Patents by Inventor Chi Hou Chan
Chi Hou Chan 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: 11942707Abstract: An antenna includes, from top to bottom and bonded together, an upper substrate, a bonding film, a ground plane and a lower substrate. A parasitic patch arrangement and two pairs of radiator arms associated therewith are arranged on an upper surface of the upper substrate. One radiator arm pair are responsive to a differential signal received through respective vias, which extend through the upper substrate, and respective feed lines, which are arranged on a lower surface of the upper substrate, to emit a first radio frequency signal. The other radiator arm pair are responsive to another differential signal received through respective vias, which extend through the substrates, and respective feed lines, which are arranged on a lower surface of the lower substrate, to emit a second radio frequency signal orthogonal to the first radio frequency signal. A gap between one radiator arm pair intersects that between the other pair.Type: GrantFiled: June 26, 2022Date of Patent: March 26, 2024Assignee: City University of Hong KongInventors: Chi Hou Chan, Manting Wang
-
Patent number: 11909115Abstract: The present invention relates to a novel lens antenna with a 3D near-field focus-steering capability that operates at gigahertz and terahertz frequencies. The novel antenna includes a pair of discrete dielectric lenses fed by a stationary horn source. In-plane synchronous counter-rotation and co-rotation of the lens pair steers its near-field focus radially and azimuthally, respectively, while linear translation of the upper lens moves the focal point longitudinally. The steering focus beam enables fast imaging. In imaging applications, the radiated beam from the novel lens antenna focused in the target area can reduce undesired interference from neighboring structures and increase the system dynamic range and signal-to-noise ratio.Type: GrantFiled: June 4, 2021Date of Patent: February 20, 2024Assignee: City University of Hong KongInventors: Chi Hou Chan, Ka Fai Chan, Gengbo Wu
-
Patent number: 11909112Abstract: A self-filtering, space-time coding, waveguide-driven metasurface antenna includes at least first and second metal layers, and first dielectric layer between the first and second metal layers. A series of vias is formed in the first dielectric layer. A substrate integrated waveguide (SIW) is formed from the first and second metal layers and from the metal vias in the first dielectric layer. A series of meta-atoms is formed in the first metal layer, each meta-atom including a slot cooperating with two switching elements for switching the meta-atom between an on and off state. Each meta-atom behaves as a magnetic dipole antenna element that radiates electromagnetic waves into free space. In this manner, the propagating guided waves inside the substrate integrated waveguide are converted and molded into arbitrary selected out-of-plane free-space waves in both a frequency domain and a momentum domain.Type: GrantFiled: June 24, 2022Date of Patent: February 20, 2024Assignee: City University of Hong KongInventors: Gengbo Wu, Junyan Dai, Chi Hou Chan
-
Publication number: 20240014562Abstract: A radiator for terahertz electromagnetic radiation. The radiator includes one or more radiator units. Each radiator unit includes an oscillator operable to generate second harmonic power, and a patch antenna operably coupled with the oscillator for radiating terahertz electromagnetic radiation based on the generated second harmonic power.Type: ApplicationFiled: July 8, 2022Publication date: January 11, 2024Inventors: Liang Gao, Chi Hou Chan
-
Publication number: 20230420861Abstract: A self-filtering, space-time coding, waveguide-driven metasurface antenna includes at least first and second metal layers, and first dielectric layer between the first and second metal layers. A series of vias is formed in the first dielectric layer. A substrate integrated waveguide (SIW) is formed from the first and second metal layers and from the metal vias in the first dielectric layer. A series of meta-atoms is formed in the first metal layer, each meta-atom including a slot cooperating with two switching elements for switching the meta-atom between an on and off state. Each meta-atom behaves as a magnetic dipole antenna element that radiates electromagnetic waves into free space. In this manner, the propagating guided waves inside the substrate integrated waveguide are converted and molded into arbitrary selected out-of-plane free-space waves in both a frequency domain and a momentum domain.Type: ApplicationFiled: June 24, 2022Publication date: December 28, 2023Inventors: Gengbo WU, Junyan DAI, Chi Hou CHAN
-
Publication number: 20230420853Abstract: An antenna includes, from top to bottom and bonded together, an upper substrate, a bonding film, a ground plane and a lower substrate. A parasitic patch arrangement and two pairs of radiator arms associated therewith are arranged on an upper surface of the upper substrate. One radiator arm pair are responsive to a differential signal received through respective vias, which extend through the upper substrate, and respective feed lines, which are arranged on a lower surface of the upper substrate, to emit a first radio frequency signal. The other radiator arm pair are responsive to another differential signal received through respective vias, which extend through the substrates, and respective feed lines, which are arranged on a lower surface of the lower substrate, to emit a second radio frequency signal orthogonal to the first radio frequency signal. A gap between one radiator arm pair intersects that between the other pair.Type: ApplicationFiled: June 26, 2022Publication date: December 28, 2023Inventors: Chi Hou CHAN, Manting WANG
