Patents by Inventor Thomas Middlebrook

Thomas Middlebrook 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).

  • Publication number: 20060255879
    Abstract: According to one embodiment of the invention, a power absorber for receiving a signal having a fundamental frequency includes an input node for receiving the signal and a first PIN diode circuit having a first end electrically connected at the input node and a second end. The first PIN diode circuit includes at least one PIN diode. The absorber also includes a load resistance having a first end electrically connected to the second end of the PIN diode circuit and a second end electrically connected to a reference voltage. The absorber also includes a quarter wave transmission line having a first end electrically connected to the input node at a second end. The quarter wave transmission line has an electrical link that is one quarter of the wavelength of the fundamental frequency. The power absorber also includes a second PIN diode circuit having an input electrically connected to the second end of the quarter wave transmission line and an output electrically connected to the reference voltage.
    Type: Application
    Filed: May 12, 2005
    Publication date: November 16, 2006
    Inventors: David Heston, John Heston, Thomas Middlebrook