Mutual inductance NMR RF coil matching device
US4638253A · kind A · utility
67Cited by
2References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1984 |
| Grant date | Jan 20, 1987 |
| Priority date | — |
| Expiry date | Oct 29, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/844
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A matching device uses mutual inductance to couple an NMR radio frequency (RF) coil to an RF power amplifier and RF receiver preamplifier. The device includes a matching coil connected to the RF power amplifier and preamplifier and which is positioned between the NMR RF coil and a decoupling shield in a region where RF flux density, produced by the NMR RF coil, is maximum. This ensures effective coupling to the NMR RF coil and provides a way for adjusting the degree of coupling (hence, input impedance) by varying the area of the matching coil available for intercepting the RF flux.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.