Patents by Inventor Quan Xue

Quan Xue 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).

  • Patent number: 9419347
    Abstract: A circularly polarized antenna exhibiting a high performance characteristic can be produced by utilizing a ground plane, a half-loop, and an electric dipole in a predetermined configuration. The circularly polarized antenna can provide benefits, such as wide axial ratio bandwidth, high gain, and simple structure, over other unidirectional circularly polarized antennas.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: August 16, 2016
    Assignee: CITY UNIVERSITY OF HONG KONG
    Inventors: Quan Xue, Shaowei Liao, Peng Wu
  • Publication number: 20160141742
    Abstract: A low loss and compact power divider/combiner is provided for high power efficiency. The power divider/combiner can be an N-way coaxial-waveguide cavity power divider/combiner with good characteristics of low loss and compact size. The power divider/combiner can be comprised of a coaxial common port, a radial-waveguide cavity, and N-way probe outputs. In various embodiments, the power divider/combiner can have a plurality of probe outputs that are equally spaced radially around an axis on which the coaxial common port is located. The radial-waveguide cavity and N-way probe outputs can be fabricated on a substrate board using printed circuit technology. In addition, the power divider/combiner can have reversed probe outputs which provide for 180 degree out of phase outputs between the probe outputs.
    Type: Application
    Filed: November 17, 2014
    Publication date: May 19, 2016
    Inventors: Quan XUE, Peng WU
  • Patent number: 9270234
    Abstract: A system and method for operating a power amplifier comprising the steps of determining a first impedance generated by a first amplifier component of the power amplifier, determining a second impedance generated by a second amplifier component of the power amplifier, and, adjusting the first impedance or the second impedance to an optimal impedance condition by altering a current ratio of a current delivered by the first amplifier component and a current delivered by the second amplifier component.
    Type: Grant
    Filed: August 22, 2013
    Date of Patent: February 23, 2016
    Assignee: City University of Hong Kong
    Inventors: Quan Xue, Shichang Chen
  • Publication number: 20150364803
    Abstract: Electromagnetic (EM) mode transition or transducer structures and related devices, techniques, and methods are described. An exemplary EM mode transition or transducer structure can comprise a waveguide cavity section configured to transmit a transverse electric mode 20 (TE20) mode of the EM waves. An exemplary EM mode transition can further comprise a fundamental mode rejection section configured to suppress or reflect a transverse electric mode 10 (TE10 mode) and a transverse electric mode 30 (TE30) mode of the EM waves.
    Type: Application
    Filed: June 13, 2014
    Publication date: December 17, 2015
    Inventors: Quan XUE, Peng WU
  • Publication number: 20150349435
    Abstract: A circularly polarized antenna exhibiting a high performance characteristic can be produced by utilizing a ground plane, a half-loop, and an electric dipole in a predetermined configuration. The circularly polarized antenna can provide benefits, such as wide axial ratio bandwidth, high gain, and simple structure, over other unidirectional circularly polarized antennas.
    Type: Application
    Filed: May 27, 2014
    Publication date: December 3, 2015
    Applicant: City University of Hong Kong
    Inventors: Quan XUE, Shaowei LIAO, Peng WU
  • Publication number: 20150333726
    Abstract: An apparatus and a method for electromagnetic signal transition, comprising the steps of receiving an electromagnetic signal having a first physical characteristic arranged to be compatible for the electromagnetic signal to be transmitted on a transmission structure, and transmitting the electromagnetic signal to a substrate integrated waveguide, wherein during the transmission of the electromagnetic signal to the substrate integrated waveguide, the first physical characteristic is converted to a second physical characteristic arranged to be compatible for the electromagnetic signal to be transmitted on the substrate integrated waveguide.
