Improved Coupling of Communications Signals to a Power Line

• US 20070014529A1
• Filed: 06/20/2006
• Published: 01/18/2007
• Est. Priority Date: 07/15/2005
• Status: Active Grant

• Current Assignee: International Broadband Electric Communications Incorporated
• Original Assignee: International Broadband Electric Communications Incorporated
• Inventors: Zitting, Brent
• Granted Patent: US 7,522,812 B2
• Time in Patent Office: Days
• US Class Current: 385/147
• CPC Class Codes: H04B 2203/5483 using coupling circuits
• CPC Class Codes: H04B 3/542 the information being in digital form
• CPC Class Codes: H04B 3/56 Circuits for coupling, blocking, or by-passing of signals

Abstract

In one embodiment, a device for coupling communications signals onto a medium-voltage power line includes a first connector, a second connector and one or more components. The first connector is adapted to couple to a low-voltage communications line. The second connector is adapted to couple to a surge arrester. The one or more components are operable to substantially match the impedances between the surge arrester and the low-voltage communications line.

Claims

1. A system for communicating signals over a medium-voltage power line, the system comprising:

a communications device comprising at least one modem; and

a coupler comprising;

a coaxial connector coupled to the communications device;

an impedance transformer electrically coupled to the coaxial connector, the impedance transformer having a step-up ratio of approximately 8;

1;

a capacitor electrically coupled to the impedance transformer, the capacitor having a capacitance of approximately 0.05 microfarads;

a conductive metallic disk electrically coupled to the capacitor, the conductive metallic disk defining a substantially circular opening adapted to accept a ground post from a lightning arrester; and

a circuit board, wherein the connector, the capacitor, the impedance transformer, and the conductive disk are coupled to the circuit board.

2. A system for communicating signals on a medium-voltage power line, the system comprising:

a communications device; and

a coupler comprising;

a first connector adapted to couple to the communications device;

an impedance transformer;

a capacitor; and

a second connector defining an opening adapted to accept a ground post from a surge arrester.

3. The system of claim 2, wherein the first connector is adapted to couple to a coaxial cable having an impedance of approximately 50-75 ohms.

4. The system of claim 2, wherein the impedance transformer provides a step-up ratio in the range from 5:

1 to 9;

1.

5. The system of claim 2, wherein the capacitor provides a capacitance in the range from 0.01 to 0.1 microfarads.

6. The system of claim 2, wherein the second connector comprises a metallic disk.

7. The system of claim 2, wherein the opening has a diameter in the range from 0.25 to 0.75 inches.

8. The system of claim 2, wherein:

the coupler further comprises a circuit board; and

the first connector, the capacitor, the impedance transformer, and the second connector are coupled to the circuit board.

9. A device for coupling communications signals to a medium-voltage power line, the device comprising:

a first connector adapted to couple to a low-voltage communications line;

an impedance transformer;

a capacitor; and

a second connector adapted to couple to a surge arrester.

10. The device of claim 9, wherein the low-voltage communications line comprises a coaxial cable having an impedance of approximately 50-75 ohms.

11. The device of claim 9, wherein the impedance transformer provides a step-up ratio in the range from 5:

1 to 9;

1.

12. The device of claim 9, wherein the capacitor provides a capacitance in the range from 0.01 to 0.1 microfarads.

13. The system of claim 9, wherein the second connector comprises a metallic disk which defines a substantially circular opening with a diameter in the range from 0.25 to 0.75 inches.

14. The device of claim 9, further comprising a circuit board;

wherein the first connector, the capacitor, the impedance transformer, and the second connector are coupled to the circuit board.

15. A device for coupling communications signals to a medium-voltage power line, the device comprising:

a base;

one or more electrical components;

a first connector adapted to couple to a low-voltage communications line; and

a second connector adapted to conductively couple to a surge arrester, the second connector defining a substantially circular opening adapted to accept a ground post from the surge arrester;

wherein the one or more electrical components, the first connector, and the second connector are physically coupled to the base.

16. The device of claim 15, wherein the base comprises a circuit board.

17. The device of claim 16, further comprising a protective coating covering at least a portion of the circuit board, the protective coating adapted to seal the at least a portion of the circuit board against moisture.

18. The device of claim 15, wherein the one or more electrical components are operable to provide impedance matching.

19. The device of claim 15, wherein the second connector comprises a metallic disk.

20. The device of claim 15, wherein the substantially circular opening has a diameter in the range from 0.2 inches to 0.8 inches.

21. The device of claim 15, wherein the substantially circular opening has a diameter of 0.4 inches.

22. A device for coupling communications signals to a medium-voltage power line, the device comprising:

a first connector adapted to couple to a low-voltage communications line;

a second connector adapted to couple to a surge arrester; and

one or more components operable to substantially match the impedances between the surge arrester and the low-voltage communications line.

23. The device of claim 22, wherein the one or more components comprise an impedance transformer having a step-up ratio in the range from 5:

1 to 9;

1 in series with a capacitor having a capacitance in the range from 0.01 to 0.1 micro farads.

24. The device of claim 22, wherein the low-voltage communications line comprises a coaxial cable.

25. A method for coupling communications signals to a medium-voltage power line, the method comprising:

transmitting a communications signal;

from a signal regenerator;

through a low-voltage communications line;

through one or more components operable to increase impedance by a ratio of between 5;

1 and 9;

1;

through a surge arrester; and

to a medium-voltage power line.

26. A device for coupling communications signals to a medium-voltage power line, the device comprising:

a means for coupling to a low-voltage communications line;

a means for coupling to a surge arrester; and

a means for substantially matching the impedances between the surge arrester and the low-voltage communications line.