Patents by Inventor Errol K. English

Errol K. English 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).

  • Electromagnetic-field polarization twister
    Patent number: 6906685
    Abstract: An apparatus and method to twist the field polarization of an electromagnetic wave over a desired frequency band is described. In one embodiment, a transmission twister rotates the polarization of a linearly-polarized incident field to produce a transmitted field. In one embodiment, the transmission twister includes a resonant polarization-twisting array between two linearly-polarized arrays. In one embodiment, the transmission twister rotates the polarization by 90 degrees. In one embodiment, the transmission twister produces low reflection of a desired incident polarization. In one embodiment, the transmission twister has a transmission coefficient (with respect to the desired incident field polarization and a correspondingly rotated transmitted field polarization) close to unity.
    Type: Grant
    Filed: January 17, 2003
    Date of Patent: June 14, 2005
    Assignee: Mission Research Corporation
    Inventors: Errol K. English, Ethan C. Saladin
  • Electromagnetic-field polarization twister
    Publication number: 20030227417
    Abstract: An apparatus and method to twist the field polarization of an electromagnetic wave over a desired frequency band is described. In one embodiment, a transmission twister rotates the polarization of a linearly-polarized incident field to produce a transmitted field. In one embodiment, the transmission twister includes a resonant polarization-twisting array between two linearly-polarized arrays. In one embodiment, the transmission twister rotates the polarization by 90 degrees. In one embodiment, the transmission twister produces low reflection of a desired incident polarization. In one embodiment, the transmission twister has a transmission coefficient (with respect to the desired incident field polarization and a correspondingly rotated transmitted field polarization) close to unity.
    Type: Application
    Filed: January 17, 2003
    Publication date: December 11, 2003
    Inventors: Errol K. English, Ethan C. Saladin
  • Periodic surfaces for selectively modifying the properties of reflected electromagnetic waves
    Patent number: 5606335
    Abstract: To reduce strong diffractive fields at the baseline edge of a metal body which is reflective of electromagnetic radiation, a substrate substantially transparent to the radiation is placed contiguous to that edge. Conductive reflective elements are carried on an exposed surface of the substrate, in a pattern such that reflection decreases and transparency increases from the baseline toward the terminal edge of the substrate. Thus the diffractive field is gradually reduced.
    Type: Grant
    Filed: April 16, 1991
    Date of Patent: February 25, 1997
    Assignee: Mission Research Corporation
    Inventors: Errol K. English, William J. Leeper