A window coupling structure for enhancing duplexer filter

Abstract

The invention discloses a window coupling structure of an enhanced duplexer filter, belonging to the field of filters. A window coupling structure of an enhanced duplexer filter comprises a cavity, and also comprises an input connector and an output connector respectively arranged on both sides of the cavity; two resonant columns are fixedly connected in the cavity, and a coupling copper sheet is arranged between the two resonant columns; an input core rod is arranged on the input connector, and an input round head coupling gasket is arranged on the side of the input core rod placed in the cavity; an output core rod is arranged on the output connector, and an output round head coupling gasket is arranged on the side of the output core rod placed in the cavity; a cover plate is arranged on the side of the cavity, and a tuning rod is arranged on the cover plate; the invention can have a super strong window coupling value, can meet the different width requirements of customers, greatly improve time, material types, warehouse management, processing costs, labor costs, and processing production efficiency, can reduce costs, and increase profits.

Description

Technical Field

[0001] The present invention relates to the technical field of filters, and in particular to a window coupling structure of an enhanced duplexer filter. Background Art

[0002] Duplexers and filters are two commonly used components in RF and communication systems. They each have different functions, but often work closely together in practical applications. Duplexers and filters each play an important role in communication systems, optimizing signal processing and transmission through different methods and functions; in high-frequency applications, they are often used in combination to achieve efficient signal transmission and processing.

[0003] In the field of filter duplexers, there is often a demand for products with ultra-wide passbands. Since the passband of the product is relatively wide (the passband width is determined by the coupling value between the resonant cavities and the coupling strength value of the input and output), the product must be simulated, processed, debugged, tested and many other steps must be performed according to the passband width to meet customer needs during design. Since the product passband is relatively wide, the coupling value requirement for the window is relatively wide, which is generally achieved by connecting a reinforcing rib between the two resonant cavities. However, for products with wider passbands, it is difficult to achieve the ultra-strong coupling value requirement because the reinforcing rib is connected to the bottom of the cavity. 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 window coupling structure for enhancing a duplexer filter.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A window coupling structure for enhancing a duplexer filter includes a cavity and further includes: An input connector and an output connector are respectively arranged on both sides of the cavity; Two resonant columns are fixedly connected in the cavity, and a coupling copper sheet is arranged between the two resonant columns; An input core rod is arranged on the input joint, and an input round head coupling gasket is arranged on one side of the input core rod placed in the cavity; An output core rod is arranged on the output joint, and an output round head coupling gasket is arranged on one side of the output core rod placed in the cavity; The cover plate is arranged on the side of the cavity, and a tuning rod is arranged on the cover plate.

[0006] Preferably, two ends of the coupling copper sheet are respectively welded on two resonant columns.

[0007] Preferably, a card slot is provided on the outer wall of the two resonant columns, a fixing block is fixedly connected to the coupling copper sheet, a card block is slidably connected inside the fixing block, and the card block is inserted into the card slot.

[0008] Furthermore, a sliding block is provided at one end of the clamping block placed in the fixed block, the sliding block is slidably connected in the fixed block, and a spring is provided between the sliding block and the inner wall of the fixed block.

[0009] Furthermore, the card slots are provided in plurality and are distributed linearly, and the plurality of card slots and the card blocks are provided with matching inclined surfaces.

[0010] Preferably, the cover plate and the cavity are both provided with corresponding threaded holes, a locking screw is connected in the threaded hole, a tuning nut is provided on the tuning rod, and the tuning nut abuts against the outer wall of the cover plate.

[0011] Furthermore, three tuning rods are provided, and the three tuning rods are all located on the same horizontal plane. A resonant cavity is provided on the resonant column. The tuning rods located on both sides have one end placed in the cavity and are respectively inserted into the resonant cavities on the two resonant columns, and the tuning rod located in the middle has one end placed in the cavity and is arranged between the two resonant columns.

[0012] Furthermore, a fixing platform is provided on the inner wall of the cavity, mounting holes are provided on the fixing platform and the cavity, a resonance screw is provided in the resonance column, and the resonance screw passes through the resonance column and is threadedly connected in the mounting hole.

[0013] Preferably, an input fixing plate is provided on the input connector, an input fixing screw is provided on the input fixing plate, one end of the input fixing screw passes through the input fixing plate and is threadedly connected to the cavity, and an input coupling fixing screw is connected between the input round head coupling gasket and the input core rod.

[0014] Preferably, an output fixing plate is provided on the output connector, an output fixing screw is provided on the output fixing plate, one end of the output fixing screw passes through the output fixing plate and is threadedly connected to the cavity, and an output coupling fixing screw is connected between the output round head coupling gasket and the output core rod.

