A structure for enhancing capacitive coupling without special materials

Abstract

The present invention discloses a structure for enhancing capacitive coupling without special materials, and relates to the technical field of filter structures. The present invention includes a cavity, a tuning screw is installed on the top of the cover plate, the bottom end of the tuning screw passes through the cover plate and extends into the cavity, an input connector and an output connector are fixedly installed on the top of the cavity, the capacitor copper sheet is located at the center of the cavity, there are four coupling resonant columns, and the four coupling resonant columns are evenly distributed in the cavity, the two ends of the capacitor copper sheet are respectively facing the first resonant column and the fourth resonant column, the column wall thickness of the first resonant column and the fourth resonant column coupled with the capacitor copper sheet is thickened, and can be closer to the coupling resonant column without changing the total length, so that the harmonics and frequency of the capacitor copper sheet itself do not affect the inherent passband, reduce the risk of secondary coupling, and achieve the purpose of stronger coupling.

Description

Technical Field

[0001] The invention belongs to the technical field of filter structures, and in particular relates to a structure for enhancing capacitive coupling without special materials. Background Art

[0002] In the process of band-stop filter design and debugging, different products have different product indicators. Due to the strict requirements of some product indicators and relatively high frequencies, the total length of the capacitor copper sheet cannot be too long. If the total length is too long, it will cause the frequency and harmonics generated by the copper sheet itself to affect its own passband, thereby affecting the indicators. In previous designs, dumbbell-shaped capacitors were used to avoid the problem of the total length of the copper sheet being too long. However, this design is more sensitive and difficult to adjust. The special cost of parts processing is high, which also causes the processing cost of the product to rise.

[0003] Therefore, it is necessary to improve the deficiencies and defects of the prior art and provide a structure that enhances capacitive coupling without special materials. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a structure for enhancing capacitive coupling without special materials, which can overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a structure for enhancing capacitive coupling without special materials, including a cavity, the top of the cavity is fixed with a cover plate, the top of the cover plate is installed with a tuning screw, the bottom of the tuning screw passes through the cover plate and extends into the cavity, the top of the cavity is fixed with an input connector and an output connector, the inner cores of the input connector and the output connector are both placed in the cavity, a capacitor copper sheet and a coupling resonant column are fixedly installed in the cavity, the capacitor copper sheet is located at the center of the cavity, and the coupling resonant column There are four coupling resonant columns in total, which are evenly distributed in the cavity. The four coupling resonant columns are respectively a first resonant column, a second resonant column, a third resonant column and a fourth resonant column. An input copper sheet is fixedly mounted on the first resonant column, and the input copper sheet is offset against the inner core of the input connector. An output copper sheet is fixedly mounted on the second resonant column, and the output copper sheet is offset against the inner core of the output connector. Both ends of the capacitor copper sheet are respectively facing the first resonant column and the fourth resonant column, and the column wall thickness at the coupling point between the first resonant column and the fourth resonant column and the capacitor copper sheet is thickened.

[0006] In order to limit the position of the coupled resonant column, preferably, an isolation plate is fixedly installed in the cavity, the isolation plate divides the inner part of the cavity into four filter cavities, the four filter cavities are connected in pairs, the isolation plate isolates the two filter cavities where the first resonant column and the second resonant column are located, the four coupled resonant columns are distributed in the center of the four filter cavities, and the capacitor copper sheet is located at the center of the isolation plate.

[0007] In order to limit the position of the tuning screws, there are seven tuning screws, four of which are located directly above the four coupling resonant columns and extend into the grooves at the top of the coupling resonant columns, and the other three tuning screws are located directly above the center of the connection point of the filter cavity.

[0008] In order to fix the cover plate, further, the top end of the cavity and the top end of the isolation plate are both provided with cover plate screw holes matching with the cover plate, and the cover plate fixing screws are installed in the inner threads of the cover plate screw holes.

[0009] In order to adjust the height of the capacitor copper sheet, further, a capacitor copper sheet non-metallic support is fixedly installed at the center of the isolation plate, and the capacitor copper sheet is fixedly installed on the capacitor copper sheet non-metallic support.

