Integrated small filter

Abstract

The utility model relates to the technical field of communication, and discloses an integrated small filter. The multiple groups of first tuning assemblies are arranged in the cavity at intervals; the cavity is provided with a port communicated with the outside in a penetrating mode, and the multiple sets of second tuning assemblies are arranged in the cavity at intervals and close to the port. The cross coupling assembly is arranged in the cavity and located between the multiple sets of first tuning assemblies and the multiple sets of second tuning assemblies. The cover body covers and seals the cavity, and one end of the first tuning assembly and one end of the second tuning assembly penetrate through the cover body and are accommodated in the cavity; the second tuning assembly comprises a sheet-shaped resonant column and a second tuning screw, the sheet-shaped resonant column is fixed on the bottom wall of the cavity, the top end of the sheet-shaped resonant column forms a bending part along the horizontal direction, and the second tuning screw penetrates through the cover body and the bending part; one end of the connecting assembly penetrates through the port, and the other end is fixedly connected with the sheet-shaped resonant column. By optimizing the filter structure, the occupied space of each component at the port is reduced, the connection stability at the port is improved, the flexibility of the internal space is maintained, and the space utilization rate is improved.

Description

Technical Field

[0001] This application relates to the technical field of communications, and in particular, to an integrated small filter. Background Art

[0002] After years of development, civilian wireless communication technology has entered the 5G era. At the same time, filters have gradually developed towards miniaturization, low power consumption, and low price. As miniaturized filters become more and more common, higher performance requirements for filters are imposed, making the port positions fixed and the space small, with limited operating space, and it is not convenient to perform operations such as assembly and welding during the production process. Therefore, it is very necessary to invent a filter with flexible space in the cavity and at the port positions and convenient operation. Summary of the Utility Model

[0003] The technical problem to be solved by this application is to optimize the existing filter structure, reduce the occupied space of each component at the port, improve the stability of the connection at the port, while maintaining the flexibility of the internal space and improving the space utilization rate.

[0004] To solve the above problems, this application provides an integrated small filter, which includes a cavity, a cover body, a cross-coupling component, a connection component, multiple groups of first tuning components, and multiple groups of second tuning components; multiple groups of the first tuning components are spaced in the cavity; the cavity is provided with a port communicating with the outside, and multiple groups of the second tuning components are spaced in the cavity and close to the port; the cross-coupling component is arranged in the cavity and located between multiple groups of the first tuning components and the second tuning components; the cover body covers and seals the cavity, and one end of the first tuning component and the second tuning component penetrates the cover body and is accommodated in the cavity; the second tuning component includes a sheet-shaped resonant column and a second tuning screw, the sheet-shaped resonant column is fixed on the bottom wall of the cavity, a bending part is formed horizontally at the top end of the sheet-shaped resonant column, and the second tuning screw penetrates the cover body and the bending part; one end of the connection component penetrates the port, and the other end is fixedly connected to the sheet-shaped resonant column.

[0005] Preferably, the first tuning component includes a cross-coupling resonant column and a first tuning screw, the cross-coupling resonant column is fixed on the bottom wall of the cavity, and the first tuning screw penetrates the cover body and is located directly above the cross-coupling resonant column.

[0006] Preferably, the cross-coupling resonant column is integrally formed with a sheet-shaped resonant part, and one end of the sheet-shaped resonant part away from the cross-coupling resonant column is suspended in the cavity.

[0007] Preferably, the cross-coupling component includes a first coupling rod and a second coupling rod. The first coupling rod and the second coupling rod are respectively fixed at two ends of the bottom wall of the cavity. The first coupling rod is located between multiple groups of the first tuning components, and the second coupling rod is located between the second tuning component and the first tuning components.

[0008] Preferably, the filter further includes a partition plate for separating signals. The partition plate extends along the height direction of the cavity, and the top of the partition plate is horizontal with the top of the side wall of the cavity. Multiple groups of the first tuning components and multiple groups of the second tuning components are arranged on both sides of the partition plate.

[0009] Preferably, the partition plate is provided with a coupling slot, and the cross-coupling component passes through the coupling slot.

[0010] Preferably, the port includes an inlet and an outlet. The partition plate has a connecting portion, and the connecting portion connects the side wall of the cavity between the inlet and the outlet. The second tuning components are respectively located on both sides thereof.

[0011] Preferably, the filter further includes a coupling screw, and one end of the coupling screw passes through the cover body and is accommodated in the cavity.

