Patents by Inventor Di Qian

Di Qian 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).

  • High dynamic range RF power monitor
    Patent number: 9791489
    Abstract: A device with at least one channel for measuring high dynamic range, radio frequency (RF) power levels over broad-ranging duty cycles includes a power sensor circuit comprising at least one logarithmic amplifier; at least one directional RF coupler electrically connected to the at least one power sensor; at least one RF attenuator electrically connected to the at least one RF coupler; and at least one sampling circuit electrically connected to the at least one RF attenuator and the at least one RF coupler. The at least one sampling circuit performs analog-to-digital conversion of electrical signals received to provide digitals signals for measuring the RF power level in the at least one channel.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: October 17, 2017
    Assignee: THE JOHNS HOPKINS UNIVERSITY
    Inventors: Paul A. Bottomley, William Edelstein, Abdel-Monem M. El-Sharkawy, Di Qian
  • HIGH DYNAMIC RANGE RF POWER MONITOR
    Publication number: 20140015547
    Abstract: A device with at least one channel for measuring high dynamic range, radio frequency (RF) power levels over broad-ranging duty cycles includes a power sensor circuit comprising at least one logarithmic amplifier; at least one directional RF coupler electrically connected to the at least one power sensor; at least one RF attenuator electrically connected to the at least one RF coupler; and at least one sampling circuit electrically connected to the at least one RF attenuator and the at least one RF coupler. The at least one sampling circuit performs analog-to-digital conversion of electrical signals received to provide digitals signals for measuring the RF power level in the at least one channel.
    Type: Application
    Filed: March 22, 2012
    Publication date: January 16, 2014
    Applicant: The Johns Hopkins University
    Inventors: Paul A. Bottomley, William Edelstein, Abdel-Monem M. El-Sharkawy, Di Qian