Abstract: Described is a locomotive implant for usage within a predetermined magnetic field. In one embodiment magnetohydrodynamics is used to generate thrust with a plurality of electrodes. In another embodiment, asymmetric drag forces are used to generate thrust.
Type:
Grant
Filed:
September 27, 2021
Date of Patent:
May 7, 2024
Assignee:
The Board of Trustees of The Leland Stanford Junior University
Inventors:
Daniel M. Pivonka, Anatoly Anatolievich Yakovlev, Ada Shuk Yan Poon, Teresa H. Meng
Abstract: Described is an apparatus and method for increasing a gain of a transmitted power signal in a wireless link when operating in a mid field wavelength that is within a range between wavelength/100 to 100*wavelength and within a medium having a complex impedance between a transmit antenna and a receive antenna. The apparatus and method maximize the gain in the wireless link using simultaneous conjugate matching, to increase power transfer within the transmitted power signal, wherein the simultaneous conjugate matching accounts for interaction between the transmit antenna and the receive antenna, including the complex impedance of the medium between the transmit antenna and the receive antenna.
Type:
Grant
Filed:
June 16, 2009
Date of Patent:
January 21, 2014
Assignee:
The Board of Trustees of The Leland Stanford Junior University
Inventors:
Stephen O'Driscoll, Ada Shuk Yan Poon, Teresa H. Meng
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
Abstract: Described herein are methods of making and using and apparatus for wirelessly communicating data and providing power, particularly from a location exterior to a body and to an implantable device disposed within a body with tissue. The described embodiments provide apparatus and methods for efficiently transfer data and power between an external transceiver and an (implanted) biomedical device. The method is to modulate power carrier, which wirelessly powers the device, using an asynchronous modulation scheme, such as amplitude shift keying (ASK) modulation, with minimal modulation depth in order to not disrupt the power flow. The digital data is encoded in the pulse width, eliminating the need for synchronization to the power carrier signal and further minimizing the power consumption necessary for data transfer. Additionally, a reverse backscatter method for obtaining data from the implant is described that has flexible, low power operation.
Type:
Grant
Filed:
May 11, 2021
Date of Patent:
September 20, 2022
Assignee:
THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
Inventors:
Anatoly Anatolievich Yakovlev, Daniel Pivonka, Ada Shuk Yan Poon, Teresa H. Meng