A multi-channel cavity filter

Abstract

The utility model relates to electroplating hardware technology field, concretely relates to a kind of multi-channel cavity filter, including shell, the left and right sides of shell top are respectively downwardly provided with first inner cavity and second inner cavity, the bottom of first inner cavity is transversely fixed with multiple first partition webs and is separated into several first channels and several second channels;The bottom of second inner cavity is transversely fixed with multiple second partition webs and is separated into several third channels and several fourth channels, the surface of first inner cavity and second inner cavity is electroplated with copper layer, the surface of copper layer is electroplated with silver layer.The utility model's multi-channel cavity filter, by the copper layer and silver layer of the surface electroplating of first inner cavity and second inner cavity, the conductivity of filter cavity can be significantly improved, the improvement of conductivity can reduce energy loss and heat accumulation of filter under high power working condition, avoid the performance deterioration caused by temperature rise, also can effectively control production cost, improve filtering performance.

Description

Technical Field

[0001] This utility model relates to the field of electroplated hardware products technology, specifically to a multi-channel cavity filter. Background Technology

[0002] With the rapid development of signal processing equipment, the performance requirements for filters are becoming increasingly stringent. Traditional filters are made of aluminum or have a single coating plated on the surface of aluminum filters. The conductivity of the aluminum oxide insulating layer or single coating on the aluminum surface is poor. Under high power operating conditions, this not only affects the stability of filtering performance but also limits the average and peak power that the filter can handle, failing to meet the needs of high power application scenarios. Summary of the Invention

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a multi-channel cavity filter.

[0004] The objective of this utility model is achieved through the following technical solution: A multi-channel cavity filter includes a housing. A first inner cavity and a second inner cavity are respectively opened downward on the left and right sides of the top of the housing. Multiple first partitions are horizontally fixed at the bottom of the first inner cavity, dividing the first inner cavity into several first channels and several second channels, which are alternately arranged. Multiple second partitions are horizontally fixed at the bottom of the second inner cavity, dividing the second inner cavity into several third channels and several fourth channels, which are alternately arranged. The surfaces of the first inner cavity and the second inner cavity are electroplated with a copper plating layer, and the surface of the copper plating layer is electroplated with a silver plating layer.

[0005] Furthermore, a plurality of longitudinally alternating first input ports and second input ports are fixed at the top center of the housing. The bottom of each first input port is connected to the corresponding first channel and third channel, respectively, and the bottom of each second input port is connected to the corresponding second channel and fourth channel, respectively.

[0006] Furthermore, output ports are fixed on the left and right sides of the bottom of the housing, corresponding to the ends of each of the first, second, third, and fourth channels, and each output port is connected to the corresponding first, second, third, and fourth channels.

[0007] Furthermore, the first channel includes a first straight segment and a first transverse S-shaped filter segment connected in sequence. A first coupling window is provided between the tail end of the first straight segment and the head end of the first transverse S-shaped filter segment. A first fixing part is fixed at the head end of the first transverse S-shaped filter segment. Two first grooves for mounting the fly rod are opened on the top of the first fixing part. A first support rib is fixed at the tail end of the first transverse S-shaped filter segment. Multiple first resonant columns are fixed in the first straight segment. A first resonant column is fixed at each corner of the first transverse S-shaped filter segment. The multiple first resonant columns are coupled and connected through the first coupling window and the coupling rib.

[0008] Furthermore, the second channel includes a second transverse S-shaped filter segment and a second straight segment connected in sequence. A second support rib is fixed at the first end of the second transverse S-shaped filter segment, and a second fixing part is fixed at the tail end of the second transverse S-shaped filter segment. Two second grooves for mounting the fly rod are opened on the top of the second fixing part. A second coupling window is provided between the tail end of the second transverse S-shaped filter segment and the first end of the second straight segment. A second resonant column is fixed at each corner of the second S-shaped filter segment. Multiple second resonant columns are fixed in the second straight segment. The multiple second resonant columns are coupled and connected through the second coupling window and the coupling rib.

