Folding waveguide filter

Abstract

The utility model provides a folding type waveguide filter, which relates to the technical field of filters, and comprises an upper cover plate and a lower shell which are fixed through bolts, a partition plate is embedded in the lower shell, one end of the partition plate protrudes, the protruding end and the lower shell form a notch, a plurality of isolation frames integrally formed with the lower shell are arranged in a resonant cavity at intervals, and the upper cover plate and the lower shell are fixed through bolts. Connecting cavity openings are formed in the two ends of every two adjacent isolation frames in a staggered mode, blocking pieces are arranged on the sides, away from the notches, of the connecting cavity openings in the isolation frames, and the blocking pieces and the output end of a motor installed in the lower shell are installed through a transmission mechanism. The transmission mechanism is driven by the motor to drive the blocking piece to move in the connecting cavity opening in parallel, so that the distance between the connecting cavity openings is adjusted, the frequency response characteristic of the resonant cavity can be adjusted to a certain extent, and the high requirement of a modern communication system for the performance of a filter is met. Particularly, the adaptability to different application scenes and frequency requirements is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter technical field especially relates to a folding waveguide filter. BACKGROUND

[0002] The existing waveguide filter, its structure is mostly single, usually only contains one or several fixed resonant cavity, the size and shape of these resonant cavities cannot be changed after manufacturing is completed, therefore the frequency response characteristic of filter is also fixed, along with the rapid development of modern communication technology, the performance requirement of communication system to filter is higher and higher, not only requires that filter has high precision and high stability, but also requires that it can adapt to a plurality of different application scenes and frequency demand, however the traditional fixed structure waveguide filter obviously cannot satisfy this demand, because once the frequency response characteristic of filter is determined, it is difficult to adjust it again to adapt to different working environment or frequency requirement, therefore, we propose a folding waveguide filter. SUMMARY

[0003] The utility model discloses a kind of folding waveguide filters, including bolt-fixed upper cover plate and lower shell, upper cover plate and lower shell between being equipped with baffle, lower shell and baffle form resonant cavity, baffle is embeddedly installed on lower shell and one end is protruding, protruding end and lower shell form gap, several isolation racks are formed integrally with lower shell in resonant cavity, and the both ends of adjacent isolation racks are staggered and provided with connecting cavity, and blocking piece is provided in isolation rack away from gap side in connecting cavity, and blocking piece is installed by transmission mechanism with motor output end installed in lower shell, parallel displacement is driven in connecting cavity by motor positive and negative operation to blocking piece, and then adjust the size of connecting cavity spacing.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] A kind of folding waveguide filter, including bolt-fixed upper cover plate and lower shell, upper cover plate and lower shell between being equipped with baffle, lower shell and baffle form resonant cavity, baffle is embeddedly installed on lower shell and one end is protruding, protruding end and lower shell form gap, several isolation racks are formed integrally with lower shell in resonant cavity, and the both ends of adjacent isolation racks are staggered and provided with connecting cavity, and blocking piece is provided in isolation rack away from gap side in connecting cavity, and blocking piece is installed by transmission mechanism with motor output end installed in lower shell, parallel displacement is driven in connecting cavity by motor positive and negative operation to blocking piece, and then adjust the size of connecting cavity spacing.

[0006] Further, the top of the upper cover plate is provided with an input and an output connector on both sides corresponding to the gap.

[0007] Further, the two outer isolation racks are connected by the connecting cavity to form a resonant path.

[0008] Further, the input and output connectors are connected by the resonant path.

[0009] Further, the partition plate is provided with a resonant column and a tuning screw in the lower shell correspondingly, the resonant column is integrally formed in the resonant cavity, and the tuning screw passes through one end of the partition plate and is located at the top end of the partition plate and extends into the resonant column.

[0010] Further, the transmission mechanism comprises a driving gear and a rack, the driving gear is arranged on the output end of the motor, is engaged with the rack, and the rack is arranged along the direction of the blocking piece, and the rack is fixedly connected with the blocking piece at the end away from the driving gear.

[0011] Further, the rack and the bottom of the blocking piece are slidingly connected in the sliding groove.

[0012] Further, the bottom of the partition plate is integrally provided with a protruding portion corresponding to the connecting cavity, and the height of the protruding portion is added to the height of the blocking piece and the height of the connecting cavity.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] The motor drives the transmission mechanism to drive the blocking piece to move in parallel in the connecting cavity, so that the spacing of the connecting cavity is adjusted, the frequency response characteristic of the resonant cavity can be adjusted to a certain extent, the high requirement of the modern communication system on the filter performance is met, and the adaptability to different application scenarios and frequency requirements is particularly high. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The utility model provides a whole structure schematic diagram of a folding waveguide filter;

[0016] Figure 2 The utility model provides a partition plate mounting structure schematic diagram of a folding waveguide filter;

[0017] Figure 3 The utility model provides a lower shell structure schematic diagram of a folding waveguide filter;

[0018] Figure 4 The utility model provides a transmission mechanism structure schematic diagram of a folding waveguide filter;

[0019] Figure 5 The utility model provides a partition plate side view plan of a folding waveguide filter.

