An ultra-wideband low-intermodulation suspended stripline filter rejection plate

Abstract

The application discloses a kind of ultra-wide band low intermodulation suspended band line filter band-stop piece, it is related to filter technical field, including filter shell, and filter band-stop piece is suspended in filter shell inside by band-stop piece medium, the inside of filter shell is also fixedly provided with multiple groups of filter resonant column, joint inner core is fixedly connected with band-stop piece medium, joint inner core filter and resonant column air coupling realize filtering effect;The ultra-wide band low intermodulation suspended band line filter band-stop piece, by filter cavity, filter band-stop piece, band-stop piece medium, filter resonant column and filter joint, the distance between joint inner core and filter resonant column is adjusted, to realize the frequency and loss suppression required product requirement, cancel traditional large cavity, machine resonant column, flying sense and other accessories, reduce the size and floor area of filter, and make the assembly process of filter has been simplified.

Description

Technical Field

[0001] This invention relates to the field of filter technology, specifically to a bandstop filter with an ultrawide stopband and low intermodulation suspension. Background Technology

[0002] Filters are widely used in communication equipment of China Mobile, China Unicom and China Telecom. They are an indispensable product. However, the high performance of band-stop filters is generally not easy to achieve. They not only meet the needs of the domestic communication field, but also are compatible with the communication standards of Europe, America and Southeast Asia.

[0003] High-performance indicators for band-stop filter products are generally not easy to achieve. The processing cost to meet the needs of mass production of filters is too high and the debugging is difficult, which makes it difficult to achieve ultra-wideband strong suppression of traditional filters. As a result, traditional filters require complex components such as large cavities, machined resonant pillars, and air sensors to solve the above problems. This results in traditional filters having a large size and footprint, and the assembly process is extremely complicated. Summary of the Invention

[0004] The purpose of this invention is to provide an ultra-wide stopband low intermodulation suspended bandline filter bandstop to overcome the shortcomings of the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an ultra-wide stopband low intermodulation suspended stripline filter with a stopper, comprising a filter housing, a filter cavity inside the filter housing, a filter stopper fixedly disposed inside the filter housing, multiple sets of stopper dielectrics fixedly disposed on the inner wall of the filter housing, and the filter stopper suspended inside the filter housing through the stopper dielectrics, multiple sets of filter resonant pillars fixedly disposed inside the filter housing, and multiple sets of filter connectors fixedly disposed on the filter housing, each set of filter connectors having a connector core fixedly disposed on it, the connector core being fixedly connected to the stopper dielectric, and the connector core filter being air-coupled with the resonant pillars to achieve the filtering effect.

[0006] The filter band stopper has multiple sets of dielectric holes, and each set of dielectric holes is fixedly inserted with a band stopper dielectric.

[0007] The connector core is provided in three sets, two of which extend into the filter housing and are welded to both ends of the filter band stop plate.

[0008] The filter housing is also equipped with multiple sets of stabilizing components, each set of which is used to improve the fixing effect of the band-stop medium on the filter band-stop.

[0009] The stabilization component includes an inner stabilizing tube fixedly disposed on the inner wall of one side of the filter housing, and an outer stabilizing tube fixedly disposed on the inner wall of the other side of the filter housing. Both the inner and outer stabilizing tubes are provided with a band-stop slot, and the band-stop slot is the same size as the band-stop of the filter.

[0010] The filter housing can be divided into two parts and fixedly connected by screws. The inner wall of the outer stabilizing tube near the inner stabilizing tube has a funnel-shaped hole, and the inner stabilizing tube can be inserted into the funnel-shaped hole. The inner stabilizing tube near the outer stabilizing tube is funnel-shaped.

[0011] The filter housing has a welding hole. The outer end of the outer stabilizing tube is fixedly connected to a ferrule. The ferrule is fixedly installed in the welding hole. The outer end of the ferrule is fixedly connected to a welding wire. The welding wire is located in the welding hole and its size is smaller than the size of the welding hole.

[0012] In the above technical solution, the present invention provides an ultra-wide stopband low intermodulation suspended stripline filter with a band stopper. By adjusting the distance between the inner core of the connector and the resonant column of the filter through the filter cavity, filter band stopper, band stopper dielectric, filter resonant column and filter connector, the required frequency and loss suppression of the product can be achieved. The traditional large cavity, machined resonant column, and other accessories are eliminated, reducing the size and footprint of the filter and simplifying the assembly process of the filter. By using an inner stabilizing tube, an outer stabilizing tube, a filter housing that can be split into two, welding holes, and welding wires, the assembly process is simplified compared to the traditional filter assembly process, while improving the stability of the filter during use. The filter band stop is fixed by the inner stabilizing tube, outer stabilizing tube, funnel-shaped hole and band stop slot, which improves the fixing effect of the band stop dielectric on the filter band stop suspension, making the filter more stable and less prone to damage during use. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention; Figure 2 A front sectional view of the internal structure provided in an embodiment of the present invention; Figure 3 This is a side sectional view of the internal structure provided in an embodiment of the present invention; Figure 4An exploded view of the structure of the stabilizing component provided in an embodiment of the present invention; Figure 5 A side sectional view of an exploded view of a stabilizing component provided in an embodiment of the present invention; Figure 6 Provided for embodiments of the present invention Figure 3 Enlarged view of the structure at point A in the middle.

