High-suppression band-pass filter

Abstract

The utility model discloses a high suppression band pass filter, relates to the filter field, and comprises a housing and feed joints arranged on two sides of the housing, the housing is internally provided with a plurality of uniformly distributed cylindrical cavities, and the plurality of cylindrical cavities are internally provided with tuning rods in a sliding manner; the upper ends of the plurality of tuning rods extend to the outside of the shell, and the upper ends of the plurality of tuning rods are fixedly provided with the same lifting plate; telescopic adjusting rods connected with the two sides of the lifting plate are fixedly arranged on the two sides of the shell correspondingly. According to the utility model, through the innovative design, the tuning operation is convenient and efficient, the performance adjustment is accurate and stable, the structure is stable and reliable, and the environmental adaptability is good, the problems of tedious tuning, poor performance consistency and the like of a traditional filter are effectively solved, the signal processing capability and stability of a communication system are significantly improved, and the operation and maintenance cost is reduced. The method is suitable for various complex communication scenes.

Description

Technical Field

[0001] This utility model relates to the field of filters, specifically to a high-suppression bandpass filter. Background Technology

[0002] In modern wireless communication and radar technology, bandpass filters play a crucial role. They can filter out signals of the desired frequency band from a large number of frequency signals, while suppressing interference signals of other frequency bands, ensuring the efficient and stable operation of communication and radar systems.

[0003] However, existing bandpass filter tuning cavity structures mostly use screws for adjustment. In practical applications, with the development of communication technology, the performance requirements for filters are constantly increasing, and the number of cavities inside bandpass filters is gradually increasing. For example, in some high-performance communication base station filters, the number of cavities can reach dozens. When the filter needs to be tuned, each cavity requires manual adjustment of a screw, which is cumbersome and extremely labor-intensive. This not only consumes a lot of time, but also makes it difficult to ensure that the adjustment accuracy of each screw is completely consistent, which can easily lead to the accumulation of tuning errors and affect the performance consistency and stability of the filter.

[0004] To address this, a high-suppression bandpass filter is proposed. Utility Model Content

[0005] In view of the problems existing in the above-mentioned bandpass filters, this utility model is proposed.

[0006] Therefore, the purpose of this invention is to provide a high-suppression bandpass filter, which solves the problems raised in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A high-suppression bandpass filter includes a housing and feed terminals disposed on both sides of the housing. The housing has multiple uniformly distributed cylindrical cavities inside, and each of the cylindrical cavities has a tuning rod slidably disposed inside. The upper ends of the multiple tuning rods extend to the outside of the housing, and the upper ends of the multiple tuning rods are fixedly provided with the same lifting plate. Telescopic adjustment rods connected to the two sides of the lifting plate are fixedly provided on both sides of the housing.

[0009] Preferably, the telescopic adjusting rod includes a sleeve, a moving rod, and a positioning bolt. The sleeve is fixedly installed on the side wall of the housing. The lower end of the moving rod is inserted into the inside of the sleeve, and the upper end of the moving rod is fixedly connected to the side wall of the lifting plate. The positioning bolt is threaded onto the wall of the sleeve, and the end of the positioning bolt abuts against the wall of the moving rod.

[0010] Preferably, limiting slide rods are fixedly provided on both sides of the moving rod wall, and the inner wall of the sleeve is provided with limiting slide grooves that cooperate with the limiting slide rods.

[0011] Preferably, a plurality of evenly distributed sliding sleeves are fixedly embedded in the top of the housing, and the wall of the tuning rod slides through the interior of the sliding sleeves.

[0012] Furthermore, the housing is made of nickel-plated aluminum alloy.

[0013] Preferably, the length of the tuning rod is greater than the length of the cylindrical cavity.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0015] 1. This utility model, through the coordinated design of the lifting plate and the telescopic adjusting rod, achieves synchronous adjustment of multiple tuning rods. When it is necessary to adjust the passband characteristics of the filter, the operator only needs to use a simple tool (such as a wrench) to loosen the positioning bolt on the telescopic adjusting rod, and then adjust the length of the telescopic adjusting rod to drive the lifting plate to move up and down, thereby making all tuning rods slide synchronously in the cylindrical cavity, changing the internal space of the cylindrical cavity, and completing the tuning operation. Compared with the traditional method of adjusting screws one by one, it greatly saves time and labor costs and improves tuning efficiency.

