Patents by Inventor James G Champlain

James G Champlain 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).

  • P-N junction for use as an RF mixer from GHZ to THZ frequencies
    Patent number: 8076700
    Abstract: This disclosure describes a semiconductor device that can be used as a mixer at RF frequencies extending from a few tens of GHz into the THz frequency range. The device is composed of narrow bandgap semiconductors grown by solid source molecular beam epitaxy. The device can comprise a GaSb substrate, a AlSb layer on the GaSb substrate, a In0.69Al0.31As0.41Sb0.59 layer, on the AlSb layer and wherein the In0.69Al0.31As0.41Sb0.59 comprises varying levels of Te doping, a In0.27Ga0.73Sb layer on the In0.69Al0.31As0.41 Sb0.59 layer, wherein the In0.27Ga0.73Sb layer is Be doped, wherein the first section of the In0.69Al0.31As0.41Sb0.59 layer has is Te doped, wherein the second section of the In0.69Al0.31As0.41Sb0.59 layer has a grade in Te concentration, and wherein the third section of the In0.69Al0.31As0.41Sb0.59 layer is Te doped.
    Type: Grant
    Filed: June 2, 2009
    Date of Patent: December 13, 2011
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Richard Magno, Mario Ancona, John Bradley Boos, James G Champlain, Harvey S Newman