Switch filter bank

Abstract

The utility model provides a switch filter bank. The switch filter bank comprises a first switch, a first filter bank, a second switch, a third switch, a second filter bank and a fourth switch which are connected in sequence, the first filter bank comprises a first filter, a second filter, a third filter, a fourth filter and a fifth filter which are connected in parallel; the second filter bank comprises a sixth filter, a seventh filter, an eighth filter, a ninth filter and a tenth filter which are connected in parallel. The first switch, the second switch, the third switch and the fourth switch are all single-pole five-throw switches. According to the utility model, accurate frequency point output is obtained by cascading the two groups of filters and switching the switches, the requirements of distribution of the frequency points and segmentation of the filters are met, and only the switches of one switch filter group need to be switched when adjacent frequency points are output in the scheme. Meanwhile, the switching filter bank is designed by utilizing the scheme, and the use passband of the filter bank can be changed by changing the frequency band of one of the filter banks.

Description

Technical Field

[0001] This utility model relates to the field of electrical component technology, specifically to a switching filter bank. Background Technology

[0002] Currently, in the field of broadband channels, there are very high requirements for the operating bandwidth, spurious suppression, and signal power of frequency conversion channels, which increases the design difficulty. Switched filter banks are an important part of the broadband channel field, responsible for filtering out the signal frequency bands required by the project. Therefore, the design requirements for switched filter banks are constantly increasing, requiring sufficiently wide operating bandwidth, low insertion loss and high flatness in the passband, multiple frequency bands, and fast frequency band switching speed. Summary of the Invention

[0003] This invention addresses the issue of filter bandwidth by providing a switched filter bank. It utilizes two cascaded filter banks and a switching mechanism to achieve accurate frequency output, satisfying frequency distribution and filter segmentation requirements. Furthermore, when outputting adjacent frequencies, only one of the switched filter banks needs to be switched. Moreover, by designing a switched filter bank using this approach, the passband of the filter bank can be modified simply by changing the bandwidth of one of the filter banks.

[0004] This utility model provides a switching filter bank, including a first switch, a first filter bank, a second switch, a third switch, a second filter bank and a fourth switch connected in sequence;

[0005] The first filter bank includes a first filter and a second filter connected in parallel. One end of the first filter and the other end of the second filter are connected to the first switch and the other end of the second filter.

[0006] The second filter bank includes a sixth filter and a seventh filter connected in parallel. Both the sixth filter and the seventh filter are connected at one end to the third switch and at the other end to the fourth switch.

[0007] The first switch, the second switch, the third switch, and the fourth switch are all single-pole multi-throw switches;

[0008] The first filter has a frequency band of 5.8–6.2 GHz, the sixth filter has a frequency band of 5.8–6.7 GHz, the second filter has a frequency band of 6.3–7.2 GHz, and the seventh filter has a frequency band of 6.8–7.7 GHz.

[0009] In a preferred embodiment of the switch filter bank described in this utility model, the first filter bank further includes a third filter connected in parallel with both the first filter and the second filter, with one end of the third filter connected to the first switch and the other end connected to the second switch.

[0010] The second filter bank also includes an eighth filter, which is connected in parallel with the sixth and seventh filters. The eighth filter is connected to the third switch at one end and to the fourth switch at the other end.

[0011] In a preferred embodiment of the switching filter bank described in this utility model, the frequency band of the third filter is 7.3–8.2 GHz, and the frequency band of the eighth filter is 7.8–8.7 GHz.

[0012] In a preferred embodiment of the switch filter bank described in this utility model, the first filter bank further includes a fourth filter connected in parallel with the first filter, the second filter, and the third filter. One end of the fourth filter is connected to the first switch, and the other end is connected to the second switch.

[0013] The second filter bank also includes a ninth filter that is connected in parallel with the sixth, seventh and eighth filters. One end of the ninth filter is connected to the third switch and the other end is connected to the fourth switch.

[0014] In a preferred embodiment of the switching filter bank described in this utility model, the fourth filter has a frequency band of 8.3–9.2 GHz, and the ninth filter has a frequency band of 8.8–9.7 GHz.

[0015] In a preferred embodiment of the switch filter bank described in this utility model, the first filter bank further includes a fifth filter connected in parallel with the first filter, the second filter, the third filter, and the fourth filter. One end of the fifth filter is connected to the first switch, and the other end is connected to the second switch.

[0016] The second filter bank also includes a tenth filter, which is connected in parallel with the sixth, seventh, eighth and ninth filters. One end of the tenth filter is connected to the third switch and the other end is connected to the fourth switch.

