A universal band-stop filter structure

Abstract

The present invention discloses a universal band-stop filter structure, belonging to the field of filters. A universal band-stop filter structure comprises a cavity, wherein two ribs are arranged in the cavity, and the two ribs divide the cavity into three chambers; the two side walls of the cavity are respectively fixedly connected with an input connector and an output connector, and the ribs are connected with a band-stop transmission copper rod, and the two ends of the band-stop transmission copper rod correspond to the input connector and the output connector respectively; each chamber is connected with a resonant column, and a fixing platform is arranged on the resonant column, and a coupling copper sheet is connected to the fixing platform, and the distance between the coupling copper sheet and the band-stop transmission copper rod is adjustable; the present invention solves the problems of the difficulty of design and debugging and the long debugging time span in the design, assembly, debugging and debugging process of the band-stop filter, and increases the characteristics of stability, consistency, reliability, operability, low cost, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of filters, and in particular to a universal band-stop filter structure. Background Art

[0002] A band-stop filter is a special filter used to block signals in a specific frequency range. It is designed to allow most frequency components to pass through the entire frequency range, while attenuating the signal in a specific frequency range (i.e., the stopband or notch band) to an extremely low level. This type of filter plays an important role in signal processing and can effectively remove or suppress unwanted frequency components.

[0003] In the design and debugging process of band-stop filters, conventional bandpass filters often cannot meet the requirements due to the relatively strict indicators, so band-stop filters are used for design. Since the bandwidth is relatively wide, the indicators are not easy to achieve, so different structures are used to achieve them. Due to structural limitations, the processing cost and production cost cannot be effectively controlled, resulting in a significant increase in cost. In view of this, the present invention is specially proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a universal band-stop filter structure.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A universal band-stop filter structure comprises a cavity, wherein two ribs are arranged in the cavity, and the two ribs divide the cavity into three chambers; The two side walls of the cavity are respectively fixedly connected with an input connector and an output connector, the rib plate is connected with a band-stop transmission copper rod, and the two ends of the band-stop transmission copper rod correspond to the input connector and the output connector respectively; A resonant column is connected in each chamber, a fixing platform is arranged on the resonant column, a coupling copper sheet is connected to the fixing platform, and the distance between the coupling copper sheet and the band-stop transmission copper rod is adjustable.

[0006] Preferably, the input connector is connected to an input fixing plate, the input fixing plate is provided with an input fixing screw, and one end of the input fixing screw passes through the input fixing plate and is threadedly connected to the outer wall of the cavity.

[0007] Furthermore, the output connector is connected to an output fixing plate, the output fixing plate is provided with an output fixing screw, and one end of the output fixing screw passes through the output fixing plate and is threadedly connected to the outer wall of the cavity.

[0008] Furthermore, circular holes are provided on both sides of the cavity, the input connector and the output connector are connected to the circular holes on both sides of the cavity, the input connector is provided with an input core rod, the output connector is provided with an output core rod, the input core rod and the output core rod respectively pass through the circular holes on both sides of the cavity and are placed in the cavity.

[0009] Furthermore, the two ends of the band-stop transmission copper rod are respectively provided with a first connecting hole and a second connecting hole, the end of the input core rod placed in the cavity is inserted into the first connecting hole, and the end of the output core rod placed in the cavity is inserted into the second connecting hole.

[0010] Furthermore, a U-shaped groove is provided on the rib plate, and a support plate is provided on the outer wall of the band-stop transmission copper rod, the support plate is arranged in the U-shaped groove, and support plates are fixedly connected on both sides of the support plate, and the support plates are respectively fitted with the outer walls on both sides of the rib plate.

[0011] Preferably, a concave hole is provided on the resonant column, a copper sheet fixing screw is threadedly connected to the fixing platform, and the coupling copper sheet is fixedly connected to the fixing platform by the copper sheet fixing screw.

[0012] Furthermore, a cover plate is provided on the cavity, a locking screw is provided on the cover plate, mounting holes are provided on the cavity and the rib plate, and the bottom of the locking screw passes through the cover plate and is threadedly connected in the mounting hole.

[0013] Furthermore, the cover plate is provided with a first tuning screw, the top thread of the first tuning screw is connected with a first tuning nut, the first tuning nut is abutted against the top outer wall of the cover plate, and a plurality of first tuning screws are provided, and the bottoms of the plurality of first tuning screws are respectively inserted into recessed holes on the plurality of resonant columns.

