Patents by Inventor Johan Ramirez

Johan Ramirez 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).

  • Microwave variable power solid state power amplifier (SSPA) with constant efficiency and linearity
    Patent number: 8237504
    Abstract: A method of fabricating a solid state power amplifier (SSPA) having variable output power is provided. The method includes coupling a first transistor device to a second transistor device and biasing a drain input of each of the first and second transistor device. Further, the method includes biasing a gate input of each of the first and second transistor device varying a drain to source current of each of the first and second transistor device to enable the SSPA to maintain high power added efficiency (PAE) and consistent linearity over a range of output power levels.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: August 7, 2012
    Assignee: Lockheed Martin Corporation
    Inventors: Shabbir S. Moochalla, William J. Taft, Johan Ramirez