Semi-rigid airborne electromagnetic transmitter antenna system
US9903976B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 2015 |
| Grant date | Feb 27, 2018 |
| Priority date | — |
| Expiry date | Aug 18, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2003/084
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for airborne electromagnetic surveying is provided, comprising a central hub defining an equatorial plane, a transmitter loop, and radials connecting the hub to the transmitter loop. The loop generally lies in a plane during flight, and comprises loop sections, some of which are connected with flexible joints allowing the loop to flex out of the plane during lift-offs and landings. A loop section comprises current conducting elements connected to current conducting elements of adjacent loop sections forming a transmitter loop circuit. A radial connects to the hub at a point that is substantially offset from the transmitter loop plane, thereby contributing to the stability of the transmitter loop connection point in an up-down direction relative to the hub. Additionally, a loop section comprising rigid conductive elements retained in a spaced-apart relationship by a frame member is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.