[0014] Preferably, a second tuning screw is also provided on the cover plate, the top of the second tuning screw is threadedly connected to a second tuning nut, the second tuning nut is abutted against the top outer wall of the cover plate, the bottom of the second tuning screw is placed in the cavity, and one end of the second tuning screw placed in the cavity is placed above the coupling copper sheet.

[0015] Compared with the prior art, the present invention provides a universal band-stop filter structure, which has the following beneficial effects: 1. In the universal band-stop filter structure, the input signal will pass through the band-stop transmission copper rod to achieve product indicators. It is easy to implement, simple in structure, and easy to control. Secondly, when in use, a hook hook or other debugging tools can be used to adjust the distance between the coupling copper sheet and the band-stop transmission copper rod to achieve different coupling values. Specifically, the hook hook can be inserted into the cavity to move the coupling copper sheet away from or close to the band-stop transmission copper rod to achieve different coupling values.

[0016] 2. The universal band-stop filter structure can fix the position of the band-stop transmission copper rod by clamping the support disc and the support plate in the U-shaped groove, thereby making its connection more stable and being more convenient to use with the coupling copper sheet.

[0017] The parts not involved in the device are the same as the existing technology or can be implemented by the existing technology. The present invention simplifies the structure of the traditional band-stop filter duplexer, and maximizes the structure of the main transmission line plus the resonant cavity according to the basic principle; this structure is simple in design, low in cost, and easy to control in batches; it solves the problems of band-stop filter in the design, assembly, debugging and debugging process due to difficulties in design and debugging, long debugging time span, etc., and increases the characteristics of stability, consistency, reliability, operability, low cost, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a general band-stop filter structure proposed by the present invention Figure 1 ; Figure 2 A schematic diagram of a general band-stop filter structure proposed by the present invention Figure 2 ; Figure 3 This is a schematic structural diagram of a universal band-stop filter structure without a cover plate proposed by the present invention; Figure 4 A cross-sectional schematic diagram of a universal band-stop filter structure proposed by the present invention; Figure 5 A schematic cross-sectional view of a general band-stop filter structure proposed by the present invention; Figure 6 A cross-sectional schematic diagram of a general band-stop filter structure provided by the present invention; Figure 7 A schematic diagram of the structure of a band-stop transmission copper rod in a universal band-stop filter structure proposed by the present invention; Figure 8 A universal band-stop filter structure proposed by the present invention Figure 4 A magnified view of part A; Fig. 9 A universal band-stop filter structure proposed by the present invention Figure 4 Magnified view of part B.

[0019] In the figure: 1. cavity; 101. cover plate; 102. locking screw; 103. first tuning screw; 104. first tuning nut; 105. second tuning screw; 106. second tuning nut; 107. mounting hole; 108. round hole; 2. input connector; 201. input fixing plate; 202. input fixing screw; 203. input core rod; 3. output connector; 301. output fixing plate; 302. output fixing screw; 303. output core rod; 4. rib plate; 401. U-shaped groove; 402. resonant column; 403. concave hole; 404. fixing platform; 405. coupling copper sheet; 406. copper sheet fixing screw; 5. band-stop transmission copper rod; 501. support plate; 502. support plate; 503. first connecting hole; 504. second connecting hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Example

[0022] Reference Figure 1-Figure 9 A universal band-stop filter structure comprises a cavity 1, characterized in that two ribs 4 are arranged in the cavity 1, and the two ribs 4 divide the cavity 1 into three chambers; the two side walls of the cavity 1 are respectively fixedly connected with an input connector 2 and an output connector 3, and the ribs 4 are connected with a band-stop transmission copper rod 5, and the two ends of the band-stop transmission copper rod 5 correspond to the input connector 2 and the output connector 3 respectively; a resonant column 402 is connected in each chamber, and a fixing platform 404 is arranged on the resonant column 402, and a coupling copper sheet 405 is connected to the fixing platform 404, and the distance between the coupling copper sheet 405 and the band-stop transmission copper rod 5 is adjustable.

[0023] In this embodiment, when in use, the input connector 2 arranged on the outer wall of the cavity 1 can receive and input the signal, and the input signal will pass through the band-stop transmission copper rod 5, so as to achieve the product index. It is easy to implement, simple in structure, and easy to control. Secondly, when in use, a hook hook or other debugging tools can be used to adjust the distance between the coupling copper sheet 405 and the band-stop transmission copper rod 5, so as to achieve different coupling values. Specifically, the hook hook can be inserted into the cavity 1 to move the coupling copper sheet 405 away from or close to the band-stop transmission copper rod 5 to achieve different coupling values; then the signal will be output through the output connector 3 to proceed to the next step.

