Patents by Inventor Omar Asfar

Omar Asfar 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).

  • Miniaturized reflector antenna
    Patent number: 12160041
    Abstract: A multi-core dielectric circular waveguide (MCDCW) is described. A hybrid mode excitation for multi-core dielectric filled circular waveguide fed parabolic antenna is also described. A multi-core dielectric circular waveguide with four cylinders of different relative permittivity (?r) inside each other is used to generate the hybrid mode (HE11) directly without need for coupling TE11 and TM11 modes as in prior art corrugated waveguide feeders. This mode is preferable to be used as operating mode to feed the reflector. Four concentric cylinders of different relative permittivity ?r are used as an example.
    Type: Grant
    Filed: April 29, 2022
    Date of Patent: December 3, 2024
    Assignee: The Board of Trustees of The University of Alabama
    Inventors: Feras Abushakra, Seong Heon Jeong, Omar Asfar
  • MINIATURIZED REFLECTOR ANTENNA
    Publication number: 20220352639
    Abstract: A multi-core dielectric circular waveguide (MCDCW) is described. A hybrid mode excitation for multi-core dielectric filled circular waveguide fed parabolic antenna is also described. A multi-core dielectric circular waveguide with four cylinders of different relative permittivity (?r) inside each other is used to generate the hybrid mode (HE11) directly without need for coupling TE11 and TM11 modes as in prior art corrugated waveguide feeders. This mode is preferable to be used as operating mode to feed the reflector. Four concentric cylinders of different relative permittivity ?r are used as an example.
    Type: Application
    Filed: April 29, 2022
    Publication date: November 3, 2022
    Inventors: Feras Abushakra, Seong Heon Jeong, Omar Asfar