Patents by Inventor David R. Brunfeldt

David R. Brunfeldt 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).

  • Vector network analyzer
    Patent number: 5307284
    Abstract: A vector network analyzer utilizes a single voltage controlled oscillator to produce a sweep frequency over time, which is supplied to a device under test. The return signal from the device under test is delayed and mixed with the original signal to produce an intermediate frequency signal that is digitized and the data manipulated by a computer to measure the reflection coefficient or transmission coefficient of the device under test.
    Type: Grant
    Filed: August 27, 1992
    Date of Patent: April 26, 1994
    Assignee: Applied Microwave Corporation
    Inventors: David R. Brunfeldt, Somnath Mukherjee