System for locating an object using an antenna array with partially overlapping coils
US10677910B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 13, 2014 |
| Grant date | Jun 9, 2020 |
| Priority date | — |
| Expiry date | Jun 8, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0672
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system is provided for wirelessly locating objects. The system has a transceiver unit with an antenna array of two partially overlapping coils, which is used in combination with a passive electromagnetic reflector to track or locate the objects. The system is tuned to reflect and receive higher order harmonics of a transmitted signal frequency. The system is reliable in a highly reflective environment with no placement error detection due to reflections. A relatively large distance can be bridged with a minimum power and a small sensitive area to detect the coils, which increase the accuracy to determine the location of the electromagnetic reflector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.