Coupling filter

Abstract

The utility model discloses a coupling filter, which is provided with a cavity, a cover plate, a first resonant rod and a second resonant rod, the cover plate covers the cavity and forms a first resonant cavity, a second resonant cavity and a coupling window with the cavity, and the first resonant rod and the second resonant rod are respectively arranged in the first resonant cavity and the second resonant cavity. The coupling filter is further provided with a step and a coupling piece, the step is located between the first resonance rod and the second resonance rod, and the coupling piece is fixedly connected to the step. The coupling piece between the first resonance rod and the second resonance rod can remarkably enhance low-frequency-band strong magnetic coupling of the first resonance rod and the second resonance rod, and the coupling strength between the first resonance rod and the second resonance rod can be adjusted through deformation of the coupling piece along the steps. Therefore, the coupling strength of the first resonance rod and the second resonance rod can meet the actual use requirement.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter technical field, concretely relates to a coupling filter. BACKGROUND

[0002] In the communication field, filter becomes indispensable frequency selector device, and current electromagnetic mixed coupling filter is widely used in various filters.

[0003] The filter coupling of prior art is provided with first cavity, second cavity and first resonant rod and second resonant rod installed in first cavity and second cavity respectively, and first cavity and second cavity are connected through coupling window connected between first cavity and second cavity, and first resonant rod and second resonant rod are coupled through coupling window.

[0004] In order to strengthen the coupling strength of coupling filter, the coupling adjustment component for strengthening the coupling strength of first resonant rod and second resonant rod is usually arranged between first resonant rod and second resonant rod of the filter coupling of prior art, although the coupling filter of prior art can strengthen coupling to a certain extent through the arrangement of coupling adjustment component, but it is difficult to adjust the coupling strength of coupling filter. SUMMARY

[0005] The utility model aims at overcoming the above technical insufficient, proposes a kind of coupling filter, solves the technical problem that the coupling filter of filter in prior art is difficult to adjust coupling strength.

[0006] In order to achieve the above technical purpose, the utility model adopts the following technical scheme:

[0007] Firstly, the utility model provides a kind of coupling filter, comprising:

[0008] Cavity;

[0009] Cover plate, connection in the cavity, and with the cavity and first resonant cavity, second resonant cavity and coupling window are formed;

[0010] First resonant rod, is installed in the first resonant cavity;

[0011] Second resonant rod, is installed in the second resonant cavity, and the second resonant rod is coupled with the first resonant rod through the coupling window;

[0012] Step, between the first resonant rod and the second resonant rod;And

[0013] Coupling piece, is fixed in the step, and the coupling of the second resonant rod and the first resonant rod is adjusted by deformation.

[0014] In some embodiments, the coupling member comprises a coupling adjusting portion and a connecting head, the connecting head is fixed to the step, and the coupling adjusting portion is connected to the connecting head and extends out of the step.

[0015] In some embodiments, the step is arranged in the coupling window, the coupling adjusting portion is arranged in the coupling window and extends along the length direction of the coupling window, and the connecting head is connected to the end of the coupling adjusting portion.

[0016] In some embodiments, the step is arranged in the coupling window, the coupling adjusting portion is arranged in the coupling window and extends along the length direction of the coupling window, and the connecting head is connected to the end of the coupling adjusting portion.

[0017] In some embodiments, the step is arranged in the first resonant cavity and the second resonant cavity, the two ends of the coupling adjusting portion extend to the first resonant rod and the second resonant rod along the width direction of the coupling window respectively, and the connecting head is connected to the two ends of the coupling adjusting portion.

[0018] In some embodiments, the cover plate is provided with an operation port, the operation port is communicated with the coupling window and opposite to the coupling member, and an operating tool is inserted in the operation port, the operating tool being used for controlling the deformation of the coupling member.

[0019] In some embodiments, the coupling filter further comprises a coupling boss, the coupling boss being arranged in the coupling window and extending along the length direction of the coupling window.

[0020] In some embodiments, the cover plate is provided with a thinning area, the thinning area being opposite to the coupling boss.

[0021] Compared with the prior art, the coupling filter provided by the utility model is provided with a cavity, a cover plate, a first resonant rod and a second resonant rod, the cover plate is arranged on the cavity, the cavity, the cover plate and the first resonant rod and the second resonant rod form a first resonant cavity, a second resonant cavity and a coupling window, the first resonant rod and the second resonant rod are arranged in the first resonant cavity and the second resonant cavity respectively, the first resonant rod and the second resonant rod are coupled through the coupling window, the coupling filter is further provided with a step and a coupling member, the step is located between the first resonant rod and the second resonant rod, and the coupling member is fixed to the step, so that the coupling member is located between the first resonant rod and the second resonant rod, the coupling member between the first resonant rod and the second resonant rod can significantly strengthen the low-frequency strong magnetic coupling of the first resonant rod and the second resonant rod, and the coupling strength between the first resonant rod and the second resonant rod can be adjusted through the deformation of the coupling member along the step, so that the coupling strength of the first resonant rod and the second resonant rod can meet the actual use requirement. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1is a structural schematic view of the coupling filter provided by the embodiment of the utility model;

