Coupling capacitor structure convenient to adjust and filter

Abstract

The utility model provides a coupling capacitor structure convenient to adjust and a filter, and belongs to the technical field of communication, the coupling capacitor structure comprises a cavity, a resonance rod and a capacitor metal sheet, the capacitor metal sheet is provided with a first turnup support lug, the first turnup support lug is bent towards one side of the capacitor metal sheet, and the first turnup support lug is provided with a second turnup support lug. A first flanging support lug is arranged between the capacitor metal sheet and the cavity, a second flanging support lug is arranged at one end, far away from the capacitor metal sheet, of the first flanging support lug, the second flanging support lug is bent towards one side of the first flanging support lug, and the second flanging support lug and the resonance rod are arranged at an interval. Therefore, a transmission zero point is formed across the cavity, a capacitor is formed between the second flanging support lug and the resonance rod, the length and the width of the projection of the second flanging support lug in the direction of forming the capacitor on the resonance rod and the spacing distance between the second flanging support lug and the resonance rod are adjusted, the capacitance intensity adjustment is realized, the adjustment range is large, the adjustment is convenient, and the efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of communication, and in particular relates to a coupling capacitor structure and a filter which are convenient to adjust. Background Art

[0002] With the rapid development of the communication industry, filters are trending towards integration and miniaturization. Customers often need to adopt a direct cavity form for product RF integration, and need to add transmission zeros at the low end of the frequency, fully suppress, etc., which requires adding capacitors across the cavity to achieve.

[0003] like Figure 1 As shown, the flying rod capacitor of the traditional filter is provided with the flying rod 3 in the cavity 1, which occupies a large cavity space. The capacitance strength can only be adjusted by changing the flying rod length and other measures, and the frequency adjustment is inevitably inductive and the adjustment range is small.

[0004] like Figure 2 As shown, the metal copper sheet capacitor of the traditional filter is provided with a metal copper sheet 4 in the cavity 1. Although it is simple in form and occupies a small cavity space, the frequency adjustment is inevitably sensitive and the adjustment range is small, which has a certain impact on the manufacturing of the product. Utility Model Content

[0005] The technical purpose of the utility model is to provide a coupling capacitor structure and a filter that are easy to adjust, aiming to solve the problems of small frequency adjustment range and inconvenient adjustment of existing filters.

[0006] To solve the above technical problems, the utility model is implemented as follows: a filter with convenient capacitance strength adjustment comprises: a cavity, a resonance rod and a capacitor metal sheet, the resonance rod and the capacitor metal sheet are fixed inside the cavity, an insulating support body is provided between the capacitor metal sheet and the cavity, a first flanged ear is provided on the capacitor metal sheet, the first flanged ear is bent toward one side of the capacitor metal sheet, and a second flanged ear is further provided at one end of the first flanged ear away from the capacitor metal sheet, the second flanged ear is bent toward one side of the first flanged ear, the second flanged ear is spaced from the resonance rod, and a capacitor is formed between the second flanged ear and the resonance rod.

[0007] Furthermore, the first flanged ears are provided at both ends of the capacitor metal sheet, and the second flanged ears on the two first flanged ears respectively form the capacitor with the resonant rods in two spaced-apart coupling cavities.

[0008] Furthermore, a metal sheet fixing column is provided at the bottom of the cavity, the capacitor metal sheet is fixed on the upper side of the metal sheet fixing column, and the insulating support body is arranged between the metal sheet fixing column and the capacitor metal sheet.

[0009] Furthermore, the upper end of the resonance rod has a resonance rod disk folded outward, and the capacitor is formed between the second flanged ear and the resonance rod disk.

[0010] Furthermore, the first flanged lugs are folded toward the upper side of the capacitor metal sheet, and the second flanged lugs are arranged at intervals on the lower side of the resonance rod disk.

[0011] Furthermore, the first flanged lug is located on a side of the capacitor metal sheet away from the resonance rod.

[0012] Furthermore, the second flanged support ear is located on a side of the first flanged support ear close to the resonance rod.

[0013] Furthermore, the capacitor metal sheet, the first flanged lug and the second flanged lug are an integrally stamped structure.

[0014] Furthermore, a resonance rod fixing column is provided at the bottom of the cavity, and the lower end of the resonance rod is fixed to the upper side of the resonance rod fixing column by means of screws.

[0015] The utility model also provides a filter, including the above-mentioned coupling capacitor structure and a cover plate, an adjusting screw and an adjusting nut, wherein the cover plate is arranged on the opening side of the cavity, the adjusting screw is arranged on the cover plate and fixed by the adjusting nut, and one end of the adjusting screw is arranged on the inner side of the resonant rod.

