Patents by Inventor Ronald F. Keilmeyer, Jr.

Ronald F. Keilmeyer, 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).

  • Lumped element realization of ring hybrids including .pi. circuit and tank circuit means
    Patent number: 5175517
    Abstract: A broad-band lumped element ring hybrid is comprised of a .pi. equivalent of a transmission line which is coupled to an electric ground through either a plurality of capacitors or plurality of inductors. The plurality of capacitors which are coupled to ground are coupled together with an inductor, while the plurality of inductors which are coupled to ground are coupled together with a capacitor. A plurality of tank circuits are coupled to the .pi. equivalent to broaden the bandwidth of the ring hybrid. Each tank circuit comprises an inductor and a capacitor.
    Type: Grant
    Filed: July 1, 1991
    Date of Patent: December 29, 1992
    Assignee: Motorola, Inc.
    Inventors: Michael Dydyk, Ronald F. Keilmeyer, Jr., John K. Lauchner