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: 9847784
    Abstract: Transistors can be used for a variety of electronic-based applications. Therefore, transistor efficiency and performance is of importance. An apparatus is presented herein to increase the locking range of transistors by leveraging cross-coupled injection transistors in conjunction with symmetry injection transistors. The transistor efficiency can also be increase by reducing a parasitic capacitance associated with the components of the transistor.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: December 19, 2017
    Assignee: CITY UNIVERSITY OF HONG KONG
    Inventors: Quan Xue, Haifeng Zhou, Kam Man Shum
  • Patent number: 9843082
    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: Grant
    Filed: May 29, 2014
    Date of Patent: December 12, 2017
    Assignee: City University of Hong Kong
    Inventors: Quan Xue, Wei Qin
  • Publication number: 20170331193
    Abstract: An antenna (e.g., circularly polarized (CP) planar aperture antenna) is presented herein. An antenna can include an opening cavity and a patch section within a perimeter of the opening cavity. The patch section can have crossed patch in a windmill shape. The opening cavity can have a windmill shape. The patch section can be fed differentially via grounded co-planar waveguide (GCPW). The antenna can be formed in a single layer substrate and can be 180° rotationally symmetric about its center. A height of the opening cavity can be quarter-wavelength at operating frequency and a diameter of the opening cavity can be larger than one wavelength at operating frequency.
    Type: Application
    Filed: May 16, 2016
    Publication date: November 16, 2017
    Inventors: Quan XUE, Shaowei LIAO, Dia'aaldin J. BISHARAT
  • Patent number: 9813042
    Abstract: A single-ended signal can be converted to a differential signal or reverse. A printed circuit board component can comprise a bottom metal layer and a top metal layer, wherein the bottom metal layer is connected to the top metal layer by an array of metal posts, and wherein the array of metal posts is arranged to form a substrate integrated waveguide network configured to transmit a set of electromagnetic waves corresponding to a single-ended signal represented according to a bandwidth. Furthermore, in an aspect, the device can comprise a coaxial to waveguide adaptor component comprising a coaxial cable port portion and a waveguide port portion, wherein the waveguide port portion guides the set of electromagnetic waves to the substrate integrated waveguide network.
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: November 7, 2017
    Assignee: CITY UNIVERSITY OF HONG KONG
    Inventors: Quan Xue, Shaowei Liao
  • Publication number: 20170294886
    Abstract: Amplifiers can be used for a variety of electronic-based applications. Therefore, amplifier performance is of importance. A low noise amplifier can be interfaced after an antenna or a band-select filter as a first active stage, in a receiver since its bandwidth characteristics can be closely related to a system data rate. A bandwidth enhancement technique can be leverage for low noise amplifiers by embedding a transformer between a gate and a drain terminal of a common gate transistor in a cascode topology. The embedded transformer can introduce an additional high-frequency conjugate zero pair, which can push the gain rolling-off start-up point to a higher frequency, peak the higher frequency gain, and broaden the low noise amplifier gain bandwidth.
    Type: Application
    Filed: April 12, 2016
    Publication date: October 12, 2017
    Inventors: Quan XUE, Pei QIN, Kam Man SHUM
  • Patent number: 9755290
    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: Grant
    Filed: June 13, 2014
    Date of Patent: September 5, 2017
    Assignee: CITY UNIVERSITY OF HONG KONG
    Inventors: Quan Xue, Peng Wu
  • Publication number: 20170237176
    Abstract: A planar differential aperture antenna that has a high gain and wide bandwidth at a millimeter wave band is provided. The differential aperture antenna has a cavity within it that has a height of roughly a quarter of a wavelength of the desired transmission band. The cavity is H-shaped, and has a cross shaped patch within the cavity that is fed differentially by two grounded coplanar waveguides. Two ends of the patch extend towards the ports on either side of the differential aperture antenna, and the other two ends of the patch extend into the cavity lobes, perpendicular with respect to the ports.
