Patents by Inventor Yongfei Zhu

Yongfei Zhu 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).

  • Publication number: 20190153690
    Abstract: Automatic remove equipment for disaster blooming marine organisms of sea water intake channel belongs to the field of marine environmental engineering and equipment. The equipment comprises a cod-end of collecting net, a saw blade at the end of net, a fixation and support system, a submersible spiral pump, a transport pipe system, a separating system on coast and floats. The equipment collects the disaster blooming marine organisms in the sea water channel into the bottom of a cod-end of collecting net, and cuts and decomposes the collected disaster blooming marine organisms by using a saw blade at the end of net under the combined action of the water flow power and the suction pressure of a submersible spiral pump. Fragments after cutting are sucked by the submersible spiral pump and delivered to a coast, and are subjected to solid-liquid separation by a separating system on coast and then are centrally disposed.
    Type: Application
    Filed: April 28, 2017
    Publication date: May 23, 2019
    Inventors: Kui YOU, Caihua MA, Honggang MA, Xintian LIU, Chen HOU, Yongfei LIU, Zewen CHEN, Yuyu ZHANG, Jing DONG, Fang ZHANG, Ling ZHU, Chaolun LI, Zhenhua YAO, Anyi CHEN, Zehao ZHANG, Shiwen HE
  • Publication number: 20190068544
    Abstract: A communications method and apparatus for a Virtual Extensible Local Area Network (VXLAN), where the method includes receiving, by a first layer-3 gateway device, host routing information from a second layer-3 gateway device, where the host routing information includes an Internet Protocol (IP) address of a first host, a media access control (MAC) address of the first host, and a VXLAN tunnel end point (VTEP) identifier of a next hop of the first layer-3 gateway device and that exists when the first layer-3 gateway device sends information to the first host, and forwarding, by the first layer-3 gateway device, a traffic packet destined for the first host or acting, by the first layer-3 gateway device, as an Address Resolution Protocol (ARP) proxy for the first host, based on the host routing information. Hence, traffic waste can be reduced.
    Type: Application
    Filed: October 17, 2018
    Publication date: February 28, 2019
    Inventors: Weiguo Hao, Yuan Gao, Tao Han, Yongfei Zhu
  • Publication number: 20180131619
    Abstract: Embodiments include a load balancing method used to implement load balancing in a network. The method is performed by a first PE device, includes: obtaining a first device identifier of the first PE device, and obtaining a target ESI that is of a target NVE device and is corresponding to the first device identifier and a VN ID that is of a target VN accessed by the target NVE device and is corresponding to the first device identifier; receiving a message from a second PE device, where the message carries a second device identifier of the second PE device, and the target ESI and the VN ID of the target VN that are corresponding to the second device identifier; and determining whether the first PE device is a DF of the target NVE device in the target VN.
    Type: Application
    Filed: January 9, 2018
    Publication date: May 10, 2018
    Inventors: Weiguo Hao, Yongfei Zhu
  • Patent number: 9847807
    Abstract: A system that incorporates teachings of the subject disclosure may include, for example, a communication device including a matching network for impedance tuning and pairs of antennas that can be utilized as primary and diversity antennas, respectively, and can provide high radiation efficiency. An RF switch can be utilized for re-configuring the primary and diversity antennas. Other embodiments are disclosed.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: December 19, 2017
    Assignee: BlackBerry Limited
    Inventors: Yongfei Zhu, Gregory Mendolia, James Dilorenzo, Jeffrey Schroeder
  • Patent number: 9698758
    Abstract: Methods for generating a look-up table relating a plurality of complex reflection coefficients to a plurality of matched states for a tunable matching network. Typical steps include measuring a plurality of complex reflection coefficients resulting from a plurality of impedance loads while the tunable matching network is in a predetermined state, determining a plurality of matched states for the plurality of impedance loads, with a matched state determined for each of the plurality of impedance loads and providing the determined matched states as a look-up table. A further step is interpolating the measured complex reflection coefficients and the determined matching states into a set of complex reflection coefficients with predetermined step sizes.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: July 4, 2017
    Assignee: BlackBerry Limited
    Inventors: John Hanford Spears, Wayne Eric Smith, Chenggang Sui, Yongfei Zhu
  • Publication number: 20160105210
    Abstract: A system that incorporates teachings of the subject disclosure may include, for example, a communication device including a matching network for impedance tuning and pairs of antennas that can be utilized as primary and diversity antennas, respectively, and can provide high radiation efficiency. An RF switch can be utilized for re-configuring the primary and diversity antennas. Other embodiments are disclosed.
