Vector measuring aerial arrays for magnetic induction communication systems
US6134420A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1998 |
| Grant date | Oct 17, 2000 |
| Priority date | — |
| Expiry date | Jan 22, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/77
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A wireless communication system automatically aligns a magnetic induction field to establish a two-way communication link between a stationary base unit located, for example, at a user's work station, and a remote unit worn by the user, for example, as a headset or body pack. At any point in time, the base unit and the remote unit have an arbitrary relative orientation to each other. The base unit senses this orientation, then aligns the magnetic induction field to maintain the communication link with the remote unit. In one embodiment, the base unit preferably includes an aerial array having a number of mutually orthogonal windings. Each winding produces a signal when a magnetic induction field generated by the remote unit passes through the base unit. A selector module selects the longitudinal axis of the winding with the strongest signal as an approximation of a direction vector defining the orientation of the magnetic induction field relative to the base unit. In another embodiment, the base unit preferably includes an aerial array comprising three orthogonal windings disposed about a spherical core. A selector module selects one or more windings for transmitting a magnetic fie…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.