[0009] Furthermore, the third channel includes an N-shaped filter segment, an inverted V-shaped filter segment, and a third straight segment connected in sequence. A third fixing part is fixed at the downward opening of the N-shaped filter segment. Two third grooves for mounting the fly rod are opened on the top of the third fixing part. A third coupling window is provided between the tail end of the N-shaped filter segment and the head end of the inverted V-shaped filter segment. A fourth fixing part is fixed at the downward opening of the inverted V-shaped filter segment. A fourth groove for mounting the fly rod is opened on the top of the fourth fixing part. Third resonant pillars are fixed at the corners and ends of the N-shaped filter segment, the inverted V-shaped filter segment, and the third straight segment. Multiple third resonant pillars are coupled and connected through coupling ribs and third coupling windows.

[0010] Furthermore, the fourth channel includes a fourth straight segment, a V-shaped filter segment, and a U-shaped filter segment connected in sequence. A fifth fixing part is fixed at the upward opening of the V-shaped filter segment. A fifth groove for mounting the fly rod is provided on the top of the fifth fixing part. A fourth coupling window is provided between the tail end of the V-shaped filter segment and the head end of the U-shaped filter segment. A sixth fixing part is fixed at the upward opening of the U-shaped filter segment. Two sixth grooves for mounting the fly rod are provided on the top of the sixth fixing part. A fourth resonant column is fixed at the corners and ends of the fourth straight segment, the V-shaped filter segment, and the U-shaped filter segment. The fourth resonant column is coupled and connected through coupling ribs and the fourth coupling window.

[0011] Furthermore, the thickness of the copper plating layer is 6.5-7.5 μm.

[0012] Furthermore, the thickness of the silver plating layer is 0.75-1.25 μm.

[0013] The beneficial effects of this utility model are as follows: The multi-channel cavity filter of this utility model can improve the conductivity of the filter cavity by electroplating copper and silver layers on the surfaces of the first and second inner cavities. The improved conductivity can reduce energy loss and heat accumulation in the high-power operation state of the filter, avoid performance degradation caused by temperature rise, and reduce production costs. In addition, the multiple channels of the filter can independently correspond to different frequency bands, realize multi-frequency band parallel filtering function, meet the needs of synchronous processing of multiple different frequency signals in complex scenarios, and avoid signal crosstalk problems caused by excessive density of multiple channels in a single cavity. Attached Figure Description

[0014] Figure 1 This is a top view of the present invention.

[0015] Figure 2 This is a perspective view of the first channel and the second channel of this utility model.

[0016] Figure 3 This is a perspective view of the third and fourth channels described in this utility model.

[0017] Figure 4 This is a front view of the present invention.

[0018] Figure 5 This is a partial sectional view of the present invention.

[0019] The reference numerals in the attached drawings are as follows: 1. Housing; 11. First inner cavity; 12. Second inner cavity; 13. First partition rib; 14. Second partition rib; 15. First input port; 16. Second input port; 17. Output port; 2. First channel; 21. First straight segment; 22. First transverse S-shaped filter segment; 23. First coupling window; 24. First fixing part; 25. First groove; 26. First support rib; 27. First resonant column; 38. Second channel; 39. Second transverse S-shaped filter segment; 31. Second straight segment; 32. Second support rib; 33. Second fixing part; 34. Second groove; 35. Second coupling window. 36. Second resonant column; 37. Third channel; 4. N-type filter segment; 41. Inverted V-type filter segment; 42. Third straight segment; 43. Third fixing part; 44. Third groove; 45. Third coupling window; 47. Fourth fixing part; 48. Fourth groove; 49. Third resonant column; 40. Fourth channel; 5. Fourth straight segment; 51. V-type filter segment; 52. U-type filter segment; 53. Fifth fixing part; 54. Fifth groove; 55. Fourth coupling window; 57. Sixth fixing part; 58. Sixth groove; 59. Fourth resonant column; 50. Copper plating layer; 6. Silver plating layer; 7. Coupling rib; 8. Detailed Implementation

[0020] To facilitate understanding by those skilled in the art, the following description is provided in conjunction with embodiments and appendices. Figure 1-5The present invention will be further described below. The content mentioned in the embodiments is not intended to limit the present invention.

