Patents by Inventor William N. Carr

William N. Carr 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: 10690609
    Abstract: A system and method for sensing wave impedance of a material using an RF power source with a sensor structure comprised of a resonant electromagnetic radiative filter (MEF). The wave impedance is determined by processing a differential RF signal level within an interrogator comprising an impedance calculator. A differential RF signal between a source signal level and a response signal level affected by field coupling of the REF with a material of interest. In embodiments based on frequency scanning transmissometry (FST), the impedance spectrometer determines both the real and imaginary part of the wave impedance of the material. In embodiments the impedance spectrometer comprises an RFID transponder. In embodiments, the interrogator is disposed as payload on a UAV drone. In embodiments, the impedance spectrometer is a node within a communications network.
    Type: Grant
    Filed: November 25, 2019
    Date of Patent: June 23, 2020
    Inventor: William N Carr
  • Publication number: 20200191655
    Abstract: A thermal pixel configured as an electromagnetic emitter and/or an electromagnetic detector operating within a limited bandwidth. The thermal pixel comprises a micro-platform thermally isolated from a surrounding off-platform region by phononic nanowires. In embodiments, the micro-platform is comprised of metamaterial and/or photonic crystal filters providing operation over a limited bandwidth. In other embodiments, the micro-platform is comprised of nanotube structure providing a broadband emission/absorption spectral response. Structural configurations for the pixel take advantage of the Kirchhoff law of thermal radiation which states that a good thermal emitter is also a good absorber. In a preferred embodiment the pixel is fabricated using a silicon SOI starting wafer.
    Type: Application
    Filed: December 15, 2018
    Publication date: June 18, 2020
    Inventor: William N. Carr
  • Publication number: 20200124553
    Abstract: A system and method for sensing wave impedance of a material using an RF power source with a sensor structure comprised of a resonant electromagnetic radiative filter (MEF). The wave impedance is determined by processing a differential RF signal level within an interrogator comprising an impedance calculator. A differential RF signal between a source signal level and a response signal level affected by field coupling of the REF with a material of interest. In embodiments based on frequency scanning transmissometry (FST), the impedance spectrometer determines both the real and imaginary part of the wave impedance of the material. In embodiments the impedance spectrometer comprises an RFID transponder. In embodiments, the interrogator is disposed as payload on a UAV drone. In embodiments, the impedance spectrometer is a node within a communications network.
    Type: Application
    Filed: November 25, 2019
    Publication date: April 23, 2020
    Inventor: William N. Carr
  • Publication number: 20200049640
    Abstract: A system and method for sensing the wave impedance of a material using an RF power source with a sensor structure comprised of a metamaterial radiative filter (MRF). The wave impedance is specified or monitored by processing a differential RF signal level with an impedance calculator. The differential RF signal level is obtained from a reference source signal and a response signal. RF field-coupling of the RF source with the material effects the response signal level. In embodiments, the spectrometer is physically configured for noninvasive and invasive measurements. In embodiments, the material is sensed when shielded by RF-opaque media. In embodiments, wherein the MRF has a fixed response characteristic, the dielectric constant may be obtained with a sensing structure comprised of two transponders and a single RF frequency. In embodiments wherein the MRF has a fixed response characteristic, both the dielectric constant and the loss tangent may be obtained using three transponders and a single RF frequency.
    Type: Application
    Filed: August 9, 2018
    Publication date: February 13, 2020
    Inventor: William N. Carr
  • Patent number: 10551334
    Abstract: A system and method for sensing the wave impedance of a material using an RF power source with a sensor structure comprised of a metamaterial radiative filter (MRF). The wave impedance is specified or monitored by processing a differential RF signal level with an impedance calculator. The differential RF signal level is obtained from a reference source signal and a response signal. RF field-coupling of the RF source with the material effects the response signal level. In embodiments, the spectrometer is physically configured for noninvasive and invasive measurements. In embodiments, the material is sensed when shielded by RF-opaque media. In embodiments, wherein the MRF has a fixed response characteristic, the dielectric constant may be obtained with a sensing structure comprised of two transponders and a single RF frequency. In embodiments wherein the MRF has a fixed response characteristic, both the dielectric constant and the loss tangent may be obtained using three transponders and a single RF frequency.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: February 4, 2020
    Inventor: William N. Carr
  • Publication number: 20200018714
    Abstract: An integrated thermal sensor comprising photonic crystal elements that enable photonic elements for photonic sourcing, spectral switching and filtering, sensing of an exposed analyte and detection. In embodiments, applications are disclosed wherein these photonic elements provide a spectrophotometer, a photonic channel switch and a standalone sensor for toxic gases and vapors. An application coupled with a mobile phone is disclosed.
