Multi-common port multiband filters
A technology for a dual-common port multi-bandpass filter is described. The dual-common port multi-bandpass filter can include two or more analog filters. The dual-common port multi-bandpass filter can include a first common port coupled to an input of each of the two or more analog filters, where each analog filter can be configured to filter one or more frequency bands. The dual-common port multi-bandpass filter can include a second common port coupled to an output of each of the two or more analog filters. Each input of each of the two or more analog filters can be impedance matched with the first common port. Each output of each of the two or more analog filters can be impedance matched with the second common port.
1. A dual-common port multi-bandpass filter, comprising:
two or more analog filters, wherein each analog filter of the two or more analog filters is configured for an uplink band or each analog filter of the two or more analog filters is configured for a downlink band;
a first common port coupled to an input of each of the two or more analog filters to enable a signal to be directed to the two or more analog filters, wherein each analog filter is configured to filter one or more frequency bands; and
a second common port coupled to an output of each of the two or more analog filters to output a filtered signal from the two or more analog filters;
wherein each input of each of the two or more analog filters is impedance matched with the first common port; and
wherein each output of each of the two or more analog filters is impedance matched with the second common port.
2. The dual-common port multi-bandpass filter of claim 1 , wherein the dual-common port multi-bandpass filter further comprises a matching network communicatively coupled to one or more of:
the input to each of the two or more analog filters in the dual-common port multi-bandpass filter; or
the output of each of the two or more analog filters in the dual-common port multi-bandpass filter,
wherein the matching network is operable to impedance match the two or more analog filters in the dual-common port multi-bandpass filter to operate together with the first common port or the second common port.
3. The dual-common port multi-bandpass filter of claim 1 , wherein each analog filter in the dual-common port multi-bandpass filter has one or more of an input that is impedance matched to the first common port while coupled to the inputs of other analog filters in the dual-common port multi-bandpass filter, or each analog filter in the dual-common port multi-bandpass filter has an output that is impedance matched to the second common port while coupled to the outputs of other analog filters in the dual-common port multi-bandpass filter.
4. The dual-common port multi-bandpass filter of claim 1 , wherein:
the first common port is coupled to the input of each of the two or more analog filters with a first signal trace that is coupled between the first common port, and divides to couple to the input to each of the two or more analog filters in the dual-common port multi-bandpass filter; and
the second common port is coupled to the output of each of the two or more analog filters with a second signal trace that is coupled between the second common port, and divides to couple to the output of each of the two or more analog filters in the dual-common port multi-bandpass filter.
5. The dual-common port multi-bandpass filter of claim 4 , wherein a length of each of the first signal trace and the second signal trace is less than 5 millimeters (mm).
6. The dual-common port multi-bandpass filter of claim 4 , wherein:
a length of the first signal trace from the first common port to the input to each of the two or more analog filters has a substantially equal length; and
a length of the second signal trace from the second common port to the output of each of the two or more analog filters has a substantially equal length.
7. The dual-common port multi-bandpass filter of claim 1 , wherein the dual-common port multi-bandpass filter is associated with one or more of a high band frequency or a low band frequency, wherein the high band frequency includes one or more of third generation partnership project (3GPP) long term evolution (LTE) band 4 (B4), band 2 (B2), or band 25 (B25), and the low band frequency includes one or more of 3GPP LTE band 5 (B5), band 12 (B12), or band 13 (B13).
8. The dual-common port multi-bandpass filter of claim 1 , wherein the dual-common port multi-bandpass filter is included on a signal path of a repeater, wherein the signal path is a high band frequency signal path or a low band frequency signal path, and the signal path is one of a downlink signal path or an uplink signal path.
9. The dual-common port multi-bandpass filter of claim 1 , wherein each analog filter of the two or more analog filters is configured for a separate uplink band or each analog filter of the two or more analog filters is configured for a separate downlink band.
10. A multi-common port multi-bandpass filter, comprising:
a first common port coupled to a first matching network, wherein the first matching network is coupled to:
a first set of two or more analog filters in the multi-common port multi-bandpass filter, wherein each analog filter of the first set of two or more analog filters is configured for an uplink band or each analog filter of the first set of two or more analog filters is configured for a downlink band; and
a second set of one or more analog filters in the multi-common port multi-bandpass filter, wherein each analog filter of the second set of two or more analog filters is configured for an uplink band or each analog filter of the second set of two or more analog filters is configured for a downlink band;
a second common port coupled to the first set of two or more analog filters in the multi-common port multi-bandpass filter; and
a third common port coupled to the second set of one or more analog filters in the multi-common port multi-bandpass filter,
wherein each analog filter in the multi-common port multi-bandpass filter is configured to filter one or more frequency bands.