[0023] Figure 2 is Figure 1 is a top view of the coupling filter;

[0024] Figure 3 is along Figure 2 is a sectional view along the line A-A in the coupling filter;

[0025] Figure 4 is a top view of the coupling filter provided by the second embodiment of the utility model;

[0026] Figure 5 is along Figure 4 is a sectional view along the line A-A in the coupling filter;

[0027] Figure 6 is a structural schematic view of the coupling filter provided by the third embodiment of the utility model;

[0028] Figure 7 is Figure 6 is a top view of the coupling filter;

[0029] Figure 8 is along Figure 7 is a sectional view along the line A-A in the coupling filter.

[0030] Reference numerals in the drawings:

[0031] 10 - cavity 11 - first resonant cavity 12 - second resonant cavity

[0032] 13 - coupling window 20 - cover plate 21 - thinning area

[0033] 22 - operating port 30 - first resonant rod 40 - second resonant rod

[0034] 50 - step 60 - coupling member 70 - coupling boss. DETAILED DESCRIPTION

[0035] In order to make the utility model purposes, technical scheme and advantages more clearly, the following is combined with the drawings and embodiment, and the utility model is further detailedly explained.It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0036] In order to solve the technical problem that the coupling strength of the coupling filter is difficult to adjust in the prior art.The coupling filter provided by the embodiment of the utility model can realize the adjustment of the low-frequency band strong magnetic coupling strength between resonant rods.

[0037] As Figures 1-5The utility model discloses a coupling filter, which comprises a cavity 10, a cover plate 20, a first resonant rod 30, a second resonant rod 40, a step 50 and a coupling member 60.

[0038] Specifically, the coupling filter is provided with the cavity 10, the cover plate 20, the first resonant rod 30 and the second resonant rod 40. The cover plate 20 and the cavity 10 enclose the first resonant cavity 11, the second resonant cavity 12 and the coupling window 13. The first resonant rod 30 and the second resonant rod 40 are respectively arranged in the first resonant cavity 11 and the second resonant cavity 12. The first resonant rod 30 and the second resonant rod 40 are coupled through the coupling window 13. The coupling filter is further provided with the step 50 and the coupling member 60. The step 50 is located between the first resonant rod 30 and the second resonant rod 40. The coupling member 60 is fixed to the step 50, so that the coupling member 60 is located between the first resonant rod 30 and the second resonant rod 40. The coupling member 60 between the first resonant rod 30 and the second resonant rod 40 can significantly strengthen the low-frequency strong magnetic coupling of the first resonant rod 30 and the second resonant rod 40. The coupling strength between the first resonant rod 30 and the second resonant rod 40 can be adjusted through the deformation of the coupling member 60 along the step 50. Therefore, the coupling strength of the first resonant rod 30 and the second resonant rod 40 can meet the actual use requirements. The coupling strength of the first resonant rod 30 and the second resonant rod 40 can be adjusted without screws, thereby effectively reducing the size and volume of the filter in the system.

[0039] In the embodiment, the first resonant cavity 11 and the second resonant cavity 12 are connected through the coupling window 13. The first resonant cavity 11 and the second resonant cavity 12 are cylindrical cavities that are spaced apart. The coupling window 13 is a cavity structure connected between the first resonant cavity 11 and the second resonant cavity 12.

[0040] In the embodiment, the cover plate 20 is arranged on the cavity 10. The cover plate 20 is detachably fixed to the cavity 10 through bolts.

[0041] In one of the embodiments, as shown in Figure 8As shown, the coupling filter further comprises a coupling boss 70 arranged in the coupling window 13 and extending along the length direction of the coupling window 13. Specifically, the coupling filter can reduce the length of the coupling window 13 by arranging the coupling boss 70 in the coupling window 13, thereby increasing the coupling strength of the first resonant rod 30 and the second resonant rod 40 and increasing the coupling sensitivity of the first resonant rod 30 and the second resonant rod 40, thereby facilitating the adjustment of the coupling strength of the first resonant rod 30 and the second resonant rod 40 while satisfying the high-strength coupling of the first resonant rod 30 and the second resonant rod 40.

[0042] In one embodiment, as shown in Figures 6-8 The cover plate 20 is provided with a thinning area 21 opposite the coupling boss 70. Specifically, the thinning area 21 is relatively thin in thickness, making it easy to deform. By this structure, when increasing the coupling sensitivity of the first resonant rod 30 and the second resonant rod 40, only need to press the thinning area 21 of the cover plate 20 to deform the thinning area 21 towards the direction of the coupling boss 70, thereby facilitating the adjustment of the coupling sensitivity of the first resonant rod 30 and the second resonant rod 40.

[0043] In one embodiment, as shown in Figure 8 The coupling boss 70 extends towards the direction of the thinning area 21. Specifically, by extending the coupling boss 70 towards the direction of the thinning area 21, the distance between the coupling boss 70 and the thinning area 21 can be reduced, thereby improving the coupling sensitivity of the first resonant rod 30 and the second resonant rod 40.