[0016] Compared with the prior art, the coupling capacitor structure and filter of the utility model which are easy to adjust have the following beneficial effects:

[0017] By providing an insulating support body between the capacitor metal sheet and the cavity, a transmission zero point is formed across the cavity, and a capacitor is formed between the second flanged support ear and the resonance rod. By adjusting the length and width of the projection of the second flanged support ear in the direction of the capacitor formed on the resonance rod and the spacing between the second flanged support ear and the resonance rod, the capacitance strength can be adjusted. The adjustment range is large, the adjustment is convenient, and the efficiency is high.

[0018] The capacitor metal sheet is easy to install and has reliable connection. The capacitor metal sheet, the first flanged support ear and the second flanged support ear are an integrated stamping structure, which is easy to process and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the flying rod capacitor structure of a traditional filter.

[0020] Figure 2 This is a schematic diagram of the metal copper sheet capacitor structure of a traditional filter.

[0021] Figure 3 It is a three-dimensional cross-sectional view along the first direction of the filter in an embodiment of the utility model.

[0022] Figure 4 It is a cross-sectional view along the second direction of the filter in an embodiment of the utility model.

[0023] Figure 5 yes Figure 4 Partial view of the cross-sectional view at DD in the figure.

[0024] Figure 6 It is a schematic diagram of the structure of the capacitor metal sheet in the embodiment of the utility model.

[0025] Figure 7 This is a simulation diagram of cross-cavity capacitor coupling of a traditional filter.

[0026] Figure 8 It is a simulation diagram of the cross-cavity capacitance coupling of the filter in the embodiment of the utility model.

[0027] Figure 7 and Figure 8 The horizontal axes are all F frequency range (GHz), and the vertical axes are all coupling absolute value size (dB).

[0028] In the accompanying drawings, each reference numeral represents:

[0029] 1. Cavity; 2. Resonant rod; 3. Flying rod; 4. Metal copper sheet; 5. Resonant rod disk; 6. Cover plate; 7. Adjusting screw; 8. Adjusting nut; 9. Capacitor metal sheet; 10. First flanged support ear; 11. Second flanged support ear; 12. Metal sheet fixing column; 13. Insulating support body; 14. Resonant rod fixing column. DETAILED DESCRIPTION

[0030] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the utility model, and cannot be understood as limiting the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] Example:

[0034] See also Figure 3-6 In this embodiment, the filter includes a coupling capacitor structure that is easy to adjust, and the coupling capacitor structure that is easy to adjust includes: a cavity 1, a resonance rod 2 and a capacitor metal sheet 9, the resonance rod 2 and the capacitor metal sheet 9 are fixed on the inner side of the cavity 1, a first flanged ear 10 is provided on the capacitor metal sheet 9, the first flanged ear 10 is bent toward one side of the capacitor metal sheet 9, and a second flanged ear 11 is further provided at one end of the first flanged ear 10 away from the capacitor metal sheet 9, the second flanged ear 11 is bent toward one side of the first flanged ear 10, the second flanged ear 11 is spaced apart from the resonance rod 2, and a capacitor is formed between the second flanged ear 11 and the resonance rod disk 5.

[0035] The filter also includes a cover plate 6, an adjusting screw 7 and an adjusting nut 8. The cover plate 6 is arranged on the opening side of the cavity 1, and the cover plate 6 is fixedly connected to the cavity 1 by screws. The adjusting screw 7 is arranged on the cover plate 6 and fixed by the adjusting nut 8, and one end of the adjusting screw 7 is arranged on the inner side of the resonance rod 2.

[0036] The resonance rod 2 is cylindrical, and the upper end of the resonance rod 2 has a resonance rod plate 5 folded outward. A resonance rod fixing column 14 is provided at the bottom of the cavity 1, and the lower end of the resonance rod 2 is fixed to the upper side of the resonance rod fixing column 14 by screws.

[0037] A metal sheet fixing column 12 is provided at the bottom of the cavity 1, and two ends of the capacitor metal sheet 9 are respectively fixed on the upper side of the metal sheet fixing column 12, and an insulating support body 13 is provided between the metal sheet fixing column 12 and the capacitor metal sheet 9. The two ends of the capacitor metal sheet 9 are respectively arranged in two spaced coupling cavities of the cavity 1. By arranging the insulating support body 13 between the capacitor metal sheet 9 and the cavity 1, a transmission zero point is formed across the cavity.