[0015] Explanation of reference numerals in the attached figures: 1. Filter housing; 2. Filter cavity; 3. Filter with stop plate; 4. Dielectric hole; 5. Dielectric with stop plate; 6. Filter resonant post; 7. Filter connector; 8. Connector core; 9. Stabilizing component; 10. Welding hole; 11. Inner stabilizing tube; 12. Outer stabilizing tube; 13. Stop plate slot; 14. Bucket-shaped hole; 15. Sleeve; 16. Welding wire. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0017] Please see Figure 1-6 This invention provides an ultra-wide stopband low intermodulation suspended stripline filter with a bandstop, comprising a filter housing 1, a filter cavity 2 inside the filter housing 1, a filter bandstop 3 fixedly disposed inside the filter housing 1, multiple sets of bandstop dielectric 5 fixedly disposed on the inner wall of the filter housing 1, and the filter bandstop 3 suspended inside the filter housing 1 through the bandstop dielectric 5. Multiple sets of filter resonant pillars 6 are also fixedly disposed inside the filter housing 1, and multiple sets of filter connectors 7 are fixedly disposed on the filter housing 1. Each set of filter connectors 7 is fixedly disposed with a connector core 8, the connector core 8 is fixedly connected to the bandstop dielectric 5, and the filter in the connector core 8 is air-coupled with the resonant pillar to achieve the filtering effect.

[0018] The filter band stopper 3 has multiple sets of dielectric holes 4, and each set of dielectric holes 4 has a band stopper dielectric 5 fixedly inserted into it.

[0019] There are three sets of connector cores 8, two of which extend into the filter housing 1 and are welded to both ends of the filter band stop plate 3.

[0020] When the filter is working, the inner core 8 of the connector, which is not air-coupled with the filter resonant post 6, serves as the input terminal. The signal is transmitted through the filter band-stop plate 3 to the inner core 8 of the connector at the other end of the filter band-stop plate 3. Then, under the action of the filter resonant post 6, the signal is output from the other inner core 8 through air coupling, thus achieving the filtering effect of the band-stop filter. The coupling coefficient of the filter is adjusted by adjusting the distance between the inner core 8 of the connector and the filter resonant post 6, so as to achieve the required frequency and loss suppression of the product. The filter of this application eliminates the traditional large cavity, machined resonant post, air sensor and other accessories. It adopts filter cavity 2, filter band-stop plate 3, band-stop plate dielectric 5, filter resonant post 6 and filter connector 7, thus achieving the filtering effect of the band-stop filter, reducing the size and footprint of the filter, and simplifying the assembly process of the filter. It should be noted that the filter band stop plate 3, filter resonant post 6 and connector core 8 need to be welded. This not only achieves low electrical loss, high suppression and impedance matching, but also gives the structure stability and environmental resistance. It is one of the key processes to ensure the performance and reliability of the filter. The filter cavity 2 uses a traditional aluminum alloy band resistor cavity, but its volume is much smaller than that of a traditional filter cavity. The filter band resistor 3 is made of silver-plated iron, the band resistor dielectric 5 is made of polytetrafluoroethylene, the filter resonant post 6 is made of aluminum alloy to ensure stable signal transmission, and the filter connector 7 is made of aluminum alloy beryllium bronze.

[0021] See Figure 1-6 The filter housing 1 is also equipped with multiple sets of stabilizing components 9, each set of stabilizing components 9 is used to improve the fixing effect of the band stop medium 5 on the filter band stop 3.

[0022] The stabilization component 9 includes an inner stabilizing tube 11 fixedly disposed on the inner wall of one side of the filter housing 1, and an outer stabilizing tube 12 fixedly disposed on the inner wall of the other side of the filter housing 1. Both the inner stabilizing tube 11 and the outer stabilizing tube 12 are provided with a stripper slot 13, and the stripper slot 13 is the same size as the filter stripper 3.

[0023] The filter housing 1 can be divided into two parts and fixedly connected by screws. The inner wall of the outer stabilizing tube 12 near the inner stabilizing tube 11 has a funnel-shaped hole 14. The inner stabilizing tube 11 can be inserted into the funnel-shaped hole 14. The end of the inner stabilizing tube 11 near the outer stabilizing tube 12 is set in a funnel shape.

[0024] The filter housing 1 has a welding hole 10. The outer end of the outer stabilizing tube 12 is fixedly connected to the sleeve 15. The sleeve 15 is fixedly installed in the welding hole 10. The outer end of the sleeve 15 is fixedly connected to the welding wire 16. The welding wire 16 is located in the welding hole 10 and the size of the welding wire 16 is smaller than the size of the welding hole 10.