[0017] In a preferred embodiment of the switching filter bank described in this utility model, the fifth filter has a frequency band of 9.3–10.2 GHz, and the tenth filter has a frequency band of 9.8–10.7 GHz.

[0018] In a preferred embodiment of the switch filter bank described in this utility model, the first switch, the second switch, the third switch, and the fourth switch are all single-pole five-throw switches.

[0019] This utility model has the following advantages:

[0020] This invention uses two cascaded filter groups and a switching mechanism to achieve accurate frequency output, satisfying the requirements for frequency distribution and filter segmentation. Furthermore, when outputting adjacent frequencies, this scheme only requires switching one of the switching filter groups. Additionally, by designing a switching filter group using this scheme, the passband of the filter group can be modified simply by changing the bandwidth of one of the filter groups. Attached Figure Description

[0021] Figure 1 This is a circuit diagram of a switching filter bank.

[0022] Figure label:

[0023] 1. First switch; 2. First filter bank; 21. First filter; 22. Second filter; 23. Third filter; 24. Fourth filter; 25. Fifth filter; 3. Second switch; 4. Third switch; 5. Second filter bank; 51. Sixth filter; 52. Seventh filter; 53. Eighth filter; 54. Ninth filter; 55. Tenth filter; 6. Fourth switch. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Example 1

[0026] like Figure 1 As shown, a switching filter bank includes a first switch 1, a first filter bank 2, a second switch 3, a third switch 4, a second filter bank 5, and a fourth switch 6 connected in sequence.

[0027] The first filter group 2 includes a first filter 21, a second filter 22, a third filter 23, a fourth filter 24 and a fifth filter 25 connected in parallel. One end of each of the first filter 21, the second filter 22, the third filter 23, the fourth filter 24 and the fifth filter 25 is connected to the first switch 1 and the other end is connected to the second switch 3.

[0028] The second filter group 5 includes a sixth filter 51, a seventh filter 52, an eighth filter 53, a ninth filter 54 and a tenth filter 55 connected in parallel. The sixth filter 51, the seventh filter 52, the eighth filter 53, the ninth filter 54 and the tenth filter 55 are all connected at one end to the third switch 4 and at the other end to the fourth switch 6.

[0029] The first filter 21 has a frequency band of 5.8–6.2 GHz, the second filter 22 has a frequency band of 6.3–7.2 GHz, the third filter 23 has a frequency band of 7.3–8.2 GHz, the fourth filter 24 has a frequency band of 8.3–9.2 GHz, and the fifth filter 25 has a frequency band of 9.3–10.2 GHz.

[0030] The frequency band of the sixth filter 51 is 5.8–6.7 GHz, the frequency band of the seventh filter 52 is 6.8–7.7 GHz, the frequency band of the eighth filter 53 is 7.8–8.7 GHz, the frequency band of the ninth filter 54 is 8.8–9.7 GHz, and the frequency band of the tenth filter 55 is 9.8–10.7 GHz.

[0031] The first switch 1, the second switch 3, the third switch 4, and the fourth switch 6 are all single-pole five-throw switches.

[0032] The usage method of this embodiment is as follows: when the first switch 1, the second switch 3, the third switch 4 and the fourth switch 6 turn on the first filter 21 and the sixth filter 51, a 6GHz frequency can be obtained through the overlap of the frequency bands of the first filter 21 and the sixth filter 51.

[0033] When the first switch 1, the second switch 3, the third switch 4 and the fourth switch 6 turn on the second filter 22 and the sixth filter 51, a frequency of 6.5 GHz can be obtained through the overlap of the frequency bands of the second filter 22 and the sixth filter 51.

[0034] When the first switch 1, the second switch 3, the third switch 4 and the fourth switch 6 turn on the second filter 22 and the seventh filter 52, a 7GHz frequency can be obtained through the overlap of the frequency bands of the second filter 22 and the seventh filter 52.

[0035] When the first switch 1, the second switch 3, the third switch 4 and the fourth switch 6 turn on the third filter 23 and the seventh filter 52, a frequency of 7.5 GHz can be obtained through the overlap of the frequency bands of the third filter 23 and the seventh filter 52.

[0036] When the first switch 1, the second switch 3, the third switch 4 and the fourth switch 6 turn on the third filter 23 and the eighth filter 53, the 8GHz frequency can be obtained through the overlap of the frequency bands of the third filter 23 and the eighth filter 53.

[0037] When the first switch 1, the second switch 3, the third switch 4 and the fourth switch 6 turn on the fourth filter 24 and the eighth filter 53, the frequency of 8.5 GHz can be obtained through the overlap of the frequency bands of the fourth filter 24 and the eighth filter 53.

