Patents by Inventor Yijun Zhou

Yijun Zhou 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: 10381715
    Abstract: An electronic device may include an antenna having a resonating element, an antenna ground, and a feed. First and second tunable components may be coupled to the resonating element. Adjustable matching circuitry may be coupled to the feed. Control circuitry may use the first tunable component to tune a midband antenna resonance when sensor circuitry identifies that the device is being held in a right hand and may use the second tunable component to tune the midband resonance when the sensor circuitry identifies that the device is being held in a left hand. For tuning a low band resonance, the control circuitry may place the antenna in different tuning states by sequentially adjusting a selected one of the matching circuitry and the tunable components, potentially reverting to a previous tuning state at each step in the sequence. This may ensure that antenna efficiency is satisfactory regardless of antenna loading conditions.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: August 13, 2019
    Assignee: Apple Inc.
    Inventors: Liang Han, Thomas E. Biedka, Matthew A. Mow, Iyappan Ramachandran, Mattia Pascolini, Xu Han, Hao Xu, Jennifer M. Edwards, Salih Yarga, Yijun Zhou
  • Patent number: 10367570
    Abstract: An electronic device may be provided with antenna structures and control circuitry. The antenna structures may include an antenna resonating element arm, an antenna ground, and an antenna feed coupled between the antenna resonating element arm and the antenna ground. The electronic device may include a tunable component configured to tune a frequency response of the antenna structures. The electronic device may also include a substrate, a radio-frequency transceiver on the substrate, control circuitry configured to generate control signals, a flexible printed circuit, and a connector. The connector may mechanically secure the flexible printed circuit to the substrate and may be electrically coupled to the transceiver and the control circuitry. The flexible printed circuit may include a radio-frequency transmission line coupled between the antenna feed and the connector and a control signal path coupled between the tunable component and the connector.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: July 30, 2019
    Assignee: Apple Inc.
    Inventors: Yijun Zhou, Yiren Wang, Jennifer M. Edwards, Hao Xu, Ming-Ju Tsai, Mattia Pascolini
  • Patent number: 10355339
    Abstract: Electronic devices may be provided that contain wireless communications circuitry. The wireless communications circuitry may include radio-frequency transceiver circuitry and antenna structures. The antenna structures may form a dual arm inverted-F antenna. The antenna may have a resonating element formed from portions of a peripheral conductive electronic device housing member and may have an antenna ground that is separated from the antenna resonating element by a gap. A short circuit path may bridge the gap. An antenna feed may be coupled across the gap in parallel with the short circuit path. Low band tuning may be provided using an adjustable inductor that bridges the gap. The antenna may have a slot-based parasitic antenna resonating element with a slot formed between portions of the peripheral conductive electronic device housing member and the antenna ground. An adjustable capacitor may bridge the slot to provide high band tuning.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: July 16, 2019
    Assignee: Apple Inc.
    Inventors: Nanbo Jin, Yuehui Ouyang, Yijun Zhou, Enrique Ayala Vazquez, Anand Lakshmanan, Robert W. Schlub, Mattia Pascolini, Matthew A. Mow
  • Patent number: 10320069
    Abstract: An electronic device may be provided with wireless circuitry. The wireless circuitry may include multiple antennas and transceiver circuitry. An antenna may have an antenna resonating element formed from portions of a peripheral conductive electronic device housing structure and may have an antenna ground that is separated from the antenna resonating element by a gap. The antenna ground for the antenna may include a first conductive structure that is separated from the antenna resonating element by a first distance and a second conductive structure that is electrically connected to the first conductive structure and separated from the antenna resonating element by a second distance that is less than the first distance. A distributed impedance matching capacitor for the antenna may be formed from the second conductive structure and the antenna resonating element arm. The second conductive structure may be a conductive frame for an electronic component such as a sensor.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: June 11, 2019
    Assignee: Apple Inc.
    Inventors: Yijun Zhou, Jennifer M. Edwards, Yiren Wang, Hao Xu, Ming-Ju Tsai, Mattia Pascolini
  • Patent number: 10312571
    Abstract: An electronic device may be provided with wireless circuitry. The wireless circuitry may include multiple antennas and transceiver circuitry. The antenna structures at a first end of the electronic device may include an inverted-F antenna resonating element for a first antenna formed from portions of a peripheral conductive electronic device housing structure and an antenna ground that is separated from the antenna resonating element by a gap. The inverted-F antenna resonating element arm may have a first end adjacent a first dielectric-filled gap and an opposing second end adjacent a second dielectric-filled gap. A second antenna may include an additional antenna resonating element arm and the antenna ground. A second end of the additional antenna resonating element arm may be interposed between the first dielectric-filled gap and a first end of the additional antenna resonating element arm. This type of arrangement may ensure the first and second antennas are isolated.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: June 4, 2019
    Assignee: Apple Inc.
