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

• US 9,699,516 B2
• Filed: 12/05/2014
• Issued: 07/04/2017
• Est. Priority Date: 01/21/2014
• Status: Active Grant

• Current Assignee: Digicomm International LLC
• Original Assignee: CommScope Inc. (CommScope Holding Company, Inc.)
• Inventors: Li, Shi Man
• Primary Examiner(s): Ton, Dang
• Application Number:
  US14/561,319
• Publication Number:
  US 20150207525A1
• Time in Patent Office: 942 Days
• Field of Search: 370297, 370401, 370389
• 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 the RF input port to the power divider network, the active communications path including an upstream diplexer, a downstream diplexer and a power amplifier between the upstream diplexer and the downstream diplexer;

a passive RF output port;

a passive path diplexer that is coupled to the passive RF output port, wherein the passive path diplexer routes signals in a service provider network frequency band differently than signals in a second network frequency band, the service provider network frequency band being different than the second network frequency band;

a passive communications path connecting the RF input port to the passive path diplexer; and

a MoCA rejection filter between the power divider network and the active communications path.

2. The RF signal amplifier of claim 1, wherein the passive path diplexer comprises a MoCA diplexer, the RF signal amplifier further comprising an electrical connection between a high frequency port of the MoCA diplexer and a node between the MoCA rejection filter and the power divider network.

3. The RF signal amplifier of claim 2, wherein the electrical connection provides a communications path allowing MoCA signals to be transmitted from the plurality of active RF output ports to the passive RF output port.

4. The RF signal amplifier of claim 2, wherein a common port of the MoCA diplexer is coupled to the passive RF output port, and wherein a low frequency port of the MoCA diplexer is coupled to the passive communications path.

5. The RF signal amplifier of claim 4, wherein the MoCA rejection filter comprises a first integrated circuit MoCA rejection filter, and wherein the MoCA diplexer comprises a second integrated circuit MoCA rejection filter combined with a third integrated circuit filter that blocks signals in the 5 MHz to 1002 MHz frequency band.

6. The RF signal amplifier of claim 4, wherein the MoCA rejection filter blocks signals in at least the 1150 MHz to 1675 MHz frequency band.

7. The RF signal amplifier of claim 1, wherein the RF signal amplifier further comprises a power input for receiving electrical power, and wherein the active communications path further comprises a selective termination circuit that is configured to pass signals between the RF input port and the upstream diplexer when electrical power is received at the power input, and that is further configured to terminate the active communications path to a matched termination when an electrical power feed to the power input is interrupted.

8. The RF signal amplifier of claim 7, wherein the selective termination circuit comprises a relay having an input terminal, a first output terminal and a second output terminal, wherein the first output terminal of the relay is coupled to the upstream diplexer and the second output terminal of the relay is connected to a resistor that is terminated to a ground voltage, the RF signal amplifier further comprising a directional coupler having an input that is connected to the RF input port, a first output that is connected to the input terminal of the relay and a second output that is connected to the passive communications path.

9. The RF signal amplifier of claim 7, wherein the selective termination circuit comprises a switching device having an input terminal that is coupled to the RF input port, a first output terminal that is coupled to the upstream diplexer, and a second output terminal that is connected to an input of an attenuator, wherein an output of the attenuator is coupled to the upstream diplexer.

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

11. The RF signal amplifier of claim 1, wherein the MoCA rejection filter is configured to reflect a majority of the signal energy in the 1150 MHz to 1675 MHz frequency band.

12. The RF signal amplifier of claim 1, further comprising a printed circuit board, wherein the MoCA rejection filter comprises an integrated circuit chip that is pre-tuned to reject signals in the 1150 MHz to 1675 MHz frequency band, and wherein the integrated circuit chip is surface mounted on the printed circuit board.

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

a first filter functioning as a MoCA rejection filter and coupled between the power divider network and the active communications path;

a passive RF output port;

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

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

a third filter coupled between the first node and a second node that is between the first filter and the power divider network, the 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.

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

a passive RF output port;

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

a first filter functioning as a MoCA rejection filter and coupled between the power divider network and the active communications path;

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

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

a third filter coupled along the electrical connection between the first node and the second node, the 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,

wherein the active communications path further comprises a selective termination circuit between the RF input port and the upstream diplexer, the selective termination circuit being configured to pass signals between the RF input port and the upstream diplexer when electrical power is received at the power input, and that is configured to terminate the active communications path to a matched termination when an electrical power feed to the power input is interrupted.

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

16. The RF signal amplifier of claim 15, wherein the third filter comprises a high pass filter.

17. The RF signal amplifier of claim 14, wherein the selective termination circuit comprises a relay having an input terminal, a first output terminal and a second output terminal, wherein the first output terminal of the relay is coupled to the upstream diplexer and the second output terminal of the relay is connected to a resistor that is terminated to a ground voltage, the RF signal amplifier further comprising a directional coupler having an input that is connected to the RF input port, a first output that is connected to the input terminal of the relay and a second output that is connected to the passive communications path.

18. The RF signal amplifier of claim 14, wherein the selective termination circuit comprises a switching device having an input terminal that is coupled to the RF input port, a first output terminal that is coupled to the upstream diplexer, and a second output terminal that is connected to an input of an attenuator, wherein an output of the attenuator is coupled to the upstream diplexer.

19. The RF signal amplifier of claim 14, wherein the power divider network comprises at least a first directional coupler that has an input port, first and second output ports and a MoCA bypass circuit coupled between the first and second output ports that is configured to pass signals in the 1150MHz to 1675 MHz frequency band, and an isolation circuit that is provided between the first and second output ports of the directional coupler that is configured to block signals in the 5 MHz to 1002 MHz frequency band.

20. The RF signal amplifier of claim 14, further comprising a printed circuit board, wherein the first MoCA rejection filter comprises an integrated circuit chip that is pre-tuned to reject signals in the MoCA frequency band, and wherein the integrated circuit chip is surface mounted on the printed circuit board.

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

a passive RF output port;

a passive path diplexer that is coupled to the passive RF output port, wherein the passive path diplexer routes signals in a service provider network frequency band differently than signals in a second network frequency band, the service provider network frequency band being different than the second network frequency band;

a passive communications path connecting the RF input port to the passive path diplexer; and

an active path diplexer that is coupled to the downstream diplexer, wherein the active path diplexer routes signals in the service provider network frequency band differently than signals in the second network frequency band.