Patents by Inventor Michael H. Cobb

Michael H. Cobb 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).

  • Microwave reflectiion amplifiers having increased bandwidth
    Patent number: 4902985
    Abstract: A four diode reflection amplifier having a relatively wide bandwidth of at least 5 percent over the frequency range of 43.5 to 45.5 GHz includes three magic Ts arranged to provide a 4-way passive power combiner. The 4-way passive power combiner symmetrically couples each of the four diode amplifiers to an input/output port of the reflection amplifier. To provide the improved bandwidth performance, a perturbation impedance in the form of a single shunt capacitance is inserted at the input/output port of the reflection amplifier to provide a selected perturbation in the load impedance and hence the reflection characteristic seen by the reflection amplifier over a selected band of operation of the amplifier.
    Type: Grant
    Filed: February 25, 1988
    Date of Patent: February 20, 1990
    Assignee: Raytheon Company
    Inventors: Thomas K. Arthur, Michael H. Cobb, James W. McClymonds