Antenna of an electromagnetic probe for investigating geological formations
US9217809B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 21, 2008 |
| Grant date | Dec 22, 2015 |
| Priority date | — |
| Expiry date | Jan 7, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An antenna 3 of an electromagnetic probe used in investigation of geological formations GF surrounding a borehole WBH comprises a conductive base 31 and an antenna element 32. The conductive base 31 comprises an opened non-resonant cavity 33. The antenna element 32 is embedded in the cavity 33 and goes right through the cavity. The antenna element 32 is isolated from the conductive base 31. The antenna element 32 is coupled to at least one electronic module via a first 34A and a second 34B port, respectively. The electronic module operates the antenna so as to define either a substantially pure magnetic dipole, or a substantially pure electric dipole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.