[0012] Preferably, the connecting component includes a PIN pin and a connecting medium. The connecting medium penetrates through the port and is fixed at the port; one end of the PIN pin penetrates through the connecting medium, and the other end is connected to the second tuning component.

[0013] Compared with the prior art, the present application includes at least one of the following beneficial technical effects:

[0014] Herein, multiple groups of the first tuning components and multiple groups of the second tuning components are respectively fixed in the cavity. The first tuning components and the second tuning components are used to generate resonant frequencies, filter out unwanted frequency signals, and directly form coupling. The cover body is formed by stamping and is used to seal the cavity so that the signal is only transmitted in the cavity. The cross-coupling component utilizes the coupling between the first tuning components and the second tuning components to achieve frequency selection, and can suppress adjacent-frequency interference and multipath interference, improving the anti-interference performance of the filter. The connecting component is used to form capacitive coupling of the resonant port and allow the main path signal to pass through.

[0015] The second tuning component uses a sheet-shaped resonant column instead of a traditional cylindrical resonant column, which can reduce the occupied space of the sheet-shaped resonant column. By positioning the second tuning screw at the center of the bending part, the frequency error caused by the tolerances of the cavity and the sheet-shaped resonant column can be corrected, and at the same time, the internal space of the cavity is flexibly utilized. Fixing one end of the connection component to the connection part of the sheet-shaped resonant column can improve the stability and consistency of the connection at the port. Here, by optimizing the existing filter structure, the occupied space of each component at the port is reduced, the stability of the connection at the port is improved, and at the same time, the flexibility of the internal space is maintained to improve the space utilization rate. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the integrated small filter in the embodiment of the present application.

[0018] Figure 2 It is a schematic diagram of the internal structure of the cavity in the embodiment of the present application.

[0019] Figure 3 It is a schematic diagram of the assembly relationship among the first tuning screw, the second tuning screw and the coupling screw in the embodiment of the present application.

[0020] Description of the reference numerals: 1, cavity; 11, port; 111, inlet; 112, outlet; 2, cover; 3, coupling screw; 4, connection component; 41, PIN needle; 42, connection medium; 5, first tuning component; 51, cross-coupling resonant column; 511, sheet-shaped resonant part; 52, first tuning screw; 6, second tuning component; 61, sheet-shaped resonant column; 611, fixing part; 612, bending part; 62, second tuning screw; 7, partition board; 71, coupling slot; 72, connection part; 8, first coupling rod; 9, second coupling rod. Detailed Embodiments

[0021] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some, rather than all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0022] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0023] It should also be understood that the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. As used in the specification of this application and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0024] It should be further understood that the term "and / or" used in the specification of this application and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0025] Please refer to Figures 1 to 3 , the embodiment of this application provides an integrated small filter, which includes a cavity 1, a cover 2, a cross-coupling component, a connection component 4, multiple groups of first tuning components 5, and multiple groups of second tuning components 6. Among them, the cavity 1 is integrally die-cast or machined, and multiple groups of first tuning components 5 are arranged at intervals in the cavity 1; the cavity 1 is provided with a port 11 communicating with the outside through it, and multiple groups of second tuning components 6 are arranged at intervals in the cavity 1 and close to the port 11; the cross-coupling component is arranged in the cavity 1 and located between multiple groups of first tuning components 5 and second tuning components 6; the cover 2 covers and seals the cavity 1, and one end of the first tuning component 5 and the second tuning component 6 penetrates through the cover 2 and is placed in the cavity 1.

[0026] Specifically, the second tuning component 6 includes a sheet-shaped resonant column 61 and a second tuning screw 62. Among them, the sheet-shaped resonant column 61 is integrally stamped or machined, the bottom end of the sheet-shaped resonant column 61 is fixed to the bottom wall of the cavity 1 by welding, a fixing portion 611 is formed by bending the middle part of the sheet-shaped resonant column 61 in the horizontal direction, and a bending portion 612 is formed in the horizontal direction at the top end of the sheet-shaped resonant column 61. In this embodiment, the bending portion 612 is semicircular. When the cover 2 covers and seals the cavity 1, the second tuning screw 62 sequentially penetrates through the cover 2 and the center of the bending portion 612. One end of the connection component 4 penetrates through the port 11 to connect an external circuit, and the other end is fixedly connected to the fixing portion 611 of the sheet-shaped resonant column 61.

