A filter low pass component

Abstract

The present invention relates to a filter low-pass component, comprising an input port, an output port and a transmission line segment arranged between the input port and the output port, wherein the transmission line segment comprises a plurality of low-impedance transmission line segments and a plurality of high-impedance transmission line segments, wherein the low-impedance transmission line segments and the high-impedance transmission line segments are arranged in sequence and spaced apart from each other, an insulating shell is integrally formed on the outside of each low-impedance transmission line segment, and an elastic member is integrally formed between two adjacent insulating shells. The present invention can ensure the stability of the assembly of the low-pass component and improve the stability of the filter intermodulation.

Description

[Technical field]

[0001] The present invention relates to the technical field of radio frequency communication, and in particular to a low-pass filter component. [Background technology]

[0002] As a key component of the filter, the stability of the assembly of the low-pass component has a great influence on the intermodulation of the filter.

[0003] Traditional low-pass filter components usually have a pre-made insulating heat shrink tubing on the outside of their low-impedance transmission line segments to achieve insulation between them and the inner wall of the filter cavity. The thickness and tightness of the insulating heat shrink tubing cannot be controlled, which will affect the stability of the low-pass component assembly and thus have a great impact on the intermodulation of the filter. [Summary of the invention]

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned technology and provide a filter low-pass component, which can ensure the stability of the assembly of the low-pass component and improve the stability of the filter intermodulation.

[0005] A filter low-pass component provided by the present invention comprises an input port, an output port and a transmission line segment arranged between the input port and the output port, wherein the transmission line segment comprises a plurality of low-impedance transmission line segments and a plurality of high-impedance transmission line segments, wherein the low-impedance transmission line segments and the high-impedance transmission line segments are arranged in sequence with intervals, an insulating shell is integrally formed on the outside of each low-impedance transmission line segment, and an elastic member is integrally formed between two adjacent insulating shells.

[0006] Furthermore, the elastic member is located above the corresponding high-impedance transmission line segment.

[0007] Furthermore, a convex portion is formed on a side of the elastic member away from the corresponding high-impedance transmission line segment.

[0008] Furthermore, the cross-sectional shape of the protrusion is square, circular, trapezoidal or triangular.

[0009] Furthermore, the elastic member is arc-shaped.

[0010] Furthermore, the elastic member is wrapped around the outside of the corresponding high-impedance transmission line segment.

[0011] Furthermore, the cross-sectional shape of the elastic member is circular or square.

[0012] Furthermore, two opposite side surfaces of the insulating shell are respectively formed with protrusions.

[0013] Furthermore, an insulating shell is integrally injection-molded on the outside of each low-impedance transmission line segment, and an elastic member is integrally injection-molded between two adjacent insulating shells.

[0014] Furthermore, the transmission line segment includes six low-impedance transmission line segments and five high-impedance transmission line segments, wherein the first low-impedance transmission line segment and the last low-impedance transmission line segment are connected to the input port and the output port respectively.

[0015] The present invention can ensure the stability of the size of the low-pass component by integrally forming an insulating shell on the outside of each low-impedance transmission line segment and integrally forming an elastic part between two adjacent insulating shells. When the low-pass component is installed in the filter cavity, the low-pass component can be firmly assembled without loosening, thereby improving the stability of the filter intermodulation.

Brief Description of the Drawings

[0016] Figure 1 A schematic front view of a low-pass filter component provided by an embodiment of the present invention;

[0017] Figure 2 yes Figure 1 An exploded schematic diagram of the low-pass components of the filter shown;

[0018] Figure 3 yes Figure 1 A cross-sectional schematic diagram of the filter low-pass component shown is installed in the filter cavity. [Specific implementation method]

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] refer to Figures 1 to 3 The present invention provides a filter low-pass component, comprising an input port 10, an output port 20, and a transmission line segment arranged between the input port 10 and the output port 20. The transmission line segment comprises a plurality of low-impedance transmission line segments 31 and a plurality of high-impedance transmission line segments 32. The low-impedance transmission line segments 31 and the high-impedance transmission line segments 32 are arranged in sequence.

[0021] Preferably, the input port 10, the transmission line segment and the output port 20 are integrally formed to facilitate manufacturing.

[0022] Each low-impedance transmission line segment 31 is integrally formed with an insulating housing 40, and an elastic member 41 is integrally formed between two adjacent insulating housings 40. With this structure, the size of the low-pass component is relatively stable. When the low-pass component is installed in the filter cavity 60, Figure 3 As shown, the low-pass component can be assembled securely without loosening, thereby improving the stability of the filter intermodulation.

[0023] Preferably, the insulating shell 40 is integrally molded on the outside of each low-impedance transmission line segment 31, and the elastic member 41 is integrally molded between two adjacent insulating shells 40. The insulating shell 40 and the elastic member 41 are integrally molded by injection molding, which is easy to manufacture.

