Communication system, a primary radio station, a secondary radio station, and a communication method
US6195559A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1998 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Nov 19, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/28
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A communication system has a primary radio station and a portable radio station. The primary radio station communicates with the portable radio station. The portable radio station is freely three-dimensionally orientable with respect to a fixed coordinate system. The portable radio station has a transceiver, a controllable antenna structure, and a beam directional controller for three-dimensionally controlling a beam radiated by the controllable antenna structure. The portable radio station further has a three-dimensional geometric sensor for three-dimensionally sensing a local magnetic field. The beam is controlled on the basis of the sensed local magnetic field. Beam control is such that, after an initial adjustment of the beam into a given direction with respect to a main axis of the portable radio station, the controllable antenna structure substantially retains the beam directed into the given direction, irrespective of a subsequent orientation of the portable radio station with respect to the fixed coordinate system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.