Patents by Inventor John Tjoelker

John Tjoelker 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).

  • Y-slot waveguide antenna element
    Patent number: 4644343
    Abstract: Disclosed is an antenna element that is defined by a substantially Y-shaped slot (22) formed in the broad face (12) of a section of dielectrically-filled waveguide (10). Various design parameters including leg length, leg width and angle formed between the legs permit the antenna element to be configured for circularly polarized radiation of a controlled portion of the electromagnetic energy that propagates along the waveguide.
    Type: Grant
    Filed: September 30, 1985
    Date of Patent: February 17, 1987
    Assignee: The Boeing Company
    Inventors: Wayne A. Schneider, Margaret S. Morse, John Tjoelker