[0015] Compared with the prior art, the present invention provides a window coupling structure for enhancing a duplexer filter, which has the following beneficial effects: 1. The window coupling structure of the enhanced duplexer filter can enhance the signal at its resonant frequency by setting two resonant columns. A coupling copper sheet is provided between the two resonant columns, so that the original reinforcing rib design can be changed to a coupling copper sheet suspended between the two resonant cavities to achieve a super strong window coupling value, thereby meeting the different width requirements of customers, greatly improving time, material types, warehouse management, processing costs, labor costs, and processing production efficiency, thereby reducing costs and increasing profits.

[0016] 2. The window coupling structure of the enhanced duplexer filter has two coupling copper sheets: welding and adjustment. The welding method makes the connection between the coupling copper sheet and the resonant column more secure, improves the structural stability of the filter, and helps to extend its service life. By adjusting the position of the coupling copper sheet, the coupling strength between the two resonant columns can be accurately controlled, thereby optimizing the performance of the filter and meeting different application requirements. The position-adjustable design makes it easier to adjust the coupling effect during filter debugging or maintenance, thereby improving the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A structural schematic diagram of a window coupling structure of an enhanced duplexer filter proposed by the present invention; Figure 2 This is a structural schematic diagram of a window coupling structure of an enhanced duplexer filter proposed by the present invention without a cover plate; Figure 3 It is a structural schematic diagram of the back side of a window coupling structure of an enhanced duplexer filter proposed by the present invention; Figure 4 A schematic structural diagram of a cross-sectional view of a window coupling structure of an enhanced duplexer filter proposed by the present invention; Figure 5 A cross-sectional view of a window coupling structure of an enhanced duplexer filter proposed by the present invention from top view Figure 1 ; Figure 6 A schematic diagram of the structure of a resonant column and a coupling copper sheet in a window coupling structure of an enhanced duplexer filter proposed by the present invention; Figure 7 A cross-sectional view of a window coupling structure of an enhanced duplexer filter proposed by the present invention from top view Figure 2 ; Figure 8 A window coupling structure of an enhanced duplexer filter proposed by the present invention Figure 7 Enlarged view of part A.

[0018] In the figure: 1. cavity; 101. cover plate; 102. locking screw; 103. threaded hole; 104. mounting hole; 105. fixing platform; 2. input connector; 201. input fixing plate; 202. input fixing screw; 203. input core rod; 204. input round head coupling gasket; 205. input coupling fixing screw; 3. output connector; 301. output fixing plate; 302. output fixing screw; 303. output core rod; 304. output round head coupling gasket; 305. output coupling fixing screw; 4. resonant column; 401. resonant cavity; 402. coupling copper sheet; 403. resonant screw; 404. slot; 405. fixing block; 406. slider; 407. block; 408. spring; 5. tuning rod; 501. tuning nut. DETAILED DESCRIPTION

[0019] 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.

[0020] 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., indicating the orientation or position relationship are based on the orientation or position relationship shown in the 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

[0021] Reference Figure 1-Figure 6 A window coupling structure of an enhanced duplexer filter includes a cavity 1, and also includes an input connector 2 and an output connector 3 respectively arranged on both sides of the cavity 1, two resonant columns 4 are fixedly connected in the cavity 1, and a coupling copper sheet 402 is arranged between the two resonant columns 4; an input core rod 203 is arranged on the input connector 2, and an input round head coupling gasket 204 is arranged on the side where the input core rod 203 is placed in the cavity 1; an output core rod 303 is arranged on the output connector 3, and an output round head coupling gasket 304 is arranged on the side where the output core rod 303 is placed in the cavity 1, a cover plate 101 is arranged on the side of the cavity 1, and a tuning rod 5 is arranged on the cover plate 101.

[0022] In this embodiment, when in use, first, the input connector 2 and the output connector 3 are fixedly connected on both sides of the cavity 1. The input connector 2 can input the signal. When the signal needs to be output, the signal can be output through the output connector 3, thereby completing the filtering operation. When in use, the cover plate 101 is fixedly installed on the side of the cavity 1, which can ensure the sealing inside the cavity 1, thereby ensuring the stable transmission of the filtered signal, and the cover plate 101 is easy to disassemble, which can facilitate the debugging and maintenance of the structure inside the cavity 1. In this application, by setting two resonant columns 4, the signal can be enhanced at its resonant frequency, and a coupling copper sheet 402 is provided between the two resonant columns 4, so that the original reinforcing rib design can be changed to a coupling copper sheet 402 suspended between the two resonant cavities 401 to achieve a super strong window coupling value, thereby meeting the products with different width requirements of customers, and greatly improving time, material types, warehouse management, processing costs, labor costs, and processing production efficiency, thereby reducing costs and increasing profits. Example