    Type: Application
    Filed: May 16, 2019
    Publication date: January 16, 2020
    Inventor: William N. Carr
  • Patent number: 10353566
    Abstract: Semantic zoom techniques are described. In one or more implementations, techniques are described that may be utilized by a user to navigate to content of interest. These techniques may also include a variety of different features, such as to support semantic swaps and zooming “in” and “out.” These techniques may also include a variety of different input features, such as to support gestures, cursor-control device, and keyboard inputs. A variety of other features are also supported as further described in the detailed description and figures.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: July 16, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Theresa B. Pittappilly, Rebecca Deutsch, Orry W. Soegiono, Nicholas R. Waggoner, Holger Kuehnle, William D. Carr, Ross N. Luengen, Paul J. Kwiatkowski, Jan-Kristian Markiewicz, Gerrit H. Hofmeester, Robert Disano
  • Publication number: 20190107502
    Abstract: A thermal pixel is comprised of a micro-platform and includes a plurality of nanowires physically configured to reduce thermal conductivity. A sensing structure is comprised of thermal elements wherein the thermal impedance, electrical impedance or both are modulated upon exposure to a gas or vapor. Thermal elements physically configured on the micro-platform in embodiments include variously a resistive heater, a Seebeck sensor, a Peltier cooler and a thermistor.
    Type: Application
    Filed: October 6, 2017
    Publication date: April 11, 2019
    Inventor: William N. Carr
  • Publication number: 20190011477
    Abstract: An accelerometer based on convective thermal transport through a fluid is structured without a solid proof mass. Thermal transport through the fluid is sourced and sensed by thermal elements. The thermal elements are comprised of phononic structures which increase power efficiency for accelerometer operation and provide an increased sensitivity to acceleration vectors. The temperature of the sensing element is a function of the vectored acceleration of the enclosed cavity structure. The accelerometer in embodiments provides an extended range for multi-axis accelerations from excitations such as vibration, shock and gravity. Integration of the accelerometer with CMOS signal conditioning circuitry on the same die is convenient.
    Type: Application
    Filed: May 29, 2018
    Publication date: January 10, 2019
    Inventor: William N. Carr
  • Publication number: 20180374981
    Abstract: A metamaterial pixel providing an electromagnetic emitter and/or en electromagnetic detector operating within a limited bandwidth. The metamaterial pixel is comprised of plasmonic elements arranged within a periodic photonic crystal array providing an electromagnetic emitter and/or an electromagnetic detector adapted in embodiments for operation at selected bandwidths within the wavelength range of visible out to a millimeter. Performance of the pixel in applications is enhanced with nanowires structured to enhance phononic scattering providing a reduction in thermal conductivity. In embodiments multiple pixels are adapted to provide a spectrometer for analyzing thermal radiation or electromagnetic reflection from a remote media. In other embodiments emitter and detector pixels are adapted to provide an absorptive spectrophotometer. In other embodiments one or more of metamaterial pixels are adapted as the transmitter and/or receiver within a communication system.
    Type: Application
    Filed: June 26, 2017
    Publication date: December 27, 2018
    Inventor: William N. Carr
  • Publication number: 20180364153
    Abstract: An infrared spectrometer chip including a suspended micro-platform, the suspended micro-platform being configured as a thermal detector with integrated photonic and phononic structure. The chip in embodiments includes temperature controlled elements including a photonic source, filter, sensor and detector. Thermoelectric devices are disposed on the micro-platform.
