Wave trap

Abstract

The utility model provides a wave trap, which comprises a conductive cylinder and an inductor, the conductive cylinder is provided with a cylinder wall extending from the bottom to the top, and the inductor is positioned on the outer side of the cylinder wall; the first end of the inductor penetrates through the cylinder wall into the conductive cylinder, then is bent and extends out of the opening of the conductive cylinder, and is electrically connected to the cylinder wall. According to the scheme, the first end of the inductor penetrates through the cylinder wall, extends into the conductive cylinder and then is bent and extends out of the opening of the conductive cylinder, and the first end is electrically connected to the cylinder wall, so that a conductive rod on the conductive cylinder is omitted, the bent inductor is connected to the circuit board, and compared with a traditional port form, the cost can be remarkably reduced, and the reliability problem is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of antennas, and in particular relates to a wave trap. Background Art

[0002] A notch filter is also called a band-stop filter or a stop-band filter. From the name we can know that it is a device that blocks certain specific frequencies from passing through, while passing other frequencies directly.

[0003] Notch filters are mainly used in signal processing, signal detection, and signal filtering to reduce noise in signals, or filter out carrier signals that we are not interested in, improve receiving sensitivity, and obtain a higher signal-to-noise ratio. In communication systems, we use notch filters to reduce the amount of noise picked up by the receiver, reduce noise, and improve receiving sensitivity. In addition, it can also block radio signals from radiating into the surrounding environment to avoid interfering with other devices. In laboratory testing, in order to improve test accuracy, we often use notch filters to filter out interference from other devices. Notch filters can also be used in mobile phones, routers, and radio communications to eliminate interference in communication systems. Notch filters can also be used in medical equipment and audio equipment to improve signal quality.

[0004] In the related technology, the outer cylindrical shell and center conductor of the one-piece trap on the market need to be turned, which has a difficult manufacturing process and high material cost. Although the split trap reduces the difficulty of processing and manufacturing the outer cylindrical shell of the trap, the welding connection or riveting connection increases the complexity of the manufacturing process of the finished trap and reduces the connection reliability. Utility Model Content

[0005] The technical purpose of the utility model is to provide a wave trap, which can significantly reduce costs and avoid reliability problems by eliminating the conductive rod on the conductive tube and connecting to the circuit board using a bent inductor compared to the traditional port form.

[0006] In order to solve the above technical problems, the utility model is implemented as follows: a wave trap is provided, comprising a conductive tube and an inductor, wherein the conductive tube has a tube wall extending from the bottom to the top, and the inductor is located on the outside of the tube wall; the first end of the inductor passes through the tube wall into the conductive tube, and then bends and extends outside the opening of the conductive tube, and the first end is electrically connected to the tube wall.

[0007] Furthermore, the first end includes a penetration section passing through the cylinder wall and electrically connected to the cylinder wall, and a bending section bent and connected to an end of the penetration section and extending out of the opening of the conductive cylinder.

[0008] Furthermore, the penetration section extends in the radial direction of the conductive cylinder.

[0009] Furthermore, the bent section extends in the axial direction of the conductive tube.

[0010] Furthermore, the bending section and the conductive tube are coaxial.

[0011] Furthermore, the cylinder wall is provided with a through opening, and the first end is arranged at the through opening and welded to the wall surface of the through opening.

[0012] Furthermore, the through opening is a notch of the cylinder wall located at the opening of the conductive cylinder.

[0013] Furthermore, the conductive cylinder is a cylinder formed by a stretching process.

[0014] Furthermore, the wave trap also includes an insulating sleeve wrapped around the outer side of the conductive cylinder.

[0015] Furthermore, the inductor is formed by a bending process.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] In this solution, the first end of the inductor passes through the tube wall into the conductive tube, and then bends and extends to the outside of the opening of the conductive tube. The first end is electrically connected to the tube wall. The conductive rod on the conductive tube is eliminated, and the bent inductor is connected to the circuit board. Compared with the traditional port form, it can significantly reduce costs and avoid reliability issues. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the wave trap in the embodiment of the utility model;

[0019] Figure 2 yes Figure 1 Schematic diagram of the structure of the conductive tube and insulating sleeve of the middle trap after being cut along the AA direction.

[0020] In the accompanying drawings, the reference numerals represent: 1, conductive tube; 11, tube wall; 111, through opening; 2, inductor; 21, penetration section; 22, bending section; 3, insulating sleeve. DETAILED DESCRIPTION

[0021] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the utility model, and cannot be understood as limiting the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In this embodiment, combined with Figure 1-2 , a wave trap is provided, comprising a conductive tube 1 and an inductor 2, wherein the conductive tube 1 has a tube wall 11 extending from the bottom to the top, and the inductor 2 is located on the outside of the tube wall 11; a first end of the inductor 2 passes through the tube wall 11 into the conductive tube 1, and then bends and extends to the outside of the opening of the conductive tube 1, and the first end is electrically connected to the tube wall 11.

