET PS and a radio frequency (RF) power amplifier (PA). The ET PS transmission line switch assembly can include a quarter wavelength (¼?) transmission line configured for high impedance at a specified low RF and a switch coupled to a specified point on the quarter wavelength transmission line to generate a high frequency quarter wavelength transmission line when the switch is toggled. The quarter wavelength transmission line is configured to be coupled to a voltage output of the ET PS and a RF output of the RF PA. The high frequency quarter wavelength transmission line is configured for high impedance at a specified high RF, and the specified high RF is higher than the specified low RF.
    Type: Application
    Filed: June 24, 2013
    Publication date: May 8, 2014
    Inventor: Mark B. Walker