Patents by Inventor John E. Carlstrom

John E. Carlstrom 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).

  • Broadband high precision circular polarizers and retarders in waveguides
    Patent number: 6963253
    Abstract: A retarder is presented for application in systems that transmit radiation through waveguides, such as microwave or millimeter-wave systems. The retarder is a compound device comprising multiple single element retarders, each of which introduces a retardation phase between different polarization states, and each of which is set at an orientation angle. The phases and angles are selected to maximize the operational bandwidth of the compound retarder. The selection of the phases and angles may be found by solving a set of simultaneous equations.
    Type: Grant
    Filed: February 18, 2003
    Date of Patent: November 8, 2005
    Assignee: University of Chicago
    Inventors: John M. Kovac, John E. Carlstrom
  • Broadband high precision circular polarizers and retarders in waveguides
    Publication number: 20030227344
    Abstract: A retarder is presented for application in systems that transmit radiation through waveguides, such as microwave or millimeter-wave systems. The retarder is a compound device comprising multiple single element retarders, each of which introduces a retardation phase between different polarization states, and each of which is set at an orientation angle. The phases and angles are selected to maximize the operational bandwidth of the compound retarder. The selection of the phases and angles may be found by solving a set of simultaneous equations.
    Type: Application
    Filed: February 18, 2003
    Publication date: December 11, 2003
    Inventors: John M. Kovac, John E. Carlstrom