Patent ID: 6307371
Filing Date: 2001-10-23
Classification: G01R

Abstract:
A probehead for nuclear magnetic resonance measurements, in which at least a first and a second distinct kind nuclei are excited in a magnetic field, comprising:a) a measuring coil cooperating with a sample and being connected toa first terminal for feeding a signal of a first frequency for exciting said first kind of nuclei and/or for receiving a resonance signal emitted by nuclei of said first kind of nuclei; anda second terminal for feeding a signal of a second frequency for exciting said second kind of nuclei and/or for receiving a resonance signal emitted by nuclei of said second kind of nuclei;b) a radio frequency transmission line of predetermined length connected to said measuring coil, said transmission line being bridged at about half of said length by a resonance element,wherein the coupling between said measuring coil, said radio frequency transmission line and said resonance element is set to be overcritical, such that a transmission characteristic of said measuring coil has two maxima with frequencies corresponding to said first and to said second frequency.