Patents by Inventor Colin Justis

Colin Justis 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).

  • Radio frequency leakage detection in a cable plant
    Patent number: 9455766
    Abstract: Embodiments described provide detection of RF leaks in a coaxial cable of a cable plant. One embodiment comprises a mobile device that includes an antenna, a quadrature demodulator, and a controller. The antenna receives an RF signal from an RF leak in the coaxial cable. The quadrature demodulator demodulates the RF signal to generate IQ data. The controller determines changes in a phase angle of the RF signal based on the IQ data generated as the mobile device is in motion, and identifies that the mobile device is travelling toward the RF leak responsive to determining that the phase angle is advancing. The controller identifies that the mobile device is travelling away from the RF leak responsive to determining that the phase angle is retarding.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: September 27, 2016
    Assignee: Cable Television Laboratories, Inc
    Inventors: Thomas H. Williams, Colin Justis
  • RADIO FREQUENCY LEAKAGE DETECTION IN A CABLE PLANT
    Publication number: 20160036492
    Abstract: Embodiments described provide detection of RF leaks in a coaxial cable of a cable plant. One embodiment comprises a mobile device that includes an antenna, a quadrature demodulator, and a controller. The antenna receives an RF signal from an RF leak in the coaxial cable. The quadrature demodulator demodulates the RF signal to generate IQ data. The controller determines changes in a phase angle of the RF signal based on the IQ data generated as the mobile device is in motion, and identifies that the mobile device is travelling toward the RF leak responsive to determining that the phase angle is advancing. The controller identifies that the mobile device is travelling away from the RF leak responsive to determining that the phase angle is retarding.
    Type: Application
    Filed: July 29, 2015
    Publication date: February 4, 2016
    Inventors: Thomas H. Williams, Colin Justis