    Inventors: Jennifer M. Edwards, Yijun Zhou, Yiren Wang, Hao Xu, Mattia Pascolini
  • Patent number: 10305453
    Abstract: An electronic device may be provided with wireless circuitry and control circuitry. The wireless circuitry may include an antenna with an inverted-F antenna resonating element formed from portions of a peripheral conductive electronic device housing structure and may have an antenna ground that is separated from the antenna resonating element by a gap. The antenna may include a first adjustable component coupled between the antenna resonating element arm and the antenna ground on a first side of the antenna feed and a second adjustable component coupled between the antenna resonating element arm and the antenna ground on a second side of the antenna feed. Control circuitry in the electronic device may adjust the first and second adjustable components between a first tuning mode, a second tuning mode, and a third tuning mode.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: May 28, 2019
    Assignee: Apple Inc.
    Inventors: Jennifer M. Edwards, Yijun Zhou, Yiren Wang, Hao Xu, Ming-Ju Tsai, Victor C. Lee, Liang Han, Matthew A. Mow, Mattia Pascolini
  • Patent number: 10263335
    Abstract: An electronic device may be provided with wireless circuitry. The wireless circuitry may include antenna structures such as an antenna resonating element arm and an antenna ground. A split return path may be coupled between the antenna resonating element arm and the antenna ground. The antenna structures may form one or more inverted-F antennas when operated at non-near-field communications frequencies. The antenna structures may be coupled to near-field communications transceiver circuitry using a conductive path. When operated at near-field communications frequencies, near-field communications signals may be conveyed using the conductive path, the antenna resonating element arm, the return path, and the antenna ground. A capacitor may be coupled between the conductive path and an antenna ground. The capacitor may short non-near-field communications signals to the antenna ground and block near-field communications signals from passing from the conductive path to the antenna ground.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: April 16, 2019
    Assignee: Apple Inc.
    Inventors: Yijun Zhou, Yiren Wang, Jennifer M. Edwards, Hao Xu, Mattia Pascolini
  • Publication number: 20190081398
    Abstract: An electronic device may be provided with wireless circuitry. The wireless circuitry may include antenna structures such as an antenna resonating element arm and an antenna ground. A split return path may be coupled between the antenna resonating element arm and the antenna ground. The antenna structures may form one or more inverted-F antennas when operated at non-near-field communications frequencies. The antenna structures may be coupled to near-field communications transceiver circuitry using a conductive path. When operated at near-field communications frequencies, near-field communications signals may be conveyed using the conductive path, the antenna resonating element arm, the return path, and the antenna ground. A capacitor may be coupled between the conductive path and an antenna ground. The capacitor may short non-near-field communications signals to the antenna ground and block near-field communications signals from passing from the conductive path to the antenna ground.
    Type: Application
    Filed: September 11, 2017
    Publication date: March 14, 2019
    Inventors: Yijun Zhou, Yiren Wang, Jennifer M. Edwards, Hao Xu, Mattia Pascolini
  • Publication number: 20190081393
    Abstract: An electronic device may be provided with wireless circuitry. The wireless circuitry may include multiple antennas and transceiver circuitry. An antenna may have an antenna resonating element formed from portions of a peripheral conductive electronic device housing structure and may have an antenna ground that is separated from the antenna resonating element by a gap. The antenna ground for the antenna may include a first conductive structure that is separated from the antenna resonating element by a first distance and a second conductive structure that is electrically connected to the first conductive structure and separated from the antenna resonating element by a second distance that is less than the first distance. A distributed impedance matching capacitor for the antenna may be formed from the second conductive structure and the antenna resonating element arm. The second conductive structure may be a conductive frame for an electronic component such as a sensor.
    Type: Application
    Filed: September 11, 2017
    Publication date: March 14, 2019
    Inventors: Yijun Zhou, Jennifer M. Edwards, Yiren Wang, Hao Xu, Ming-Ju Tsai, Mattia Pascolini
  • Publication number: 20190081385
    Abstract: An electronic device may be provided with wireless circuitry. The wireless circuitry may include multiple antennas and transceiver circuitry. The antennas may include antenna structures at opposing first and second ends of the electronic device. The antenna structures at a given end of the device may include antenna structures that are shared between multiple antennas. The electronic device may include a first antenna with an inverted-F antenna resonating element formed from portions of a peripheral conductive housing structure and may have an antenna ground that is separated from the antenna resonating element by a gap. A return path may bridge the gap. The electronic device may also include a second antenna that includes the antenna ground and an additional antenna resonating element. The antenna resonating element of the second antenna may be parasitically coupled to the return path of the inverted-F antenna at given frequencies.