[0025] During filter installation, the filter band-stop plate 3 is aligned with the band-stop plate slots 13 of the inner stabilizing tube 11 and the outer stabilizing tube 12 and inserted. Then, the connector core 8 is welded to the band-stop plate slots 13 and the filter resonant column 6. The two-part filter housing 1 is then joined together and fixed with screws. As the screws are tightened, the two-part filter housing 1 gradually moves closer together, further fixing the filter band-stop plate 3. After all the screws on the filter housing 1 are tightened, the welding wire 16 in the welding hole 10 is melted and cooled by welding to complete the installation of the entire filter. Compared with the traditional filter assembly process, the assembly steps are simplified, and the stability of the filter during use is improved. As the two filter housings 1 gradually approach each other, the inner stabilizing tube 11 and the outer stabilizing tube 12 gradually approach each other, causing the inner stabilizing tube 11 to be inserted into the funnel-shaped hole 14. Since the inner stabilizing tube 11 is funnel-shaped, during the process of inserting the inner stabilizing tube 11 into the funnel-shaped hole 14, under the action of the funnel-shaped hole 14 and the funnel-shaped part of the inner stabilizing tube 11, the size of the band-stop slot 13 of the inner stabilizing tube 11 will decrease, thereby fixing the filter band-stop 3, improving the fixing effect of the band-stop medium 5 on the suspension of the filter band-stop 3, making the filter more stable and less prone to damage during use; It should be noted that the tilt angle of the inner stabilizing tube 11 and the funnel-shaped hole 14 does not exceed ten degrees, so as to ensure that the inner stabilizing tube 11 is within a reasonable deformation range and does not affect the signal transmission effect of the filter bandstop 3.

[0026] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An ultra-wideband low-intermodulation suspended stripline filter rejection tile, characterized by, The filter housing includes a filter housing (1), a filter cavity (2) is provided inside the filter housing (1), a filter band stopper (3) is fixedly provided inside the filter housing (1), multiple sets of band stopper media (5) are fixedly provided on the inner wall of the filter housing (1), and the filter band stopper (3) is suspended inside the filter housing (1) through the band stopper media (5). Multiple sets of filter resonant pillars (6) are fixedly provided inside the filter housing (1), and multiple sets of filter connectors (7) are fixedly provided on the filter housing (1). Each set of filter connectors (7) is fixedly provided with a connector core (8). The connector core (8) is fixedly connected to the band stopper media (5), and the connector core (8) is air-coupled with the resonant pillar to achieve the filtering effect. The connector core (8) is provided in three sets. Two sets of the connector core (8) extend into the filter housing (1) and are welded to both ends of the filter band stop plate (3). The other set of the connector core (8) is coupled to the resonant post.

2. The bandstop of an ultra-wide stopband low intermodulation suspended bandline filter according to claim 1, characterized in that, The filter band stopper (3) has multiple sets of dielectric holes (4), and each set of dielectric holes (4) is fixedly inserted with a band stopper dielectric (5).

3. The bandstop of an ultra-wide stopband low intermodulation suspended bandline filter according to claim 1, characterized in that, The filter housing (1) is also fixedly provided with multiple sets of stabilizing components (9), each set of stabilizing components (9) is used to improve the fixing effect of the band stop medium (5) on the filter band stop (3).

4. The bandstop of an ultra-wide stopband low intermodulation suspended bandline filter according to claim 3, characterized in that, The stabilization component (9) includes an inner stabilizing tube (11) fixedly disposed on the inner wall of one side of the filter housing (1), and an outer stabilizing tube (12) fixedly disposed on the inner wall of the other side of the filter housing (1). Both the inner stabilizing tube (11) and the outer stabilizing tube (12) are provided with a band-stop slot (13), and the band-stop slot (13) is the same size as the band-stop (3) of the filter.

5. The bandstop of an ultra-wide stopband low intermodulation suspended stripline filter according to claim 4, characterized in that, The filter housing (1) can be divided into two parts and fixedly connected by screws. The inner wall of the outer stabilizing tube (12) near the inner stabilizing tube (11) is provided with a funnel-shaped hole (14). The inner stabilizing tube (11) can be inserted into the funnel-shaped hole (14). The inner stabilizing tube (11) near the outer stabilizing tube (12) is set in a funnel shape.

6. The bandstop of an ultra-wide stopband low intermodulation suspended bandline filter according to claim 5, characterized in that, The filter housing (1) has a welding hole (10). The outer end of the outer stabilizing tube (12) is fixedly connected to a sleeve (15). The sleeve (15) is fixedly installed inside the welding hole (10). The outer end of the sleeve (15) is fixedly connected to a welding wire (16). The welding wire (16) is located inside the welding hole (10) and the size of the welding wire (16) is smaller than the size of the welding hole (10).

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