Transmission network and filter therefor

Details Transmission network and filter therefor Transmission network and filter therefor

H - Electricity

04

B

H04B 3/54 (2006.01) H02J 13/00 (2006.01) H04B 3/56 (2006.01)

Patent

CA 2146648

A power transmission network (40) is disclosed which includes input means (52) for the input of telecommunication signals having carrier frequen- cies greater than 1MHz 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 element for input and/or removal of telecommu- nication signals from the ne- twork. In this way both speech and data signals can be trans- mitted at carrier frequencies of greater than 1MHz along a standard electricity distribution and/or transmission network which when conditioned pro- vides a larger available spectrum per unit length of network and greater transmission capacity than previously known. The quies- cent 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.

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