Search Patents
  • Wireless midfield systems and methods
    Patent number: 10124180
    Abstract: Implantable devices and/or sensors can be wirelessly powered by controlling and propagating electromagnetic waves in a patient's tissue. Such implantable devices/sensors can be implanted at target locations in a patient, to stimulate areas such as the heart, brain, spinal cord, or muscle tissue, and/or to sense biological, physiological, chemical attributes of the blood, tissue, and other patient parameters. The propagating electromagnetic waves can be generated with sub-wavelength structures configured to manipulate evanescent fields outside of tissue to generate the propagating waves inside the tissue. Methods of use are also described.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: November 13, 2018
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Ada Shuk Yan Poon, Alexander Yeh, Yuji Tanabe, John Ho, Sanghoek Kim
  • Multi-element coupler for generation of electromagnetic energy
    Patent number: 9687664
    Abstract: Implantable devices and/or sensors can be wirelessly powered by controlling and propagating electromagnetic waves in a patient's tissue. Such implantable devices/sensors can be implanted at target locations in a patient, to stimulate areas such as the heart, brain, spinal cord, or muscle tissue, and/or to sense biological, physiological, chemical attributes of the blood, tissue, and other patient parameters. The propagating electromagnetic waves can be generated with sub-wavelength structures configured to manipulate evanescent fields outside of tissue to generate the propagating waves inside the tissue. Methods of use are also described.
    Type: Grant
    Filed: September 16, 2014
    Date of Patent: June 27, 2017
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Ada Shuk Yan Poon, Alexander Jueshyan Yeh, Yuji Tanabe, John Ho, Sanghoek Kim
  • Wireless midfield systems and methods
    Patent number: 10039924
    Abstract: Implantable devices and/or sensors can be wirelessly powered by controlling and propagating electromagnetic waves in a patient's tissue. Such implantable devices/sensors can be implanted at target locations in a patient, to stimulate areas such as the heart, brain, spinal cord, or muscle tissue, and/or to sense biological, physiological, chemical attributes of the blood, tissue, and other patient parameters. The propagating electromagnetic waves can be generated with sub-wavelength structures configured to manipulate evanescent fields outside of tissue to generate the propagating waves inside the tissue. Methods of use are also described.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: August 7, 2018
    Assignee: THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
    Inventors: Ada Shuk Yan Poon, Alexander Yeh, Yuji Tanabe, John Ho, Sanghoek Kim
  • Wireless communication device using adaptive beamforming
    Patent number: 7904117
    Abstract: A method and apparatus is disclosed herein for wireless communication with adaptive beamforming. In one embodiment, the apparatus comprises a processor, a radio frequency (RF) transmitter having a digitally controlled phased array antenna coupled to and controlled by the processor to transmit content using adaptive beamforming, and an interface to a wireless communication channel coupled to the processor to communicate antenna information relating to the use of the phased array antenna and to communicate information to facilitate playing the content at another location.
    Type: Grant
    Filed: August 12, 2005
    Date of Patent: March 8, 2011
    Assignee: SIBEAM
    Inventors: Chinh H. Doan, Sohrab Emami-Neyestanak, John Marshall, Chuen-Shen Shung, Tim Arthur Williams, Robert W. Brodersen, Jeffrey M. Gilbert, Ada Shuk Yan Poon
  • Radio-frequency energy transfers or harvesting based on combining direct current signals from multiple antennas
    Patent number: 10079438
    Abstract: A radio-frequency power receiving device has RF antennas connected to multiple controllable rectifying circuits to produce corresponding DC signals which are combined in a controllable switching network to produce a combined DC output. A control unit determines an amplitude control signal that controls each rectifying circuit and also determines switch control signals that control a switching network. The switching network controllably combines the direct-current signals to combine the multiple corresponding direct-current signals in series, in parallel, or in a combination of series and parallel.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: September 18, 2018
    Assignee: NVoLogic Inc
    Inventors: Yuji Tanabe, Ada Shuk Yan Poon, Siu-Weng Simon Wong
  • SHORT RANGE WIRELESS COMMUNICATION
    Publication number: 20170237469
    Abstract: An apparatus can have a power supply circuit configured to receive, from an antenna, a first signal at a frequency exceeding a GHz, and including a rectifier circuit that is impedance matched to the antenna at the first frequency and that is configured to generate a supply voltage by rectifying the first signal at the first frequency. A signal generation circuit can be configured to use the supply voltage to generate a second signal at as higher frequency and to operate in two different power modes in response to a data signal. A transmitter circuit can be configured to use the supply voltage to create pulse at the higher frequency of the signal and in response to the data signal, and that includes an amplifier circuit configured to receive the data signal and provide an amplification of the data signal to the antenna.
