Patents by Inventor Christopher Rutherglen

Christopher Rutherglen 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: 20240413205
    Abstract: A gallium nitride (GaN) transistor which includes a multi-layer/multi-thickness barrier layer formed of segments of progressively increasing thickness between the gate and drain to progressively increase the 2DEG density in the channel from gate to drain. The GaN gate can be formed on the base barrier layer to produce an enhancement mode device with a positive threshold voltage. By forming the gate over a thicker segment of the barrier layer, a GaN transistor with a less positive threshold voltage, or a depletion mode transistor with a negative threshold voltage, can be produced.
    Type: Application
    Filed: June 6, 2024
    Publication date: December 12, 2024
    Applicant: Efficient Power Conversion Corporation
    Inventors: Robert Beach, Christopher Rutherglen, Robert Strittmatter, Jianjun Cao, Alexander Lidow
  • Patent number: 8149170
    Abstract: A carbon nano-tube based variable frequency patch antennas which utilizes a dense network of semiconducting carbon nanotubes as the antenna patch is provided. In preferred embodiments, the resonant frequency of the antenna can be tuned electrically by adjusting appropriate sections of its back-gate, thus altering the effective size of the patch antenna and radiation beam direction can be formed and stirred. In one embodiment, a patch antenna comprises a dense network or thick layer of semiconducting carbon nanotubes grown or deposited on an oxide layer to form a carbon nanotube patch and a partitioned backgate is positioned below the oxide layer with a ground-plane formed from a thin layer of metal. In other embodiments, a patch antenna includes an array of carbon nanotube patches and the ground-plane doubles as the backgate.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: April 3, 2012
    Assignee: The Regents of the University of California
    Inventors: Peter J. Burke, Christopher Rutherglen
  • Publication number: 20090231205
    Abstract: A carbon nano-tube based variable frequency patch antennas which utilizes a dense network of semiconducting carbon nanotubes as the antenna patch is provided. In preferred embodiments, the resonant frequency of the antenna can be tuned electrically by adjusting appropriate sections of its back-gate, thus altering the effective size of the patch antenna and radiation beam direction can be formed and stirred. In one embodiment, a patch antenna comprises a dense network or thick layer of semiconducting carbon nanotubes grown or deposited on an oxide layer to form a carbon nanotube patch and a partitioned backgate is positioned below the oxide layer with a ground-plane formed from a thin layer of metal. In other embodiments, a patch antenna includes an array of carbon nanotube patches and the ground-plane doubles as the backgate.
    Type: Application
    Filed: December 17, 2008
    Publication date: September 17, 2009
    Inventors: Peter J. Burke, Christopher Rutherglen