11. The multi-common port multi-bandpass filter of claim 10 , wherein the multi-common port multi-bandpass filter further comprises a second matching network coupled to one or more of the first set of two or more analog filters in the multi-common port multi-bandpass filter or the second set of one or more analog filters in the multi-common port multi-bandpass filter.
12. The multi-common port multi-bandpass filter of claim 10 , wherein the multi-common port multi-bandpass filter further comprises:
a second matching network coupled to the first set of two or more analog filters in the multi-common port multi-bandpass filter; and
a third matching network coupled to the second set of one or more analog filters in the multi-common port multi-bandpass filter.
13. The multi-common port multi-bandpass filter of claim 10 , wherein each analog filter in the multi-common port multi-bandpass filter has an input that is impedance matched to one of the first common port, the second common port or the third common port while coupled to inputs of other analog filters in the multi-common port multi-bandpass filter, and each analog filter in the multi-common port multi-bandpass filter has an output that is impedance matched to one of the first common port, the second common port or the third common port while coupled to outputs of other analog filters in the multi-common port multi-bandpass filter.
14. The multi-common port multi-bandpass filter of claim 10 , wherein the multi-common port multi-bandpass filter further comprises:
a first signal trace that is coupled between the first common port, and divides to couple to each analog filter in the first set of two or more analog filters and each analog filter in the second set of one or more analog filters in the first multi-common port multi-bandpass filter;
a second signal trace that is coupled between the second common port, and divides to couple to each analog filter in the first set of two or more analog filters in the first multi-common port multi-bandpass filter; and
a third signal trace that is coupled between the third common port, and divides to couple to each analog filter in the second set of one or more analog filters in the first multi-common port multi-bandpass filter.
15. The multi-common port multi-bandpass filter of claim 14 , wherein a length of each of the first signal trace, the second signal trace and the third signal trace is less than 5 millimeters (mm).
16. The multi-common port multi-bandpass filter of claim 14 , wherein:
a length of the first signal trace from the first common port to each analog filter in the first set of two or more analog filters and the second set of one or more analog filters in the first multi-common port multi-bandpass filter has a substantially equal length;
a length of the second signal trace from the second common port to each analog filter in the first set of two or more analog filters in the first multi-common port multi-bandpass filter has a substantially equal length; and
a length of the third signal trace from the third common port to each analog filter in the second set of one or more analog filters in the first multi-common port multi-bandpass filter has a substantially equal length.
17. The multi-common port multi-bandpass filter of claim 10 , wherein the multi-common port multi-bandpass filter is associated with at least one of a high band frequency or a low band frequency, wherein the high band frequency includes one or more of third generation partnership project (3GPP) long term evolution (LTE) band 4 (B4), band 2 (B2), or band 25 (B25), and the low band frequency includes one or more of 3GPP LTE band 5 (B5), band 12 (B12) or band 13 (B13).
18. The multi-common port multi-bandpass filter of claim 10 , wherein the multi-common port multi-bandpass filter is included on a signal path of a repeater, wherein the signal path is a high band frequency signal path or a low band frequency signal path, and the signal path is one of a downlink signal path or an uplink signal path.
19. The multi-common port multi-bandpass filter of claim 10 , wherein:
each analog filter of the first set of two or more analog filters is configured for a separate uplink band or each analog filter of the first set of two or more analog filters is configured for a separate downlink band; and
each analog filter of the second set of two or more analog filters is configured for a separate uplink band or each analog filter of the second set of two or more analog filters is configured for a separate downlink band.
20. A dual-common port multi-bandpass filter, comprising:
two or more analog filters, wherein each analog filter of the two or more analog filters is configured for an uplink band or each analog filter of the two or more analog filters is configured for a downlink band;
a first common port coupled to an input of each of the two or more analog filters, wherein each analog filter is configured to filter one or more frequency bands;
a second common port coupled to an output of each of the two or more analog filters;
wherein each input of each of the two or more analog filters is impedance matched with the first common port; and
wherein each output of each of the two or more analog filters is impedance matched with the second common port; and
a matching network communicatively coupled to one or more of:
the input to each of the two or more analog filters in the dual-common port multi-bandpass filter; or
the output of each of the two or more analog filters in the dual-common port multi-bandpass filter,
wherein the matching network is operable to impedance match the two or more analog filters in the dual-common port multi-bandpass filter to operate together with the first common port or the second common port.
