Patents by Inventor Stacey B. T. Bui

Stacey B. T. Bui 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).

  • Diode mixer implemented in a planar monolithic IC
    Patent number: 5428838
    Abstract: A monolithic diode star mixer incorporating an RF balun and a local oscillator balun in which a center microstrip conductor for each of the baluns is configured between parallel strip transmission lines in a common plane. The RF and local oscillator baluns are positioned in a ground plane such that the baluns are at relative right angles to each other and in which the center microstrips are connected. A center ring conductor enables the diodes associated with the mixer to be connected to the transmission lines and a common connection point. Additionally, an intermediate frequency transmission line is also connected to the conductive ring.
    Type: Grant
    Filed: July 13, 1993
    Date of Patent: June 27, 1995
    Assignee: TRW Inc.
    Inventors: Kwo W. Chang, Tzu-Hung Chen, Louis C. T. Lui, Stacey B. T. Bui