Signal amplifiers that support MoCA communications at both active and passive output ports

• US 10,277,954 B2
• Filed: 05/30/2017
• Issued: 04/30/2019
• Est. Priority Date: 01/21/2014
• Status: Active Grant

• Current Assignee: Digicomm International LLC
• Original Assignee: Commscope Inc of North Carolina (CommScope Holding Company, Inc.)
• Inventors: Li, Shi Man
• Primary Examiner(s): Ton, Dang T
• Application Number:
  US15/607,896
• Publication Number:
  US 20170264963A1
• Time in Patent Office: 700 Days
• Field of Search: 370297
• CPC Class Codes: H04N 21/6118 involving cable transmission, e.g. using a cable modem
• CPC Class Codes: H04N 21/6168 involving cable transmission, e.g. using a cable modem
• CPC Class Codes: H04N 7/17309 Transmission or handling of upstream communications

Abstract

RF signal amplifiers are provided that include an RF input port, a power divider network having a plurality of active output ports, an active path connecting the RF input port to the power divider network, the active path including an upstream diplexer, a downstream diplexer and a power amplifier between the upstream diplexer and the downstream diplexer, a passive output port, a MoCA diplexer that is coupled to the passive output port, a passive path connecting the RF input port to the MoCA diplexer and a MoCA rejection filter between the power divider network and the active path.

Claims

1. A radio frequency (“

RF”

) signal amplifier, comprising;

an RF input port;

a power divider network having a plurality of active RF output ports;

an active communications path connecting said RF input port to said plurality of active RF output ports, said active communications path including an upstream diplexer, a downstream diplexer and a power amplifier between said upstream diplexer and said downstream diplexer;

a first filter functioning as a MoCA rejection filter and coupled between said power divider network and said RF input port;

a passive RF output port;

a passive communications path connecting said RF input port to said passive RF output port; and

a MoCA pass filter coupled between a first node and a second node, wherein said first node is located upstream of said passive RF output port along said passive communications path and the second node is located downstream of the first filter along the active communications path, the MoCA pass filter configured to pass signals in a MoCA frequency band and to not pass signals in the upstream and downstream frequency bands of a service provider.

2. The RF signal amplifier of claim 1, wherein said second node is located upstream of said power divider network.

3. The RF signal amplifier of claim 2, wherein said second node is located between said downstream diplexer and said power divider network.

4. The RF signal amplifier of claim 1, further comprising:

a second filter coupled along said passive communications path between said RF input port and said first node, said second filter configured to pass signals in upstream and downstream frequency bands of the service provider.

5. The RF signal amplifier of claim 1, wherein said power amplifier is a first power amplifier which amplifies downstream signals passing from said upstream diplexer to said downstream diplexer.

6. The RF signal amplifier of claim 5, further comprising:

a second power amplifier between said upstream diplexer and said downstream diplexer, wherein said second power amplifier amplifies upstream signals passing from said downstream diplexer to said upstream diplexer.

7. The RF signal amplifier of claim 1, wherein said first filter reflects upstream MoCA signals back downstream toward said power divider network.

8. The RF signal amplifier of claim 4, wherein said first filter and said second filter both block signals in at least the 1150 MHz to 1675 MHz frequency band.

9. The RF signal amplifier of claim 4, wherein said first filter is configured to reflect a majority of the signal energy in the 1150 MHz to 1675 MHz frequency band.

10. The RF signal amplifier of claim 1, wherein said power divider network includes at least a first directional coupler that has an input port, first and second output ports and a MoCA bypass circuit coupled between said first and second output ports that is configured to pass signals in the 1150 MHz to 1675 MHz frequency band, and an isolation circuit that is provided between said first and second output ports of said first directional coupler that is configured to block signals in the 5 MHz to 1002 MHz frequency band.

11. A radio frequency (“

RF”

) signal amplifier, comprising;

an RF input port;

a power divider network having a plurality of active RF output ports;

an active communications path connecting said RF input port to said power divider network, said active communications path including at least one power amplifier to amplify an upstream signal or a downstream signal passing along said active communications path;

a first filter functioning as a MoCA rejection filter and coupled between said power divider network and said RF input port;

a passive RF output port;

a passive communications path connecting said RF input port to said passive RF output port; and

a MoCA pass filter coupled between a first node and a second node, wherein said first node is located upstream of said passive RF output port along said passive communications path and said second node is located downstream of said first filter along said active communications path, said MoCA pass filter configured to pass signals in a MoCA frequency band and to not pass signals in said upstream and downstream frequency bands of a service provider.

12. The RF signal amplifier of claim 11, wherein said second node is located upstream of said power divider network.

13. The RF signal amplifier of claim 11, wherein said at least one power amplifier is a first power amplifier which amplifies downstream signals, and further comprising:

a second power amplifier which amplifies upstream signals.

14. The RF signal amplifier of claim 11, wherein said first filter is configured to reflect a majority of the signal energy in the 1150 MHz to 1675 MHz frequency band.

15. The RF signal amplifier of claim 11, wherein said power divider network includes at least a first directional coupler that has an input port, first and second output ports and a MoCA bypass circuit coupled between said first and second output ports that is configured to pass signals in the 1150 MHz to 1675 MHz frequency band, and an isolation circuit that is provided between said first and second output ports of said first directional coupler that is configured to block signals in the 5 MHz to 1002 MHz frequency band.

16. An RF signal amplifier, comprising:

an RF input port;

a power divider network having a plurality of active RF output ports;

an active communications path connecting said RF input port to said power divider network, said active communications path including an upstream diplexer, a downstream diplexer and a power amplifier between said upstream diplexer and said downstream diplexer;

a passive RF output port;

a passive communications path connecting said RF input port to said passive RF output port;

a first filter functioning as a MoCA rejection filter and coupled between said power divider network and said RF input port;

a second filter coupled along the passive communications path between said RF input port and a first node that is connected to the passive RF output port, said second filter configured to pass signals in upstream and downstream frequency bands of a service provider;

an electrical connection between said first node and a second node that is between said first filter and at least one of said plurality of active RF output ports, the electrical connection providing a communications path allowing MoCA signals to be transmitted from said plurality of active RF output ports to said passive RF output port;

a third filter coupled along said electrical connection between said first node and said second node, said third filter configured to pass signals in a MoCA frequency band and to not pass signals in the upstream and downstream frequency bands of the service provider; and

a power input for receiving electrical power to power said power amplifier between said upstream diplexer and said downstream diplexer.

17. The RF signal amplifier of claim 16, wherein said active communications path includes a selective termination circuit, said selective termination circuit being configured to pass signals between said RF input port and said active communication path, downstream of said selective termination circuit, when electrical power is received at said power input, and said selective termination circuit being configured to terminate said active communications path to a matched termination when an electrical power feed to said power input is interrupted.

18. The RF signal amplifier of claim 17, wherein said selective termination circuit is located between said RF input port and said upstream diplexer.

19. The RF signal amplifier of claim 18, wherein said selective termination circuit includes a relay having an input terminal, a first output terminal and a second output terminal, wherein said first output terminal of said relay is coupled to said upstream diplexer and said second output terminal of said relay is connected to a resistor that is terminated to a ground voltage, and further comprising:

a directional coupler having an input that is connected to said RF input port, a first output that is connected to said input terminal of said relay and a second output that is connected to said passive communications path.

20. The RF signal amplifier of claim 18, wherein said selective termination circuit includes a switching device having an input terminal that is coupled to said RF input port, a first output terminal that is coupled to said upstream diplexer, and a second output terminal that is connected to an input of an attenuator, wherein an output of said attenuator is coupled to said upstream diplexer.