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    • 7. 发明公开
    • ARTIFICIALLY STRUCTURED UNIT CELLS PROVIDING LOCALIZED B1 MAGNETIC FIELDS FOR MRI AND NMR DEVICES
    • 人工结构化基本单元FOR PROVIDING LOCAL B1-磁场中是MR和NMR DEVICES
    • EP3169230A1
    • 2017-05-24
    • EP15821987.3
    • 2015-07-16
    • Elwha LLC
    • SMITH, David R.DRISCOLL, TomURZHUMOV, Yaroslav A.
    • A61B5/055
    • G01R33/34046G01R33/288G01R33/345
    • Described embodiments include a system, apparatus, and method. An apparatus includes an array of at least two groups of at least two artificially structured electromagnetic unit cells. Each group of the at least two groups configured to be respectively linearly arranged with respect to the z-axis of the bore of MRI or NMR device. Each group of the at least two groups of artificially structured electromagnetic unit cells configured to transform an incident pulse of radiofrequency electromagnetic waves into a pulse of radiofrequency magnetic field B1 orientated transverse to a segment of the z-axis and spatially proximate to the group. The apparatus includes a radiofrequency electromagnetic wave conducting structure configured to selectably distribute a received pulse of radiofrequency electromagnetic waves to a group of the at least two groups.
    • 描述的实施例包括一个系统,装置和方法。 一种装置,包括至少两个阵列的至少两个基团的人造结构电磁单元电池组成。 配置的至少两组的每一组被分别线性地相对于MRI或NMR设备的孔的z轴地布置。 每个组的至少两个组人工结构化电磁单元电池的配置以变换到射频电磁波的入射脉冲进入的高频磁场B1取向横向的脉冲于z轴的线段上和空间上邻近的基团的。 该装置包括被配置为射频电磁波的接收脉冲可选择分配给一组的至少两个组的一射频电磁波传导结构。
    • 8. 发明申请
    • ACOUSTIC DIFFRACTIVE CONCENTRATORS
    • WO2020191335A1
    • 2020-09-24
    • PCT/US2020/023964
    • 2020-03-20
    • ELWHA LLC
    • URZHUMOV, Yaroslav A.
    • H01Q3/44H01Q21/06H01Q21/29
    • An acoustically-transmissive structure with a three-dimensional distribution of subwavelength acoustic refractive indices to diffractively concentrate acoustic waves incident on an effective aperture of the structure from a range of incidence directions between a minimum acceptance angle and a maximum acceptance angle to a smaller effective aperture. In a specific embodiment, an acoustic system may include a plurality of electroacoustic transducers and an acoustic structure having a first, larger effective aperture with a three-dimensional distribution of acoustic refractive indices. The acoustic structure diffractively concentrates acoustic waves received at a first set of angles of incidence to a first electroacoustic transducer and diffractively concentrates acoustic waves received at a second set of angles of incidence to a second electroacoustic transducer. The effective apertures of each of the first and second electroacoustic transducers has a smaller effective aperture relative to the larger effective aperture of the acoustic structure.
    • 9. 发明申请
    • SYSTEM WIRELESSLY TRANSFERRING POWER TO A TARGET DEVICE OVER A TESTED TRANSMISSION PATHWAY
    • 经过测试的传输路径,系统将无线传输功率传输到目标设备
    • WO2015095217A1
    • 2015-06-25
    • PCT/US2014/070645
    • 2014-12-16
    • ELWHA LLC
    • CHEN, Pai-YenDRISCOLL, TomEBADI, SiamakHUNT, John DesmondLANDY, Nathan IngleMACHADO, MelroyPERQUE, Milton, Jr.SMITH, David R.URZHUMOV, Yaroslav A.
    • G01R29/10
    • H01Q3/00H01Q3/247H01Q3/46H01Q15/002H01Q15/148H01Q19/067H02J50/23H02J50/60H02J50/80
    • Described embodiments include a system, method, and apparatus. A system includes an antenna comprising a sub-Nyquist holographic aperture configured to define selectable arbitrary complex radiofrequency electromagnetic fields on a surface of the antenna. A path analysis engine tests power transmission pathways from the antenna to a target device located in an environment within a space radiateable by the antenna. The environment includes a human being. An optimization circuit selects responsive to the tested power transmission pathways a power transmission regime. The regime includes an electromagnetic radiation pattern shaped to transfer radiofrequency electromagnetic power from the antenna to the target device without exceeding a radiation exposure limit for humans. A gain definition circuit selects a complex radiofrequency electromagnetic field implementing the selected power transmission regime from the at least two selectable, complex radiofrequency electromagnetic fields. An antenna controller defines the selected arbitrary complex radiofrequency electromagnetic field in the sub-Nyquist holographic aperture.
    • 所描述的实施例包括系统,方法和装置。 一种系统包括天线,其包括被配置为在天线的表面上限定可选择的任意复合射频电磁场的子奈奎斯特全息孔。 路径分析引擎测试从天线到位于由天线辐射的空间内的环境中的目标设备的电力传输路径。 环境包括人类。 优化电路根据测试的电力传输路径选择电力传输方式。 该装置包括形成为将射频电磁功率从天线传送到目标装置的电磁辐射图,而不超过人的辐射暴露极限。 增益定义电路从所述至少两个可选择的复合射频电磁场中选择实现所选择的功率传输方案的复合射频电磁场。 天线控制器定义了亚奈奎斯特全息孔径中选定的任意复合射频电磁场。
    • 10. 发明申请
    • ACOUSTIC-ELECTROMAGNETIC TOMOGRAPHY
    • WO2019213375A1
    • 2019-11-07
    • PCT/US2019/030368
    • 2019-05-02
    • ELWHA LLC
    • URZHUMOV, Yaroslav A.
    • A61B5/00
    • In one embodiment, a superlens is used to sub-diffraction-limit focus a magnetic field within a volume. A local magnetic field intensity maximum, or "hotspot," is thereby created that is focused in two spatial directions substantially parallel to the superlens. The hotspot extends from the superlens through one or more coplanar layers of the volume. An electric field is superimposed over the magnetic field within the volume to be imaged. The superposition of electric and magnetic fields induces localized Lorentz forces. The modulation of the magnetic and/or electric field causes the portion of the volume in the hotspot to vibrate and emit acoustic signals at a frequency suitable for acoustic imaging. An acoustic transducer receives the emitted acoustic signals. The location from which the acoustic signals are emitted is constrained in two dimensions by the superlens. Time gating the acoustic signals received from the hotspot is used to localize the received acoustic signals in the third dimension.