    Type: Application
    Filed: February 27, 2017
    Publication date: August 17, 2017
    Inventors: Quan XUE, Shaowei LIAO, Peng WU
  • Publication number: 20170149438
    Abstract: Transistors can be used for a variety of electronic-based applications. Therefore, transistor efficiency and performance is of importance. An apparatus is presented herein to increase the locking range of transistors by leveraging cross-coupled injection transistors in conjunction with symmetry injection transistors. The transistor efficiency can also be increase by reducing a parasitic capacitance associated with the components of the transistor.
    Type: Application
    Filed: February 6, 2017
    Publication date: May 25, 2017
    Inventors: Quan Xue, Haifeng Zhou, Kam Man Shum
  • Patent number: 9634618
    Abstract: An impedance matching arrangement for an amplifier includes first and second metallic transmission lines arranged on a ground plane, the first metallic transmission line being connected with a first power amplification stage of the amplifier, the second metallic transmission line being connected with a second power amplification stage of the amplifier; wherein the first and second metallic transmission lines are electrically coupled for transmitting an RF signal amplified by the first power amplification stage to the second power amplification stage.
    Type: Grant
    Filed: July 20, 2015
    Date of Patent: April 25, 2017
    Assignee: City University of Hong Kong
    Inventors: Quan Xue, Haiwai Zhang, Kam Man Shum
  • Patent number: 9608741
    Abstract: A system and method of an electronic apparatus for use in a communication system includes a switching module arranged to combine a plurality of input signals received by a plurality of input ports in connection with the switching module to define a combined input signal having a plurality of frequency components; and a loading module arranged to receive the combined input signal from the switching module and to individually separate each of the plurality of frequency components of the combined input signal by processing the combined input signal with a plurality of resonating networks, each arranged to resonate at a resonance frequency associated with each of the plurality of frequency components of the combined input signals.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: March 28, 2017
    Assignee: City University of Hong Kong
    Inventors: Quan Xue, Wai Lun Lam, Kam Man Shum
  • Patent number: 9595607
    Abstract: Transistors can be used for a variety of electronic-based applications. Therefore, transistor efficiency and performance is of importance. An apparatus is presented herein to increase the locking range of transistors by leveraging cross-coupled injection transistors in conjunction with symmetry injection transistors. The transistor efficiency can also be increase by reducing a parasitic capacitance associated with the components of the transistor.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: March 14, 2017
    Assignee: CITY UNIVERSITY OF HONG KONG
    Inventors: Quan Xue, Haifeng Zhou, Kam Man Shum
  • Publication number: 20170062896
    Abstract: A single-ended signal can be converted to a differential signal or reverse. A printed circuit board component can comprise a bottom metal layer and a top metal layer, wherein the bottom metal layer is connected to the top metal layer by an array of metal posts, and wherein the array of metal posts is arranged to form a substrate integrated waveguide network configured to transmit a set of electromagnetic waves corresponding to a single-ended signal represented according to a bandwidth. Furthermore, in an aspect, the device can comprise a coaxial to waveguide adaptor component comprising a coaxial cable port portion and a waveguide port portion, wherein the waveguide port portion guides the set of electromagnetic waves to the substrate integrated waveguide network.
    Type: Application
    Filed: October 28, 2015
    Publication date: March 2, 2017
    Inventors: Quan XUE, Shaowei LIAO
  • Publication number: 20170063472
    Abstract: A system and method of an electronic apparatus for use in a communication system includes a switching module arranged to combine a plurality of input signals received by a plurality of input ports in connection with the switching module to define a combined input signal having a plurality of frequency components; and a loading module arranged to receive the combined input signal from the switching module and to individually separate each of the plurality of frequency components of the combined input signal by processing the combined input signal with a plurality of resonating networks, each arranged to resonate at a resonance frequency associated with each of the plurality of frequency components of the combined input signals.