    Type: Application
    Filed: October 8, 2015
    Publication date: April 14, 2016
    Inventors: YONGFEI ZHU, GREGORY MENDOLIA, JAMES DILORENZO, JEFFREY SCHROEDER
  • Publication number: 20150123870
    Abstract: Methods for generating a look-up table relating a plurality of complex reflection coefficients to a plurality of matched states for a tunable matching network. Typical steps include measuring a plurality of complex reflection coefficients resulting from a plurality of impedance loads while the tunable matching network is in a predetermined state, determining a plurality of matched states for the plurality of impedance loads, with a matched state determined for each of the plurality of impedance loads and providing the determined matched states as a look-up table. A further step is interpolating the measured complex reflection coefficients and the determined matching states into a set of complex reflection coefficients with predetermined step sizes.
    Type: Application
    Filed: January 14, 2015
    Publication date: May 7, 2015
    Inventors: John H. Spears, Wayne Eric Smith, Chenggang Sui, Yongfei Zhu
  • Patent number: 8957742
    Abstract: Methods for generating a look-up table relating a plurality of complex reflection coefficients to a plurality of matched states for a tunable matching network. Typical steps include measuring a plurality of complex reflection coefficients resulting from a plurality of impedance loads while the tunable matching network is in a predetermined state, determining a plurality of matched states for the plurality of impedance loads, with a matched state determined for each of the plurality of impedance loads and providing the determined matched states as a look-up table. A further step is interpolating the measured complex reflection coefficients and the determined matching states into a set of complex reflection coefficients with predetermined step sizes.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: February 17, 2015
    Assignee: BlackBerry Limited
    Inventors: John Hanford Spears, Wayne Eric Smith, Chenggang Sui, Yongfei Zhu
  • Patent number: 8674783
    Abstract: Methods for generating a look-up table relating a plurality of complex reflection coefficients to a plurality of matched states for a tunable matching network. Typical steps include measuring a plurality of complex reflection coefficients resulting from a plurality of impedance loads while the tunable matching network is in a predetermined state, determining a plurality of matched states for the plurality of impedance loads, with a matched state determined for each of the plurality of impedance loads and providing the determined matched states as a look-up table. A further step is interpolating the measured complex reflection coefficients and the determined matching states into a set of complex reflection coefficients with predetermined step sizes.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: March 18, 2014
    Assignee: BlackBerry Limited
    Inventors: John Hanford Spears, Wayne Eric Smith, Yongfei Zhu, Chenggang Sui
  • Patent number: 8421548
    Abstract: Methods for generating a look-up table relating a plurality of complex reflection coefficients to a plurality of matched states for a tunable matching network. Typical steps include measuring a plurality of complex reflection coefficients resulting from a plurality of impedance loads while the tunable matching network is in a predetermined state, determining a plurality of matched states for the plurality of impedance loads, with a matched state determined for each of the plurality of impedance loads and providing the determined matched states as a look-up table. A further step is interpolating the measured complex reflection coefficients and the determined matching states into a set of complex reflection coefficients with predetermined step sizes.
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: April 16, 2013
    Assignee: Research In Motion RF, Inc.
    Inventors: John H. Spears, Wayne E. Smith, Chenggang Sui, Yongfei Zhu
  • Patent number: 8395459
    Abstract: Methods for generating a look-up table relating a plurality of complex reflection coefficients to a plurality of matched states for a tunable matching network. Typical steps include measuring a plurality of complex reflection coefficients resulting from a plurality of impedance loads while the tunable matching network is in a predetermined state, determining a plurality of matched states for the plurality of impedance loads, with a matched state determined for each of the plurality of impedance loads and providing the determined matched states as a look-up table. A further step is interpolating the measured complex reflection coefficients and the determined matching states into a set of complex reflection coefficients with predetermined step sizes.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: March 12, 2013
    Assignee: Research In Motion RF, Inc.
