Filter circuit

Patent metadata

Field	Value
Publication number	US-10790793-B2
Application number	US-201916359335-A
Country	US
Kind code	B2
Filing date	Mar 20, 2019
Priority date	Feb 1, 2010
Publication date	Sep 29, 2020
Grant date	Sep 29, 2020

Abstract

A filter circuit includes a pass band filter and a multipath interference mitigation leg. The pass band filter is disposed along a signal path between a provider-side port and a user-side port. The pass band filter is configured to pass a provider bandwidth signal received at the provider-side port and block at least a portion of a home network bandwidth signal received at the user-side port. A frequency spectrum of the home network bandwidth signal is distinct from, and higher than, a frequency spectrum of the provider bandwidth signal. The multipath interference mitigation leg is operatively branched to ground from the signal path. The multipath interference mitigation leg is configured to increase a return loss in the home network bandwidth signal.

First claim

What is claimed is:

1. A filter circuit, comprising:
a pass band filter disposed along a signal path between a provider-side port and a user-side port, wherein the pass band filter is configured to pass a provider bandwidth signal received at the provider-side port and block at least a portion of a home network bandwidth signal received at the user-side port, and wherein a frequency spectrum of the home network bandwidth signal is distinct from, and higher than, a frequency spectrum of the provider bandwidth signal; and
a multipath interference mitigation leg operatively branched to ground from the signal path, wherein the multipath interference mitigation leg is configured to increase a return loss in the home network bandwidth signal.

2. The filter circuit of claim 1 , wherein the multipath interference mitigation leg comprises an absorptive filter.

3. The filter circuit of claim 2 , wherein the absorptive filter increases the return loss at the user-side port without affecting a frequency response of any other component of the filter circuit.

4. The filter circuit of claim 2 , wherein the absorptive filter comprises a termination resistor that is configured to substantially match an impedance of a line load of the signal path to prevent reflections due to an impedance mismatch.

5. The filter circuit of claim 1 , wherein the multipath interference mitigation leg comprises an attenuator filter.

6. The filter circuit of claim 5 , wherein the attenuator filter increases the return loss at the user-side port without affecting a frequency response of any other component of the filter circuit.

7. The filter circuit of claim 5 , wherein the attenuator filter comprises:
a high-pass filter portion comprising a Tee-type circuit; and
an attenuator portion comprising a Tee-type resistive attenuator comprising a plurality of resistors.

8. A filter circuit, comprising:
a pass band filter configured to block at least a portion of a home network bandwidth signal received at a user-side port; and
a multipath interference mitigation leg configured to be operatively branched to ground and increase a return loss in the home network bandwidth signal,
wherein a frequency spectrum of the home network bandwidth signal is distinct from, and higher than, a frequency spectrum of a provider bandwidth signal received at a provider-side port.

9. The filter circuit of claim 8 , wherein the pass band filter is positioned in a signal path, and wherein the signal path extends between the provider-side port and the user-side port.

10. The filter circuit of claim 9 , wherein the multipath interference mitigation leg is operatively branched to ground from the signal path.

11. The filter circuit of claim 9 , wherein the multipath interference mitigation leg comprises an absorptive filter.

12. The filter circuit of claim 11 , wherein the absorptive filter increases the return loss at the user-side port without affecting a frequency response of any other component of the filter circuit.

13. The filter circuit of claim 11 , wherein the absorptive filter comprises a termination resistor that is configured to substantially match an impedance of a line load of the signal path to prevent reflections due to an impedance mismatch.

14. The filter circuit of claim 8 , wherein the multipath interference mitigation leg comprises an attenuator filter.

15. The filter circuit of claim 14 , wherein the attenuator filter increases the return loss at the user-side port without affecting a frequency response of any other component of the filter circuit.

16. The filter circuit of claim 14 , wherein the attenuator filter comprises a high-pass filter portion and an attenuator portion.

17. A pass band filter for mitigating multipath interference, the pass band filter comprising:
a pass portion configured to pass a provider signal received at a provider-side port to a user-side port, the provider signal having a provider bandwidth;
an attenuating portion configured to attenuate a home network signal received at the user-side port, the home network signal having a home network bandwidth; and
an interference mitigation portion configured to increase a return loss in the home network bandwidth so as to mitigate multipath interference,
wherein the home network bandwidth has a home network frequency spectrum that is distinct from, and higher than, a provider frequency spectrum of the provider bandwidth.

18. The pass band filter of claim 17 , wherein the pass portion is configured to be disposed along a signal path between the provider-side port and the user-side port.

19. The pass band filter of claim 17 , wherein the interference mitigation portion is configured to be operatively branched to ground from a signal path between the provider side port and the user side port.

20. The pass band filter of claim 17 , wherein the interference mitigation portion comprises a multipath interference mitigation leg that is configured to be operatively branch to ground from a signal path between the provider-side port and the user-side port.

21. A device for mitigating multipath interference, the device comprising:
a pass portion configured to pass a provider signal received at a provider-side port to a user-side port, the provider signal having a provider bandwidth;
an attenuating portion configured to attenuate a home network signal received at the user-side port, the home network signal having a home network bandwidth; and
an interference mitigation portion configured to increase a return loss in the home network bandwidth so as to mitigate multipath interference,
wherein the home network bandwidth has a home network frequency spectrum that is distinct from, and higher than, a provider frequency spectrum of the provider bandwidth.

22. The device of claim 21 , wherein the pass portion is configured to be disposed along a signal path between the provider-side port and the user-side port.

23. The device of claim 21 , wherein the interference mitigation portion is configured to be operatively branched to ground from a signal path between the provider side port and the user side port.

24. The device of claim 21 , wherein the interference mitigation portion comprises a multipath interference mitigation leg that is configured to be operatively branch to ground from a signal path between the provider-side port and the user-side port.

25. A pass band filter, comprising:
means for passing a provider signal having a provider bandwidth received at a provider-side port to a user-side port, the provider signal having a provider bandwidth;
means for attenuating a home network signal received at the user-side port, the home network signal having a home network bandwidth; and
means for increasing a return loss in the home network bandwidth so as to mitigate multipath interference,
wherein the home network bandwidth has a home network frequency spectrum that is distinct from, and higher than, a provider frequency spectrum of the provider bandwidth.

26. The pass band filter of claim 25 , wherein the means for passing is configured to be disposed along a signal path between the provider-side port and the user-side port.

27. The pass band filter of claim 25 , wherein the means for increasing is configured to be operatively branched to ground from a signal path between the provider-side port and the user-side port.

28. The pass band filt

Assignees

• Ppc Broadband Inc

Inventors

• Alkan Erdogan
• Palinkas Raymond W

Classifications

• H03H7/1766

  Parallel LC in series path (H03H7/1783 takes precedence) · CPC title

• H03H7/1758 Primary

  Series LC in shunt or branch path (H03H7/1791 takes precedence) · CPC title

• H03H7/01

  Frequency selective two-port networks · CPC title

• H03H7/1741

  Comprising typical LC combinations, irrespective of presence and location of additional resistors (when resistors are present, also classify in H03H7/06 - H03H7/07) · CPC title

• H03H7/06

  including resistors (H03H7/075, H03H7/09, H03H7/12, H03H7/13 take precedence) · CPC title