    Type: Application
    Filed: September 8, 2017
    Publication date: March 14, 2019
    Inventors: Bilgehan Avser, Georgios Atmatzakis, Hao Xu, Mattia Pascolini, Salih Yarga, Xu Gao, Xu Han, Yijun Zhou
  • Publication number: 20190081386
    Abstract: An electronic device may be provided with wireless circuitry. The wireless circuitry may include multiple antennas and transceiver circuitry. The antenna structures at a first end of the electronic device may include an inverted-F antenna resonating element for a first antenna formed from portions of a peripheral conductive electronic device housing structure and an antenna ground that is separated from the antenna resonating element by a gap. The inverted-F antenna resonating element arm may have a first end adjacent a first dielectric-filled gap and an opposing second end adjacent a second dielectric-filled gap. A second antenna may include an additional antenna resonating element arm and the antenna ground. A second end of the additional antenna resonating element arm may be interposed between the first dielectric-filled gap and a first end of the additional antenna resonating element arm. This type of arrangement may ensure the first and second antennas are isolated.
    Type: Application
    Filed: September 11, 2017
    Publication date: March 14, 2019
    Inventors: Jennifer M. Edwards, Yijun Zhou, Yiren Wang, Hao Xu, Mattia Pascolini
  • Publication number: 20190081615
    Abstract: An electronic device may be provided with wireless circuitry and control circuitry. The wireless circuitry may include an antenna with an inverted-F antenna resonating element formed from portions of a peripheral conductive electronic device housing structure and may have an antenna ground that is separated from the antenna resonating element by a gap. The antenna may include a first adjustable component coupled between the antenna resonating element arm and the antenna ground on a first side of the antenna feed and a second adjustable component coupled between the antenna resonating element arm and the antenna ground on a second side of the antenna feed. Control circuitry in the electronic device may adjust the first and second adjustable components between a first tuning mode, a second tuning mode, and a third tuning mode.
    Type: Application
    Filed: September 11, 2017
    Publication date: March 14, 2019
    Inventors: Jennifer M. Edwards, Yijun Zhou, Yiren Wang, Hao Xu, Ming-Ju Tsai, Victor C. Lee, Liang Han, Matthew A. Mow, Mattia Pascolini
  • Publication number: 20190081396
    Abstract: An electronic device may be provided with wireless circuitry and control circuitry. The wireless circuitry may include multiple antennas and transceiver circuitry. An antenna in the electronic device may have an inverted-F antenna resonating element formed from portions of a peripheral conductive electronic device housing structure and may have an antenna ground that is separated from the antenna resonating element by a gap. A split return path may bridge the gap. The split return path may be coupled between a first point on the inverted-F antenna resonating element arm and second and third points on the antenna ground. The split return path may include a first inductor coupled between the first and second points and a second inductor coupled between the first and third points. The first and second inductors may be adjustable.
    Type: Application
    Filed: September 11, 2017
    Publication date: March 14, 2019
    Inventors: Yijun Zhou, Yiren Wang, Jennifer M. Edwards, Hao Xu, Mattia Pascolini
  • Publication number: 20190081694
    Abstract: An electronic device may be provided with antenna structures and control circuitry. The antenna structures may include an antenna resonating element arm, an antenna ground, and an antenna feed coupled between the antenna resonating element arm and the antenna ground. The electronic device may include a tunable component configured to tune a frequency response of the antenna structures. The electronic device may also include a substrate, a radio-frequency transceiver on the substrate, control circuitry configured to generate control signals, a flexible printed circuit, and a connector. The connector may mechanically secure the flexible printed circuit to the substrate and may be electrically coupled to the transceiver and the control circuitry. The flexible printed circuit may include a radio-frequency transmission line coupled between the antenna feed and the connector and a control signal path coupled between the tunable component and the connector.
    Type: Application
    Filed: September 11, 2017
    Publication date: March 14, 2019
    Inventors: Yijun Zhou, Yiren Wang, Jennifer M. Edwards, Hao Xu, Ming-Ju Tsai, Mattia Pascolini
  • Publication number: 20190081410
    Abstract: Antenna structures at a given end of an electronic device may include antenna structures that are shared between multiple antennas. The device may include an antenna with an inverted-F antenna resonating element formed from portions of a peripheral conductive electronic device housing structure and may have an antenna ground that is separated from the antenna resonating element by a gap. A short circuit path may bridge the gap. The short circuit path may be a split return path coupled between a first point on the inverted-F antenna resonating element arm and second and third points on the antenna ground. The electronic device may include an additional antenna that includes the antenna ground and metal traces that form an antenna resonating element arm. The antenna resonating element arm of the additional antenna may be parasitically coupled to the inverted-F antenna resonating element and a portion of the split return path.