    Inventors: John H. Spears, Wayne Smith, Chenggang Sui, Yongfei Zhu
  • Publication number: 20120154069
    Abstract: Methods for generating a look-up table relating a plurality of complex reflection coefficients to a plurality of matched states for a tunable matching network. Typical steps include measuring a plurality of complex reflection coefficients resulting from a plurality of impedance loads while the tunable matching network is in a predetermined state, determining a plurality of matched states for the plurality of impedance loads, with a matched state determined for each of the plurality of impedance loads and providing the determined matched states as a look-up table. A further step is interpolating the measured complex reflection coefficients and the determined matching states into a set of complex reflection coefficients with predetermined step sizes.
    Type: Application
    Filed: February 29, 2012
    Publication date: June 21, 2012
    Applicant: PARATEK MICROWAVE, INC.
    Inventors: John H. Spears, Wayne E. Smith, Chenggang Sui, Yongfei Zhu
  • Publication number: 20120056689
    Abstract: Methods for generating a look-up table relating a plurality of complex reflection coefficients to a plurality of matched states for a tunable matching network. Typical steps include measuring a plurality of complex reflection coefficients resulting from a plurality of impedance loads while the tunable matching network is in a predetermined state, determining a plurality of matched states for the plurality of impedance loads, with a matched state determined for each of the plurality of impedance loads and providing the determined matched states as a look-up table. A further step is interpolating the measured complex reflection coefficients and the determined matching states into a set of complex reflection coefficients with predetermined step sizes.
    Type: Application
    Filed: November 16, 2011
    Publication date: March 8, 2012
    Applicant: PARATEK MICROWAVE, INC.
    Inventors: John H. Spears, Wayne E. Smith, Chenggang Sui, Yongfei Zhu
  • Patent number: 8072285
    Abstract: Methods for generating a look-up table relating a plurality of complex reflection coefficients to a plurality of matched states for a tunable matching network. Typical steps include measuring a plurality of complex reflection coefficients resulting from a plurality of impedance loads while the tunable matching network is in a predetermined state, determining a plurality of matched states for the plurality of impedance loads, with a matched state determined for each of the plurality of impedance loads and providing the determined matched states as a look-up table. A further step is interpolating the measured complex reflection coefficients and the determined matching states into a set of complex reflection coefficients with predetermined step sizes.
    Type: Grant
    Filed: September 24, 2008
    Date of Patent: December 6, 2011
    Assignee: Paratek Microwave, Inc.
    Inventors: John H. Spears, Wayne E. Smith, Chenggang Sui, Yongfei Zhu
  • Publication number: 20100073103
    Abstract: Methods for generating a look-up table relating a plurality of complex reflection coefficients to a plurality of matched states for a tunable matching network. Typical steps include measuring a plurality of complex reflection coefficients resulting from a plurality of impedance loads while the tunable matching network is in a predetermined state, determining a plurality of matched states for the plurality of impedance loads, with a matched state determined for each of the plurality of impedance loads and providing the determined matched states as a look-up table. A further step is interpolating the measured complex reflection coefficients and the determined matching states into a set of complex reflection coefficients with predetermined step sizes.
    Type: Application
    Filed: September 24, 2008
    Publication date: March 25, 2010
    Inventors: John H. Spears, Wayne E. Smith, Chenggang Sui, Yongfei Zhu
  • Patent number: 7154357
    Abstract: A phase shifter includes a substrate, a tunable dielectric film having a dielectric constant between 70 to 600, a tuning range of 20 to 60%, and a loss tangent between 0.008 to 0.03 at K and Ka bands positioned on a surface of the substrate, a coplanar waveguide positioned on a surface of the tunable dielectric film opposite the substrate, an input for coupling a radio frequency signal to the coplanar waveguide, an output for receiving the radio frequency signal from the coplanar waveguide, and a connection for applying a control voltage to the tunable dielectric film. A reflective termination coplanar waveguide phase shifter including a substrate, a tunable dielectric film having a dielectric constant between 70 to 600, a tuning range of 20 to 60%, and a loss tangent between 0.008 to 0.