[0023] Reference Figure 1-Figure 6 A window coupling structure of an enhanced duplexer filter includes a cavity 1, and also includes an input connector 2 and an output connector 3 respectively arranged on both sides of the cavity 1, two resonant columns 4 are fixedly connected in the cavity 1, and a coupling copper sheet 402 is arranged between the two resonant columns 4; an input core rod 203 is arranged on the input connector 2, and an input round head coupling gasket 204 is arranged on the side where the input core rod 203 is placed in the cavity 1; an output core rod 303 is arranged on the output connector 3, and an output round head coupling gasket 304 is arranged on the side where the output core rod 303 is placed in the cavity 1, a cover plate 101 is arranged on the side of the cavity 1, and a tuning rod 5 is arranged on the cover plate 101.

[0024] Two ends of the coupling copper sheet 402 are respectively welded on the two resonant columns 4 .

[0025] In the present application, the coupling copper sheet 402 is welded on the two resonant columns 4. The welding method makes the connection between the coupling copper sheet 402 and the resonant column 4 more secure, improves the structural stability of the filter, and helps to extend its service life. The coupling copper sheet 402 serves as a bridge connecting the resonant columns 4, which helps to enhance the transmission efficiency of the signal between the two resonant columns 4 and improve the overall performance of the filter. A coupling copper sheet 402 is welded between the outsides of the two resonant columns 4 through a positioning fixture, and the original design of the reinforcement ribs can be changed to a reinforced coupling copper sheet 402 suspended between the two resonant cavities 401 to achieve a super strong window coupling value, thereby meeting the different width requirements of customers. The time, material types, warehouse management, processing costs, labor costs, and processing production efficiency are greatly improved, thereby reducing costs and increasing profits. Example

[0026] Reference Figure 1-Figure 3 , Figure 7 and Figure 8 A window coupling structure of an enhanced duplexer filter includes a cavity 1, and also includes an input connector 2 and an output connector 3 respectively arranged on both sides of the cavity 1, two resonant columns 4 are fixedly connected in the cavity 1, and a coupling copper sheet 402 is arranged between the two resonant columns 4; an input core rod 203 is arranged on the input connector 2, and an input round head coupling gasket 204 is arranged on the side where the input core rod 203 is placed in the cavity 1; an output core rod 303 is arranged on the output connector 3, and an output round head coupling gasket 304 is arranged on the side where the output core rod 303 is placed in the cavity 1, a cover plate 101 is arranged on the side of the cavity 1, and a tuning rod 5 is arranged on the cover plate 101.

[0027] The outer walls of the two resonant columns 4 are both provided with a slot 404 , a fixing block 405 is fixedly connected to the coupling copper sheet 402 , a fixing block 407 is slidably connected inside the fixing block 405 , and the fixing block 407 is inserted into the slot 404 .

[0028] One end of the clamping block 407 placed in the fixed block 405 is provided with a sliding block 406 , the sliding block 406 is slidably connected in the fixed block 405 , and a spring 408 is provided between the sliding block 406 and the inner wall of the fixed block 405 .

[0029] The card slots 404 are provided with a plurality of linearly distributed ones, and the plurality of card slots 404 and the card block 407 are provided with matching inclined surfaces.

[0030] In this embodiment, when in use, the card blocks 407 at both ends of the coupling copper sheet 402 can be directly inserted into the card slot 404, so that under the action of the spring 408, the card block 407 can be tightly pressed against the inner wall of the card slot 404, thereby achieving the fixing effect of the coupling copper sheet 402. When the position of the coupling copper sheet 402 needs to be adjusted, the coupling copper sheet 402 is pulled by the end with the inclined surface on the card slot 404. Since the card block 407 and the card slot 404 are both provided with corresponding inclined surfaces, when the coupling copper sheet 402 is pulled to move, the card block 407 can be driven to move along the inclined surface of the card slot 404, so that the card block 407 moves into the fixed block 405, and the spring 408 is compressed at the same time, and then the coupling copper sheet 402 can be pulled out of the card slot 404, and then the coupling copper sheet 402 can be installed again at the position that needs to be adjusted. During installation, first insert the card block 407 at one end into the card slot 404, and squeeze the card block 407 at the other end into the card slot 404 on the other resonant column 4, and under the action of the spring 408, the card block 407 can be tightly pressed against the card slot 404 without falling off. By adjusting the position of the coupling copper sheet 402, the coupling strength between the two resonant columns 4 can be accurately controlled, thereby optimizing the performance of the filter and meeting different application requirements. The position-adjustable design makes it easier to adjust the coupling effect during filter debugging or maintenance, thereby improving the convenience of use, and by installing the coupling copper sheet 402 between the two resonant columns 4, it can greatly improve time, material types, warehouse management, processing costs, labor costs, and processing production efficiency, thereby reducing costs and increasing profits. Example

