Multiple-tuned circuit and probe for NMR spectrometer
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United States of America Patent
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Feb 3, 2004
Grant Date -
Nov 21, 2002
app pub date -
Apr 8, 2002
filing date -
Apr 10, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A multiple-tuned circuit and a probe for use in a nuclear magnetic resonance (NMR) spectrometer. The multiple-tuned circuit having improved power capacity, thus permitting injection of high electric power. The multiple-tuned circuit and probe improve the resonance frequencies at higher and lower frequencies. Instead of the prior art coaxial resonator that is an unbalanced circuit, a balanced resonator circuit is used. A tuning circuit and a matching circuit for a higher frequency is connected in an intermediate position in the balanced resonator circuit. A tuning capacitive element for a lower frequency is inserted between the balanced resonator circuit and a sample coil or in an intermediate position in the balanced resonator circuit.
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