    Type: Application
    Filed: May 8, 2015
    Publication date: August 17, 2017
    Inventors: Mazhareddin Taghivand, Yashar Rajavi, Kamal Aggarwal, Ada Shuk Yan Poon
  • Wireless midfield systems and methods
    Patent number: 11013930
    Abstract: Implantable devices and/or sensors can be wirelessly powered by controlling and propagating electromagnetic waves in a patient's tissue. Such implantable devices/sensors can be implanted at target locations in a patient, to stimulate areas such as the heart, brain, spinal cord, or muscle tissue, and/or to sense biological, physiological, chemical attributes of the blood, tissue, and other patient parameters. The propagating electromagnetic waves can be generated with sub-wavelength structures configured to manipulate evanescent fields outside of tissue to generate the propagating waves inside the tissue. Methods of use are also described.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: May 25, 2021
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Ada Shuk Yan Poon, Alexander Jueshyan Yeh, Yuji Tanabe, John Ho, Sanghoek Kim
  • Wireless midfield systems and methods
    Patent number: 11007371
    Abstract: Implantable devices and/or sensors can be wirelessly powered by controlling and propagating electromagnetic waves in a patient's tissue. Such implantable devices/sensors can be implanted at target locations in a patient, to stimulate areas such as the heart, brain, spinal cord, or muscle tissue, and/or to sense biological, physiological, chemical attributes of the blood, tissue, and other patient parameters. The propagating electromagnetic waves can be generated with sub-wavelength structures configured to manipulate evanescent fields outside of tissue to generate the propagating waves inside the tissue. Methods of use are also described.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: May 18, 2021
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Ada Shuk Yan Poon, Alexander Jueshyan Yeh, Yuji Tanabe, John Ho, Sanghoek Kim
  • Multi-element coupler for generation of electromagnetic energy
    Patent number: 9630015
    Abstract: Implantable devices and/or sensors can be wirelessly powered by controlling and propagating electromagnetic waves in a patient's tissue. Such implantable devices/sensors can be implanted at target locations in a patient, to stimulate areas such as the heart, brain, spinal cord, or muscle tissue, and/or to sense biological, physiological, chemical attributes of the blood, tissue, and other patient parameters. The propagating electromagnetic waves can be generated with sub-wavelength structures configured to manipulate evanescent fields outside of tissue to generate the propagating waves inside the tissue. Methods of use are also described.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: April 25, 2017
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Ada Shuk Yan Poon, Alexander Jueshyan Yeh, Yuji Tanabe, John Ho, Sanghoek Kim
  • Methods and apparatus for power conversion and data transmission in implantable sensors, stimulators, and actuators
    Patent number: 10004913
    Abstract: Implantable devices and/or sensors can be wirelessly powered by controlling and propagating electromagnetic waves in a patient's tissue. Such implantable devices/sensors can be implanted at target locations in a patient, to stimulate areas such as the heart, brain, spinal cord, or muscle tissue, and/or to sense biological, physiological, chemical attributes of the blood, tissue, and other patient parameters. In some embodiments, the implantable devices can include power management schemes that have one or more AC-DC conversion chains arranged and configured to rectify the induced alternating current or voltage into one or more energy domains. Methods of use are also described.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: June 26, 2018
    Assignee: THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
    Inventors: Ada Shuk Yan Poon, Alexander J. Yeh
  • Wireless midfield systems and methods
    Patent number: 10857370
    Abstract: Implantable devices and/or sensors can be wirelessly powered by controlling and propagating electromagnetic waves in a patient's tissue. Such implantable devices/sensors can be implanted at target locations in a patient, to stimulate areas such as the heart, brain, spinal cord, or muscle tissue, and/or to sense biological, physiological, chemical attributes of the blood, tissue, and other patient parameters. The propagating electromagnetic waves can be generated with sub-wavelength structures configured to manipulate evanescent fields outside of tissue to generate the propagating waves inside the tissue. Methods of use are also described.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: December 8, 2020
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Ada Shuk Yan Poon, Alexander Jueshyan Yeh, Yuji Tanabe, John Ho, Sanghoek Kim
  • Wireless midfield systems and methods
    Patent number: 11771911
    Abstract: Implantable devices and/or sensors can be wirelessly powered by controlling and propagating electromagnetic waves in a patient's tissue. Such implantable devices/sensors can be implanted at target locations in a patient, to stimulate areas such as the heart, brain, spinal cord, or muscle tissue, and/or to sense biological, physiological, chemical attributes of the blood, tissue, and other patient parameters. The propagating electromagnetic waves can be generated with sub-wavelength structures configured to manipulate evanescent fields outside of tissue to generate the propagating waves inside the tissue. Methods of use are also described.
