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公开(公告)号：US09925388B2
公开(公告)日：2018-03-27
申请号：US14670214
申请日：2015-03-26
摘要： Devices and methods for directing a magnetic field into a body party of a subject are provided. The devices include at least one electromagnetic coil, a magnetic core or yoke, and a pair of flux concentrators. The flux concentrators are separated by a gap into which the body part fits and through which the flux concentrators focus the magnetic field. The devices allow magnetic fields to be transmitted through the gap with higher intensity at greater distances from the device than possible with previous designs. The methods of using such devices allow the delivery of magnetic fields with higher intensity to the interior of a body part without exposing interposed proximal regions to magnetic fields of unduly high intensity. The devices and methods are useful for deep transcranial magnetic stimulation of the brain to treat various medical conditions.
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公开(公告)号：US20180016157A1
公开(公告)日：2018-01-18
申请号：US15546891
申请日：2016-02-01
发明人： Yajie Chen , Vincent Harris
IPC分类号： C01G51/00 , H01F1/34 , H01F27/255 , C04B35/26 , C04B35/626 , C04B35/634 , C04B35/64 , H01P1/19 , H01P1/38 , H01P1/20 , H01Q1/36
摘要： A Co2Z hexaferrite composition is provided containing molybdenum and one or both of barium and strontium, having the formula (Ba2Sr(3-Z)Co(2+X))MoxFe(y-2x)O41 where x=0.01 to 0.20; y=20 to 24; and z=0 to 3. The composition can exhibit high permeabilities and equal or substantially equal values of permeability and permittivity while retaining low magnetic and dielectric loss tangents and loss factors. The composition is suitable for high frequency applications such as ultrahigh frequency and microwave antennas and other devices.
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公开(公告)号：US20150273233A1
公开(公告)日：2015-10-01
申请号：US14670214
申请日：2015-03-26
摘要： Devices and methods for directing a magnetic field into a body party of a subject are provided. The devices include at least one electromagnetic coil, a magnetic core or yoke, and a pair of flux concentrators. The flux concentrators are separated by a gap into which the body part fits and through which the flux concentrators focus the magnetic field. The devices allow magnetic fields to be transmitted through the gap with higher intensity at greater distances from the device than possible with previous designs. The methods of using such devices allow the delivery of magnetic fields with higher intensity to the interior of a body part without exposing interposed proximal regions to magnetic fields of unduly high intensity. The devices and methods are useful for deep transcranial magnetic stimulation of the brain to treat various medical conditions.
摘要翻译： 提供了用于将磁场引导到对象的身体方的装置和方法。 这些装置包括至少一个电磁线圈，磁芯或磁轭以及一对磁通集中器。 磁通集中器由主体部分配合的间隙分开，磁通集中器通过该间隙聚焦磁场。 这些器件允许磁场在距离器件更远的距离处以更高的强度通过间隙传输，而不是以前的设计。 使用这种装置的方法允许将较高强度的磁场传递到身体部分的内部，而不会将插入的近端区域暴露于过高的强度的磁场。 这些装置和方法可用于脑的深经颅磁刺激以治疗各种医疗状况。
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公开(公告)号：US11705637B2
公开(公告)日：2023-07-18
申请号：US16600292
申请日：2019-10-11
发明人： Vincent Harris
CPC分类号： H01Q15/0086 , C01G49/0036 , C01G49/0054 , C01G49/0072 , H01Q9/0485 , H01Q9/0407
摘要： Magnetodielectric (MD) metamaterials have a magnetodielectric (MD) substrate of a ferrite composition or composite having a characteristic impedance matching an impedance of free space and at least one frequency selective surface (FSS). The FSS has a plurality of frequency selective surface elements disposed in a pattern and supported on the MD substrate. The FSS has a conducting composition and is configured to permit one or more of transmission, reflection, or absorption at a selected resonant frequency or selected frequency band. Articles incorporating magnetodielectric metamaterials are provided.
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公开(公告)号：US10766786B2
公开(公告)日：2020-09-08
申请号：US15546891
申请日：2016-02-01
发明人： Yajie Chen , Vincent Harris
IPC分类号： C04B35/26 , H01F1/34 , C01G51/00 , C04B35/626 , C04B35/634 , H01B1/02 , C01G39/00 , C01G49/00 , C04B35/64 , H01F27/255 , H01P1/19 , H01P1/20 , H01P1/38 , H01Q1/36
摘要： A Co2Z hexaferrite composition is provided containing molybdenum and one or both of barium and strontium, having the formula (Ba2Sr(3-Z)Co(2+X))MoxFe(y-2x)O41 where x=0.01 to 0.20; y=20 to 24; and z=0 to 3. The composition can exhibit high permeabilities and equal or substantially equal values of permeability and permittivity while retaining low magnetic and dielectric loss tangents and loss factors. The composition is suitable for high frequency applications such as ultrahigh frequency and microwave antennas and other devices.
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公开(公告)号：US11211187B2
公开(公告)日：2021-12-28
申请号：US16181298
申请日：2018-11-05
发明人： Yajie Chen , Parisa Andalib , Vincent Harris
摘要： A composite magnetic material has a plurality of grains having a magnetic ferrite phase, grain boundaries surrounding the grains, and a plurality of nanoparticles disposed at the grain boundaries. The nanoparticles of the composite material are both magnetic and electrically insulating, having a magnetic flux density of greater than about 100 mT and an electrical resistivity of at least about 108 Ohm-cm. Also provided is a method of making the composite material. The material is useful for making inductor cores of electronic devices.
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