Antenna for miniature implanted medical device
US6804561B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 2001 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | Feb 21, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/37205
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An improved antenna for use with an implantable microdevice, such as a microstimulator or microsensor, comprises a loop antenna on the case of the microdevice. The antenna receives data transmitted from an external device, and transmits data to an external device. Such a loop antenna may be formed from two cylindrical sections separated by an insulating material on the case of the microdevice, or by separating a metal cylinder into two parallel semi-cylinders separated by an insulating material. A tuning circuit comprising capacitors and/or varactors is used to obtain resonance in the loop antenna, thus creating a sufficiently large effective antenna aperture. In a preferred embodiment, the electrodes of the microdevice are modified to both perform their primary task of tissue stimulation and to perform a secondary task as the radiating elements of a loop antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.