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    Determining transmit power limits using a combined specific absorption measurement for multiple transmitters
    3.
    发明授权
    Determining transmit power limits using a combined specific absorption measurement for multiple transmitters 有权

    公开(公告)号：US09781683B2

    公开(公告)日：2017-10-03

    申请号：US14572214

    申请日：2014-12-16

    Applicant: QUALCOMM Incorporated

    Inventor： Jagadish Nadakuduti ,  Lin Lu ,  Paul Guckian

    IPC: H04W52/18 ,  H04W24/02 ,  H04B1/3827 ,  H04W52/36 ,  H04B17/10

    CPC classification number: H04W52/18 ,  H04B1/3838 ,  H04B17/102 ,  H04W24/02 ,  H04W52/367

    Abstract: A method and apparatus for determining transmit power limits for multiple transmitter devices is provided. The method begins when a two-dimensional area scan and a localized three-dimensional volume scan are performed for each transmitter and antenna. These two-dimensional area scans are converted to a three-dimensional full volume data using analytical estimations to determine the peak averaged SAR value, and subsequently determining the error associated with the analytical estimation. The error associated with the analytical estimation is determined by comparison with the measured value. The combined peak averaged SAR may then be determined for simultaneous transmissions of multiple transmitters with varying transmit powers by combining the scaled and analytically determined three-dimensional full volume data for each transmitter. The value is then further scaled by the worst-case conversion error for all active transmitters. This value is compared with the SAR limit and the maximum allowable transmit power determined for the multiple transmitters.

    Real-time specific absorption rate implementation in wireless devices
    4.
    发明授权
    Real-time specific absorption rate implementation in wireless devices 有权

    公开(公告)号：US09622187B2

    公开(公告)日：2017-04-11

    申请号：US15052378

    申请日：2016-02-24

    Applicant: QUALCOMM Incorporated

    Inventor： Theodore Logan ,  Jagadish Nadakuduti ,  Lin Lu ,  Paul Guckian

    IPC: H04B1/04 ,  H04W52/18 ,  H04W52/36 ,  H04B1/034

    CPC classification number: H04W52/18 ,  H04W52/226 ,  H04W52/36 ,  H04W52/367

    Abstract: Embodiments disclosed herein provide a method and apparatus for optimizing time-averaged transmitter power of a communications device. A time-averaged SAR is computed over a predefined time window using past transmitter power levels with minimum transmitter power equal to reserve transmitter power for any time interval. Based on the time-averaged SAR a maximum allowable transmitter power for a future fixed time interval is determined. The communication device then transmits at a power equal to or less than the maximum allowable transmitter power. The communication device may back off from high transmitter power to a reserve transmitter power when calculated time-averaged SAR approaches the SAR limit. When old high power transmissions expire, the communication device gains SAR margin and may then transmit at high power. The apparatus comprises: at least one antenna, a transmitter in communication with a power supply, a receiver, a timer in communication with a processor, and a memory.

    CONTROLLING CURRENT FLOW PATH IN WIRELESS ELECTRIC VEHICLE CHARGING SYSTEMS FOR MITIGATING RF RADIATED EMISSIONS
    6.
    发明申请
    CONTROLLING CURRENT FLOW PATH IN WIRELESS ELECTRIC VEHICLE CHARGING SYSTEMS FOR MITIGATING RF RADIATED EMISSIONS 审中-公开
    控制无线电动车辆充电系统中的电流流动路径，以减少射频辐射发射

    公开(公告)号：US20150197155A1

    公开(公告)日：2015-07-16

    申请号：US14489386

    申请日：2014-09-17

    Applicant: QUALCOMM Incorporated

    Inventor： Lin Lu ,  Paul Guckian ,  Jagadish Nadakuduti

    IPC: B60L11/18

    CPC classification number: B60L11/182 ,  B60L53/12 ,  B60L2270/147 ,  H02J50/90 ,  Y02T10/7005 ,  Y02T10/7072 ,  Y02T90/122 ,  Y02T90/14

    Abstract: This disclosure provides systems, methods and apparatus for mitigating electromagnetic radiation emissions. In one aspect, a power transfer device of a wireless electric vehicle charging (WEVC) system is provided. The power transfer device includes a ferrite material and at least one electrically conductive coil. The ferrite material and the at least one coil are configured to wirelessly transfer energy either from or to a second power transfer device of the WEVC system. The power transfer device further includes at least one shield comprising a plurality of electrically conducting regions and one or more electrically insulating regions. The plurality of electrically conducting regions and one or more electrically insulating regions are configured to mitigate electromagnetic radiation emissions from the WEVC system that do not contribute to the wireless power transfer between the at least one electrically conductive coil and the second power transfer device.

