Control of tranmsitting and receving antenna properties to reduce electromagnetic coupling
US11171684B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2020 |
| Grant date | Nov 9, 2021 |
| Priority date | — |
| Expiry date | Jun 5, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/1009
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An NMR measurement apparatus includes a transmitting antenna including a transmitter coil, a capacitor, a dissipating component and a restricting component, and a receiving antenna physically separated from the transmitting antenna. A processor is configured to apply a drive signal at a first voltage level to generate a transmission signal having a selected transmission frequency, where the receiving antenna is deactivated during generation, connect the dissipating component to the transmitter coil to dissipate stored energy in the transmitter coil, connect the restricting component to the transmitter coil to restrict the transmitting antenna to a second voltage level smaller than the first voltage level and based on a voltage of NMR signals from the sensitive volume, activate the receiving antenna and detect a NMR signal, where the restricting component is connected to the transmitter coil and restricts the transmitting antenna during the activating and the detecting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.