Radio frequency power divider networks having MoCA bypass circuits and related methods

• US 9,743,038 B2
• Filed: 03/30/2015
• Issued: 08/22/2017
• Est. Priority Date: 04/02/2014
• 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): Goodarzi, Nasser
• Assistant Examiner(s): Imperial, Jaycee
• Application Number:
  US14/672,260
• Publication Number:
  US 20150288920A1
• Time in Patent Office: 876 Days
• Field of Search: 725149
• CPC Class Codes: H03H 7/46 Networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source for use in multiplex transmission systems H04J1/00
• CPC Class Codes: H04N 21/6118 involving cable transmission, e.g. using a cable modem
• CPC Class Codes: H04N 7/104 Switchers or splitters

Abstract

Power divider networks are provided that have Multimedia Over Coax Alliance (“MoCA”) bypass paths. These power divider networks may include a housing having an input port and first and second output ports; a first impedance transformer that has a first winding coupled in series between the input port and a first node, a second winding coupled in series between a reference voltage and the first node; a second impedance transformer that has a third winding coupled in series between the first node and the first output port, a fourth winding coupled in series between the first node and the second output port; a resistance having a first end coupled to the first output port and a second end coupled to the second output port; a first inductor in series between the third winding and the first output port; a second inductor in series between the fourth winding and the second output port; and a third inductor and a first capacitor that are disposed in parallel between the first output port and the first end of the first resistance.

Claims

1. A directional coupler having a Multimedia Over Coax Alliance (“

MoCA”

) bypass path, comprising;

a housing having an input port, a first output port and a second output port;

a first impedance transformer that has a first winding coupled in series between the input port and a first node and a second winding that is positioned to couple with the first winding, the second winding coupled in series between a reference voltage and the first node;

a second impedance transformer that has a third winding coupled in series between the first node and a second node and a fourth winding that is positioned to couple with the third winding, the fourth winding coupled in series between the first node and a third node;

a resistance having a first end coupled to the third node and a second end coupled to a fourth node;

a first inductor in series between the third winding and the second node;

a second inductor in series between the fourth winding and the third node;

a third inductor and a first capacitor that are disposed in parallel between the second node and the fourth node,

wherein the first output port is coupled to the second node opposite the first inductor and the second output port is coupled to the third node opposite the second inductor; and

wherein the resistance has a value that is approximately twice the value of a desired impedance of the first output port.

2. The directional coupler of claim 1, wherein at least one of the first inductor or the second inductor is implemented as traces on a printed circuit board that include one or more self-coupling sections.

3. The directional coupler of claim 1, wherein the third inductor has an inductance between about 3 nH and about 12 nH and the first capacitor has a capacitance between about 0.5 pF and about 3.0 pF.

4. The directional coupler of claim 1, wherein the first and second inductors each have an inductance between about 3 nH and about 8 nH.

5. A radio frequency (“

RF”

) power divider network, comprising;

a first directional coupler having a first RF input port, a first signal splitting circuit, first and second RF output ports, a first inductor coupled in series between a first output of the first signal splitting circuit and the first RF output port and a second inductor coupled in series between a second output of the first signal splitting circuit and the second RF output Port;

a second directional coupler having a second RF input port that is coupled to the first RF output port, a second signal splitting circuit, third and fourth RF output ports, a third inductor coupled in series between a first output of the second signal splitting circuit and the third RF output port and a fourth inductor coupled in series between a second output of the second signal splitting circuit and the fourth RF output port; and

a third directional coupler having a third RF input port that is coupled to the second RF output port, a third signal splitting circuit, fifth and sixth RF output ports, a fifth inductor coupled in series between a first output of the third signal splitting circuit and the fifth RF output port and a sixth inductor coupled in series between a second output of the third signal splitting circuit and the sixth RF output port;

wherein the first directional coupler is different from the second directional coupler and the third directional coupler in that at least one component of the first directional coupler is different as being present, absent or of a different value compared to the components of the second directional coupler and the third directional coupler, and

wherein the first directional coupler further includes a first resistor that has a first end and a second end that is coupled to the second RF output port, and a first capacitor and a seventh inductor that are coupled in parallel between the first RF output port and the first end of the first resistor.

6. The RF power divider network of claim 5, wherein the first, second and seventh inductors, the first resistor and the first capacitor comprise a first MoCA bypass circuit that is configured to pass signals in a MoCA frequency band between the first RF output port and the second RF output port, and wherein the second directional coupler includes a second MoCA bypass circuit that consists essentially of the third inductor, the fourth inductor and a second resistor that is coupled between the third RF output port and the fourth RF output port.

7. The RF power divider network of claim 6, wherein the third directional coupler includes a third MoCA bypass circuit that consists essentially of the fifth inductor, the sixth inductor and a third resistor that is coupled between the fifth RF output port and the sixth RF output port, wherein the third MoCA bypass circuit is substantially identical to the second MoCA bypass circuit.

