Patents by Inventor David Ruimin CHEN

David Ruimin CHEN 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).

  • Adaptive load for coupler in broadband multimode multiband front end module
    Patent number: 9755670
    Abstract: Directional couplers for front end modules (FEMs) are disclosed that include a first port configured to receive a radio-frequency (RF) signal, a second port connected to the first port via a first transmission line and configured to provide an RF output signal, a third port connected to a second transmission line, the second transmission line being electromagnetically coupled to the first transmission line, and a fourth port connected to the second transmission line. The directional couplers further include an adaptive complex termination circuit connected to the fourth port and configured to provide an adaptive complex termination impedance selected to optimize combined performance of the directional couplers over multiple frequency bands.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: September 5, 2017
    Assignee: SKYWORKS SOLUTIONS, INC.
    Inventors: David Ruimin Chen, Shiaw Wen Chang, Ede Peter Enobakhare, Brian Blu DuVerneay
  • ADAPTIVE LOAD FOR COUPLER IN BROADBAND MULTIMODE MULTIBAND FRONT END MODULE
    Publication number: 20170077966
    Abstract: Directional couplers for front end modules (FEMs) are disclosed that include a first port configured to receive a radio-frequency (RF) signal, a second port connected to the first port via a first transmission line and configured to provide an RF output signal, a third port connected to a second transmission line, the second transmission line being electromagnetically coupled to the first transmission line, and a fourth port connected to the second transmission line. The directional couplers further include an adaptive complex termination circuit connected to the fourth port and configured to provide an adaptive complex termination impedance selected to optimize combined performance of the directional couplers over multiple frequency bands.
    Type: Application
    Filed: November 22, 2016
    Publication date: March 16, 2017
    Inventors: David Ruimin Chen, Shiaw Wen Chang, Ede Peter Enobakhare, Brian Blu DuVerneay
  • ADAPTIVE LOAD FOR COUPLER IN BROADBAND MULTIMODE MULTI-BAND FRONT END MODULE
    Publication number: 20150349742
    Abstract: Directional couplers for front end modules (FEMs) are disclosed that include a first port configured to receive a radio-frequency (RF) signal, a second port connected to the first port via a first transmission line and configured to provide an RF output signal, and a third port connected to a second transmission line, the second transmission line coupled to the first transmission line. A directional coupler in accordance with the present disclosure may further include a termination circuit connected to the second transmission line and configured to provide a first impedance when the RF signal is within a first frequency band and provide a second impedance when the RF signal is within a second frequency band.
    Type: Application
    Filed: May 28, 2015
    Publication date: December 3, 2015
    Inventors: David Ruimin CHEN, Shiaw Wen CHANG, Ede Peter ENOBAKHARE, Brian Blu DUVERNEAY