Patents by Inventor Robert J. Wohlers

Robert J. Wohlers 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).

  • Decoder for a space retrodirective array
    Patent number: 4210910
    Abstract: A modulating signal which is selectively changed as a function of time is applied to the modulating diodes of a retrodirective array. The diodes modulate the signal reflected from the array. A decoder coacting with the illuminating radar can extract information from the time-frequency code superimposed on the return signal to thereby identify the target.
    Type: Grant
    Filed: January 15, 1979
    Date of Patent: July 1, 1980
    Assignee: Calspan Corporation
    Inventor: Robert J. Wohlers
  • Method of reducing the radar cross-section of a dielectric body
    Patent number: 4047174
    Abstract: An ablative coated missile nosecone or the like is coated with a thin resive coating, and then with a thin conductive coating. The conductive coating may be laid down in a predetermined pattern. These coatings allow the nosecone to have a radar cross-section the same as a metal cone of the same size, rather than the larger radar cross-section presented by the dielectric ablative nosecone. Alternately, the dielectric may have a conductive material interspersed therein, such as graphite.
    Type: Grant
    Filed: June 7, 1968
    Date of Patent: September 6, 1977
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Robert J. Wohlers
  • Monocycle pulse generator
    Patent number: 3997843
    Abstract: The radio frequency source for a low power, lightweight radar is provided by operating a transistor in the avalanche mode. An open delay line is in the collector circuit and a shorted delay line in shunt with the output line is part of the emitter load. The resulting device can be employed as a low power, nanosecond, monocycle pulse generator with low range, or time domain, sidelobes.
    Type: Grant
    Filed: June 20, 1975
    Date of Patent: December 14, 1976
    Assignee: Calspan Corporation
    Inventor: Robert J. Wohlers
  • Circular retrodirective array
    Patent number: 3958246
    Abstract: The retrodirective array antenna of the present invention employs a circular, focusing parallel plate lens to interconnect array elements, thus producing a body with an inherently large radar cross section. By modulating the radiated signal from such an array, it is possible to meet the requirements for passive beacon and data transmission applications. Information transmittal is accomplished via the selection of the modulation function.
    Type: Grant
    Filed: July 5, 1974
    Date of Patent: May 18, 1976
    Assignee: Calspan Corporation
    Inventors: Robert J. Wohlers, Stephen N. Andre