[0021] See Figure 1-5 A multi-channel cavity filter includes a housing 1. A first inner cavity 11 and a second inner cavity 12 are respectively formed downwards on the left and right sides of the top of the housing 1. Multiple first partitions 13 are horizontally fixed to the bottom of the first inner cavity 11, dividing it into several first channels 2 and several second channels 3, which are alternately arranged. Multiple second partitions 14 are horizontally fixed to the bottom of the second inner cavity 12, dividing it into several third channels 4 and several fourth channels 5, which are alternately arranged. Both the surfaces of the first inner cavity 11 and the second inner cavity 12 are electroplated with a copper plating layer 6, and the surface of the copper plating layer 6 is electroplated with a silver plating layer 7. Specifically, the structure of the first channel 2 is mirror-symmetrical to the structure of the second channel 3 with respect to the first partitions 13 that separate the first channel 2 and the second channel 3; the structure of the third channel 4 is mirror-symmetrical to the structure of the fourth channel 5 with respect to the second partitions 14 that separate the third channel 4 and the fourth channel 5.

[0022] The multi-channel cavity filter of this invention improves the conductivity of the filter cavity by electroplating a copper layer 6 and a silver layer 7 on the surfaces of the first inner cavity 11 and the second inner cavity 12. The improved conductivity reduces energy loss and heat accumulation in the filter under high-power operation, avoids performance degradation caused by temperature rise, and reduces production costs. In addition, the multiple channels of the filter can independently correspond to different frequency bands, realize multi-band parallel filtering function, meet the needs of synchronous processing of multiple different frequency signals in complex scenarios, and avoid signal crosstalk problems caused by excessive density of multiple channels in a single cavity.

[0023] In this embodiment, a plurality of longitudinally alternating first input ports 15 and second input ports 16 are fixed at the top center of the housing 1. The bottom of each first input port 15 is connected to the corresponding first channel 2 and third channel 4, respectively, and the bottom of each second input port 16 is connected to the corresponding second channel 3 and fourth channel 5, respectively. By setting multiple first input ports 15 and second input ports 16, external signals can be transmitted to the corresponding channels in the filter for signal processing.

[0024] In this embodiment, output ports 17 are fixed on the left and right sides of the bottom of the housing 1, corresponding to the ends of each of the first channel 2, second channel 3, third channel 4, and fourth channel 5. Each output port 17 is connected to the corresponding first channel 2, second channel 3, third channel 4, and fourth channel 5. By setting the output ports 17, the processed target signal can be transmitted to other devices.

[0025] In this embodiment, the first channel 2 includes a first straight segment 21 and a first transverse S-shaped filter segment 22 connected in sequence. A first coupling window 23 is provided between the tail end of the first straight segment 21 and the head end of the first transverse S-shaped filter segment 22. A first fixing part 24 is fixed at the head end of the first transverse S-shaped filter segment 22. Two first grooves 25 for mounting the fly rod are opened on the top of the first fixing part 24. A first support rib 26 is fixed at the tail end of the first transverse S-shaped filter segment 22. Multiple first resonant pillars 27 are fixed to the first straight segment 21. A first resonant pillar 27 is fixed at each corner of the first transverse S-shaped filter segment 22. The multiple first resonant pillars 27 are coupled and connected through the first coupling window 23 and the coupling rib 8. The above structure enables the first channel 2 to form a specific filtering structure, ensuring low-loss passage of the target signal frequency band and achieving signal filtering in the 830-880MHz frequency band.