8. The RF power divider network of claim 5, further comprising:

a fourth directional coupler having a fourth RF input port, a fourth signal splitting circuit, seventh and eighth RF output ports, an eighth inductor coupled in series between a first output of the fourth signal splitting circuit and the seventh RF output port and a ninth inductor coupled in series between a second output of the fourth signal splitting circuit and the eighth RF output port;

a fifth directional coupler having a fifth RF input port that is coupled to the seventh RF output port, a fifth signal splitting circuit, ninth and tenth RF output ports, a tenth inductor coupled in series between a first output of the fifth signal splitting circuit and the ninth RF output port and an eleventh inductor coupled in series between a second output of the fifth signal splitting circuit and the tenth RF output port;

a sixth directional coupler having a sixth RF input port that is coupled to the tenth RF output port, a sixth signal splitting circuit, eleventh and twelfth RF output ports, a twelfth inductor coupled in series between a first output of the sixth signal splitting circuit and the eleventh RF output port and a thirteenth inductor coupled in series between a second output of the sixth signal splitting circuit and the twelfth RF output port; and

a seventh directional coupler having a seventh RF input port, a seventh signal splitting circuit, thirteenth and fourteenth RF output ports, a fourteenth inductor coupled in series between a first output of the seventh signal splitting circuit and the thirteenth RF output port and a fifteenth inductor coupled in series between a second output of the seventh signal splitting circuit and the fourteenth RF output port;

wherein the second directional coupler further includes a second resistor that has a first end and a second end that is coupled to the fourth RF output port, and a second capacitor and a sixteenth inductor that are coupled in parallel between the third RF output port and the first end of the second resistor,

wherein the third directional coupler further includes a third resistor that has a first end and a second end that is coupled to the sixth RF output port, and a third capacitor and a seventeenth inductor that are coupled in parallel between the fifth RF output port and the first end of the third resistor,

wherein the fourth directional coupler includes a first MoCA bypass circuit that consists essentially of the eighth inductor, the ninth inductor and a fourth resistor that is coupled between the seventh RF output port and the eighth RF output port,

wherein the fifth directional coupler includes a second MoCA bypass circuit that consists essentially of the tenth inductor, the eleventh inductor and a fifth resistor that is coupled between the ninth RF output port and the tenth RF output port,

wherein the sixth directional coupler includes a third MoCA bypass circuit that consists essentially of the twelfth inductor, the thirteenth inductor and a sixth resistor that is coupled between the eleventh RF output port and the twelfth RF output port, and

wherein the seventh directional coupler includes a fourth MoCA bypass circuit that consists essentially of the fourteenth inductor, the fifteenth inductor and a seventh resistor that is coupled between the thirteenth RF output port and the fourteenth RF output port.

9. The RF power divider network of claim 5, wherein the first resistor has a value of approximately 150 ohms.

10. The RF power divider network of claim 5, wherein the first through sixth inductors are each implemented as traces on a printed circuit board that include one or more self-coupling sections.

11. The directional coupler of claim 8, wherein the fifth through eighth inductors each have an inductance between about 3 nH and about 8 nH.

12. The directional coupler of claim 8, wherein the sixteenth and seventeenth inductors each has an inductance between about 3 nH and about 12 nH and the second and third capacitors each has a capacitance between about 0.5 pF and about 3.0 pF.

13. A radio frequency (“

RF”

) power divider network, comprising;

a first directional coupler having a first RF input port, a first signal splitting circuit, first and second RF output ports and a first MoCA bypass circuit that is configured to pass signals in a MoCA frequency band between the first RF output port and the second RF output port;

a second directional coupler having a second RF input port that is coupled to the first RF output port, a second signal splitting circuit, third and fourth RF output ports and a second MoCA bypass circuit that is configured to pass signals in the MoCA frequency band between the third RF output port and the fourth RF output port

a third directional coupler having a third RF input port that is coupled to the second RF output port, a third signal splitting circuit, fifth and sixth RF output ports and a third MoCA bypass circuit that is configured to pass signals in the MoCA frequency band between the fifth RF output port and the sixth RF output port,

wherein the first MoCA bypass circuit is different from the second MoCA bypass circuit and the third MoCA bypass circuit, and

wherein the first MoCA bypass circuit includes at least one inductor and at least one capacitor that are not included in the second MoCA bypass circuit or the third MoCA bypass circuit.

15. The RF power divider network of claim 13, wherein the circuit elements in the second MoCA bypass circuit and the third MoCA bypass circuit combine with the circuit elements in the first MoCA bypass circuit to form a multi-pole filter that exhibits a reduced maximum signal loss in the MoCA frequency band for signals passing from the first output port to the second output port as compared to an identical RF power divider network with the second and third MoCA bypass circuits omitted therefrom.

14. A radio frequency (“

RF”

) power divider network, comprising;

a first directional coupler having a first RF input port, a first signal splitting circuit, first and second RF output ports and a first MoCA bypass circuit that is configured to pass signals in a MoCA frequency band between the first RF output port and the second RF output port;

a second directional coupler having a second RF input port that is coupled to the first RF output port, a second signal splitting circuit, third and fourth RF output ports and a second MoCA bypass circuit that is configured to pass signals in the MoCA frequency band between the third RF output port and the fourth RF output port

a third directional coupler having a third RF input port that is coupled to the second RF output port, a third signal splitting circuit, fifth and sixth RF output ports and a third MoCA bypass circuit that is configured to pass signals in the MoCA frequency band between the fifth RF output port and the sixth RF output port,

wherein the first MoCA bypass circuit is different from the second MoCA bypass circuit and the third MoCA bypass circuit in that at least one component of the first MoCA bypass circuit is different as being present, absent or of a different value compared to the components of the second MoCA bypass circuit and the third MoCA bypass circuit, and

wherein at least some of the circuit elements in the second MoCA bypass circuit are configured to reduce the maximum signal loss in the first MoCA bypass circuit.