[0010] In order to fix the capacitor copper sheet, further, the isolation plate, the capacitor copper sheet non-metallic support and the capacitor copper sheet are provided with matching capacitor screw holes, and the capacitor copper sheet non-metallic fixing screws are installed in the inner threads of the capacitor screw holes.

[0011] In order to fix the input copper sheet, preferably, matching input copper sheet screw holes are provided on the first resonant column and the input copper sheet, and input copper sheet fixing screws are installed in the internal threads of the input copper sheet screw holes.

[0012] In order to fix the output copper sheet, preferably, the second resonant column and the output copper sheet are provided with matching output copper sheet screw holes, and the output copper sheet fixing screws are installed in the internal threads of the output copper sheet screw holes.

[0013] In order to fix the input connector, preferably, the fixing plate portion of the input connector and the cavity are provided with matching input connector screw holes, and the input connector fixing screws are installed in the inner threads of the input connector screw holes.

[0014] In order to fix the output connector, preferably, matching output connector screw holes are provided on the fixing plate portion of the output connector and the cavity, and output connector fixing screws are installed in the inner threads of the output connector screw holes.

[0015] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art: the present invention is a structure for enhancing capacitor coupling without special materials, by increasing the size and thickness of the coupling resonance column on the side close to the capacitor copper sheet, so that the capacitor copper sheet is closer to the coupling resonance column without changing the total length, so that the harmonics and frequency of the capacitor copper sheet itself do not affect the inherent passband, reducing the risk of secondary coupling, and achieving the purpose of stronger coupling. This structure breaks the conventional design idea, has a simple structure, is easy to implement, is easy to control in size, is low in cost, and is adjustable over a large range.

[0016] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0018] In the attached picture: Figure 1 It is a schematic diagram of the external front view structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the external structure of the present invention viewed from above;

[0020] Figure 3 It is a schematic diagram of the internal structure of the present invention viewed from above;

[0021] Figure 4 It is a schematic diagram of the internal oblique structure of the present invention;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the hidden cover plate of the present invention.

[0023] In the figure: 1. cover plate; 2. cavity; 3. input connector; 4. input connector fixing screw; 5. output connector; 6. output connector fixing screw; 7. input copper sheet fixing screw; 8. input copper sheet; 9. output copper sheet fixing screw; 10. output copper sheet; 11. tuning screw; 12. cover plate fixing screw; 13. capacitor copper sheet; 14. capacitor copper sheet non-metallic fixing screw; 15. capacitor copper sheet non-metallic support; 16. coupled resonant column; 161. first resonant column; 162. second resonant column; 163. third resonant column; 164. fourth resonant column; 17. isolation plate.

[0024] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0026] Example: Refer to Figure 1-5 As shown, a structure for enhancing capacitive coupling without special materials includes a cavity 2, a cover plate 1 is fixed on the top of the cavity 2, a tuning screw 11 is installed on the top of the cover plate 1, and the bottom end of the tuning screw 11 passes through the cover plate 1 and extends into the cavity 2, an input connector 3 and an output connector 5 are fixedly installed on the top of the cavity 2, the inner cores of the input connector 3 and the output connector 5 are both placed in the cavity 2, a capacitor copper sheet 13 and a coupling resonant column 16 are fixedly installed in the cavity 2, the capacitor copper sheet 13 is located at the center of the cavity 2, and there are four coupling resonant columns 16, which are evenly distributed in the cavity In the body 2, the four coupled resonant columns 16 are respectively the first resonant column 161, the second resonant column 162, the third resonant column 163 and the fourth resonant column 164. The first resonant column 161 is fixedly mounted with an input copper sheet 8, which is against the inner core of the input connector 3. The second resonant column 162 is fixedly mounted with an output copper sheet 10, which is against the inner core of the output connector 5. The two ends of the capacitor copper sheet 13 are respectively facing the first resonant column 161 and the fourth resonant column 164, and the column wall thickness at the coupling point between the first resonant column 161 and the fourth resonant column 164 and the capacitor copper sheet 13 is thickened.