[0026] In this embodiment, the second channel 3 includes a second transverse S-shaped filter section 31 and a second straight section 32 connected in sequence. A second support rib 33 is fixed to the first end of the second transverse S-shaped filter section 31, and a second fixing part 34 is fixed to the tail end of the second transverse S-shaped filter section 31. Two second grooves 35 for mounting the fly rod are provided on the top of the second fixing part 34. A second coupling window 36 is provided between the tail end of the second transverse S-shaped filter section 31 and the first end of the second straight section 32. A second resonant column 37 is fixed at each corner of the second S-shaped filter section. Multiple second resonant columns 37 are fixed to the second straight section 32, and these multiple second resonant columns 37 are coupled together through the second coupling window 36 and the coupling rib 8. This structure enables the second channel 3 to form a specific filtering structure, ensuring low-loss passage of the target signal frequency band and achieving signal filtering in the 920-960MHz frequency band.

[0027] In this embodiment, the third channel 4 includes an N-shaped filter segment 41, an inverted V-shaped filter segment 42, and a third straight segment 43 connected in sequence. A third fixing part 44 is fixed to the downward-facing opening of the N-shaped filter segment 41. Two third grooves 45 for mounting a fly rod are formed on the top of the third fixing part 44. A third coupling window 47 is provided between the tail end of the N-shaped filter segment 41 and the head end of the inverted V-shaped filter segment 42. A fourth fixing part 48 is fixed to the downward-facing opening of the inverted V-shaped filter segment 42. A fourth groove 49 for mounting a fly rod is formed on the top of the fourth fixing part 48. Third resonant pillars 40 are fixed at the corners and ends of the N-shaped filter segment 41, the inverted V-shaped filter segment 42, and the third straight segment 43. Multiple third resonant pillars 40 are coupled together through coupling ribs 8 and third coupling windows 47. This structure enables the third channel 4 to form a specific filtering structure, ensuring low-loss passage of the target signal frequency band and achieving signal filtering in the 1835-1855MHz frequency band.

[0028] In this embodiment, the fourth channel 5 includes a fourth straight segment 51, a V-shaped filter segment 52, and a U-shaped filter segment 53 connected in sequence. A fifth fixing part 54 is fixed at the upward opening of the V-shaped filter segment 52. The top of the fifth fixing part 54 has a fifth groove 55 for mounting a fly rod. A fourth coupling window 57 is provided between the tail end of the V-shaped filter segment 52 and the head end of the U-shaped filter segment 53. A sixth fixing part 58 is fixed at the upward opening of the U-shaped filter segment 53. The top of the sixth fixing part 58 has two sixth grooves 59 for mounting a fly rod. A fourth resonant column 50 is fixed at the corners and ends of the fourth straight segment 51, the V-shaped filter segment 52, and the U-shaped filter segment 53. The fourth resonant column 50 is coupled to the fourth coupling window 57 through a coupling rib 8. The above structure enables the fourth channel 5 to form a specific filtering structure, ensuring low-loss passage of the target signal frequency band and achieving signal filtering in the 1740-1760MHz frequency band.

[0029] In this embodiment, the thickness of the copper plating layer 6 is 6.5-7.5 μm. To achieve the best performance of this invention, the optimal thickness of the copper plating layer 6 is 7 μm.

[0030] In this embodiment, the thickness of the silver plating layer 7 is 0.75-1.25 μm. To achieve the best performance of this invention, the optimal thickness of the silver plating layer 7 is 1 μm.

[0031] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this utility model are within the protection scope of this utility model.

Claims

1. A multi-channel cavity filter, comprising a housing, characterized in that: The top of the shell has a first inner cavity and a second inner cavity respectively, which are opened downward on the left and right sides. The bottom of the first inner cavity has multiple first partitions fixed horizontally, which divide the first inner cavity into several first channels and several second channels, which are arranged alternately. The bottom of the second inner cavity has multiple second partitions fixed horizontally, which divide the second inner cavity into several third channels and several fourth channels, which are arranged alternately. The surfaces of the first inner cavity and the second inner cavity are electroplated with copper plating, and the surface of the copper plating is electroplated with silver plating.

