公开(公告)号：US20230246321A1

公开(公告)日：2023-08-03

申请号：US18118973

申请日：2023-03-08

申请人： Amherst College

发明人： Jonathan R. Friedman

IPC分类号： H01P7/06 ,  G01R33/343 ,  G01R33/60 ,  G06N10/00 ,  H01P7/08

CPC分类号： H01P7/06 ,  G01R33/343 ,  G01R33/60 ,  G06N10/00 ,  H01P7/08

摘要： Improved loop-gap resonators applicable to Electron-Spin Resonance spectroscopy and to quantum computing employ interdigitated capacitor structures to dramatically increase the capacitance of the resonator, along with corresponding decreases in loop size to enable measurements of small-volume samples or individual quantum bits (qubits). The interdigitated-capacitor structures are designed to minimize parasitic inductance.

公开(公告)号：US10884089B2

公开(公告)日：2021-01-05

申请号：US16443126

申请日：2019-06-17

申请人： Boston University

发明人： Xin Zhang ,  Stephan Anderson ,  Guangwu Duan ,  Xiaoguang Zhao

IPC分类号： G01R33/56 ,  G01R33/36 ,  G01R33/343 ,  A61B5/055 ,  G01R33/3415

摘要： A passive apparatus including a plurality of resonators increases signal-to-noise ratio of radiofrequency signals emitted by a specimen and captured by an MRI machine. The apparatus increases the magnetic field component of radiofrequency energy during signal transmission from the MRI machine to the specimen, and/or reception of signals from the specimen to the MRI machine. Moreover, the apparatus enhances specimen safety by substantially avoiding unwanted generation of an electric field, or an increase in the electric field component of the RF energy. Use of the apparatus improves the images generated by the MRI machine, and/or reduces the time necessary for the MRI machine to capture the image.

公开(公告)号：US20190302209A1

公开(公告)日：2019-10-03

申请号：US16443126

申请日：2019-06-17

申请人： Boston University

发明人： Xin Zhang ,  Stephan Anderson ,  Guangwu Duan ,  Xiaoguang Zhao

IPC分类号： G01R33/56 ,  A61B5/055 ,  G01R33/343 ,  G01R33/3415 ,  G01R33/36

摘要： A passive apparatus including a plurality of resonators increases signal-to-noise ratio of radiofrequency signals emitted by a specimen and captured by an MRI machine. The apparatus increases the magnetic field component of radiofrequency energy during signal transmission from the MRI machine to the specimen, and/or reception of signals from the specimen to the MRI machine. Moreover, the apparatus enhances specimen safety by substantially avoiding unwanted generation of an electric field, or an increase in the electric field component of the RF energy. Use of the apparatus improves the images generated by the MRI machine, and/or reduces the time necessary for the MRI machine to capture the image.

公开(公告)号：US20180356483A1

公开(公告)日：2018-12-13

申请号：US16002458

申请日：2018-06-07

申请人： Trustees of Boston University

发明人： Xin Zhang ,  Stephan Anderson ,  Guangwu Duan ,  Xiaoguang Zhao

IPC分类号： G01R33/56 ,  A61B5/055 ,  G01R33/343 ,  G01R33/36

CPC分类号： G01R33/5608 ,  A61B5/055 ,  G01R33/343 ,  G01R33/3628

摘要： A passive apparatus including a plurality of resonators increases signal-to-noise ratio of radiofrequency signals emitted by a specimen and captured by an MRI machine. The apparatus increases the magnetic field component of radiofrequency energy during signal transmission from the MRI machine to the specimen, and/or reception of signals from the specimen to the MRI machine. Moreover, the apparatus enhances specimen safety by substantially avoiding unwanted generation of an electric field, or an increase in the electric field component of the RF energy. Use of the apparatus improves the images generated by the MRI machine, and/or reduces the time necessary for the MRI machine to capture the image.