[0024] Specifically, through the setting of the rib plate 4, the cavity 1 can be divided into multiple cavities, so that different coupling values ​​can be achieved in each cavity, which is more convenient for debugging and use. The set resonant column 402 can determine the resonant frequency of the filter, so that the filter can adapt to different operating frequency requirements and improve the flexibility and applicability of the filter. The fixed platform 404 is set to facilitate the connection and installation of the coupling copper sheet 405, and through the setting of the rib plate 4, the cavity 1 can be divided into three chambers, and the resonant column 402 is set in each chamber to further enhance the effect of use. Example

[0025] Reference Figure 1-Figure 9 A universal band-stop filter structure comprises a cavity 1, characterized in that two ribs 4 are arranged in the cavity 1, and the two ribs 4 divide the cavity 1 into three chambers; the two side walls of the cavity 1 are respectively fixedly connected with an input connector 2 and an output connector 3, and the ribs 4 are connected with a band-stop transmission copper rod 5, and the two ends of the band-stop transmission copper rod 5 correspond to the input connector 2 and the output connector 3 respectively; a resonant column 402 is connected in each chamber, and a fixing platform 404 is arranged on the resonant column 402, and a coupling copper sheet 405 is connected to the fixing platform 404, and the distance between the coupling copper sheet 405 and the band-stop transmission copper rod 5 is adjustable; further, an input fixing plate 201 is connected to the input connector 2, and an input fixing screw 202 is arranged on the input fixing plate 201, and the input fixing screw 202 passes through one end of the input fixing plate 201 and is threadedly connected to the outer wall of the cavity 1.

[0026] The output connector 3 is connected to an output fixing plate 301 , and the output fixing plate 301 is provided with an output fixing screw 302 . The output fixing screw 302 passes through one end of the output fixing plate 301 and is threadedly connected to the outer wall of the cavity 1 .

[0027] In this embodiment, before use, the input fixing plate 201 is firstly affixed to the outer wall of one side of the cavity 1, and then the input fixing plate 201 is fixedly connected to the cavity 1 by the input fixing screws 202, thereby completing the installation of the input connector 2, and then the output fixing plate 301 is affixed to the outer wall on the other side of the cavity 1, and the input fixing plate 301 is fixedly installed on the outer wall on the other side of the cavity 1 by the output fixing screws 302, thereby completing the installation of the output connector 3. The input fixing screws 202 and the output fixing screws 302 are provided to make the input connector 2 and the output connector 3 easier to install and disassemble. The input connector 2 can receive an external input signal and feed it into the cavity 1 of the filter for processing. The signal processed by the filter can be exported through the output connector 3 for subsequent use.

[0028] Circular holes 108 are provided on both sides of the cavity 1, and the input connector 2 and the output connector 3 are connected to the circular holes 108 on both sides of the cavity 1. The input connector 2 is provided with an input core rod 203, and the output connector 3 is provided with an output core rod 303. The input core rod 203 and the output core rod 303 respectively pass through the circular holes 108 on both sides of the cavity 1 and are placed in the cavity 1.

[0029] The two ends of the band-stop transmission copper rod 5 are respectively provided with a first connecting hole 503 and a second connecting hole 504 . The end of the input core rod 203 placed in the cavity 1 is plugged into the first connecting hole 503 , and the end of the output core rod 303 placed in the cavity 1 is plugged into the second connecting hole 504 .

[0030] In this embodiment, the circular hole 108 is provided to facilitate the installation and fixation of the input connector 2 and the output connector 3. When in use, the input core rod 203 is inserted into the first connecting hole 503 on the left side of the band-stop transmission copper rod 5, and the output core rod 303 is inserted into the second connecting hole 504 on the band-stop transmission copper rod 5. The input core rod 203 and the output core rod 303 can be connected to the band-stop transmission copper rod 5, which is convenient for signal transmission, thereby ensuring the normal use of the filter.

[0031] A U-shaped groove 401 is provided on the rib plate 4, and a support plate 501 is provided on the outer wall of the band-stop transmission copper rod 5. The support plate 501 is arranged in the U-shaped groove 401, and support plates 502 are fixedly connected to both sides of the support plate 501, and the support plates 502 are respectively fitted with the outer walls of both sides of the rib plate 4.