2. A multi-channel cavity filter according to claim 1, characterized in that: The top center of the housing has a plurality of longitudinally alternating first input ports and second input ports. The bottom of each first input port is connected to the corresponding first channel and third channel, respectively, and the bottom of each second input port is connected to the corresponding second channel and fourth channel, respectively.

3. A multi-channel cavity filter according to claim 1, characterized in that: The bottom of the housing has fixed output ports on the left and right sides corresponding to the ends of each of the first, second, third, and fourth channels, and each output port is connected to the corresponding first, second, third, and fourth channels.

4. A multi-channel cavity filter according to claim 1, characterized in that: The first channel includes a first straight segment and a first transverse S-shaped filter segment connected in sequence. A first coupling window is provided between the tail end of the first straight segment and the head end of the first transverse S-shaped filter segment. A first fixing part is fixed at the head end of the first transverse S-shaped filter segment. Two first grooves for mounting the fly rod are opened on the top of the first fixing part. A first support rib is fixed at the tail end of the first transverse S-shaped filter segment. Multiple first resonant columns are fixed in the first straight segment. A first resonant column is fixed at each corner of the first transverse S-shaped filter segment. The multiple first resonant columns are coupled and connected through the first coupling window and the coupling rib.

5. A multi-channel cavity filter according to claim 1, characterized in that: The second channel includes a second transverse S-shaped filter segment and a second straight segment connected in sequence. A second support rib is fixed at the first end of the second transverse S-shaped filter segment, and a second fixing part is fixed at the tail end of the second transverse S-shaped filter segment. Two second grooves for mounting the fly rod are opened on the top of the second fixing part. A second coupling window is provided between the tail end of the second transverse S-shaped filter segment and the first end of the second straight segment. A second resonant column is fixed at each corner of the second S-shaped filter segment. Multiple second resonant columns are fixed in the second straight segment. The multiple second resonant columns are coupled and connected through the second coupling window and the coupling rib.

6. A multi-channel cavity filter according to claim 1, characterized in that: The third channel includes an N-shaped filter segment, an inverted V-shaped filter segment, and a third straight segment connected in sequence. A third fixing part is fixed at the downward opening of the N-shaped filter segment. Two third grooves for mounting the fly rod are opened on the top of the third fixing part. A third coupling window is provided between the tail end of the N-shaped filter segment and the head end of the inverted V-shaped filter segment. A fourth fixing part is fixed at the downward opening of the inverted V-shaped filter segment. A fourth groove for mounting the fly rod is opened on the top of the fourth fixing part. Third resonant pillars are fixed at the corners and ends of the N-shaped filter segment, the inverted V-shaped filter segment, and the third straight segment. Multiple third resonant pillars are coupled and connected through coupling ribs and third coupling windows.

7. A multi-channel cavity filter according to claim 1, characterized in that: The fourth channel includes a fourth straight segment, a V-shaped filter segment, and a U-shaped filter segment connected in sequence. A fifth fixing part is fixed at the upward opening of the V-shaped filter segment. A fifth groove for mounting the fly rod is opened at the top of the fifth fixing part. A fourth coupling window is provided between the tail end of the V-shaped filter segment and the head end of the U-shaped filter segment. A sixth fixing part is fixed at the upward opening of the U-shaped filter segment. Two sixth grooves for mounting the fly rod are opened at the top of the sixth fixing part. A fourth resonant column is fixed at the corner and end of the fourth straight segment, the V-shaped filter segment, and the U-shaped filter segment. The fourth resonant column is coupled and connected through coupling ribs and the fourth coupling window.

8. A multi-channel cavity filter according to claim 1, characterized in that: The thickness of the copper plating layer is 6.5-7.5 μm.

9. A multi-channel cavity filter according to claim 1, characterized in that: The thickness of the silver plating layer is 0.75-1.25 μm.

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