[0038] Both ends of the capacitor metal sheet 9 are provided with first flanged ears 10, and the second flanged ears 11 on the two first flanged ears 10 respectively form capacitors with the resonance rods 2 in the two spaced coupling cavities. The first flanged ears 10 are folded toward the upper side of the capacitor metal sheet 9, and the second flanged ears 11 are spaced at the lower side of the resonance rod disk 5, and a capacitor is formed between the second flanged ears 11 and the resonance rod disk 5.

[0039] The first flanged lug 10 is located on the side of the capacitor metal sheet 9 away from the resonance rod 2, and the second flanged lug 11 is located on the side of the first flanged lug 10 close to the resonance rod 2. This is more conducive to controlling the relative position of the second flanged lug 11 and the resonance rod 2 to prevent the second flanged lug 11 from short-circuiting with the resonance rod 2.

[0040] The capacitor metal sheet 9, the first flanged support lug 10 and the second flanged support lug 11 in this embodiment are an integrated stamping structure, which is easy to process and low in cost. The capacitor metal sheet 9 is easy to install and has reliable connection.

[0041] The filter forms a capacitor between the second flanged lug 11 and the resonant rod disk 5. By adjusting the spacing A between the second flanged lug 11 and the resonant rod disk 5, the width B and the length C of the projection of the second flanged lug 11 in the direction of the capacitor formed on the resonant rod disk 5, the capacitance strength can be adjusted. The adjustment range is large, the adjustment is convenient, and the efficiency is high. A, B, and C in this embodiment are all real numbers, ranging from 0 to 50 mm.

[0042] from Figure 7 and Figure 8 It can be seen from the comparison that the filter in this embodiment achieves frequency adjustment by adjusting the capacitance between the second flanged lug 11 and the resonant rod disk 5, and the frequency adjustment range is larger.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A coupling capacitor structure that is easy to adjust, characterized in that: The invention comprises a cavity, a resonance rod and a capacitor metal sheet, wherein the resonance rod and the capacitor metal sheet are fixed inside the cavity, an insulating support body is arranged between the capacitor metal sheet and the cavity, a first flanged ear is arranged on the capacitor metal sheet, the first flanged ear is bent toward one side of the capacitor metal sheet, and a second flanged ear is arranged at one end of the first flanged ear away from the capacitor metal sheet, the second flanged ear is bent toward one side of the first flanged ear, the second flanged ear is spaced from the resonance rod, and a capacitor is formed between the second flanged ear and the resonance rod.

2. The easily adjustable coupling capacitor structure according to claim 1, characterized in that: The first flanged ears are provided at both ends of the capacitor metal sheet, and the second flanged ears on the two first flanged ears respectively form the capacitor with the resonant rods in two spaced-apart coupling cavities.

3. The coupling capacitor structure with easy adjustment according to claim 1, characterized in that: A metal sheet fixing column is provided at the bottom of the cavity, the capacitor metal sheet is fixed on the upper side of the metal sheet fixing column, and the insulating support body is arranged between the metal sheet fixing column and the capacitor metal sheet.

4. The easily adjustable coupling capacitor structure according to claim 1 or 3, characterized in that: The upper end of the resonance rod has a resonance rod disk folded outward, and the capacitor is formed between the second flanged lug and the resonance rod disk.

5. The coupling capacitor structure with easy adjustment according to claim 4, characterized in that: The first flanged support lug is folded toward the upper side of the capacitor metal sheet, and the second flanged support lug is arranged at intervals on the lower side of the resonance rod disk.

6. The coupling capacitor structure with easy adjustment according to claim 5, characterized in that: The first flanged lug is located at a side of the capacitor metal sheet away from the resonance rod.

7. The easily adjustable coupling capacitor structure according to claim 6, characterized in that: The second flanged support ear is located on a side of the first flanged support ear close to the resonance rod.

8. The easily adjustable coupling capacitor structure according to claim 1, characterized in that: The capacitor metal sheet, the first flanged support ear and the second flanged support ear are an integrally stamped structure.

9. The easily adjustable coupling capacitor structure according to claim 1, characterized in that: A resonance rod fixing column is provided at the bottom of the cavity, and the lower end of the resonance rod is fixed to the upper side of the resonance rod fixing column by means of screws.

10. A filter, characterized in that: It includes the coupling capacitor structure as described in any one of claims 1 to 9, and a cover plate, an adjusting screw and an adjusting nut, wherein the cover plate is arranged on the opening side of the cavity, the adjusting screw is arranged on the cover plate and fixed by the adjusting nut, and one end of the adjusting screw is arranged on the inner side of the resonant rod.

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