Patents by Inventor Alex T. Chau

Alex T. Chau 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).

  • Patent number: 7348866
    Abstract: An LC filter structure and method for its fabrication, in which multiple shunt capacitors, multiple shunt inductors and multiple coupling inductors are printed on a metal layer formed on a thin dielectric substrate. The capacitors have first electrodes that are formed as spatially separated regions of the metal layer, and a common second electrode formed by a ground plane on the substrate. The shunt inductors are formed as spiral traces connected to the separated regions and to the ground plane, through conductive vias. The coupling inductors are similarly formed as spiral traces in the gaps between the separated regions, the ends of each coupling inductor being connected to respective adjacent regions of the metal layer.
    Type: Grant
    Filed: November 2, 2005
    Date of Patent: March 25, 2008
    Assignee: Northrop Grumman Corporation
    Inventors: Ming-Jong Shiau, Phu H. Tran, Alex T. Chau, Mark Kintis, George W. Schreyer