Electricity distribution and/or power transmission network and filter for telecommunication over power lines
US5933071A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 21, 1997 |
| Grant date | Aug 3, 1999 |
| Priority date | — |
| Expiry date | Feb 21, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S40/121
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A power transmission network (40) is disclosed which includes input means (52) for the input of telecommunication signals having carrier frequencies greater than 1 MHz onto the network (40), and a means for removing similar speech and/or data signals from the network. Preferably a network conditioning element (52) is used which includes a low pass filter portion for filtering out a low frequency high amplitude mains power signal, and a coupling lent for input and/or removal of telecommunication signals from the network. In this way both speech and data signals can be transmitted at carrier frequencies of greater than 1 MHz along a standard electricity distribution and/or transmission network which when conditioned provides a larger available spectrum par unit length of network and greater transmission capacity than previously known. The quiescent noise level of the conditioned network is also much reduced thus permitting lower signal injection levels for a given signal-to-noise ratio and a consequential reduction in spurious radiation from the network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.