Multiple-tuned circuit and probe for NMR spectrometer

摘要

The inventive tuned circuit and probe for use in a nuclear magnetic resonance (NMR) spectrometer has a balanced resonator circuit incorporated, in contrast to the unbalanced coaxial resonator used in prior art circuitry. Tuning and matching circuits for higher frequencies (HF) are connected in an intermediate position in the balanced circuit. A capacitive tuning element for lower frequencies (LF) is inserted between the balanced resonator and sample coil (1), or in an intermediate position in the resonator circuit.