Communications: electrical – Systems – Selsyn type
Reexamination Certificate
2007-12-11
2007-12-11
Nguyen, Phung T. (Department: 2612)
Communications: electrical
Systems
Selsyn type
C340S315000, C333S101000
Reexamination Certificate
active
11117498
ABSTRACT:
The coupler of the present invention couples data signals, such as broadband RF signals, to and from a power line. The coupler of one embodiment that is for use with overhead power lines includes a length of URD MV cable with the neutral conductor removed. Each end of the URD cable is communicatively coupled to the MV power line conductor a predetermined distance from other. The distance between the two connections points on the MV may be related to the wavelength of a carrier frequency used to communicate the data signals. The URD cable may also form part of a transformer to permit the passage of data signals while preventing the flow of the high voltage power signals through the coupler. The neutral semi-conductive jacket of the URD cable may be coupled to ground via a low frequency conductive path.
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“Centralized Commercial Building Applications with the Lonworks® PLT-21 Power Line Transceiver”,Lonworks Engineering Bulletin, Echelon, (Apr. 1997), 1-22.
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“EMETCON Automated Distribution System”
Radtke William O.
Yaney David Stanley
Barnes Mel
Capital Legal Group, LLC
Current Technologies, LLC
Nguyen Phung T.
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