Patents by Inventor Roger C. Rudduck

Roger C. Rudduck 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).

  • Serrated electromagnetic absorber
    Patent number: 5208599
    Abstract: Electromagnetic absorber having serrations on a surface or surfaces thereof to reduce reflectivity of incident electromagnetic waves thereon. The serrations form a plurality of fins, the height of adjacent fins being spaced by a small distance. Preferably the total absorber wedge height is greater than about 1 wavelength at the lowest design frequency and the height between the serration tips is less than 1/4 wavelength at the lowest design frequency.
    Type: Grant
    Filed: August 28, 1991
    Date of Patent: May 4, 1993
    Assignee: Ohio State University
    Inventors: Roger C. Rudduck, Walter D. Burnside, Chang-Fa Yang
  • Compact range for variable-zone measurements
    Patent number: H514
    Abstract: A compact range for testing antennas or radar targets includes a source for directing energy along a feedline toward a parabolic reflector. The reflected wave is a spherical wave with a radius dependent on the distance of the source from the focal point of the reflector.
    Type: Grant
    Filed: February 27, 1987
    Date of Patent: August 2, 1988
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Walter D. Burnside, Roger C. Rudduck, Jiunn S. Yu