    Type: Application
    Filed: June 15, 2017
    Publication date: December 20, 2018
    Inventor: William N Carr
  • Patent number: 10101288
    Abstract: A system and method for measuring the permittivity and/or the impedance of a material are based on transmitting a first RF signal to a transponder coupled to the material. The transponder is equipped with a resonant antenna coupled to the material such that the response of the antenna is affected by the material. The signal strength of a second RF signal transmitted by the transponder in response to the first RF signal, and received by an interrogator, is measured. The interrogator can calculate both the real part and the imaginary part of the complex impedance of the material from multiple measurements of the signal strength of the second RF signal taken at a plurality of frequencies of the first RF signal.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: October 16, 2018
    Inventor: William N. Carr
  • Patent number: 10008373
    Abstract: An impedance spectrometer comprised of a thermal micro-platform supported with phononic structured nanowires disposed within a micromachined structure is provided to identify, monitor and characterize a gas, vapor, solid or liquid analyte. The impedance sensor and analyte sensing element in embodiments are formed from a semiconductor SOI starting wafer.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: June 26, 2018
    Inventor: William N Carr
  • Patent number: 9817130
    Abstract: A radiation dosimeter comprising a thermal micro-platform with a plurality of nanowires having phononic structures providing improved thermal isolation of the micro-platform. In embodiments, thermo-luminescent, MOS transistor and PIN diode sensors for x-ray, gamma, charged particles and neutron irradiation are disposed on the micro-platform. In a preferred embodiment the dosimeter is fabricated using a silicon SOI starting wafer.
    Type: Grant
    Filed: June 18, 2017
    Date of Patent: November 14, 2017
    Inventor: William N. Carr
  • Publication number: 20170248533
    Abstract: A system and method for measuring the permittivity and/or the impedance of a material are based on transmitting a first RF signal to a transponder coupled to the material. The transponder is equipped with a resonant antenna coupled to the material such that the response of the antenna is affected by the material. The signal strength of a second RF signal transmitted by the transponder in response to the first RF signal, and received by an interrogator, is measured. The interrogator can calculate both the real part and the imaginary part of the complex impedance of the material from multiple measurements of the signal strength of the second RF signal taken at a plurality of frequencies of the first RF signal.
    Type: Application
    Filed: August 28, 2015
    Publication date: August 31, 2017
    Inventor: William N. Carr
  • Publication number: 20170237466
    Abstract: A sensor system with energy harvesting has an energy-harvesting mode of operation and a load-enabling mode of operation, enabled at separate times. The system includes an antenna, an impedance-matching network, an RF switch, inductive and diode components (for forming a resonant RF-to-DC voltage multiplication circuit in conjunction with other elements of the system), a DC switch, an energy-storage device, and a primary load circuit.
    Type: Application
    Filed: February 16, 2017
    Publication date: August 17, 2017
    Inventor: William N. Carr
  • Patent number: 9722165
    Abstract: A thermoelectric pixel includes a micro-platform and a device layer having one or more support layers suspended at a perimeter thereof. The pixel includes structures which reduce thermal conductivity and improve platform planarity. In embodiments providing an infrared sensor, carbon nanotubes are used to enhance infrared absorption into the sensor pixel. In other embodiments, the pixel provides a thermoelectric energy harvester.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: August 1, 2017
    Inventor: William N. Carr
  • Publication number: 20160240762
    Abstract: A thermoelectric pixel includes a micro-platform and a device layer having one or more support layers suspended at a perimeter thereof. The pixel includes structures which reduce thermal conductivity and improve platform planarity. In embodiments providing an infrared sensor, carbon nanotubes are used to enhance infrared absorption into the sensor pixel. In other embodiments, the pixel provides a thermoelectric energy harvester.
    Type: Application
    Filed: March 29, 2016
    Publication date: August 18, 2016
    Inventor: William N. Carr
  • Patent number: 9372114
    Abstract: An “integrated” Fabry-Perot interferometer, such as for use in a spectrophotometer, is fabricated by attaching two micro-machined semiconductor-on-insulator wafers to one another. One mirror is formed on each micro-machined wafer. One mirror is supported by a thermally insulated, suspended micro-platform. In some embodiments, interferometer cavity length is adjustable. Detectors are disposed at least partially within the micro-platform. In some embodiments, the interferometer, a light source, and other circuitry and components, such as wireless communications components, are contained in a sealed package that includes a sampling region, thereby providing an integrated spectrophotometer. The integrated spectrophotometer can be implanted, for example, in animal tissue environments, such as for analyzing various compounds in the blood.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: June 21, 2016
    Inventor: William N. Carr
  • Patent number: D852659
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: July 2, 2019
    Inventor: William N Carr