    Abstract translation: 本公开提供了用于减轻电磁辐射发射的系统，方法和装置。 一方面，提供了一种无线电动车辆充电（WEVC）系统的电力传送装置。 功率传递装置包括铁氧体材料和至少一个导电线圈。 所述铁氧体材料和所述至少一个线圈被配置为从WEVC系统的第二电力传送装置或从所述WEVC系统的第二电力传送装置无线地传输能量。 功率传输装置还包括至少一个屏蔽，其包括多个导电区域和一个或多个电绝缘区域。 多个导电区域和一个或多个电绝缘区域被配置为减轻来自WEVC系统的电磁辐射发射，其不对至少一个导电线圈和第二功率传输装置之间的无线功率传输有贡献。

    COMPLIANCE ASSESSMENT OF HUMAN EXPOSURE FROM WIRELESS ELECTRIC VEHICLE CHARGING SYSTEM
    7.
    发明申请
    COMPLIANCE ASSESSMENT OF HUMAN EXPOSURE FROM WIRELESS ELECTRIC VEHICLE CHARGING SYSTEM 有权
    无线电动车辆充电系统人员接触的合规评估

    公开(公告)号：US20150177302A1

    公开(公告)日：2015-06-25

    申请号：US14574095

    申请日：2014-12-17

    Applicant: QUALCOMM Incorporated

    Inventor： Lin Lu ,  Jagadish Nadakuduti ,  Paul Guckian

    IPC: G01R29/08

    CPC classification number: G01R29/0878 ,  B60L3/12 ,  B60L11/182 ,  B60L11/1838 ,  B60L2230/10 ,  B60L2260/44 ,  B60L2270/147 ,  G01R29/0814 ,  G01R29/0857 ,  Y02T10/7005 ,  Y02T10/7088 ,  Y02T90/121 ,  Y02T90/122 ,  Y02T90/128 ,  Y02T90/14 ,  Y02T90/163

    Abstract: This disclosure provides systems, methods and apparatus for assessing electromagnetic exposure. In one aspect an apparatus is provided. The apparatus includes at least a first circuit configured to calculate electromagnetic exposure of at least a portion of at least one human in proximity to a wireless electric vehicle charging system. The portion of the at least one human is modeled by at least one homogeneous phantom model having dielectric properties that are representative of human tissue. The apparatus further includes at least a second circuit configured to scale the calculated electromagnetic exposure to simulate an electromagnetic exposure based on an inhomogeneous anatomical model of the portion of the at least one human.

    Abstract translation: 本公开提供了用于评估电磁辐射的系统，方法和装置。 在一个方面，提供一种装置。 该装置至少包括第一电路，其被配置为计算接近无线电动车辆充电系统的至少一个人的至少一部分的电磁辐射。 至少一个人的部分由具有代表人体组织的介电性质的至少一个均匀体模型建模。 该装置还包括至少第二电路，其被配置为基于所述至少一个人的该部分的不均匀解剖模型来缩放所计算的电磁暴露以模拟电磁暴露。

    Efficient determination of RF exposure for MIMO transmitters
    8.
    发明授权
    Efficient determination of RF exposure for MIMO transmitters 有权

    公开(公告)号：US11923919B1

    公开(公告)日：2024-03-05

    申请号：US17952169

    申请日：2022-09-23

    Applicant: QUALCOMM Incorporated

    Inventor： Jagadish Nadakuduti ,  Lin Lu ,  Paul Guckian

    IPC: H04B7/0413 ,  H04B17/382 ,  H04B17/391

    CPC classification number: H04B7/0413 ,  H04B17/382 ,  H04B17/3911

    Abstract: Aspects of the present disclosure facilitate assessment of radio frequency (RF) exposure from a wireless device supporting multiple-input-multiple-output (MIMO) transmissions using multiple antennas. In certain aspects, MIMO RF exposure distributions for one or more MIMO transmissions are determined and stored in a memory. To assess RF exposure for a MIMO transmission, a processor may retrieve the corresponding MIMO RF exposure distributions from the memory, linearly combine the MIMO RF exposure distributions to obtain a combined MIMO RF exposure distribution, and assess RF exposure compliance based on the combined MIMO RF exposure distribution. In one example, the MIMO RF exposure distribution may include MIMO specific absorption rate (SAR) distributions.

    Apparatus and methods for wireless power transmitter coil configuration
    10.
    发明授权
    Apparatus and methods for wireless power transmitter coil configuration 有权

    公开(公告)号：US10511191B2

    公开(公告)日：2019-12-17

    申请号：US15094801

    申请日：2016-04-08

    Applicant: QUALCOMM Incorporated

    Inventor： Zhe Zhang ,  Jagadish Nadakuduti ,  Lin Lu ,  Paul Guckian

    IPC: H02J50/12 ,  H02J7/02 ,  H01F38/14 ,  H02J50/10

    Abstract: Methods and apparatus are disclosed for wirelessly transmitting power. In one aspect, an apparatus for wireless transmitting power is provided. The apparatus comprises a first coil loop defining a first area, the first coil loop conducting current at a first current value for generating a first magnetic field. The apparatus further comprises a second coil loop surrounding the first coil loop and defining a second area, the second coil loop conducting current at a second current value generating a second magnetic field, wherein a ratio of the first current value to the first area is substantially equal to a ratio of the second current value to the second area.

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