Patents by Inventor Fengxi Huang

Fengxi Huang 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).

  • Three dimensional tunable filters with an absolute constant bandwidth and method
    Patent number: 10056664
    Abstract: A tunable bandpass filter to provide a constant absolute bandwidth across the entire tuning range. The filter comprises of a plurality of tunable resonators, each having an enclosure. A resonating structure extending upwardly from the bottom surface of the enclosure and a tuning screw with a flat head extending downwardly from the top surface of the enclosure, wherein the resonating structure and the flat head of the screw face each other and form a gap. The height of the tuning screw can be adjusted to change the gap between the resonating structure and the flat head. The adjustable gap of the present filter allows for tunable filter operation.
    Type: Grant
    Filed: August 17, 2015
    Date of Patent: August 21, 2018
    Inventors: Fengxi Huang, Siamak Fouladi Azarnaminy, Mitra Nasresfahani, Raafat R. Mansour
  • THREE DIMENSIONAL TUNABLE FILTERS WITH AN ABSOLUTE CONSTANT BANDWIDTH AND METHOD
    Publication number: 20160049710
    Abstract: A tunable bandpass filter to provide a constant absolute bandwidth across the entire tuning range. The filter comprises of a plurality of tunable resonators, each having an enclosure. A resonating structure extending upwardly from the bottom surface of the enclosure and a tuning screw with a flat head extending downwardly from the top surface of the enclosure, wherein the resonating structure and the flat head of the screw face each other and form a gap. The height of the tuning screw can be adjusted to change the gap between the resonating structure and the flat head. The adjustable gap of the present filter allows for tunable filter operation.
    Type: Application
    Filed: August 17, 2015
    Publication date: February 18, 2016
    Inventors: Fengxi Huang, Siamak Fouladi Azarnaminy, Mitra Nasresfahani, Raafat R. Mansour
  • Tunable bandpass filter device and method
    Patent number: 9236846
    Abstract: An embodiment radio frequency MicroElectroMechanical (RF-MEMS) tunable bandpass filter includes one or more tunable resonators, each of which includes an electrically reconfigurable capacitor bank, a tuning screw, and a resonating structure. In an embodiment, the capacitor bank includes fixed value capacitors and switches to vary the capacitance of the resonator. In an embodiment, the capacitor bank includes variable capacitors and direct current (DC) bias circuits to vary the capacitance of the resonator. The filter may be incorporated into a time division duplexing (TDD) base station or other wireless communications device.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: January 12, 2016
    Assignee: Futurewei Technologies, Inc.
    Inventors: Siamak Fouladi Azarnaminy, Fengxi Huang, Dong Yan, Raafat Mansour
  • Tunable Bandpass Filter Device and Method
    Publication number: 20130142089
    Abstract: An embodiment radio frequency MicroElectroMechanical (RF-MEMS) tunable bandpass filter includes one or more tunable resonators, each of which includes an electrically reconfigurable capacitor bank, a tuning screw, and a resonating structure. In an embodiment, the capacitor bank includes fixed value capacitors and switches to vary the capacitance of the resonator. In an embodiment, the capacitor bank includes variable capacitors and direct current (DC) bias circuits to vary the capacitance of the resonator. The filter may be incorporated into a time division duplexing (TDD) base station or other wireless communications device.
    Type: Application
    Filed: February 21, 2012
    Publication date: June 6, 2013
    Applicant: FUTUREWEI TECHNOLOGIES, INC.
    Inventors: Siamak Fouladi Azarnaminy, Fengxi Huang, Dong Yan, Raafat Mansour