    Type: Application
    Filed: September 11, 2017
    Publication date: March 14, 2019
    Inventors: Yijun Zhou, Yiren Wang, Jennifer M. Edwards, Hao Xu, Mattia Pascolini
  • Publication number: 20190081394
    Abstract: An electronic device may be provided with wireless circuitry and control circuitry. The wireless circuitry may include multiple antennas and transceiver circuitry. An antenna in the electronic device may have an inverted-F antenna resonating element formed from portions of a peripheral conductive electronic device housing structure and may have an antenna ground that is separated from the antenna resonating element by a gap. The antenna ground for the antenna may include a conductive frame for the display. The conductive frame may have a first portion that is separated from the antenna resonating element arm by a first distance and a second portion that is that is separated from the antenna resonating element arm by a second distance that is less than the first distance. The second portion may be configured to form a distributed impedance matching capacitance with the antenna resonating element arm.
    Type: Application
    Filed: September 11, 2017
    Publication date: March 14, 2019
    Inventors: Jennifer M. Edwards, Yijun Zhou, Yiren Wang, Hao Xu, Ming-Ju Tsai, Mattia Pascolini
  • Publication number: 20190023690
    Abstract: A compound having the following structure (I): or a pharmaceutically acceptable salt, prodrug, stereoisomer or tautomer thereof, is provided. Related compounds, methods for preparation of the same and uses of the compounds for treatment of various indications, including treatment of necrotic cell diseases and/or inflammation, are also provided.
    Type: Application
    Filed: February 15, 2018
    Publication date: January 24, 2019
    Inventors: Junying Yuan, Yijun Zhou, Shan Qian, Dawei Ma
  • Patent number: 10158384
    Abstract: An electronic device may be provided with wireless circuitry and control circuitry. The wireless circuitry may include multiple antennas and transceiver circuitry. An antenna in the electronic device may have an inverted-F antenna resonating element formed from portions of a peripheral conductive electronic device housing structure and may have an antenna ground that is separated from the antenna resonating element by a gap. The antenna may also include an indirectly-fed antenna resonating element that is indirectly fed by a harmonic mode of the inverted-F antenna resonating element via near field electromagnetic coupling. The indirectly-fed antenna resonating element may be a slot. The antenna ground may define at least three edges of the slot and the slot may be aligned with a dielectric-filled gap in the peripheral conductive housing structures. An adjustable circuit may be coupled across the slot to tune the indirectly-fed antenna resonating element.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: December 18, 2018
    Assignee: Apple Inc.
    Inventors: Salih Yarga, Xu Gao, Georgios Atmatzakis, Xu Han, Bilgehan Avser, Hao Xu, Yijun Zhou, Mattia Pascolini
  • Publication number: 20180342794
    Abstract: An electronic device may include an antenna having a resonating element, an antenna ground, and a feed. First and second tunable components may be coupled to the resonating element. Adjustable matching circuitry may be coupled to the feed. Control circuitry may use the first tunable component to tune a midband antenna resonance when sensor circuitry identifies that the device is being held in a right hand and may use the second tunable component to tune the midband resonance when the sensor circuitry identifies that the device is being held in a left hand. For tuning a low band resonance, the control circuitry may place the antenna in different tuning states by sequentially adjusting a selected one of the matching circuitry and the tunable components, potentially reverting to a previous tuning state at each step in the sequence. This may ensure that antenna efficiency is satisfactory regardless of antenna loading conditions.
    Type: Application
    Filed: May 23, 2017
    Publication date: November 29, 2018
    Inventors: Liang Han, Thomas E. Biedka, Matthew A. Mow, Iyappan Ramachandran, Mattia Pascolini, Xu Han, Hao Xu, Jennifer M. Edwards, Salih Yarga, Yijun Zhou
  • Patent number: 9944628
    Abstract: A compound having the following structure (I): or a pharmaceutically acceptable salt, prodrug, stereoisomer or tautomer thereof, is provided. Related compounds, methods for preparation of the same and uses of the compounds for treatment of various indications, including treatment of necrotic cell diseases and/or inflammation, are also provided.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: April 17, 2018
    Assignees: President and Fellows of Harvard College, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences
    Inventors: Junying Yuan, Yijun Zhou, Shan Qian, Dawei Ma