[0024] In this embodiment, the transmission line segment includes six low-impedance transmission line segments 31 and five high-impedance transmission line segments 32, wherein the first low-impedance transmission line segment 31 and the last low-impedance transmission line segment 31 are connected to the input port 10 and the output port 20 respectively. Among the six low-impedance transmission line segments 31, the first three low-impedance transmission line segments 31 and the last three low-impedance transmission line segments 31 are arranged in a mirror image, the sizes of the first three low-impedance transmission line segments 31 increase in sequence, and the sizes of the last three low-impedance transmission line segments 32 decrease in sequence. The outer diameters of the five high-impedance transmission line segments 32 are equal, the first two high-impedance transmission line segments 32 and the last two high-impedance transmission line segments 32 are arranged in a mirror image, the lengths of the first two high-impedance transmission line segments 32 increase in sequence, and the lengths of the last two high-impedance transmission line segments 32 decrease in sequence.

[0025] It is understandable that the number of low-impedance transmission line segments 31 and the number of high-impedance transmission line segments 32 can be set according to actual conditions, such as five, four, etc., respectively, or other numbers. The size of the low-impedance transmission line segment 31 and the size of the high-impedance transmission line segment 32 can also be set according to actual conditions.

[0026] In this embodiment, the cross-sectional shapes of the low impedance transmission line segment 31 and the high impedance transmission line segment 32 are square, circular, sheet-shaped, etc. The cross-sectional shapes of the low impedance transmission line segment 31 and the high impedance transmission line segment 32 can be set according to actual conditions. The shape of the insulating housing 40 is adapted to the shape of the corresponding low impedance transmission line segment 31.

[0027] Further, two opposite sides of the insulating housing 40 are respectively formed with protrusions 401. The protrusions 401 extend along the axial direction of the insulating housing 40. The protrusions 401 are not on the same side as the high impedance transmission line segment 32. When the low-pass component is installed in the filter cavity 60, the protrusions 401 are provided. Figure 3 As shown, the protrusion 401 can abut against the two inner side walls of the cavity 60, which can reduce the force-bearing area of ​​the low-pass component, facilitate the installation of the low-pass component, and ensure the size of the low-pass component.

[0028] In this embodiment, the elastic member 41 is arc-shaped and is located above the corresponding high-impedance transmission line segment 32 .

[0029] Furthermore, a convex portion 411 is formed on one side of the elastic member 41 away from the corresponding high impedance transmission line segment 32. The elastic member 41 is configured to be arc-shaped and the convex portion 411 is configured to be configured to be arc-shaped. When the low-pass component is installed in the filter cavity 60, as shown in FIG. Figure 3 As shown, it can abut against the cover plate 61 , which can reduce the force-bearing area of ​​the low-pass component and ensure that the force on the low-pass component is uniform, so that the low-pass component will not shake in the cavity 60 .

[0030] The cross-sectional shape of the convex portion 411 is a trapezoid. It is understandable that the cross-sectional shape of the convex portion 411 can also be, for example, a square, a circle, a triangle, etc., which can be set according to actual conditions.

[0031] In an alternative solution, the elastic member 41 is wrapped around the outside of the corresponding high impedance transmission line segment 32. The cross-sectional shape of the elastic member 41 is circular or square, etc. It can be understood that the cross-sectional shape of the elastic member 41 can also be other shapes.

[0032] The above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, such as combining different features in various embodiments, etc., which all belong to the protection scope of the present invention.

Claims

1. A filter low-pass component, comprising an input port, an output port, and a transmission line segment arranged between the input port and the output port, wherein the transmission line segment comprises a plurality of low-impedance transmission line segments and a plurality of high-impedance transmission line segments, wherein the low-impedance transmission line segments and the high-impedance transmission line segments are arranged in sequence and spaced apart from each other, characterized in that: An insulating shell is integrally formed on the outside of each low-impedance transmission line segment, and two opposite sides of the insulating shell are respectively formed with protrusions; the protrusions extend along the axial direction of the insulating shell; and the protrusions are not on the same side as the high-impedance transmission line segment; an elastic member is integrally formed between two adjacent insulating shells; the elastic member is arc-shaped, and a convex portion is formed on one side of the elastic member away from the corresponding high-impedance transmission line segment; The elastic member is located above the corresponding high-impedance transmission line segment, or the elastic member is wrapped around the outside of the corresponding high-impedance transmission line segment; When the filter low-pass component is installed in the filter cavity, the protrusion abuts against the two inner side walls of the filter cavity, and the convex part of the elastic member abuts against the cover plate of the filter cavity.

2. The low-pass filter component according to claim 1, characterized in that: The cross-sectional shape of the protrusion is square, circular, trapezoidal or triangular.

3. The low-pass filter component according to claim 1, characterized in that: The cross-sectional shape of the elastic member is circular or square.

4. The low-pass filter component according to claim 1, characterized in that: The transmission line segments include six low-impedance transmission line segments and five high-impedance transmission line segments, wherein the first low-impedance transmission line segment and the last low-impedance transmission line segment are connected to the input port and the output port respectively.

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