Wireless data transmission using polarised electromagnetic radiation
US11569579B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2019 |
| Grant date | Jan 31, 2023 |
| Priority date | — |
| Expiry date | Oct 6, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/0026
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A wireless data transmission apparatus is disclosed, comprising one or more antennas for transmitting data as polarised electromagnetic radiation, and polarisation control means for controlling an axial ratio and a tilt angle of the polarised electromagnetic radiation such that the axial ratio and tilt angle conveys information about the data being transmitted. A corresponding wireless data receiving apparatus is also disclosed. In some embodiments, the one or more antennas comprises a patch antenna, and the polarisation means may comprise a mechanism for varying an electrical length of the angled slot. By utilising the tilt angle and axial ratio of polarised electromagnetic radiation to convey information to the receiver, the spectral efficiency of the system can be increased. A further increase in spectral efficiency may be obtained by using the polarisation control means to modulate first and second carrier waves, and transmitting different data on the first and second carrier waves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.