公开(公告)号：US09293890B2

公开(公告)日：2016-03-22

申请号：US14403209

申请日：2013-05-24

申请人： IMPERIAL INNOVATIONS LIMITED

发明人： Jonathan David Baxendale Breeze ,  Neil McNeill Alford

IPC分类号： H01S1/02 ,  H01S4/00 ,  G01R33/343 ,  H01P7/08

CPC分类号： H01S4/00 ,  G01R33/343 ,  H01P7/08 ,  H01S1/02

摘要： A device for, and a method of, generating stimulated emission of microwave or radio frequency electromagnetic radiation, utilize a resonator structure, an input source of microwave or radio frequency electromagnetic radiation to be amplified, and an input of energy arranged to pump the resonator structure and thereby cause amplification of the electromagnetic radiation. The configuration of the resonator structure and/or the materials used in its construction give rise to an increase in the magnetic Purcell factor of the resonator structure.

摘要翻译： 用于产生微波或射频电磁辐射的受激发射的装置和方法利用谐振器结构，放大微波或射频电磁辐射的输入源，以及布置成泵浦谐振器结构的能量输入 从而引起电磁辐射的放大。 在其结构中使用的谐振器结构和/或材料的配置导致谐振器结构的磁性Purcell因子的增加。

公开(公告)号：US08829904B2

公开(公告)日：2014-09-09

申请号：US13366925

申请日：2012-02-06

申请人： James R. White ,  Christopher John White

发明人： James R. White ,  Christopher John White

IPC分类号： G01V3/00 ,  G01R33/343 ,  H01P7/06 ,  G01N24/10 ,  G01R33/345 ,  G01N24/08 ,  G01R33/30 ,  G01R33/34 ,  G01R33/60

CPC分类号： G01N24/10 ,  G01N24/08 ,  G01R33/307 ,  G01R33/34 ,  G01R33/343 ,  G01R33/345 ,  G01R33/60 ,  H01P7/06

摘要： A method of and miniaturized apparatus adapted for in-situ measurement of degradation of automotive fluids and the like by micro-electron spin resonance (ESR) spectrometry, wherein the use of a modulated constant magnetic field in an RF resonating variable frequency microwave cavity resonator through which a fluid sample is passed, enables direct detection of molecular changes in such fluid sample resulting from fluid degradation during use.

摘要翻译： 一种适用于通过微电子自旋共振（ESR）光谱法原位测量汽车流体等的劣化的方法和小型化装置，其中在RF谐振可变频率微波谐振腔谐振器中使用调制恒定磁场 流体样品通过，可以直接检测在使用过程中流体降解导致的这种流体样品中的分子变化。

公开(公告)号：US5739690A

公开(公告)日：1998-04-14

申请号：US627263

申请日：1996-04-04

申请人： George A. Rinard

发明人： George A. Rinard

IPC分类号： G01V3/00 ,  G01N24/10 ,  G01R33/34 ,  G01R33/343 ,  G01R33/36 ,  G01R33/60

CPC分类号： G01R33/60 ,  G01R33/343 ,  G01R33/3635

摘要： A resonator structure including a first resonator having a first resonator loop formed by a hollow channel with conductive walls and a second resonator having a second resonator loop formed by a hollow channel with conductive walls. The first resonator loop and the second resonator loop intersect so that the first and second resonator loops are substantially shielded to prevent coupling of high frequency energy between the first and second resonator loops. A sample is placed in a space defined by the intersection of the first and second resonator loops. High frequency energy is applied to the first resonator. The angle at which the second resonator loop intersects the first resonator loop is selected to substantially decouple the first resonator from the second resonator. A detector circuit detects the high frequency energy in the second resonator loop and supplies the detected signal for subsequent analysis.

摘要翻译： 一种谐振器结构，包括具有由具有导电壁的中空通道形成的第一谐振器回路的第一谐振器和具有由具有导电壁的中空通道形成的第二谐振器回路的第二谐振器。 第一谐振器环路和第二谐振器环路相交，使得第一和第二谐振器回路基本上被屏蔽，以防止第一和第二谐振器回路之间的高频能量耦合。 将样品放置在由第一和第二谐振器回路相交处限定的空间中。 向第一谐振器施加高频能量。 选择第二谐振器环路与第一谐振器环路相交的角度以使第一谐振器与第二谐振器基本上分离。 检测器电路检测第二谐振器回路中的高频能量，并提供检测信号用于后续分析。

