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11. 发明授权

US06933725B2 NMR probe circuit for generating close frequency resonances 有权
标题翻译：用于产生近似频率谐振的NMR探针电路
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。

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