21. The dual-common port multi-bandpass filter of claim 20 , wherein each analog filter in the dual-common port multi-bandpass filter has one or more of an input that is impedance matched to the first common port while coupled to the inputs of other analog filters in the dual-common port multi-bandpass filter, or each analog filter in the dual-common port multi-bandpass filter has an output that is impedance matched to the second common port while coupled to the outputs of other analog filters in the dual-common port multi-bandpass filter.
22. The dual-common port multi-bandpass filter of claim 20 , wherein the dual-common port multi-bandpass filter further comprises:
a first signal trace that is coupled between the first common port, and divides to couple to the input to each of the two or more analog filters in the dual-common port multi-bandpass filter; and
a second signal trace that is coupled between the second common port, and divides to couple to the output of each of the two or more analog filters in the dual-common port multi-bandpass filter.
23. The dual-common port multi-bandpass filter of claim 22 , wherein a length of each of the first signal trace and the second signal trace is less than 5 millimeters (mm).
24. The dual-common port multi-bandpass filter of claim 22 , wherein:
a length of the first signal trace from the first common port to the input to each of the two or more analog filters has a substantially equal length; and
a length of the second signal trace from the second common port to the output of each of the two or more analog filters has a substantially equal length.
25. The dual-common port multi-bandpass filter of claim 20 , wherein each analog filter of the two or more analog filters is configured for a separate uplink band or each analog filter of the two or more analog filters is configured for a separate downlink band.
26. A multi-common port multi-bandpass filter, comprising:
a first common port coupled to a first matching network, wherein the first matching network is coupled to:
a first set of two or more analog filters in the multi-common port multi-bandpass filter, wherein each analog filter of the first set of two or more analog filters is configured for an uplink band or each analog filter of the first set of two or more analog filters is configured for a downlink band; and
a second set of one or more analog filters in the multi-common port multi-bandpass filter, wherein each analog filter of the second set of two or more analog filters is configured for an uplink band or each analog filter of the second set of two or more analog filters is configured for a downlink band;
a second common port coupled to the first set of two or more analog filters in the multi-common port multi-bandpass filter;
a third common port coupled to the second set of one or more analog filters in the multi-common port multi-bandpass filter,
wherein each analog filter in the multi-common port multi-bandpass filter is configured to filter one or more frequency bands; and
a second matching network coupled to one or more of the first set of two or more analog filters in the multi-common port multi-bandpass filter or the second set of one or more analog filters in the multi-common port multi-bandpass filter.
27. The multi-common port multi-bandpass filter of claim 26 , wherein each analog filter in the multi-common port multi-bandpass filter has an input that is impedance matched to one of the first common port, the second common port or the third common port while coupled to inputs of other analog filters in the multi-common port multi-bandpass filter, and each analog filter in the multi-common port multi-bandpass filter has an output that is impedance matched to one of the first common port, the second common port or the third common port while coupled to outputs of other analog filters in the multi-common port multi-bandpass filter.
28. The multi-common port multi-bandpass filter of claim 26 , wherein the multi-common port multi-bandpass filter further comprises:
a first signal trace that is coupled between the first common port, and divides to couple to each analog filter in the first set of two or more analog filters and each analog filter in the second set of one or more analog filters in the first multi-common port multi-bandpass filter;
a second signal trace that is coupled between the second common port, and divides to couple to each analog filter in the first set of two or more analog filters in the first multi-common port multi-bandpass filter; and
a third signal trace that is coupled between the third common port, and divides to couple to each analog filter in the second set of one or more analog filters in the first multi-common port multi-bandpass filter.
29. The multi-common port multi-bandpass filter of claim 28 , wherein a length of each of the first signal trace, the second signal trace and the third signal trace is less than 5 millimeters (mm).
30. The multi-common port multi-bandpass filter of claim 28 , wherein:
a length of the first signal trace from the first common port to each analog filter in the first set of two or more analog filters and the second set of one or more analog filters in the first multi-common port multi-bandpass filter has a substantially equal length;
a length of the second signal trace from the second common port to each analog filter in the first set of two or more analog filters in the first multi-common port multi-bandpass filter has a substantially equal length; and
a length of the third signal trace from the third common port to each analog filter in the second set of one or more analog filters in the first multi-common port multi-bandpass filter has a substantially equal length.
31. The multi-common port multi-bandpass filter of claim 26 , wherein:
each analog filter of the first set of two or more analog filters is configured for a separate uplink band or each analog filter of the first set of two or more analog filters is configured for a separate downlink band; and
each analog filter of the second set of two or more analog filters is configured for a separate uplink band or each analog filter of the second set of two or more analog filters is configured for a separate downlink band.