公开(公告)号：US4736161A

公开(公告)日：1988-04-05

申请号：US870750

申请日：1986-06-04

申请人： Claude Prevot ,  Robert Encellaz ,  Rene Chesneau

发明人： Claude Prevot ,  Robert Encellaz ,  Rene Chesneau

IPC分类号： G01R33/36 ,  G01R33/20

CPC分类号： G01R33/3453 ,  G01R33/3628 ,  G01R33/5659 ,  G01R33/3678 ,  G01R33/422

摘要： A high frequency antenna is provided for an apparatus measuring nuclear magnetic resonance, of the type whose radiating means comprise conductors forming high frequency resonators with a metal casing. They are frequency tuned by adjustment capacitors situated at their ends. For simplifying the frequency tuning of two paired resonators through which flow currents in phase opposition, it is proposed to join together galvanically two ends of these two resonators by a high frequency line section whose length is substantially equal to half the wave length of the energization wave to be emitted. The frequency matching of the antenna may be made by adjusting simultaneously all the adjustment capacitors by means of a common control knob. Coupling of the energization energy is provided magnetically in the middle of this high frequency line section.

摘要翻译： 为测量核磁共振的装置提供高频天线，其辐射装置包括形成具有金属外壳的高频谐振器的导体。 它们由位于其端部的调整电容器调谐。 为了简化相位相对流动电流的两个配对谐振器的频率调谐，建议通过长度大致等于通电波的波长的一半的高频线路部分将这两个谐振器的电流两端连接在一起 被排出。 天线的频率匹配可以通过通过公共控制旋钮同时调节所有调节电容器来进行。 在该高频线路部分的中间磁化地提供通电能的耦合。

公开(公告)号：US4001833A

公开(公告)日：1977-01-04

申请号：US619356

申请日：1975-10-03

申请人： Rene Chesneau ,  Jean-Marc Martin

发明人： Rene Chesneau ,  Jean-Marc Martin

IPC分类号： H01Q9/18 ,  H01Q9/34

CPC分类号： H01Q9/18

摘要： A whole wave antenna is placed on an insulating support and has its feed input located a little above its middle. In order to reduce secondary lobes inductive reactances are serially inserted in the antenna on each side of its feed input so as to produce a rapid rotation with inversion of the phase of the currents on each side of the feed input.

公开(公告)号：US4001832A

公开(公告)日：1977-01-04

申请号：US619038

申请日：1975-10-02

申请人： Rene Chesneau ,  Jean-Marc Martin

发明人： Rene Chesneau ,  Jean-Marc Martin

IPC分类号： H01Q9/18 ,  H01Q25/00 ,  H01Q9/16 ,  H01Q9/34

CPC分类号： H01Q25/00 ,  H01Q9/18

摘要： A vertical grounded antenna is supplied at one third of its height. The antenna is substantially a whole wave antenna and, in order to reduce the secondary lobes of the vertical pattern of said antenna, its height is so determined as to produce an inversion of the sign of the phase of the current on each side of the feed input.

公开(公告)号：US4686473A

公开(公告)日：1987-08-11

申请号：US752874

申请日：1985-07-08

申请人： Rene Chesneau ,  Claude Prevot

发明人： Rene Chesneau ,  Claude Prevot

IPC分类号： G01R33/34 ,  G01R33/36 ,  G01R33/20

CPC分类号： G01R33/34076 ,  G01R33/34007 ,  G01R33/3628 ,  G01R33/422

摘要： The invention provides a device for creating an excitation field in an apparatus using nuclear magnetic resonance. The structure for creating this field comprises a number of conductors spaced evenly apart at the periphery of a circular cylinder. What characterizes the invention is that, for producing a homogeneous field inside this cylinder, it is sufficient to cause a current to flow through these conductors whose intensity is proportional to the cosine of the angle which locates this conductor with respect to a reference axis system.

摘要翻译： 本发明提供一种用于在使用核磁共振的装置中产生激励场的装置。 用于产生该场的结构包括在圆柱体的圆周处间隔开的多个导体。 本发明的特征在于，为了在该气缸内产生均匀场，足以使电流流经这些导体，其强度与定位该导体相对于参考轴系的角度余弦成正比。