[0016] 2. In this utility model, since multiple tuning rods are driven by the same lifting plate, the movement distance of each tuning rod is completely consistent, avoiding the tuning inconsistency problem caused by operational errors when manually adjusting each screw. This enables the filter to achieve more accurate frequency selection and interference suppression throughout the entire passband, improving the consistency and stability of filter performance. Attached Figure Description

[0017] 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a cross-sectional plan view of the present invention;

[0020] Figure 3 For the present utility model Figure 1 A three-dimensional structural diagram of the telescopic adjustment rod;

[0021] Figure 4For the present utility model Figure 3 A three-dimensional structural diagram of the moving rod.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Housing; 2. Power supply connector; 3. Cylindrical cavity; 4. Tuning rod; 5. Lifting plate; 6. Telescopic adjustment rod; 7. Sleeve; 8. Moving rod; 9. Positioning bolt; 10. Limiting slide rod; 11. Sliding sleeve. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] This utility model provides, for example Figure 1-2 The high-suppression bandpass filter shown includes a housing 1 and feed connectors 2 disposed on both sides of the housing 1. The housing 1 is made of nickel-plated aluminum alloy, which has good electromagnetic shielding performance. The nickel plating further enhances its corrosion resistance, ensuring long-term stable operation in harsh environments. The housing 1 contains multiple evenly distributed cylindrical cavities 3. Tuning rods 4 are slidably mounted inside each of the cylindrical cavities 3. The length of the tuning rods 4 is greater than the length of the cylindrical cavity 3. The upper ends of the tuning rods 4 extend to the outside of the housing 1, and a common lifting plate 5 is fixedly mounted on the upper ends of the tuning rods 4. Telescopic adjustment rods 6, connected to the sides of the lifting plate 5, are fixedly mounted on both sides of the housing 1. When it is necessary to adjust the internal space of the cylindrical cavity 3, the height of the lifting plate 5 can be adjusted manually by adjusting the telescopic adjustment rods 6 on both sides. This allows the multiple tuning rods 4 to move within the cylindrical cavities 3, changing the internal space of the cylindrical cavities 3 and completing the tuning operation.

[0026] like Figure 3-4 As shown, the telescopic adjustment rod 6 includes a sleeve 7, a moving rod 8, and a positioning bolt 9. The sleeve 7 is fixedly installed on the side wall of the housing 1. The lower end of the moving rod 8 is inserted into the inside of the sleeve 7, and the upper end of the moving rod 8 is fixedly connected to the side wall of the lifting plate 5. The positioning bolt 9 is threaded on the tube wall of the sleeve 7, and the end of the positioning bolt 9 abuts against the rod wall of the moving rod 8. When it is necessary to adjust the telescopic length of the moving rod 8, the positioning bolt 9 is loosened manually with a wrench to allow the moving rod 8 to move inside the sleeve 7. Then, the positioning bolt 9 is tightened to fix the sleeve 7 and the moving rod 8. Limiting slide rods 10 are fixedly provided on both sides of the rod wall of the moving rod 8. The inner wall of the sleeve 7 is provided with a limiting slide groove that cooperates with the limiting slide rod 10. The limiting slide rod 10 can limit the distance that the moving rod 8 can move inside the sleeve 7, preventing the moving rod 8 from moving out of the inside of the sleeve 7.

[0027] like Figure 2As shown, a plurality of evenly distributed sliding sleeves 11 are fixedly embedded in the top of the housing 1. The wall of the tuning rod 4 slides through the interior of the sliding sleeve 11. During the movement of the tuning rod 4, the sliding sleeve 11 can increase the stability of the movement of the tuning rod 4.

[0028] The foregoing description only illustrates certain exemplary embodiments of the present invention. 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 above 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. A high-rejection bandpass filter comprising a housing (1) and feed terminals (2) arranged on both sides of the housing (1), characterized in that: The inside of the shell (1) is provided with a plurality of uniformly distributed cylindrical cavities (3), the inside of the plurality of cylindrical cavities (3) is slidably provided with tuning rods (4); The upper ends of the plurality of tuning rods (4) extend to the outside of the shell (1), and the upper ends of the plurality of tuning rods (4) are fixedly provided with the same lifting plate (5); Both sides of the shell (1) are fixedly provided with telescopic adjusting rods (6) connected to both sides of the lifting plate (5).

2. The high-rejection bandpass filter of claim 1, wherein: The telescopic adjusting rod (6) comprises a sleeve (7), a moving rod (8) and a positioning bolt (9), the sleeve (7) is fixedly arranged on the side wall of the shell (1), the lower end of the moving rod (8) is inserted into the inside of the sleeve (7), and the upper end of the moving rod (8) is fixedly connected with the side wall of the lifting plate (5), the positioning bolt (9) is threadedly arranged on the wall of the sleeve (7), and the end of the positioning bolt (9) is arranged in abutment with the rod wall of the moving rod (8).

3. The high-rejection bandpass filter of claim 2, wherein: The rod wall of the moving rod (8) is fixedly provided with limiting sliding rods (10) on both sides, and the inner wall of the sleeve (7) is provided with limiting sliding grooves matched with the limiting sliding rods (10).

4. The high-rejection bandpass filter of claim 1, wherein: The top of the shell (1) is fixedly embedded with a plurality of uniformly distributed sliding sleeves (11), and the rod wall of the tuning rod (4) slides through the inside of the sliding sleeve (11).

5. The high-rejection bandpass filter of claim 1, wherein: The shell (1) is made of nickel-plated aluminum alloy shell.

6. The high-rejection bandpass filter of claim 1, wherein: The length of the tuning rod (4) is greater than the length of the cylindrical cavity (3).

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