Multiple tuning NMR probe
US4742304A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | May 2, 1986 |
| Grant date | May 3, 1988 |
| Priority date | — |
| Expiry date | May 2, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3635
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A multiple tuning NMR probe includes a radio frequency (RF) probe tuned by means of a circuit which creates a multiple pole circuit response in the probe, each of the poles being sufficiently separated from each other as to cause resonance of the probe at distinct frequencies. When tuning for nuclei with resonances substantially apart, this function may be accomplished using a parallel capacitor-inductor (L-C) trap with an impedance matching network. When tuning for nuclei with substantially closely spaced resonances, a tank circuit is used which has a single resonance which is split into two resonances by strongly coupling it to another tank circuit in resonance with the sample coil tank circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.