Patents by Inventor Lawrence H. Yum

Lawrence H. Yum 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: 4450418
    Abstract: A high frequency stripline-type power divider/combiner comprising a patterned metal layer having an input and two output strips, a dielectric substrate, and a resistive material layer interposed between the metal layer and substrate. A portion of the resistive material layer defines a resistive bridge that extends between and resistively interconnects the output strips, thereby acting as a resistive load for the cancellation of reflected power output signals. The patterned metal layer and resistive bridge are concurrently defined by standard photolithographic and etching techniques, thereby allowing the simple and accurate fabrication of an integral power divider/combiner.
    Type: Grant
    Filed: December 28, 1981
    Date of Patent: May 22, 1984
    Assignee: Hughes Aircraft Company
    Inventors: Lawrence H. Yum, Fu-Chuan Chen