[0027] An isolation plate 17 is fixedly installed in the cavity 2. The isolation plate 17 divides the interior of the cavity 2 into four filter cavities. The four filter cavities are connected in pairs. The isolation plate 17 isolates the two filter cavities where the first resonant column 161 and the second resonant column 162 are located. The four coupled resonant columns 16 are distributed at the centers of the four filter cavities. The capacitor copper sheet 13 is located at the center of the isolation plate 17. There are seven tuning screws 11, four of which are located directly above the four coupled resonant columns 16 and extend into the grooves at the top of the coupled resonant columns 16. The other three tuning screws 11 are located directly above the center of the connection point of the filter cavity. The top of the cavity 2 and the top of the isolation plate 17 are both provided with matching cover screw holes with the cover plate 1. The cover fixing screws 12 are installed in the threads of the cover screw holes. The center of the isolation plate 17 A capacitor copper sheet non-metallic support 15 is fixedly installed, and the capacitor copper sheet 13 is fixedly installed on the capacitor copper sheet non-metallic support 15. Matching capacitor screw holes are provided on the isolation plate 17, the capacitor copper sheet non-metallic support 15 and the capacitor copper sheet 13. The capacitor copper sheet non-metallic fixing screw 14 is threadedly installed in the capacitor screw hole. The tuning screw 11 is threadedly rotated on the cover plate 1 to adjust the length of the bottom end of the tuning screw 11 penetrating into the cavity 2, and then the tuning nut is threadedly rotated on the tuning screw 11 to fix the tuning screw 11. Capacitor copper sheet non-metallic support members 15 of different thicknesses are selected to be padded under the capacitor copper sheet 13, and the height of the capacitor copper sheet 13 in the cavity 2 is adjusted. The capacitor copper sheet non-metallic fixing screw 14 is used to fix the capacitor copper sheet 13 and the capacitor copper sheet non-metallic support 15.

[0028] Matching input copper sheet screw holes are provided on the first resonant column 161 and the input copper sheet 8 . Input copper sheet fixing screws 7 are installed in the inner threads of the input copper sheet screw holes. The input copper sheet 8 is fixed by the input copper sheet fixing screws 7 .

[0029] The second resonant column 162 and the output copper sheet 10 are provided with matching output copper sheet screw holes, and the output copper sheet fixing screws 9 are installed in the inner threads of the output copper sheet screw holes, and the output copper sheet fixing screws 9 are used to fix the output copper sheet 10.

[0030] The fixing plate portion of the input connector 3 and the cavity 2 are provided with matching input connector screw holes, and the input connector fixing screws 4 are installed in the inner threads of the input connector screw holes. Four input connector fixing screws 4 are used to fix the input connector 3.

[0031] The fixing plate portion of the output connector 5 and the cavity 2 are provided with matching output connector screw holes, and the output connector fixing screws 6 are installed in the inner threads of the output connector screw holes. Four output connector fixing screws 6 are used to fix the output connector 5.

[0032] The present invention installs a capacitor copper sheet non-metallic support 15 in the cavity 2, adjusts the position height of the capacitor copper sheet 13 in the cavity 2 through the capacitor copper sheet non-metallic support 15, couples the inner core of the input connector 3 with the first resonant column 161 through the input copper sheet 8, and couples the inner core of the output connector 5 with the second resonant column 162 through the output copper sheet 10. By increasing the size thickness of the first resonant column 161 and the second resonant column 162 close to the capacitor copper sheet 13, the capacitor copper sheet 13 is closer to the coupling resonant column 16 without changing the total length, so that the harmonics and frequency of the capacitor copper sheet 13 itself do not affect the inherent passband, reduce the risk of secondary coupling, and achieve the purpose of stronger coupling.