[0031] Reference Figure 1-Figure 6 A window coupling structure of an enhanced duplexer filter includes a cavity 1, and also includes an input connector 2 and an output connector 3 respectively arranged on both sides of the cavity 1, two resonant columns 4 are fixedly connected in the cavity 1, and a coupling copper sheet 402 is arranged between the two resonant columns 4; an input core rod 203 is arranged on the input connector 2, and an input round head coupling gasket 204 is arranged on the side where the input core rod 203 is placed in the cavity 1; an output core rod 303 is arranged on the output connector 3, and an output round head coupling gasket 304 is arranged on the side where the output core rod 303 is placed in the cavity 1, a cover plate 101 is arranged on the side of the cavity 1, and a tuning rod 5 is arranged on the cover plate 101.

[0032] The cover plate 101 and the cavity 1 are both provided with corresponding threaded holes 103 , a locking screw 102 is connected in the threaded hole 103 , a tuning nut 501 is provided on the tuning rod 5 , and the tuning nut 501 abuts against the outer wall of the cover plate 101 .

[0033] There are three tuning rods 5, and the three tuning rods 5 are all located on the same horizontal plane. A resonance cavity 401 is provided on the resonance column 4. The tuning rods 5 located on both sides have one end placed in the cavity 1 and are respectively inserted into the resonance cavities 401 on the two resonance columns 4. The tuning rod 5 located in the middle has one end placed in the cavity 1 and is arranged between the two resonance columns 4.

[0034] In this embodiment, the function of the tuning rod 5 is to change the signal frequency characteristics; the position and depth of the tuning rod 5 in the resonance cavity 401 can be adjusted by setting the tuning nut 501. After tightening the tuning nut 501, the position of the tuning rod 5 can be fixed, which can change the center operating frequency of the filter to make it work better. The two tuning rods 5 on both sides are inserted into the resonance cavity 401, and the middle tuning rod 5 is placed between the two resonance columns 4. This design can enhance the electromagnetic coupling between the resonance cavities 401 and provide a larger coupling tuning range. It helps to more easily achieve ultra-wideband filtering and brings convenience to the design of the filter and the layout of the resonance cavity 401. A fixing platform 105 is provided on the inner wall of the cavity 1 , and mounting holes 104 are provided on the fixing platform 105 and the cavity 1 . A resonance screw 403 is provided in the resonance column 4 , and the resonance screw 403 passes through the resonance column 4 and is threadedly connected in the mounting hole 104 .

[0035] In this embodiment, during installation, the resonant column 4 is placed on the fixing platform 105, and then the resonant column 4 is threadedly connected to the mounting hole 104 on the fixing platform 105 through the resonant screw 403, thereby fixing the resonant column 4 to facilitate subsequent work, and the mounting hole 104 is set to facilitate the installation and placement of the resonant screw 403. Example

[0036] Reference Figure 1-Figure 6 A window coupling structure of an enhanced duplexer filter comprises a cavity 1, and also comprises an input connector 2 and an output connector 3 respectively arranged on both sides of the cavity 1, two resonant columns 4 are fixedly connected in the cavity 1, and a coupling copper sheet 402 is arranged between the two resonant columns 4; an input core rod 203 is arranged on the input connector 2, and an input round head coupling gasket 204 is arranged on the side of the input core rod 203 placed in the cavity 1; an output core rod 303 is arranged on the output connector 3, and an output round head coupling gasket 304 is arranged on the side of the output core rod 303 placed in the cavity 1, a cover plate 101 is arranged on the side of the cavity 1, and a tuning rod 5 is arranged on the cover plate 101; an input fixing plate 201 is arranged on the input connector 2, an input fixing screw 202 is arranged on the input fixing plate 201, the input fixing screw 202 passes through one end of the input fixing plate 201 and is threadedly connected to the cavity 1, and an input coupling fixing screw 205 is connected between the input round head coupling gasket 204 and the input core rod 203.

[0037] The output connector 3 is provided with 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 cavity 1 . An output coupling fixing screw 305 is connected between the output round head coupling gasket 304 and the output core rod 303 .

