Patents by Inventor Charles Apker

Charles Apker 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).

  • Antenna array calibration
    Patent number: 10371822
    Abstract: An apparatus for performing calibration of an antenna array having a plurality of antennas including at least a first antenna and a second antenna. The apparatus includes a global navigation satellite system receiver configured to measure a first phase of a first signal received by the first antenna from a satellite and a second phase of a second signal received by the second antenna from the satellite. The apparatus also includes at least one processor configured to receive the first phase and the second phase from the global navigation satellite system receiver and to operate in a calibration mode to determine a difference between the first and second phases.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: August 6, 2019
    Assignee: Lockheed Martin Corporation
    Inventors: Charles Apker, Mark Bullock, Steven Pratt, David D. Schmidt, Matthew Stafford, Scott O. Sorber
  • ANTENNA ARRAY CALIBRATION
    Publication number: 20140232596
    Abstract: An apparatus for performing calibration of an antenna array having a plurality of antennas including at least a first antenna and a second antenna. The apparatus includes a global navigation satellite system receiver configured to measure a first phase of a first signal received by the first antenna from a satellite and a second phase of a second signal received by the second antenna from the satellite. The apparatus also includes at least one processor configured to receive the first phase and the second phase from the global navigation satellite system receiver and to operate in a calibration mode to determine a difference between the first and second phases.
    Type: Application
    Filed: February 21, 2013
    Publication date: August 21, 2014
    Applicant: Lockheed Martin Corporation
    Inventors: Charles Apker, Mark Bullock, Steven Pratt, David D. Schmidt, Matthew Stafford, Scott O. Sorber