Patents by Inventor Ross J. Lahlum, Jr.

Ross J. Lahlum, Jr. 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).

  • Power combiner with harmonic selectivity
    Patent number: 5939939
    Abstract: A power amplifier (517) for amplifying an operating signal includes an amplifier (538), an amplifier (540), and a power combiner (518) with harmonic selectivity. The power combiner (518) includes a transmission line section (541), a transmission line section (545), and a resistor (554). The transmission line section (541) is coupled to an amplifier output of the amplifier (538), and the transmission line section (545) is coupled to an amplifier output of the amplifier (540) and to the transmission line section (541). A capacitor (546) is coupled in parallel to a transmission line section (542) of the transmission line section (541), and a capacitor (548) is coupled in parallel to a transmission line section (544) of the transmission line section (545).
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: August 17, 1999
    Assignee: Motorola, Inc.
    Inventors: Michael P. Gaynor, John E. Lawrence, Ross J. Lahlum, Jr.