Magnetic inductive sensing device and method
US11517283B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 2, 2018 |
| Grant date | Dec 6, 2022 |
| Priority date | — |
| Expiry date | Feb 26, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/00
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention provides a magnetic inductive sensing device (30) comprising a loop antenna (10) for inductively coupling with electromagnetic (EM) signals emitted from a medium in response to stimulation of the medium with electromagnetic excitation signals. The device includes an electromagnetic shield (36) element which is arranged such as to intercept electromagnetic signals travelling to or from the antenna. The shield element is formed of conductive material such as to block electrical field components of incident signals but further incorporates a non-conductive gap in the material so as to prevent the formation of eddy currents. A loop of the antenna is broken by an opening, the opening being bridged by a capacitor, and the device comprises a signal processing means which is electrically coupled to the antenna via only a single point of the antenna, located to one side of the opening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.