[0033] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0034] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A structure for enhancing capacitive coupling without special materials, characterized in that: The invention comprises a cavity (2), a cover plate (1) being fixedly mounted on the top of the cavity (2), a tuning screw (11) being mounted on the top of the cover plate (1), the bottom end of the tuning screw (11) passing through the cover plate (1) and extending into the cavity (2), an input connector (3) and an output connector (5) being fixedly mounted on the top of the cavity (2), the inner cores of the input connector (3) and the output connector (5) being both in the cavity (2), a capacitor copper sheet (13) and a coupling resonant column (16) being fixedly mounted in the cavity (2), the capacitor copper sheet (13) being located at the center of the cavity (2), and a total of four coupling resonant columns (16), the four coupling resonant columns (16) being evenly distributed in the cavity (2), and the four coupling resonant columns (16) being arranged at the center of the cavity (2). The coupled resonant columns (16) are respectively a first resonant column (161), a second resonant column (162), a third resonant column (163) and a fourth resonant column (164); an input copper sheet (8) is fixedly mounted on the first resonant column (161), the input copper sheet (8) abuts against the inner core of the input connector (3); an output copper sheet (10) is fixedly mounted on the second resonant column (162), the output copper sheet (10) abuts against the inner core of the output connector (5); two ends of the capacitor copper sheet (13) face the first resonant column (161) and the fourth resonant column (164), respectively; and the column wall thickness at the coupling point between the first resonant column (161) and the fourth resonant column (164) and the capacitor copper sheet (13) is thickened; An isolation plate (17) is fixedly installed in the cavity (2), the isolation plate (17) divides the interior of the cavity (2) into four filter cavities, the four filter cavities are connected in pairs, the isolation plate (17) isolates the two filter cavities where the first resonant column (161) and the second resonant column (162) are located, the four coupled resonant columns (16) are distributed at the centers of the four filter cavities, and the capacitor copper sheet (13) is located at the center of the isolation plate (17); There are seven tuning screws (11) in total, four of which are located directly above the four coupling resonant columns (16) and extend into the grooves at the top ends of the coupling resonant columns (16), and the other three tuning screws (11) are located directly above the center of the connection point of the filter cavity; The top end of the cavity (2) and the top end of the isolation plate (17) are both provided with cover plate screw holes matching the cover plate (1), and the cover plate fixing screws (12) are installed in the inner threads of the cover plate screw holes.

2. The structure for enhancing capacitive coupling without special materials according to claim 1, characterized in that: A capacitor copper sheet non-metallic support member (15) is fixedly mounted at the center of the isolation plate (17), and the capacitor copper sheet (13) is fixedly mounted on the capacitor copper sheet non-metallic support member (15).

3. The structure for enhancing capacitive coupling without special materials according to claim 2, characterized in that: The isolation plate (17), the capacitor copper sheet non-metallic support member (15) and the capacitor copper sheet (13) are provided with matching capacitor screw holes, and the capacitor copper sheet non-metallic fixing screws (14) are installed in the inner threads of the capacitor screw holes.

4. The structure for enhancing capacitive coupling without special materials according to claim 1, characterized in that: Matching input copper sheet screw holes are provided on the first resonant column (161) and the input copper sheet (8), and input copper sheet fixing screws (7) are installed in the internal threads of the input copper sheet screw holes.

5. The structure for enhancing capacitive coupling without special materials according to claim 1, characterized in that: The second resonant column (162) and the output copper sheet (10) are provided with matching output copper sheet screw holes, and the output copper sheet fixing screws (9) are installed in the internal threads of the output copper sheet screw holes.

6. The structure for enhancing capacitive coupling without special materials according to claim 1, characterized in that: The fixing plate portion of the input connector (3) and the cavity (2) are provided with matching input connector screw holes, and the input connector fixing screws (4) are installed in the internal threads of the input connector screw holes.

7. The structure for enhancing capacitive coupling without special materials according to claim 1, characterized in that: The fixing plate portion of the output connector (5) and the cavity (2) are provided with matching output connector screw holes, and the output connector fixing screws (6) are installed in the internal threads of the output connector screw holes.

Images