    Type: Application
    Filed: September 2, 2015
    Publication date: March 2, 2017
    Inventors: Quan Xue, Wai Lun Lam, Kam Man Shum
  • Patent number: 9583837
    Abstract: A planar differential aperture antenna that has a high gain and wide bandwidth at a millimeter wave band is provided. The differential aperture antenna has a cavity within it that has a height of roughly a quarter of a wavelength of the desired transmission band. The cavity is H-shaped, and has a cross shaped patch within the cavity that is fed differentially by two grounded coplanar waveguides. Two ends of the patch extend towards the ports on either side of the differential aperture antenna, and the other two ends of the patch extend into the cavity lobes, perpendicular with respect to the ports.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: February 28, 2017
    Assignee: CITY UNIVERSITY OF HONG KONG
    Inventors: Quan Xue, Shaowei Liao, Peng Wu
  • Publication number: 20170033211
    Abstract: Transistors can be used for a variety of electronic-based applications. Therefore, transistor efficiency and performance is of importance. An apparatus is presented herein to increase the locking range of transistors by leveraging cross-coupled injection transistors in conjunction with symmetry injection transistors. The transistor efficiency can also be increase by reducing a parasitic capacitance associated with the components of the transistor.
    Type: Application
    Filed: July 27, 2015
    Publication date: February 2, 2017
    Inventors: Quan Xue, Haifeng Zhou, Kam Man Shum
  • Publication number: 20170026009
    Abstract: An impedance matching arrangement for an amplifier includes first and second metallic transmission lines arranged on a ground plane, the first metallic transmission line being connected with a first power amplification stage of the amplifier, the second metallic transmission line being connected with a second power amplification stage of the amplifier; wherein the first and second metallic transmission lines are electrically coupled for transmitting an RF signal amplified by the first power amplification stage to the second power amplification stage.
    Type: Application
    Filed: July 20, 2015
    Publication date: January 26, 2017
    Inventors: Quan Xue, Haiwai Zhang, Kam Man Shum
  • Patent number: 9509034
    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: Grant
    Filed: November 17, 2014
    Date of Patent: November 29, 2016
    Assignee: CITY UNIVERSITY OF HONG KONG
    Inventors: Quan Xue, Peng Wu
  • Patent number: 9479114
    Abstract: A quadrature voltage controlled oscillator includes a first voltage controlled oscillator having a first current source, a first oscillator circuit, a first tuning circuit, and a first resonator tank; a second voltage controlled oscillator having a second current source, a second oscillator circuit, a second tuning circuit, and a second resonator tank. A first biasing circuit is connected between first and second transistors of the first oscillator circuit to bias them in Class-C mode; and a second biasing circuit is connected between third and fourth transistors of the second oscillator circuit to bias them in Class-C mode. The first and second voltage controlled oscillators are electrically coupled by bulk terminals of the first and second transistors coupled with drain terminals of the third and fourth transistors respectively, and bulk terminals of the third and fourth transistors coupled with drain terminals of the first and second transistors respectively.
    Type: Grant
    Filed: July 20, 2015
    Date of Patent: October 25, 2016
    Assignee: City University of Hong Kong
    Inventors: Quan Xue, Haiwai Zhang, Kam Man Shum
  • Patent number: 9478840
    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: Grant
    Filed: August 22, 2013
    Date of Patent: October 25, 2016
    Assignee: City University of Hong Kong
    Inventors: Quan Xue, Leung Chiu
  • Publication number: 20160240925
    Abstract: A planar differential aperture antenna that has a high gain and wide bandwidth at a millimeter wave band is provided. The differential aperture antenna has a cavity within it that has a height of roughly a quarter of a wavelength of the desired transmission band. The cavity is H-shaped, and has a cross shaped patch within the cavity that is fed differentially by two grounded coplanar waveguides. Two ends of the patch extend towards the ports on either side of the differential aperture antenna, and the other two ends of the patch extend into the cavity lobes, perpendicular with respect to the ports.
    Type: Application
    Filed: February 17, 2015
    Publication date: August 18, 2016
    Inventors: Quan XUE, Shaowei LIAO, Peng WU