[0027] Here, multiple groups of first tuning components 5 and multiple groups of second tuning components 6 are respectively fixed inside the cavity 1. The first tuning components 5 and the second tuning components 6 are used to generate resonant frequencies, filter out unwanted frequency signals, and directly form a coupling. The cover 2 is formed by stamping and is used to seal the cavity 1 so that the signal is only transmitted inside the cavity 1. The cross-coupling component utilizes the coupling between the first tuning component 5 and the second tuning component 6 to achieve frequency selection, and can suppress adjacent-channel interference and multipath interference, improving the anti-interference performance of the filter. The connection component 4 is used to form a capacitive coupling of the resonant port 11 and allow the main path signal to pass through.

[0028] The second tuning component 6 uses a sheet-shaped resonant column 61 to replace the traditional cylindrical resonant column, which can reduce the occupied space of the sheet-shaped resonant column 61, thereby saving the space inside the cavity and facilitating subsequent operations such as soldering or laser welding. By positioning the second tuning screw 62 at the center of the curvature of the bent portion 612, the frequency error caused by the tolerances of the cavity 1 and the sheet-shaped resonant column 61 can be corrected, and at the same time, the internal space of the cavity 1 is flexibly utilized. Fixing one end of the connection component 4 to the fixing portion 611 of the sheet-shaped resonant column 61 can improve the stability and consistency of the connection at the port 11. Here, by optimizing the existing filter structure, the occupied space of each component at the port 11 is reduced, the stability of the connection at the port 11 is improved, and at the same time, the flexibility of the internal space is maintained, improving the space utilization rate.

[0029] Please refer to Figure 2 and Figure 3 In a specific embodiment, the first tuning component 5 includes a cross-coupling resonant column 51 and a first tuning screw 52. Among them, the bottom of the cross-coupling resonant column 51 is fixed to the bottom wall of the cavity 1, and the first tuning screw 52 passes through the cover 2 and is located directly above the cross-coupling resonant column 51. The cross-coupling resonant column 51 is integrally formed by stamping or machining and is used to generate resonant frequencies and filter out unwanted frequency signals. The first tuning screw 52 is used to correct the frequency error caused by the tolerances of the cavity 1 and the cross-coupling resonant column 51.

[0030] Furthermore, sheet-shaped resonant portions 511 are integrally formed at the tops of two adjacent cross-coupling resonant columns 51 respectively, and the two sheet-shaped resonant portions 511 are symmetrical. In this embodiment, the sheet-shaped resonant portion 511 is L-shaped. One end of the sheet-shaped resonant portion 511 is parallel to the bottom wall of the cavity 1, and the other end is parallel to the side wall of the cavity 1 and is suspended inside the cavity 1. Here, the sheet-shaped resonant portion 511 can perform capacitive cross-coupling to suppress unwanted frequency signals.

[0031] In a specific embodiment, the cross-coupling component includes a first coupling rod 8 and a second coupling rod 9. Among them, the first coupling rod 8 and the second coupling rod 9 are respectively fixed at both ends of the bottom wall of the cavity 1. The first coupling rod 8 is located between multiple groups of first tuning components 5, and the second coupling rod 9 is located between the second tuning component 6 and the first tuning component 5. By setting the first coupling rod 8 and the second coupling rod 9, cross-coupling between different spaces in the cavity 1 can be achieved, which is beneficial to the miniaturized design of the filter.

[0032] In a specific embodiment, the filter further includes a barrier plate 7 for separating signals. Among them, the barrier plate 7 extends along the height direction of the cavity 1, and the top of the barrier plate 7 is horizontal with the top of the side wall of the cavity 1. Multiple groups of first tuning components 5 and multiple groups of second tuning components 6 are arranged on both sides of the barrier plate 7. The barrier plate 7 is used to block signals to prevent unwanted signals from passing through.

[0033] Furthermore, the barrier plate 7 is provided with coupling slots 71, and the cross-coupling component passes through the coupling slots 71. In this embodiment, there are two coupling slots 71, and the coupling slots 71 are formed by the barrier plate 7 opening downward from the top. Here, a tuning screw penetrates through the cover plate and is accommodated in one of the coupling slots 71, and the second coupling rod 9 passes through the other coupling slot 71. By providing the coupling slots 71 in the barrier plate 7 to achieve cross-coupling between different spaces in the cavity 1, the effective space occupied by the cross-coupling component in the cavity 1 can be reduced, thereby improving the performance of the filter.