公开(公告)号：US5424644A

公开(公告)日：1995-06-13

申请号：US83652

申请日：1993-06-25

申请人： Heinz D. Zeiger

发明人： Heinz D. Zeiger

IPC分类号： G01R33/30 ,  G01R33/343 ,  G01R33/38 ,  G01R33/20

CPC分类号： G01R33/343 ,  G01R33/30 ,  G01R33/3808

摘要： A probehead is described for carrying out magnetic resonance imaging measurements on a sample. The sample is located inside a probehead transmission/detection unit in a magnetic field of a predetermined direction. Moreover, the sample may be turned relative to the direction about at least one axis. The transmission/detection unit is a split ring resonator. The split ring resonator may be turned about its resonator axis and may be coupled by coupling means for coupling rf energy to or from, respectively, the split ring resonator. The coupling means are arranged in a stationary position relative to the split ring resonator and are coaxial to the resonator axis.

摘要翻译： 描述了用于对样品进行磁共振成像测量的探头。 样品位于预定方向的磁场内的探头传输/检测单元内。 此外，样品可以相对于围绕至少一个轴线的方向转动。 发送/检测单元是分离环谐振器。 分裂环谐振器可以围绕其谐振器轴线转动，并且可以通过用于将rf能量分别耦合到分离环谐振器或从分离环谐振器耦合的耦合装置耦合。 耦合装置相对于开环谐振器布置在静止位置，并且与谐振器轴线同轴。

公开(公告)号：US4841249A

公开(公告)日：1989-06-20

申请号：US105003

申请日：1987-10-06

申请人： Wilhelm Duerr ,  Hartwig Ingwersen ,  Norbert Krause ,  Ralph Oppelt

发明人： Wilhelm Duerr ,  Hartwig Ingwersen ,  Norbert Krause ,  Ralph Oppelt

IPC分类号： G01R33/32 ,  A61B5/055 ,  G01R33/341 ,  G01R33/343

CPC分类号： G01R33/341 ,  G01R33/343

摘要： A surface resonator for use in nuclear magnetic resonance tomography is a single turn loop of ribbon-like electrical conductor having spaced ends facing each other which form a capacitor whose capacitance determines the resonant frequency. The loop of ribbon-like conductor is shaped to conform substantially to the generated surface of a truncated cone. The ends of the loop may be in the form of spaced plates for providing the necessary capacitance, or may be connected by one or more discrete component capacitors.

摘要翻译： 用于核磁共振断层摄影的表面谐振器是带状电导体的单回路，其具有彼此面对的间隔开的端部，其形成电容器，其确定谐振频率。 带状导体的环形被成形为基本上符合产生的截头圆锥形表面。 环的端部可以是间隔开的板的形式，用于提供必要的电容，或者可以由一个或多个分立元件电容器连接。

公开(公告)号：US4752736A

公开(公告)日：1988-06-21

申请号：US888074

申请日：1986-07-22

申请人： Mitsuaki Arakawa ,  Lawrence E. Crooks ,  William H. Harrison

发明人： Mitsuaki Arakawa ,  Lawrence E. Crooks ,  William H. Harrison

IPC分类号： G01R33/34 ,  G01R33/343 ,  G01R33/20

CPC分类号： G01R33/343 ,  G01R33/34046

摘要： A quadrature detection MRI radio frequency coil includes plural axially-extending conductive legs. At least two of the legs include breaks in conductivity at their mid-point with circumferentially extending inner-bridge conductors connected thereacross to which RF input/output feed connections are conveniently made so as to achieve a center fed coil structure, open at both ends. Other axially-extending legs may also include conductive breaks with capacitive coupling thereacross and circumferentially extending outer-bridges between the outer or distal ends of the legs may also include breaks in conductivity with capacitive coupling thereacross.

摘要翻译： 正交检测MRI射频线圈包括多个轴向延伸的导电腿。 至少两条腿在其中点处包括导电断裂，其周向延伸的内桥导体连接到该RF导线上，便于制造RF输入/输出馈电连接，以便实现在两端开放的中心馈电线圈结构。 其他轴向延伸的腿还可以包括导电断裂，其间具有电容耦合，并且在腿部的外端或远端之间的周向延伸的外桥还可以包括导电性断裂，并且电容耦合在其上。