    Type: Application
    Filed: May 16, 2014
    Publication date: November 19, 2015
    Inventors: Quan Xue, Peng Wu
  • Patent number: 9124217
    Abstract: A power amplifier comprising a plurality of primary amplifying channels arranged to each receive an input signal from one or more signal sources for generating a primary amplified output in each of the plurality of primary amplifying channels, a secondary amplifying channel in communication with the one or more signal sources wherein the secondary amplifying channel is arranged to receive one or more signal components each associated with the input signal received by each of the plurality of primary amplifying channels to form a merged input signal for generating a secondary amplified output, and an electric junction arrangement being in electrical communication with the primary amplified output of each of the primary amplifying channels and the secondary amplified output of the secondary amplifying channel.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: September 1, 2015
    Assignee: City University of Hong Kong
    Inventors: Quan Xue, Shichang Chen
  • Patent number: 9083086
    Abstract: An antenna is disclosed as including at least one dipole connected with at least one shorted patch antenna, and at least two feeding sources.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: July 14, 2015
    Assignee: CITY UNIVERSITY OF HONG KONG
    Inventors: Chi Hou Chan, Hang Wong, Hau Wah Lai, Kwok Kan So, Kwai Man Luk, Quan Xue
  • Publication number: 20150022284
    Abstract: A microstrip line filter comprising a coupling mechanism arranged to couple a first resonator and a second resonator, wherein the coupling mechanism includes a shared metallic coupling member arranged to have a predetermined dimension associated with an operation characteristics of the first and second resonators.
    Type: Application
    Filed: May 29, 2014
    Publication date: January 22, 2015
    Inventors: Quan Xue, Wei Qin
  • Publication number: 20140340157
    Abstract: A power amplifier comprising a plurality of primary amplifying channels arranged to each receive an input signal from one or more signal sources for generating a primary amplified output in each of the plurality of primary amplifying channels, a secondary amplifying channel in communication with the one or more signal sources wherein the secondary amplifying channel is arranged to receive one or more signal components each associated with the input signal received by each of the plurality of primary amplifying channels to form a merged input signal for generating a secondary amplified output, and an electric junction arrangement being in electrical communication with the primary amplified output of each of the primary amplifying channels and the secondary amplified output of the secondary amplifying channel.
    Type: Application
    Filed: May 15, 2013
    Publication date: November 20, 2014
    Inventors: Quan Xue, Shichang Chen
  • Patent number: 8854161
    Abstract: The present invention provides a wideband frequency tunable ring resonator, wherein, comprises a closed ?g/2 transmission line and two variable capacitors with tunable capacitance, the ?g/2 transmission line is axisymmetric around a central line, first ends of the two variable capacitors are respectively connected to two intersection points of the ?g/2 transmission line and the central line, the second ends of the two variable capacitors are respectively grounded. By implementing the technical solution of present invention, following technical effects are obtained. The fundamental resonant frequency (ffund) can be shifted up and down by controlling the respective values of the two loading capacitors, resulting in a bi-directional tuning of ffund. As a result, the tuning range of this invention can be approximately doubled as compared with the conventional tunable ring resonator.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: October 7, 2014
    Assignee: Nantong University
    Inventors: Jian Xin Chen, Li Heng Zhou, Hui Tang, Zhi Hua Bao, Yong Jie Yang, Quan Xue
  • Publication number: 20140266959
    Abstract: A patch antenna is disclosed as comprising a circular patch and a circular ground plane. The patch and the ground plane are spaced apart from each other by a substrate made of a dielectric material, with the antenna being shorted concentrically by a certain number of conductive vias.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: CITY UNIVERSITY OF HONG KONG
    Inventors: Quan XUE, Juhua LIU
  • Publication number: 20140266960
    Abstract: A patch antenna is disclosed as including a rectangular patch and a rectangular ground plane parallel to and spaced apart from the patch by a sheet of dielectric material. The patch has a first longer side and a second longer side which are opposite to each other and a first shorter side and a second shorter side which are opposite to each other. A first row of vias is provided adjacent the first longer side of the patch, a second row of vias being provided adjacent the second longer side of the patch, a third row of vias being provided adjacent the first shorter side of the patch, and a fourth row of vias being provided adjacent the second shorter side of the patch. Each via extends through the patch, the sheet of dielectric material and the ground plane to short the antenna.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: CITY UNIVERSITY OF HONG KONG
    Inventors: Quan XUE, Juhua LIU
  • Publication number: 20140097986
    Abstract: A system for controlling a multi-element antenna array comprising a plurality of elements each arranged to receive a signal from a signal source, wherein each of the plurality of elements includes a frequency locking module arranged to lock the frequency of the signal received by each of the elements, and, a phase control module being in communication with each of the frequency locking modules to control the phase of the signal received by each of the elements.