[0032] By clamping the support disc 501 and the support plate 502 in the U-shaped groove 401 , the position of the band-stop transmission copper rod 5 can be fixed, so that its connection is more stable and can be more conveniently used in conjunction with the coupling copper sheet 405 . Example

[0033] Reference Figure 1-Figure 9A universal band-stop filter structure comprises a cavity 1, characterized in that two ribs 4 are arranged in the cavity 1, and the two ribs 4 divide the cavity 1 into three chambers; the two side walls of the cavity 1 are respectively fixedly connected with an input connector 2 and an output connector 3, and the ribs 4 are connected with a band-stop transmission copper rod 5, and the two ends of the band-stop transmission copper rod 5 correspond to the input connector 2 and the output connector 3 respectively; a resonant column 402 is connected in each chamber, and a fixing platform 404 is arranged on the resonant column 402, and a coupling copper sheet 405 is connected to the fixing platform 404, and the distance between the coupling copper sheet 405 and the band-stop transmission copper rod 5 is adjustable; further, a concave hole 403 is arranged on the resonant column 402, and a copper sheet fixing screw 406 is threadedly connected to the fixing platform 404, and the coupling copper sheet 405 is fixedly connected to the fixing platform 404 through the copper sheet fixing screw 406.

[0034] In this embodiment, the fixing platform 404 can facilitate the placement of the coupling copper sheet 405, and the copper sheet fixing screws 406 can fix the adjusted coupling copper sheet 405, thereby preventing the coupling copper sheet 405 from shaking or falling off during use, which would affect the use effect.

[0035] The cavity 1 is provided with a cover plate 101 , and the cover plate 101 is provided with a locking screw 102 . The cavity 1 and the rib plate 4 are both provided with mounting holes 107 . The bottom of the locking screw 102 passes through the cover plate 101 and is threadedly connected in the mounting hole 107 .

[0036] The cover plate 101 is placed on the cavity 1 and then fixed by means of locking screws 102, so that the connection of the cover plate 101 can be more stable, the sealing of the filter cavity 1 can be achieved, and the transmission effect can be ensured. The rib plate 4 is also provided with mounting holes 107 and locking screws 102, which can achieve a better fixing effect.

[0037] A first tuning screw 103 is provided on the cover plate 101, and a first tuning nut 104 is threadedly connected to the top of the first tuning screw 103. The first tuning nut 104 is abutted against the top outer wall of the cover plate 101. A plurality of first tuning screws 103 are provided, and the bottoms of the plurality of first tuning screws 103 are respectively inserted into the recessed holes 403 on the plurality of resonant columns 402.

[0038] By setting the resonant column 402, resonance of a specific frequency can be achieved, and energy can be stored and released at the resonant frequency. A first tuning screw 103 is provided on the cover 101. Specifically, by adjusting the position of the first tuning screw 103 on the cover 101, the depth of the bottom of the first tuning screw 103 extending into the recessed hole 403 on the resonant column 402 can be adjusted, and then fixed by the first tuning nut 104. The depth of the first tuning screw 103 inserted into the recessed hole 403 can be adjusted, and the resonant frequency of the filter can be fine-tuned; by changing the insertion depth of the resonant rod, the frequency response of the filter can be accurately controlled, and the input and output impedances of the filter can also be affected, thereby optimizing the performance of the filter.

[0039] During actual use, changes in the insertion depth of the first tuning screw 103 will change the effective length of the resonant column 402, thereby adjusting the resonant frequency of the filter; the deeper the insertion, the lower the resonant frequency; the shallower the insertion, the higher the resonant frequency; when the insertion depth is moderate, the bandwidth is narrow and the frequency selectivity is better; when the insertion depth is too deep or too shallow, the bandwidth may become wider and the frequency selectivity decreases.

[0040] A second tuning screw 105 is also provided on the cover plate 101. The top of the second tuning screw 105 is threadedly connected to a second tuning nut 106. The second tuning nut 106 abuts against the top outer wall of the cover plate 101. The bottom of the second tuning screw 105 is placed in the cavity 1, and one end of the second tuning screw 105 placed in the cavity 1 is placed above the coupling copper sheet 405.