-
Patent number: 11848499Abstract: An on-chip antenna comprising an electrically insulating substrate having first and second faces; a metal layer arranged on the second face; and, a dipole antenna structure arranged on the first face, the dipole antenna structure comprising a dipole antenna and a feed structure connected to the dipole antenna; the on-chip antenna being configured such that when the feed structure is fed with an electrical signal it operates simultaneously in (i) at least one dielectric resonator mode to function as a dielectric resonance antenna, and (ii) at least one dipole mode to function as a cavity backed dipole antenna.Type: GrantFiled: May 28, 2021Date of Patent: December 19, 2023Assignee: CITY UNIVERSITY OF HONG KONGInventors: Chi Hou Chan, Shang Cheng Kong, Kam Man Shum
-
Patent number: 11817630Abstract: The present invention provides wideband millimeter-wave SIW-fed FPC filtering antenna comprising a partially reflecting surface (PRS) and a filtering source configured to radiate a millimeter-wavelength electromagnetic wave. The filtering source comprises a conductive reflecting plane configured to work with the PRS to form a Fabry-Perot cavity; radiating elements including a pair of shorted radiating patches electrically connected to a ground plane through a pair of probes; and a substrate integrated waveguide (SIW) feeding structure coupled to the pair of radiating patches through a coupling aperture. The SIW-fed FPC filtering antenna has the advantages of wider bandwidth, higher directivity/gain, reduced structural complexity, compact size and appropriate feeding type for millimeter-wave applications.Type: GrantFiled: September 17, 2021Date of Patent: November 14, 2023Assignee: City University of Hong KongInventors: Haotao Hu, Chi Hou Chan
-
Patent number: 11782212Abstract: A guided-wave-driven metasurface antenna includes an input for receiving a guided wave; an output for outputting a free-space wave; and a spatial frequency mixer connected between the input and the output for converting the guided wave to the free-space wave. The spatial frequency mixer is implemented by a metasurface of the antenna. The superheterodyne metasurface can be fabricated with high accuracy using lithography step similar to conventional waveguides made by the well-established semiconductor processing technology, making their integration with PICs straightforward.Type: GrantFiled: May 13, 2022Date of Patent: October 10, 2023Assignee: City University of Hong KongInventors: Gengbo Wu, Shuyan Zhu, Stella W. Pang, Chi Hou Chan
-
Patent number: 11670862Abstract: A device for signal generation including a unit cell. The unit cell contains two oscillators that are coupled in phase. Each oscillator operates at a fundamental frequency. Each oscillator further includes a slot structure, and the slot structures serve as, at a third harmonic of the fundamental frequency, a slot antenna radiating a third harmonic power. If the device contains multiple unit cell, then each unit cell is horizontally coupled out-of-phase and vertically in-phase with adjacent cells at the fundamental frequency in the device. Therefore, coherent radiation and power combining are achieved at the third harmonic.Type: GrantFiled: May 31, 2022Date of Patent: June 6, 2023Assignee: City University of Hong KongInventors: Liang Gao, Chi Hou Chan
-
Publication number: 20230092871Abstract: The present invention provides wideband millimeter-wave SIW-fed FPC filtering antenna comprising a partially reflecting surface (PRS) and a filtering source configured to radiate a millimeter-wavelength electromagnetic wave. The filtering source comprises a conductive reflecting plane configured to work with the PRS to form a Fabry-Perot cavity; radiating elements including a pair of shorted radiating patches electrically connected to a ground plane through a pair of probes; and a substrate integrated waveguide (SIW) feeding structure coupled to the pair of radiating patches through a coupling aperture. The SIW-fed FPC filtering antenna has the advantages of wider bandwidth, higher directivity/gain, reduced structural complexity, compact size and appropriate feeding type for millimeter-wave applications.Type: ApplicationFiled: September 17, 2021Publication date: March 23, 2023Inventors: Haotao HU, Chi Hou CHAN
-
Patent number: 11611149Abstract: A leaky-wave antenna includes a substrate extending along an axis, and a dielectric waveguide extending along the axis and arranged in the substrate. The dielectric waveguide includes at least a top side, a bottom side, and opposite sides arranged between the top and bottom sides. A distance defined between the opposite sides varies along the axis for at least part of a length of the dielectric waveguide.Type: GrantFiled: June 25, 2021Date of Patent: March 21, 2023Assignee: City University of Hong KongInventors: Chi Hou Chan, Gengbo Wu, Ka Fai Chan
-
Patent number: 11575212Abstract: A substrate integrated waveguide fed antenna includes an electric dipole arrangement, a parasitic patch arrangement operably coupled with the electric dipole arrangement, and a feed structure. The feed structure includes a substrate integrated waveguide operably coupled with the electric dipole arrangement for exciting the electric dipole arrangement. A slotted conductive surface with a slot is arranged between the electric dipole arrangement and the feed structure for operably coupling the feed structure with the electric dipole arrangement.Type: GrantFiled: June 1, 2021Date of Patent: February 7, 2023Assignee: City University of Hong KongInventors: Chi Hou Chan, Manting Wang
