公开(公告)号：US06784758B2

公开(公告)日：2004-08-31

申请号：US09914947

申请日：2001-12-31

申请人： David John Edwards ,  Alan Peter Jenkins ,  Yit Aun Lim

发明人： David John Edwards ,  Alan Peter Jenkins ,  Yit Aun Lim

IPC分类号： H01P512

CPC分类号： H01P5/16

摘要： A wave device for supporting electromagnetic waves, the device including a first pair of inputs for setting up a first standing wave therebetween a second pair of inputs for setting up a second standing wave therebetween and positioned such that the input signal of each of the first and second pairs of inputs is unaffected by the other of the first and second pairs of inputs and an output positioned so as to receive power from both the first and second standing waves.

摘要翻译： 一种用于支持电磁波的波装置，所述装置包括用于在其间设置第一驻波的第一对输入，用于在其间建立第二驻波并将其定位成使得所述第一和第 第二对输入不受第一和第二输入对中的另一对输入的影响，并且输出被定位成从第一和第二驻波两者接收功率。

公开(公告)号：US07187176B2

公开(公告)日：2007-03-06

申请号：US11053452

申请日：2005-02-08

申请人： Yit Aun Lim ,  Werner E. Maas

发明人： Yit Aun Lim ,  Werner E. Maas

IPC分类号： G01V3/00

CPC分类号： G01R33/3635

摘要： A nuclear magnetic resonance (NMR) probe circuit is used with a sample coil tuned to a primary frequency f1. The circuit is arranged to have a plurality of points of electric field minima at the f1 frequency. One or more additional frequencies may be coupled to the circuit at these points, without interaction with f1. The probe circuit also uses an impedance coupled between two of the minima points that affects the frequency response at the additional frequency or frequencies, without affecting the frequency response at f1. The impedance may be made adjustable to allow tuning of the relative frequency resonances.

摘要翻译： 使用核磁共振（NMR）探针电路，其中调谐到主频率f 1的样本线圈。 电路被布置成在f 1频率具有多个电场最小点。 一个或多个附加频率可以在这些点处耦合到电路，而不与f 1 1相互作用。 探针电路还使用耦合在两个最小点之间的阻抗来影响附加频率或频率处的频率响应，而不会影响f 1的频率响应。 可以使阻抗可调，以便调谐相对频率谐振。

公开(公告)号：US07403007B1

公开(公告)日：2008-07-22

申请号：US11670298

申请日：2007-02-01

申请人： Yit Aun Lim ,  Eckhard Bez ,  Xiaozhong Zhang ,  Werner E. Maas

发明人： Yit Aun Lim ,  Eckhard Bez ,  Xiaozhong Zhang ,  Werner E. Maas

IPC分类号： G01V3/00

CPC分类号： G01R33/3628 ,  G01R33/34007 ,  G01R33/34015 ,  G01R33/34023 ,  G01R33/3403 ,  G01R33/34053 ,  G01R33/3635

摘要： In a nuclear magnetic resonance probe, the sample coil is connected to the RF excitation source via transmission lines that are arranged to generate one or more nodal points at the 1H excitation frequency along their lengths and a balanced magnetic filed profile within the sample coil. Heat exchangers are then connected directly to the inner conductor of the transmission line at these nodal points. The transmission line inner conductors are in direct contact with the sample coil and efficiently cool the coil to cryogenic temperatures without interfering with the 1H resonance or RF profile.

摘要翻译： 在核磁共振探针中，采样线圈经由传输线路连接到RF激发源，传输线被布置成沿着它们的长度在<1 / 2H激励频率处产生一个或多个节点，并且平衡磁 在样品盘管内的外形。 然后，热交换器在这些节点处直接连接到传输线的内导体。 传输线内导体与样品线圈直接接触，并有效地将线圈冷却至低温，而不会干扰<1 H“H谐振或RF分布。

公开(公告)号：US06933725B2

公开(公告)日：2005-08-23

申请号：US10758810

申请日：2004-01-16

申请人： Yit Aun Lim ,  Werner E. Maas

发明人： Yit Aun Lim ,  Werner E. Maas

IPC分类号： G01R33/34 ,  G01R33/36 ,  G01V3/00

CPC分类号： G01R33/3635 ,  G01R33/34092

摘要： A circuit for a nuclear magnetic resonance probe uses three resonators to create resonances intermediate to the resonator resonant frequencies. The circuit is particularly useful for creating magnetic fields for two closely spaced high frequencies, such as those used for the excitation of 1H and 19F. The resonators are arranged in a parallel combination, or the electrical equivalent thereof, with input ports connected to it for inputting the desired high frequency resonances. Admittance inverters may be used to provide isolation between the input ports. Some of the resonators and the admittance inverters may be transmission lines. The transmission lines may have additional ports for additional input signals of lower frequencies located at null points for the frequencies of the signals coupled to the primary input ports. Adjustable dielectric components in the resonator transmission lines may be used for tuning purposes.

摘要翻译： 用于核磁共振探针的电路使用三个谐振器来产生谐振器谐振频率之间的谐振。 该电路对于产生用于两个紧密间隔的高频的磁场特别有用，例如用于激励“1”和“20”的高频。 谐振器以与之相连的输入端口并联组合或其等效电路布置，用于输入期望的高频谐振。 导纳逆变器可用于在输入端口之间提供隔离。 一些谐振器和导纳逆变器可以是传输线。 传输线可以具有用于耦合到主输入端口的信号的频率的位于零点处的较低频率的附加输入信号的附加端口。 谐振器传输线中的可调电介质元件可用于调谐目的。