[0034] In a specific embodiment, the port 11 includes an inlet 111 and an outlet 112. Among them, the barrier plate 7 has a connecting portion 72, and the connecting portion 72 connects the side wall of the cavity 1 between the inlet 111 and the outlet 112. In this embodiment, two groups of second tuning components 6 are provided, which are respectively located on both sides of the connecting portion 72. One group of second tuning components 6 is connected to the inlet 111 through a connecting component 4, and the other group of second tuning components 6 is connected to the outlet 112 through a connecting component 4. The connecting portion 72 is used to block the signals between the inlet 111 and the outlet 112 to avoid mutual interference, thereby improving the stability of the filter operation.

[0035] In a specific embodiment, the filter further includes a plurality of coupling screws 3 arranged at intervals. One end of the coupling screw 3 penetrates through the cover body 2 and is accommodated in the cavity 1. The coupling screw 3 is used to correct the coupling error caused by the machining tolerance of the cavity 1 and reduce the influence of the coupling error on the main path signal, thereby improving the performance of the filter.

[0036] In a specific embodiment, the connection component 4 includes a PIN pin 41 and a connection medium 42. Among them, the connection medium 42 penetrates through the port 11 and is fixed at the port 11; one end of the PIN pin 41 penetrates through the connection medium 42 to connect an external circuit, and the other end is connected to the fixing portion 611 of the sheet-shaped resonator column 61. The connection medium 42 is used to insulate the cavity 1 from the PIN pin 41 and fix the PIN pin 41. The PIN pin 41 is used to form capacitive coupling of the resonant port 11 and transmit the main path signal at the same time.

[0037] As mentioned above, the above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An integrated small filter, characterized in that: It includes a cavity, a cover, a cross-coupling component, a connecting component, a plurality of groups of first tuning components and a plurality of groups of second tuning components; A plurality of groups of the first tuning components are arranged in the cavity at intervals; a port connected to the outside is opened through the cavity, and a plurality of groups of the second tuning components are arranged in the cavity at intervals and close to the port; The cross-coupling component is disposed in the cavity and is located between a plurality of groups of the first tuning components and the second tuning components; The cover body covers and seals the cavity, and one end of the first tuning component and the second tuning component passes through the cover body and is accommodated in the cavity; The second tuning component comprises a sheet-like resonant column and a second tuning screw, wherein the sheet-like resonant column is fixed to the bottom wall of the cavity, a curved portion is formed at the top of the sheet-like resonant column along the horizontal direction, and the second tuning screw passes through the cover and the curved portion; One end of the connecting component passes through the port, and the other end is fixedly connected to the sheet-shaped resonant column.

2. The integrated miniature filter according to claim 1, characterized in that: The first tuning component includes a cross-coupling resonant column and a first tuning screw. The cross-coupling resonant column is fixed to the bottom wall of the cavity. The first tuning screw passes through the cover and is located directly above the cross-coupling resonant column.

3. The integrated miniature filter according to claim 2, characterized in that: The cross-coupled resonant column is integrally formed with a sheet-shaped resonant portion, and one end of the sheet-shaped resonant portion away from the cross-coupled resonant column is suspended in the cavity.

4. An integrated small filter according to claim 1 or 2, characterized in that: The cross-coupling component includes a first coupling rod and a second coupling rod, the first coupling rod and the second coupling rod are respectively fixed to the two ends of the bottom wall of the cavity, the first coupling rod is located between multiple groups of the first tuning components, and the second coupling rod is located between the second tuning component and the first tuning component.

5. An integrated small filter according to claim 1 or 2, characterized in that: The filter also includes a blocking plate for isolating signals, the blocking plate extends along the height direction of the cavity, and the top of the blocking plate is level with the top of the cavity side wall, and multiple groups of the first tuning components and multiple groups of the second tuning components are arranged on both sides of the blocking plate.

6. The integrated miniature filter according to claim 5, characterized in that: The blocking plate is provided with a coupling slot, and the cross-coupling component passes through the coupling slot.

7. The integrated miniature filter according to claim 5, characterized in that: The port includes an inlet and an outlet, the baffle plate has a connecting portion, the connecting portion connects the cavity side wall between the inlet and the outlet, and the second tuning components are respectively located on both sides.

8. An integrated small filter according to claim 1 or 2, characterized in that: The filter also includes a coupling screw, one end of which passes through the cover and is accommodated in the cavity.

9. An integrated small filter according to claim 1 or 2, characterized in that: The connection component includes a PIN needle and a connection medium, wherein the connection medium passes through the port and is fixed at the port; one end of the PIN needle passes through the connection medium, and the other end is connected to the second tuning component.

Images