Patents by Inventor Mohammedreza Mehrpoo

Mohammedreza Mehrpoo 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).

  • RF-DAC based phase modulator
    Patent number: 10644656
    Abstract: A wideband, frequency agile, radio frequency digital-to-analog converter (RF-DAC) based phase modulator includes first, second, and third RF-DACs, each configured to upconvert an input I/Q digital baseband signal pair to a local oscillator (LO) frequency but with the first RF-DAC being driven by a first set of LO clocks, the second RF-DAC being driven by a second set of LO clocks that is forty-five degrees out of phase with respect to the first set of LO clocks, and the third RF-DAC being driven by a third set of LO clocks that is a further forty-five degrees out of phase with respect to the second set of LO clocks. First, second, and third upconverted analog signals produced by the first, second, and third RF-DACs are combined to reinforce the fundamental LO component while canceling 3rd-order and 5th-order LO harmonics.
    Type: Grant
    Filed: January 3, 2018
    Date of Patent: May 5, 2020
    Assignee: Technische Universiteit Delft
    Inventors: Leonardus Cornelius Nicolaas de Vreede, Seyed Morteza Alavi, Mohammedreza Mehrpoo, Mikhail Evgenyevich Polushkin, Mohsen Hashemi, Yiyu Shen
  • RF-DAC BASED PHASE MODULATOR
    Publication number: 20190207565
    Abstract: A wideband, frequency agile, radio frequency digital-to-analog converter (RF-DAC) based phase modulator includes first, second, and third RF-DACs, each configured to upconvert an input I/Q digital baseband signal pair to a local oscillator (LO) frequency but with the first RF-DAC being driven by a first set of LO clocks, the second RF-DAC being driven by a second set of LO clocks that is forty-five degrees out of phase with respect to the first set of LO clocks, and the third RF-DAC being driven by a third set of LO clocks that is a further forty-five degrees out of phase with respect to the second set of LO clocks. First, second, and third upconverted analog signals produced by the first, second, and third RF-DACs are combined to reinforce the fundamental LO component while canceling 3rd-order and 5th-order LO harmonics.
    Type: Application
    Filed: January 3, 2018
    Publication date: July 4, 2019
    Applicant: Technische Universiteit Delft
    Inventors: Leonardus Cornelius Nicolaas de Vreede, Seyed Morteza Alavi, Mohammedreza Mehrpoo, Mikhail Evgenyevich Polushkin, Mohsen Hashemi, Yiyu Shen