[0044] In this embodiment, the first resonant rod 30 and the second resonant rod 40 are provided with a resonant cavity structure, and the resonant cavity structure is coupled through the coupling window 13.

[0045] In one embodiment, to facilitate the deformation of the coupling member 60, as shown in Figures 1-5 The cover plate 20 is provided with an operation port 22 communicating with the coupling window 13 and opposite the coupling member 60, for inserting a control tool, the control tool being used to control the deformation of the coupling member 60. Specifically, in the process of controlling the deformation of the coupling member 60, the control tool is inserted into the coupling window 13 through the operation port 22 to drive the coupling member 60 to deform, thereby adjusting the coupling strength of the first resonant rod 30 and the second resonant rod 40, thereby facilitating the adjustment of the coupling strength of the first resonant rod 30 and the second resonant rod 40.

[0046] In this embodiment, the control tool is a probe structure with a hook. By pressing the coupling member 60, the probe structure can cause the coupling member 60 to deform downward, thereby reducing the coupling strength of the first resonant rod 30 and the second resonant rod 40. By hooking the coupling member 60 with the hook and pulling the coupling member 60 upward, the probe structure can cause the coupling member 60 to deform upward, thereby increasing the coupling strength of the first resonant rod 30 and the second resonant rod 40.

[0047] Understandably, the shape and position of the coupling element 60 can be adaptively set according to the coupling strength requirements of the first resonant rod 30 and the second resonant rod 40, and it can be in the form of a sheet, a rod, or the like.

[0048] In this embodiment, the coupling element 60 is a sheet-like conductor.

[0049] In one embodiment, the coupling member 60 includes a coupling adjustment part and a connector, the connector being fixedly connected to the step 50, and the coupling adjustment part being connected to the connector and extending out of the step 50.

[0050] In this embodiment, the connector is fixed to the step 50 by screws.

[0051] Understandably, the step 50 can be located at any position between the first resonant rod 30 and the second resonant rod 40, as long as the coupling member 60 can be positioned between the first resonant rod 30 and the second resonant rod 40.

[0052] In one embodiment, such as Figure 5 As shown, step 50 is installed in coupling window 13, coupling adjustment part is disposed in coupling window 13 and extends along the length direction of coupling window 13, and connector is connected to the end of coupling adjustment part. Specifically, by setting step 50 in coupling window 13, the stable deformation of coupling plate extending along the length direction of coupling window 13 is adapted, thereby satisfying the adjustment of coupling strength of this type of coupling filter.

[0053] In another embodiment, such as Figure 3 As shown, step 50 is installed in the first resonant cavity 11 and the second resonant cavity 12. Both ends of the coupling adjustment section extend along the width direction of the coupling window 13 to the first resonant rod 30 and the second resonant rod 40, respectively, and a connector is attached to both ends of the coupling adjustment section. Specifically, by setting step 50 in the first resonant cavity 11 and the second resonant cavity 12, the stable deformation of the coupling member 60 extending to the first resonant rod 30 and the second resonant rod 40 is adapted, thereby satisfying the adjustment of the coupling strength of this type of high-strength coupling filter.

[0054] The specific implementation of the utility model above does not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A coupled filter, characterized by, The coupling filter comprises: a cavity; a cover plate connected to the cavity and forming a first resonant cavity, a second resonant cavity and a coupling window with the cavity; a first resonant rod arranged in the first resonant cavity; a second resonant rod arranged in the second resonant cavity, the second resonant rod being coupled with the first resonant rod through the coupling window; a step between the first resonant rod and the second resonant rod; and a coupling member fixed to the step and adjusting the coupling between the second resonant rod and the first resonant rod by deformation. The coupling member comprises a coupling adjusting part and a connecting head, the connecting head being fixed to the step, and the coupling adjusting part being connected to the connecting head and extending out of the step.

2. The coupled filter of claim 1, wherein, The step is arranged in the coupling window, the coupling adjusting part is arranged in the coupling window and extends along the length direction of the coupling window, and the connecting head is connected to the end of the coupling adjusting part.

3. The coupled filter of claim 2, wherein, The step is arranged in the first resonant cavity and the second resonant cavity, and the two ends of the coupling adjusting part extend to the first resonant rod and the second resonant rod along the width direction of the coupling window, respectively, and the connecting head is connected to the two ends of the coupling adjusting part.

4. The coupled filter of claim 3, wherein, The cover plate is provided with an operation port, the operation port being communicated with the coupling window and opposite to the coupling member, for inserting a control tool, the control tool being used for controlling the deformation of the coupling member.

5. The coupled filter according to any one of claims 1-4, wherein, The coupling filter further comprises a coupling boss, the coupling boss being arranged in the coupling window and extending along the length direction of the coupling window.

6. The coupled filter according to any one of claims 1-4, wherein, The cover plate is provided with a thinning area, the thinning area being opposite to the coupling boss.

7. The coupled filter of claim 6, wherein, ​

Images