Patents by Inventor Crystal L. Bethards

Crystal L. Bethards 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).

  • Flat lens antenna
    Patent number: 11973270
    Abstract: Various examples are provided for flat lens antennas and their operation. In one example, among others, an antenna includes electrically thin (W<<?high), highly conducting, TEM mode antenna arms fed at a first end by a balun. The TEM mode antenna arms can be embedded in a spatially varied anisotropic dielectric material. A separation between the TEM mode antenna arms can increase from the first end to a second end where the TEM mode antenna arms transition to resistive card (Rcard) terminations when the TEM mode antenna arms are separated by a distance Hr, where a ratio of Hr to a height (H) of the antenna is in a range from about 0.2 to about 0.8.
    Type: Grant
    Filed: August 14, 2020
    Date of Patent: April 30, 2024
    Assignee: COMPASS TECHNOLOGY GROUP LLC
    Inventors: John W. Schultz, Brian L Petrie, Crystal L Bethards, James G. Maloney
  • Flat Lens Antenna
    Publication number: 20220278459
    Abstract: Various examples are provided for flat lens antennas and their operation. In one example, among others, an antenna includes electrically thin (W<<?high), highly conducting, TEM mode antenna arms fed at a first end by a balun. The TEM mode antenna arms can be embedded in a spatially varied anisotropic dielectric material. A separation between the TEM mode antenna arms can increase from the first end to a second end where the TEM mode antenna arms transition to resistive card (Rcard) terminations when the TEM mode antenna arms are separated by a distance Hr, where a ratio of Hr to a height (H) of the antenna is in a range from about 0.2 to about 0.8.
    Type: Application
    Filed: August 14, 2020
    Publication date: September 1, 2022
    Inventors: John W. Schultz, Brian L. Petrie, Crystal L. Bethards, James G. Maloney