Radiation applicator
US7118590B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 25, 2000 |
| Grant date | Oct 10, 2006 |
| Priority date | — |
| Expiry date | Feb 25, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2018/1861
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Radiation applicators comprise an elongate device having an antenna (240, 340) at their tip for coupling radiation into biological tissue and a dielectric body (250, 350) surrounding the antenna so as to encompass substantially the whole of the near-field region of the antenna and/or to enhance transmission of radiation in the forward direction. The body (250, 350) may be cylindrical with the antenna (240, 340) along its axis. The antenna may be λ/2 in length and λ/2 in radius. The tip (270) of the antenna (240) may be rounded hemispherical with radius λ/2 to enhance forward transmission of radiation. The dielectric constant (ε) of the body (250, 350) is as high as possible to reduce its diameter at a desired operating frequency but may be matched to the surrounding tissue by another layer of dielectric material (380) with a value (ε) intermediate that of the core (360) of the body (350) and the tissue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.