[0025] In this solution, the first end of the inductor 2 passes through the tube wall 11 into the conductive tube 1, and then bends and extends to the outside of the opening of the conductive tube 1. The first end is electrically connected to the tube wall 11. The conductive rod on the conductive tube 1 is eliminated, and the bent inductor 2 is connected to the circuit board. Compared with the traditional port form, the cost can be significantly reduced and the reliability problem is avoided.

[0026] Further, the first end includes a penetration section 21 that passes through the cylinder wall 11 and is electrically connected to the cylinder wall 11, and a bent section 22 that is bent and connected to the end of the penetration section 21 and extends outside the opening of the conductive cylinder 1. Specifically, one end of the penetration section 21 located inside the conductive cylinder 1 is bent and connected to the bent section 22, and the connection between the bent section 22 and the penetration section 21 is arc-shaped.

[0027] Furthermore, the penetration section 21 extends in the radial direction of the conductive cylinder 1. Thus, the extension direction of the penetration section 21 passes through the central axis of the conductive cylinder 1. In some embodiments, the penetration section 21 may also deviate from the radial direction, as long as the penetration section 21 passes through the cylinder wall 11 and is electrically connected to the cylinder wall 11.

[0028] Further, the bending section 22 extends in the axial direction of the conductive tube 1. Specifically, the bending section 22 is coaxial with the conductive tube 1. In this way, the bending section 22 can extend from the center of the conductive tube 1 to the outside of the conductive tube 1 and be used to connect with the PCB. The second end of the inductor 2 is the end away from the first end and is used to connect with the main rod. In this way, it can play a role in preventing certain specific frequencies from passing through.

[0029] Furthermore, the cylinder wall 11 is provided with a through opening 111, and the first end is provided at the through opening 111 and welded to the wall surface of the through opening 111. Specifically, in the present embodiment, the through opening 111 is a notch of the cylinder wall 11 located at the opening of the conductive cylinder 1, and the inductor 2 is formed by a bending process. During the processing, the through section 21 of the inductor 2 is positioned at the notch by using a tool, ensuring that the through section 21 is perpendicular to the central axis of the conductive cylinder 1 and located in the radial direction, and the bending section 22 is on the central axis of the conductive cylinder 1, and then the bending section 22 is connected and fixed by soldering. In some embodiments, the first end of the inductor 2 may not be bent first, and after the first end is welded and fixed to the through opening 111 of the cylinder wall 11, the first end is bent to form the bending section 22. In some embodiments, the through opening 111 of the cylinder wall 11 can be set at other positions, for example, the through opening 111 is set at a position close to the opening of the cylinder wall 11, and the through opening 111 is a hole with a closed contour, and then the penetration section 21 passes through the through opening 111 to enter the interior of the conductive cylinder 1.

[0030] Further, the conductive tube 1 is a cylinder formed by a stretching process. In some embodiments, the conductive tube 1 can be a square tube, a regular pentagonal tube, and the like.

[0031] Furthermore, the wave trap further comprises an insulating sleeve 3 wrapped around the outer side of the conductive tube 1 , and the insulating sleeve 3 can be made of plastic material or ceramic material and the like.

[0032] By implementing this solution, there is no need to connect a conductive wire to the center of the conductive tube 1 of the wave trap. The size and shape of the conductive tube 1 can be adaptively adjusted according to the required frequency band, and the size and number of turns of the inductor 2 can also be adaptively adjusted according to product needs.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A notch filter, characterized in that: The invention comprises a conductive tube and an inductor, wherein the conductive tube has a tube wall extending from the bottom to the top, and the inductor is located outside the tube wall; a first end of the inductor passes through the tube wall into the conductive tube, and then bends and extends outside the opening of the conductive tube, and the first end is electrically connected to the tube wall.

2. The wave trap according to claim 1, characterized in that: The first end includes a penetration section passing through the tube wall and electrically connected to the tube wall, and a bending section bent and connected to an end of the penetration section and extending out of the opening of the conductive tube.

3. The wave trap according to claim 2, characterized in that: The penetration section extends in the radial direction of the conductive cylinder.

4. The wave trap according to claim 2, characterized in that: The bent section extends in the axial direction of the conductive tube.

5. The wave trap according to claim 4, characterized in that: The bending section and the conductive tube are coaxial.

6. The wave trap according to claim 1, characterized in that: The cylinder wall is provided with a through opening, and the first end is arranged at the through opening and welded to the wall surface of the through opening.

7. The wave trap according to claim 6, characterized in that: The through opening is a notch of the cylinder wall located at the opening of the conductive cylinder.

8. The wave trap according to claim 1, characterized in that: The conductive cylinder is a cylinder formed by a stretching process.

9. The wave trap according to claim 1, characterized in that: The wave trap further includes an insulating sleeve wrapped around the outer side of the conductive cylinder.

10. The wave trap according to claim 1, characterized in that: The inductor is formed by a bending process.

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