[0038] When the first switch 1, the second switch 3, the third switch 4 and the fourth switch 6 turn on the fourth filter 24 and the ninth filter 54, a 9GHz frequency can be obtained through the overlap of the frequency bands of the fourth filter 24 and the ninth filter 54.

[0039] When the first switch 1, the second switch 3, the third switch 4 and the fourth switch 6 turn on the fifth filter 25 and the ninth filter 54, a frequency of 9.5 GHz can be obtained through the overlap of the frequency bands of the fifth filter 25 and the ninth filter 54.

[0040] When the first switch 1, the second switch 3, the third switch 4 and the fourth switch 6 turn on the fifth filter 25 and the tenth filter 55, a 10GHz frequency can be obtained through the overlap of the frequency bands of the fifth filter 25 and the tenth filter 55.

[0041] This embodiment achieves accurate frequency output through switching, meeting the output requirements of nine signal frequencies (6GHz, 6.5GHz, 7GHz, 7.5GHz, 8GHz, 8.5GHz, 9GHz, 9.5GHz, and 10GHz). Furthermore, when outputting adjacent frequencies, this scheme only requires switching one of the switching filter banks. Moreover, by designing a switching filter bank using this scheme, the passband of the filter bank can be modified simply by changing the frequency band of one of the filter banks.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A switching filter bank, characterized in that: It includes a first switch (1), a first filter bank (2), a second switch (3), a third switch (4), a second filter bank (5), and a fourth switch (6) connected in sequence. The first filter group (2) includes a first filter (21) and a second filter (22) connected in parallel. The first filter (21) and the second filter (22) are both connected at one end to the first switch (1) and at the other end to the second switch (3). The second filter group (5) includes a sixth filter (51) and a seventh filter (52) connected in parallel. Both the sixth filter (51) and the seventh filter (52) are connected at one end to the third switch (4) and at the other end to the fourth switch (6). The first switch (1), the second switch (3), the third switch (4) and the fourth switch (6) are all single-pole multi-throw switches; The first filter (21) has a frequency band of 5.8~6.2GHz, the sixth filter (51) has a frequency band of 5.8~6.7GHz, the second filter (22) has a frequency band of 6.3~7.2GHz, and the seventh filter (52) has a frequency band of 6.8~7.7GHz.

2. A switching filter bank according to claim 1, characterized in that: The first filter group (2) also includes a third filter (23) connected in parallel with both the first filter (21) and the second filter (22). One end of the third filter (23) is connected to the first switch (1) and the other end is connected to the second switch (3). The second filter group (5) also includes an eighth filter (53) that is connected in parallel with the sixth filter (51) and the seventh filter (52). One end of the eighth filter (53) is connected to the third switch (4) and the other end is connected to the fourth switch (6).

3. A switching filter bank according to claim 2, characterized in that: The frequency band of the third filter (23) is 7.3~8.2GHz, and the frequency band of the eighth filter (53) is 7.8~8.7GHz.

4. A switching filter bank according to claim 2, characterized in that: The first filter group (2) further includes a fourth filter (24) connected in parallel with the first filter (21), the second filter (22) and the third filter (23). One end of the fourth filter (24) is connected to the first switch (1) and the other end is connected to the second switch (3). The second filter group (5) also includes a ninth filter (54) that is connected in parallel with the sixth filter (51), the seventh filter (52) and the eighth filter (53). One end of the ninth filter (54) is connected to the third switch (4) and the other end is connected to the fourth switch (6).

5. A switching filter bank according to claim 4, characterized in that: The fourth filter (24) has a frequency band of 8.3~9.2GHz, and the ninth filter (54) has a frequency band of 8.8~9.7GHz.

6. A switching filter bank according to claim 4, characterized in that: The first filter group (2) further includes a fifth filter (25) which is connected in parallel with the first filter (21), the second filter (22), the third filter (23), and the fourth filter (24). One end of the fifth filter (25) is connected to the first switch (1), and the other end is connected to the second switch (3). The second filter group (5) also includes a tenth filter (55) that is connected in parallel with the sixth filter (51), the seventh filter (52), the eighth filter (53) and the ninth filter (54). One end of the tenth filter (55) is connected to the third switch (4) and the other end is connected to the fourth switch (6).

7. A switching filter bank according to claim 6, characterized in that: The fifth filter (25) has a frequency band of 9.3~10.2GHz, and the tenth filter (55) has a frequency band of 9.8~10.7GHz.

8. A switching filter bank according to claim 7, characterized in that: The first switch (1), the second switch (3), the third switch (4) and the fourth switch (6) are all single-pole five-throw switches.

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