    Type: Application
    Filed: August 22, 2013
    Publication date: April 10, 2014
    Inventors: Quan Xue, Chengcheng Tang
  • Publication number: 20140071006
    Abstract: An antenna is disclosed as including at least one dipole connected with at least one shorted patch antenna, and at least two feeding sources.
    Type: Application
    Filed: September 12, 2012
    Publication date: March 13, 2014
    Applicant: CITY UNIVERSITY OF HONG KONG
    Inventors: Chi Hou CHAN, Hang WONG, Hau Wah LAI, Kwok Kan SO, Kwai Man LUK, Quan XUE
  • Publication number: 20140062603
    Abstract: A system and method for operating a power amplifier comprising the steps of determining a first impedance generated by a first amplifier component of the power amplifier, determining a second impedance generated by a second amplifier component of the power amplifier, and, adjusting the first impedance or the second impedance to an optimal impedance condition by altering a current ratio of a current delivered by the first amplifier component and a current delivered by the second amplifier component.
    Type: Application
    Filed: August 22, 2013
    Publication date: March 6, 2014
    Inventors: Quan Xue, Shichang Chen
  • Publication number: 20140055216
    Abstract: A transmission line comprising a transmission medium defined by a plurality of dielectric layers, wherein the dielectric layers include a first layer having a first dielectric constant, a second layer having a second dielectric constant and a third layer having a third dielectric constant being less than the first and second dielectric constant.
    Type: Application
    Filed: August 22, 2013
    Publication date: February 27, 2014
    Inventors: Quan Xue, Leung Chiu
  • Patent number: 8624545
    Abstract: The present invention provides a portable electronic device including an antenna having a major planar cross-section, and a power transfer coil having windings parallel to a coil plane, the coil plane extending to the perimeter of the power transfer coil. The antenna and the power transfer coil are arranged such that the major planar cross-section is substantially perpendicular to the coil plane if a line directed perpendicularly from the coil plane intersects the major planar cross-section. An associated method of assembling a portable electronic device is also provided.
    Type: Grant
    Filed: October 9, 2009
    Date of Patent: January 7, 2014
    Assignee: Convenientpower HK Ltd
    Inventors: Shu Yuen Ron Hui, Quan Xue, Kwun Chiu Wan
  • Publication number: 20130202146
    Abstract: There is provided an electronic apparatus having a main body, an ear phone and a connection cable with a substantial length for connecting the ear phone to the main body. The apparatus is provided with a device to releasably secure the earphone and/or the connection cable to the apparatus to minimize the connection cable from tangling up, and wherein the securing device has i) a mounting means having a surrounding wall defining a first cavity with a width slightly larger than the width of the connection cable for releasably mounting a section of the connection cable to the apparatus and/or ii) a recess for releasably securing the ear phone to the apparatus.
    Type: Application
    Filed: February 6, 2012
    Publication date: August 8, 2013
    Applicant: CITY UNIVERSITY OF HONG KONG
    Inventor: Quan XUE
  • Patent number: 8301077
    Abstract: The Present Invention Provides an Antenna Network for Passively or Actively enhancing signal transmission or reception of one or more portable transceiver devices. The antenna network includes one or more antennas, each having a coupling portion and a radiating portion, the coupling portion being distributed across a coupling area and the radiating portion being located away from the coupling area, whereby signal transmission or reception of the one or more portable transceiver devices can occur through the radiating portion when the one or more portable transceiver devices are located within the coupling area.
    Type: Grant
    Filed: September 24, 2009
    Date of Patent: October 30, 2012
    Assignee: ConvenientPower, Ltd
    Inventors: Quan Xue, Shu Yuen Ron Hui, Kwun Chiu Wan