Patents by Inventor Keith W. Howell

Keith W. Howell 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).

  • Interconnecting a port of a microwave circuit package and a microwave component mounted in the microwave circuit package
    Patent number: 7355491
    Abstract: In one aspect, a signal path is described. The signal path has a nominal impedance over a specified bandwidth and interconnects a port of a microwave circuit package and a microwave component mounted in the microwave circuit package. The signal path includes an inductive transition and first and second capacitive structures. The inductive transition extends from a first point on the signal path to a second point on the signal path and has an excess impedance above the nominal impedance. The first and second capacitive structures respectively shunt the first and second points on the signal path to compensate the excess impedance of the inductive transition. The inductive transition and the first and second capacitive structures approximate a filter having an impedance substantially matching the nominal impedance over the specified bandwidth.
    Type: Grant
    Filed: January 24, 2007
    Date of Patent: April 8, 2008
    Assignee: Avago Technologies Wireless IP Pte Ltd
    Inventors: Dean B. Nicholson, Reto Zingg, Keith W. Howell, Eric R. Ehlers
  • Interconnecting a port of a microwave circuit package and a microwave component mounted in the microwave circuit package
    Patent number: 7187249
    Abstract: In one aspect, a signal path is described. The signal path has a nominal impedance over a specified bandwidth and interconnects a port of a microwave circuit package and a microwave component mounted in the microwave circuit package. The signal path includes an inductive transition and first and second capacitive structures. The inductive transition extends from a first point on the signal path to a second point on the signal path and has an excess impedance above the nominal impedance. The first and second capacitive structures respectively shunt the first and second points on the signal path to compensate the excess impedance of the inductive transition. The inductive transition and the first and second capacitive structures approximate a filter having an impedance substantially matching the nominal impedance over the specified bandwidth.
    Type: Grant
    Filed: September 24, 2004
    Date of Patent: March 6, 2007
    Assignee: Avago Technologies Wireless IP (Singapore) Pte. Ltd.
    Inventors: Dean B. Nicholson, Reto Zingg, Keith W. Howell, Eric R. Ehlers