Patents by Inventor Christine G. Thoma

Christine G. Thoma 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).

  • Linear-beam cavity circuits with non-resonant RF loss slabs
    Patent number: 5477107
    Abstract: Lossy slabs are provided in linear-beam tubes such as coupled-cavity TWTs and klystrons to produce a more level tube response over its full operating band, and to eliminate oscillations at the upper cut-off frequency in the TWTs. The slab thicknesses are selected to produce a substantially non-resonant field of about one-quarter wavelength within the slab when the tube is operated within its passband. The slabs are formed from a dielectric material with a conductive mixture of at least about 15%.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: December 19, 1995
    Assignee: Hughes Aircraft Company
    Inventors: Ivo Tammaru, Christine G. Thoma, Roger S. Hollister, Robert G. Ripley