-
Patent number: 11575206Abstract: The present invention provides a self-filtering millimeter-wave wideband multilayer planar antenna. The antenna includes a first layer having a slot feed. A second layer includes at least a pair of probes fed by the slot feed from the first layer. A third layer includes at least two substantially planar radiating patches each patch respectively coupled to one of the probes on the second layer. The radiating patches are arranged to radiate a millimeter-wavelength electromagnetic wave when the slot feed receives excitation energy and transmits the energy to the radiating patch through the respective probe. The self-filtering antenna does not require a resonant cavity structure coupled to the radiating patches. Antenna arrays of arbitrary numbers of antenna elements may be constructed from the self-filtering antenna. Such arrays are particularly suitable for 5G mm-wave backhaul communications.Type: GrantFiled: June 18, 2021Date of Patent: February 7, 2023Assignee: City University of Hong KongInventors: Haotao Hu, Chi Hou Chan
-
Publication number: 20220416432Abstract: A leaky-wave antenna includes a substrate extending along an axis, and a dielectric waveguide extending along the axis and arranged in the substrate. The dielectric waveguide includes at least a top side, a bottom side, and opposite sides arranged between the top and bottom sides. A distance defined between the opposite sides varies along the axis for at least part of a length of the dielectric waveguide.Type: ApplicationFiled: June 25, 2021Publication date: December 29, 2022Inventors: Chi Hou Chan, Gengbo Wu, Ka Fai Chan
-
Patent number: 11283405Abstract: An oscillator circuit includes a core stage having a voltage controlled oscillator arranged to output an output oscillation signal, and an input stage coupled to the output stage via an induction coupling, and arranged to receive an input oscillation signal; wherein the output oscillation signal includes an output oscillation frequency substantially equals to a multiplication of an input oscillation frequency of the input oscillation signal.Type: GrantFiled: July 17, 2020Date of Patent: March 22, 2022Assignee: City University of Hong KongInventors: Chi Hou Chan, Hai Feng Zhou, Kam Man Shum
-
Patent number: 11271322Abstract: A substrate integrated waveguide fed antenna. The antenna includes an electric dipole, a parasitic patch arrangement operably coupled with the electric dipole, and a feed structure. The feed structure includes a substrate integrated waveguide operably coupled with the electric dipole for exciting the electric dipole. A slotted conductive surface with a slot is arranged between the electric dipole and the feed structure for operably coupling the feed structure with the electric dipole.Type: GrantFiled: June 1, 2020Date of Patent: March 8, 2022Assignee: City University of Hong KongInventors: Chi Hou Chan, Manting Wang
-
Publication number: 20220021337Abstract: An oscillator circuit includes a core stage having a voltage controlled oscillator arranged to output an output oscillation signal, and an input stage coupled to the output stage via an induction coupling, and arranged to receive an input oscillation signal; wherein the output oscillation signal includes an output oscillation frequency substantially equals to a multiplication of an input oscillation frequency of the input oscillation signal.Type: ApplicationFiled: July 17, 2020Publication date: January 20, 2022Inventors: Chi Hou Chan, Hai Feng Zhou, Kam Man Shum
-
Publication number: 20210399427Abstract: The present invention provides a self-filtering millimeter-wave wideband multilayer planar antenna. The antenna includes a first layer having a slot feed. A second layer includes at least a pair of probes fed by the slot feed from the first layer. A third layer includes at least two substantially planar radiating patches each patch respectively coupled to one of the probes on the second layer. The radiating patches are arranged to radiate a millimeter-wavelength electromagnetic wave when the slot feed receives excitation energy and transmits the energy to the radiating patch through the respective probe. The self-filtering antenna does not require a resonant cavity structure coupled to the radiating patches. Antenna arrays of arbitrary numbers of antenna elements may be constructed from the self-filtering antenna. Such arrays are particularly suitable for 5G mm-wave backhaul communications.Type: ApplicationFiled: June 18, 2021Publication date: December 23, 2021Inventors: Haotao HU, Chi Hou CHAN
-
Publication number: 20210384638Abstract: The present invention relates to a novel lens antenna with a 3D near-field focus-steering capability that operates at gigahertz and terahertz frequencies. The novel antenna includes a pair of discrete dielectric lenses fed by a stationary horn source. In-plane synchronous counter-rotation and co-rotation of the lens pair steers its near-field focus radially and azimuthally, respectively, while linear translation of the upper lens moves the focal point longitudinally. The steering focus beam enables fast imaging. In imaging applications, the radiated beam from the novel lens antenna focused in the target area can reduce undesired interference from neighboring structures and increase the system dynamic range and signal-to-noise ratio.Type: ApplicationFiled: June 4, 2021Publication date: December 9, 2021Inventors: Chi Hou CHAN, Ka Fai CHAN, Gengbo WU