[0041] The impedance characteristics of the filter are affected by the second tuning screw 105, and the depth of the second tuning screw 105 inserted into the cavity 1 can be adjusted. After the adjustment, it is fixed by the second tuning nut 106, so that the position of the second tuning screw 105 is fixed, and the second tuning screw 105 is located above the coupling copper sheet 405, which can more accurately adjust the frequency response of the filter; by fine-tuning the position of the second tuning screw 105, the precise control of the resonant frequency of the filter can be achieved; the coupling copper sheet 405 is usually used to adjust the coupling strength between the filter cavities 1; the second tuning screw 105 is located above the coupling copper sheet 405, which can further optimize the coupling effect and provide more flexible tuning options, and this layout makes the second tuning screw 105 and the coupling copper sheet 405 more compact in space, which helps to realize a miniaturized filter design.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A universal band-stop filter structure, comprising a cavity (1), characterized in that: Two ribs (4) are provided in the cavity (1), and the two ribs (4) divide the cavity (1) into three chambers; The two side walls of the cavity (1) are respectively fixedly connected with an input connector (2) and an output connector (3); the rib plate (4) is connected with a band-stop transmission copper rod (5); and the two ends of the band-stop transmission copper rod (5) respectively correspond to the input connector (2) and the output connector (3); Each chamber is connected to a resonant column (402), a fixing platform (404) is provided on the resonant column (402), a coupling copper sheet (405) is connected to the fixing platform (404), and the distance between the coupling copper sheet (405) and the band-stop transmission copper rod (5) is adjustable.

2. A universal band-stop filter structure according to claim 1, characterized in that: The input connector (2) is connected to an input fixing plate (201), the input fixing plate (201) is provided with an input fixing screw (202), and one end of the input fixing screw (202) passes through the input fixing plate (201) and is threadedly connected to the outer wall of the cavity (1).

3. A universal band-stop filter structure according to claim 2, characterized in that: The output connector (3) is connected to an output fixing plate (301), and the output fixing plate (301) is provided with an output fixing screw (302), and one end of the output fixing screw (302) passes through the output fixing plate (301) and is threadedly connected to the outer wall of the cavity (1).

4. A universal band-stop filter structure according to claim 3, characterized in that: Circular holes (108) are provided on both sides of the cavity (1); the input connector (2) and the output connector (3) are connected to the circular holes (108) on both sides of the cavity (1); an input core rod (203) is provided on the input connector (2); an output core rod (303) is provided on the output connector (3); the input core rod (203) and the output core rod (303) respectively pass through the circular holes (108) on both sides of the cavity (1) and are placed in the cavity (1).

5. A universal band-stop filter structure according to claim 4, characterized in that: A first connection hole (503) and a second connection hole (504) are respectively provided at both ends of the band-stop transmission copper rod (5); one end of the input core rod (203) placed in the cavity (1) is plugged into the first connection hole (503); and one end of the output core rod (303) placed in the cavity (1) is plugged into the second connection hole (504).

6. A universal band-stop filter structure according to claim 5, characterized in that: The rib plate (4) is provided with a U-shaped groove (401), and the outer wall of the band-stop transmission copper rod (5) is provided with a support plate (501), the support plate (501) is arranged in the U-shaped groove (401), and both sides of the support plate (501) are fixedly connected with support plates (502), and the support plates (502) are respectively fitted with the outer walls of both sides of the rib plate (4).

7. A universal band-stop filter structure according to claim 1, characterized in that: The resonant column (402) is provided with a concave hole (403), the fixing platform (404) is threadedly connected with a copper sheet fixing screw (406), and the coupling copper sheet (405) is fixedly connected to the fixing platform (404) via the copper sheet fixing screw (406).

8. A universal band-stop filter structure according to claim 7, characterized in that: The cavity (1) is provided with a cover plate (101), the cover plate (101) is provided with a locking screw (102), the cavity (1) and the rib plate (4) are both provided with mounting holes (107), the bottom of the locking screw (102) passes through the cover plate (101) and is threadedly connected in the mounting hole (107).

9. A universal band-stop filter structure according to claim 8, characterized in that: The cover plate (101) is provided with a first tuning screw (103), the top of the first tuning screw (103) is threadedly connected to a first tuning nut (104), the first tuning nut (104) abuts against the top outer wall of the cover plate (101), a plurality of first tuning screws (103) are provided, and the bottoms of the plurality of first tuning screws (103) are respectively inserted into the concave holes (403) on the plurality of resonant columns (402).

10. A universal band-stop filter structure according to claim 1, characterized in that: The cover plate (101) is also provided with a second tuning screw (105); the top of the second tuning screw (105) is threadedly connected to a second tuning nut (106); the second tuning nut (106) abuts against the top outer wall of the cover plate (101); the bottom of the second tuning screw (105) is placed in the cavity (1); and one end of the second tuning screw (105) placed in the cavity (1) is placed above the coupling copper sheet (405).

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