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Title:
HIGH FREQUENCY MAGNETIC FIELD GENERATING DETECTOR
Document Type and Number:
Japanese Patent JP2003144415
Kind Code:
A
Abstract:

To provide a resonator type high frequency magnetic field generating detector operated with high sensitivity and high frequency, simultaneously synchronizing with two kinds of frequencies.

This high frequency magnetic field generating detector composed of a resonator type coil comprises two guard rings made of conductors formed in approximately cylindrical outer shape and coaxially arranged with a vertical space; a cylindrical dielectric sheet wound around the guard rings; and a pair of conductor sheets arranged to cover the outside of the dielectric sheet. A pair of conductive sheets are provided with vertical band parts extending in the axial direction of a cylinder, wing parts laterally extending to both sides from the upper ends and lower ends of the vertical band parts to cover the outside of two guard rings, and complementary band parts in parallel with the opposed upper side wing parts to connect the vertical band parts to each other so that a high frequency current of low frequency selectively flows on the complementary band part side when the resonator type coil is operated by inductive reactance and that a high frequency current of high frequency selectively flows on the guard ring side when the resonator type coil is operated by capacitive reactance.


Inventors:
IKEDA HIROSHI
Application Number:
JP2001000351490
Publication Date:
May 20, 2003
Filing Date:
November 16, 2001
Export Citation:
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Assignee:
JEOL LTD
International Classes:
G01R33/34; A61B5/055; (IPC1-7): A61B5/055; G01R33/34