    Type: Grant
    Filed: January 14, 2021
    Date of Patent: October 3, 2023
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Ada Shuk Yan Poon, Alexander Jueshyan Yeh, Yuji Tanabe, John Ho, Sanghoek Kim
  • Wireless midfield systems and methods
    Patent number: 10870011
    Abstract: Implantable devices and/or sensors can be wirelessly powered by controlling and propagating electromagnetic waves in a patient's tissue. Such implantable devices/sensors can be implanted at target locations in a patient, to stimulate areas such as the heart, brain, spinal cord, or muscle tissue, and/or to sense biological, physiological, chemical attributes of the blood, tissue, and other patient parameters. The propagating electromagnetic waves can be generated with sub-wavelength structures configured to manipulate evanescent fields outside of tissue to generate the propagating waves inside the tissue. Methods of use are also described.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: December 22, 2020
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Ada Shuk Yan Poon, Alexander Jueshyan Yeh, Yuji Tanabe, John Ho, Sanghoek Kim
  • Methods and apparatus for power conversion and data transmission in implantable sensors, stimulators, and actuators
    Patent number: 10828502
    Abstract: Implantable devices and/or sensors can be wirelessly powered by controlling and propagating electromagnetic waves in a patient's tissue. Such implantable devices/sensors can be implanted at target locations in a patient, to stimulate areas such as the heart, brain, spinal cord, or muscle tissue, and/or to sense biological, physiological, chemical attributes of the blood, tissue, and other patient parameters. In some embodiments, the implantable devices can include power management schemes that have one or more AC-DC conversion chains arranged and configured to rectify the induced alternating current or voltage into one or more energy domains. Methods of use are also described.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: November 10, 2020
    Assignee: THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
    Inventors: Ada Shuk Yan Poon, Alexander J. Yeh
  • Method and apparatus for fabricating an energy transmitting device
    Patent number: 10843004
    Abstract: Implantable devices and/or sensors can be wirelessly powered by controlling and propagating electromagnetic waves in a patient's tissue. Such implantable devices/sensors can be implanted at target locations in a patient, to stimulate areas such as the heart, brain, spinal cord, or muscle tissue, and/or to sense biological physiological, chemical attributes of the blood, tissue, and other patient parameters. The propagating electromagnetic waves can be generated with sub-wavelength structures configured to manipulate evanescent fields outside of tissue to generate the propagating waves inside the tissue. Methods of use are also described.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: November 24, 2020
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Ada Shuk Yan Poon, Alexander Jueshyan Yeh, Yuji Tanabe, John Ho, Sanghoek Kim
  • AUTOFOCUS WIRELESS POWER TRANSFER TO IMPLANTABLE DEVICES IN FREELY MOVING ANIMALS
    Publication number: 20170065828
    Abstract: A power transmitter is provided that can include a microwave cavity resonant at a desired operating frequency, a hexagonal mesh top to leak evanescent fields out of the cavity, and a plurality of orthogonal monopole feeds with 90 degrees phase differences creating circularly polarized waves. The power transmitter can be configured to transmit energy to a wireless device implanted in an animal passing through the evanescent fields. Implantable devices are also described which can receive wireless energy from the power transmitter and stimulate the animals (e.g., optogenetic or electrical stimulation).
