Communications system
US6204810A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 9, 1997 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | May 9, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B14/008
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A communications system in which a communications channel is defined at least in part by an electromagnetic wave having a carrier frequency and an electric field vector, the extremity of which traces a non-linear periodic path at a second frequency between the carrier frequency and zero from the perspective of an observer looking into the axis of propagation of the wave. The transmitter of the communications system launches a wave having such characteristics and modulated with information in a suitable manner. The receiver of the communications system is sensitive to the periodic path and second frequency. Either the periodic path, the second frequency, or both provide selectivity that can be used to define multiple communications channels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.