    Type: Grant
    Filed: December 9, 2004
    Date of Patent: December 26, 2006
    Assignee: Paratek Microwave, Inc.
    Inventors: Andrey Kozyrev, Louise C. Sengupta, Yongfei Zhu
  • Patent number: 7145415
    Abstract: This invention provides a voltage tunable filter comprising an input connection point, an output connection point, and at least one circuit branch electrically coupled to the input connection point and the output connection point and including a voltage tunable dielectric varactor electrically connected to an inductor. The voltage tunable filter can be one of a low-pass, high-pass, band-pass, or band-stop filter. The varactor can include built-in DC blocking capacitors.
    Type: Grant
    Filed: November 1, 2004
    Date of Patent: December 5, 2006
    Assignee: Paratek Microwave, Inc.
    Inventors: Louise C. Sengupta, Steven C. Stowell, Yongfei Zhu, Somnath Sengupta, Luna H. Chiu, Xubai Zhang
  • Patent number: 7034636
    Abstract: An apparatus for reducing influence by selected signal components in a communication link includes a first signal line conveying a first communication signal including a desired signal component and at least one undesired signal component; a second signal line conveying a second communication signal substantially including at least the at least one undesired signal component; a signal treating unit coupled with the second signal line for affecting at least one parameter associated with the second communication signal to present a modified second communication signal at a first output locus coupled for combining the modified second communication signal with the first communication signal to present an improved communication signal at a second output locus. The at least one undesired signal component affects the improved communication signal less than the at least one undesired signal component affects the first communication signal.
    Type: Grant
    Filed: August 5, 2004
    Date of Patent: April 25, 2006
    Assignee: Paratek Microwave Incorporated
    Inventors: Khosro Shamsaifar, Yongfei Zhu, John Kvarnstrand, Louise Sengupta
  • Publication number: 20060033593
    Abstract: An embodiment of the present invention provides an apparatus, comprising a varactor; and at least one external high-Q fixed capacitors combined with the varactor thereby improving the Q of the varactor. The at least one external high-Q fixed capacitor may combined in series with the varactor or in parallel with the varactor. Further, the varactor may be constructed of an internal low-tuning high-Q material with high-Q and large capacitance but low tuning range. The apparatus of one embodiment of the present invention may be incorporated into a 4-pole bandpass filter enabling Q improvement on the circuit performance or also may be incorporated into an amplifier or a voltage controlled oscillators or a phase shifters. Another embodiment of the present invention provides an apparatus, comprising a resonator and a varactor variably coupled into the resonator through an RF transformer, wherein by varying a coupling factor, the Q-factor and the tunability of the apparatus is capable of being affected.
    Type: Application
    Filed: August 8, 2005
    Publication date: February 16, 2006
    Inventors: Qinghua Kang, Nicolaas Toit, Yongfei Zhu
  • Publication number: 20060006966
    Abstract: An embodiment of the present invention provides a voltage-controlled tunable filter, comprising a tunable ridged waveguide filter formed from a first ridged waveguide cavity coupled to a second ridged waveguide cavity thereby forming a resonator; and one or more tunable capacitors in at least one of said first or second waveguide cavity. The coupling between said first ridged waveguide and said second ridged waveguide may be via a coupling iris or ridged post and the one or more tunable capacitors may comprise a low loss tunable dielectric material and metallic electrodes with predetermined shape, size, and distance. In an embodiment of the present invention the one or more tunable capacitors may be MEMS tunable capacitors that are either parallel plate or interdigital topology.
    Type: Application
    Filed: June 16, 2005
    Publication date: January 12, 2006
    Inventors: Qinghua Kang, Nicolaas DuToit, Rousslan Goulouev, Yongfei Zhu