    Type: Application
    Filed: March 25, 2015
    Publication date: March 9, 2017
    Inventors: Ada Shuk Yan POON, John S. Y. HO, Yuji TANABE, Alexander J. YEH, Kate L. MONTGOMERY, Logan GROSENICK, Emily A. FERENCZI, Vivien TSAO, Shrivats Mohan IYER, Scott Lee DELP, Karl DEISSEROTH
  • WIRELESS DETECTION COIL SYSTEM
    Publication number: 20170307700
    Abstract: In certain embodiments, a coil circuitry component may be configured to detect RF signals from excited spins of at least a region of an organism, where the coil circuitry component comprises a RF detection coil and a detuning circuit for detuning the RF detection coil. A coil signal detection component may be configured to extract at least some of the RF signals detected by the coil circuitry component and to convert the extracted RF signals from analog signal to digital signals. An excitation estimation component may be configured to estimate the excitation pulses from an excitation source and to generate a control timing signal from the estimated excitation pulses to set a state of the detuning circuit. A wireless communication component may be configured to wirelessly transmit the converted RF signals, the estimated excitation pulses, and the control timing signal to an external computer system.
    Type: Application
    Filed: April 26, 2017
    Publication date: October 26, 2017
    Inventors: Bob Sueh-chien HU, Ada Shuk-Yan POON
  • Short range wireless communication
    Patent number: 9991751
    Abstract: An apparatus can have a power supply circuit configured to receive, from an antenna, a first signal at a frequency exceeding a GHz, and including a rectifier circuit that is impedance matched to the antenna at the first frequency and that is configured to generate a supply voltage by rectifying the first signal at the first frequency. A signal generation circuit can be configured to use the supply voltage to generate a second signal at as higher frequency and to operate in two different power modes in response to a data signal. A transmitter circuit can be configured to use the supply voltage to create pulse at the higher frequency of the signal and in response to the data signal, and that includes an amplifier circuit configured to receive the data signal and provide an amplification of the data signal to the antenna.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: June 5, 2018
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Mazhareddin Taghivand, Yashar Rajavi, Kamal Aggarwal, Ada Shuk Yan Poon
  • NEURAL NET COMPUTER SYSTEM WITH WIRELESS OR OPTICAL CONNECTIONS BETWEEN NEURAL NET COMPUTING NODES
    Publication number: 20170300807
    Abstract: In certain embodiments, a neural net computer system may include a plurality of computing nodes. At least some of the computing nodes are associated with a first layer of a neural net. At least some of the computing nodes are associated with a second layer of the neural net. The computing nodes may each include (i) one or more processors, (ii) memory, and (iii) a wireless or optical communication unit. For each of the computing nodes: (i) the processors, the memory, and the wireless or optical communication unit of the computing node are on-die components of the computing node, and (ii) the processors of the computing node (a) transmit signals to other ones of the computing nodes via the wireless or optical communication unit of the computing node and (b) receive signals from other ones of the computing nodes via the wireless or optical communication unit of the computing node.
    Type: Application
    Filed: April 24, 2017
    Publication date: October 19, 2017
    Inventors: Bob Sueh-chien HU, Ada Shuk-Yan POON
  • Autofocus wireless power transfer to implantable devices in freely moving animals
    Patent number: 10434329
    Abstract: A power transmitter is provided that can include a microwave cavity resonant at a desired operating frequency, a hexagonal mesh top to leak evanescent fields out of the cavity, and a plurality of orthogonal monopole feeds with 90 degrees phase differences creating circularly polarized waves. The power transmitter can be configured to transmit energy to a wireless device implanted in an animal passing through the evanescent fields. Implantable devices are also described which can receive wireless energy from the power transmitter and stimulate the animals (e.g., optogenetic or electrical stimulation).
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: October 8, 2019
    Assignee: THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
    Inventors: Ada Shuk Yan Poon, John S. Y. Ho, Yuji Tanabe, Alexander J. Yeh, Kate L. Montgomery, Logan Grosenick, Emily A. Ferenczi, Vivien Tsao, Shrivats Mohan Iyer, Scott Lee Delp, Karl Deisseroth
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