Patents by Inventor Rudolf Zahn

Rudolf Zahn 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).

  • Method and apparatus for controlling an active antenna
    Patent number: 5367305
    Abstract: A method of controlling an active antenna comprising a matrix of individual transmitting/receiving elements. Two optical frequencies are superposed to generate an optical beat signal in the microwave frequency range. After electrical/optical conversion the beat signal is fed with a defined phase and amplitude to the individual transmitting/receiving elements of the antenna.
    Type: Grant
    Filed: July 26, 1993
    Date of Patent: November 22, 1994
    Assignee: Dornier GmbH
    Inventors: Michael Volker, Stefan Weiss, Rudolf Zahn
  • Microstrip antenna
    Patent number: 5061938
    Abstract: A microstrip antenna has an electrically conductive base plate carrying an electrically insulating substrate on top of which are a plurality of radiating patches, the improvement comprises establishing a relatively large spacing between the electrically insulating substrate and the base plate at lateral dimensions larger than lateral dimensions of the patches and in the vicinity of the patches and either through local elevations of the insulating substrate or by local indents in the base plate being vertically aligned with the patches.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: October 29, 1991
    Assignee: Dornier System GmbH
    Inventors: Rudolf Zahn, Hans W. Schroeder, Christian Borgwardt, Albert Braig, Gunter Helwig, Joachim Boukamp, Oswald Bender, Chung-chi Lin, Werner Scherber
  • Antenna support structure
    Patent number: 4987425
    Abstract: Carrying structure of an active antenna in the aerospace industry uses basically fiber reinforced synthetic material in which heat conductive elements and/or elements conducting electromagnetic waves (electro, optic) are integrated into that support structure for the antenna.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: January 22, 1991
    Assignee: Dornier System GmbH
    Inventors: Rudolf Zahn, Hans W. Schroeder, Christian Borgwardt, Albert Braig, Gunter Helwig, Kay Dittrich