[0038] In this embodiment, the input round head coupling gasket 204 and the output round head coupling gasket 304 are part of the filter, and their pins are connected to the input and output ends of the circuit to play the role of transmitting signals; it can merge the signals of multiple signal sources together for further processing, such as filtering, gain control, etc., and the input round head coupling gasket 204 can be fixedly connected to the input core rod 203 by the provided input coupling fixing screw 205, and the output round head coupling gasket 304 can be fixedly connected to the output core rod 303 by the provided output coupling fixing screw 305; during installation, the input fixing plate 201 is firstly fitted to the outer wall of the cavity 1, and then fixed by the input fixing screw 202 to make the connection more stable, and then the output fixing plate 301 is fitted to the outer wall of the other side of the cavity 1, and fixed by the output fixing screw 302, so that the output connector 3 is installed more stably, and the input connector 2 and the output connector 3 can facilitate the input and output of signals.

[0039] 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 window coupling structure for an enhanced duplexer filter, comprising a cavity (1), characterized in that: Also includes: An input connector (2) and an output connector (3) respectively arranged on both sides of the cavity (1); Two resonant columns (4) are both fixedly connected in the cavity (1), and a coupling copper sheet (402) is provided between the two resonant columns (4); An input core rod (203) is arranged on the input connector (2), and an input round head coupling gasket (204) is provided on one side of the input core rod (203) placed in the cavity (1); An output core rod (303) is arranged on the output connector (3), and an output round head coupling gasket (304) is provided on one side of the output core rod (303) placed in the cavity (1); A cover plate (101) is arranged on a side surface of the cavity (1), and a tuning rod (5) is provided on the cover plate (101).

2. The window coupling structure of the enhanced duplexer filter according to claim 1, characterized in that: The two ends of the coupling copper sheet (402) are respectively welded on two resonant columns (4).

3. The window coupling structure of the enhanced duplexer filter according to claim 1, characterized in that: A card slot (404) is provided on the outer wall of the two resonant columns (4); a fixing block (405) is fixedly connected to the coupling copper sheet (402); a card block (407) is slidably connected inside the fixing block (405); and the card block (407) is plugged into the card slot (404).

4. The window coupling structure of the enhanced duplexer filter according to claim 3, characterized in that: A slider (406) is provided at one end of the clamping block (407) placed in the fixed block (405). The slider (406) is slidably connected in the fixed block (405). A spring (408) is provided between the slider (406) and the inner wall of the fixed block (405).

5. The window coupling structure of the enhanced duplexer filter according to claim 4, characterized in that: The card slots (404) are provided with a plurality of linearly distributed ones, and the plurality of card slots (404) and the card block (407) are both provided with matching inclined surfaces.

6. A window coupling structure for enhancing a duplexer filter according to claim 2 or 5, characterized in that: The cover plate (101) and the cavity (1) are both provided with corresponding threaded holes (103), a locking screw (102) is connected inside the threaded hole (103), a tuning nut (501) is provided on the tuning rod (5), and the tuning nut (501) abuts against the outer wall of the cover plate (101).

7. The window coupling structure of the enhanced duplexer filter according to claim 6, characterized in that: Three tuning rods (5) are provided, and the three tuning rods (5) are all located on the same horizontal plane. A resonant cavity (401) is provided on the resonant column (4). The tuning rods (5) located on both sides have one end placed in the cavity (1) and are respectively plugged into the resonant cavities (401) on the two resonant columns (4). The tuning rod (5) located in the middle has one end placed in the cavity (1) and is arranged between the two resonant columns (4).

8. The window coupling structure of the enhanced duplexer filter according to claim 7, characterized in that: A fixing platform (105) is provided on the inner wall of the cavity (1), and mounting holes (104) are provided on the fixing platform (105) and the cavity (1). A resonant screw (403) is provided in the resonant column (4), and the resonant screw (403) passes through the resonant column (4) and is threadedly connected in the mounting hole (104).

9. The window coupling structure of an enhanced duplexer filter according to claim 1, characterized in that: An input fixing plate (201) is provided on the input connector (2), an input fixing screw (202) is provided on the input fixing plate (201), one end of the input fixing screw (202) passes through the input fixing plate (201) and is threadedly connected to the cavity (1), and an input coupling fixing screw (205) is connected between the input round head coupling gasket (204) and the input core rod (203).

10. The window coupling structure of an enhanced duplexer filter according to claim 1, characterized in that: An output fixing plate (301) is provided on the output connector (3), an output fixing screw (302) is provided on the output fixing plate (301), one end of the output fixing screw (302) passes through the output fixing plate (301) and is threadedly connected to the cavity (1), and an output coupling fixing screw (305) is connected between the output round head coupling gasket (304) and the output core rod (303).

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