[0020] Legend: 1. Top cover plate; 2. Lower shell; 3. Partition plate; 31. Protrusion; 4. Resonant cavity; 5. Notch; 6. Isolation frame; 7. Connecting cavity opening; 71. Resonance path; 8. Blocking component; 9. Transmission mechanism; 91. Drive gear; 92. Rack; 10. Motor; 11. Output connector; 12. Resonant column; 13. Tuning screw; 14. Sliding groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] Example 1:

[0026] like Figures 1-5 As shown, this utility model provides a technical solution: a folded waveguide filter, including an upper cover plate 1 and a lower housing 2 fixed by bolts, a partition plate 3 is provided between the upper cover plate 1 and the lower housing 2, the lower housing 2 and the partition plate 3 form a resonant cavity 4, the partition plate 3 is embedded in the lower housing 2 and one end protrudes, the protruding end and the lower housing 2 form a notch 5, the notch 5 serves as a channel for connecting the input and output connectors 11 and the resonant path 71;

[0027] A plurality of isolation racks 6 are spaced in the resonant cavity 4 and integrally formed with the lower shell 2. Connection cavities 7 are staggered at both ends of adjacent isolation racks 6. The connection cavities 7 are provided with blocking pieces 8 inside the isolation racks 6 away from the notches 5. The blocking pieces 8 are installed through a transmission mechanism 9 and an output end of a motor 10 installed in the lower shell 2. The motor 10 is installed in a sealed cover in the lower shell 2. The motor 10 drives the blocking pieces 8 to move in parallel in the connection cavities 7 through forward and reverse operation, thereby adjusting the distance between the connection cavities 7 to change the reflection and transmission characteristics of the waveguide signal and realize the filtering function.

[0028] Embodiment 2:

[0029] As shown in Figures 1-5 The top ends of the upper cover plate 1 are provided with input and output connectors 11 corresponding to the notches 5. The input and output connectors 11 are waveguide flange coaxial connectors. The resonant path 71 is formed between the two outer isolation racks 6 through the connection cavities 7. The input and output connectors 11 are connected through the resonant path 71.

[0030] It should be noted that the input and output connectors 11 are located in the inner end of the upper cover plate 1 and can seal the notches 5.

[0031] The resonant column 12 and the tuning screw 13 are installed in the lower shell 2 corresponding to the partition plate 3. The resonant column 12 is integrally formed in the resonant cavity 4. The resonant column 12 (also known as resonant rod, vibrator, reflection rod, etc.) is one of the key elements of the cavity filter. It produces resonant frequency together with the closed metal cavity, thereby realizing the required frequency of the filter. The tuning screw 13 passes through the mounting hole of the cover plate. One end of the tuning screw 13 passes through the partition plate 3 and is located at the top end of the partition plate 3, and the other end extends into the resonant column 12. By adjusting the length of the tuning screw 13 inserted into the resonant column 12, the resonant frequency of the cavity can be changed, thereby achieving the purpose of tuning.

[0032] In addition, it is worth noting that the design of the resonant column 12 and the tuning screw 13 in the filter may vary depending on different filter types and design schemes, including but not limited to installation position, number or size, etc.

[0033] The transmission mechanism 9 comprises a driving gear 91 and a rack 92, the driving gear 91 is installed at the output end of the motor 10, is engaged with the rack 92, the rack 92 is arranged along the direction of the blocking piece 8, and the end of the rack 92 away from the driving gear 91 is fixedly connected with the blocking piece 8; when the motor 10 is started, the output end drives the driving gear 91 to rotate, and since the driving gear 91 is engaged with the rack 92, the rotation of the driving gear 91 is converted into the linear motion of the rack 92, the rack 92 moves along the length direction and drives the blocking piece 8 fixedly connected therewith to move, so that the moving direction of the blocking piece 8 in the connecting cavity 7 can be controlled by adjusting the rotating direction of the motor 10, thereby realizing the accurate adjustment of the spacing of the connecting cavity 7.

[0034] In order to ensure the stability of the rack 92 driving the blocking piece 8 during displacement, the rack 92 and the bottom of the blocking piece 8 are slidingly connected in the sliding groove 14, the sliding groove 14 is arranged along the direction of the blocking piece 8, and the sliding groove 14 is further matched with the sliding to provide the moving guide.

[0035] Based on the above embodiment, in order to avoid the gap between the blocking piece 8 and the partition plate 3, the bottom of the partition plate 3 is integrally provided with a protruding portion 31 corresponding to the connecting cavity 7, and the height of the protruding portion 31 is added to the height of the blocking piece 8 and the height of the connecting cavity 7.

[0036] In summary, when the folding waveguide filter is used, the motor 10 is started, the blocking piece 8 is driven to move in parallel in the connecting cavity 7 by the transmission mechanism 9, so as to adjust the spacing of the connecting cavity 7, and thus the frequency response characteristics of the filter can be flexibly adjusted according to the specific application scene and frequency requirements.

[0037] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A folded waveguide filter comprising a bolted upper cover plate (1) and a lower housing (2), between which a partition (3) is provided, the lower housing (2) and the partition (3) forming a resonant cavity (4), characterized in that: The baffle (3) is embedded on the lower shell (2) and protrudes at one end, the protruding end forms a gap (5) with the lower shell (2), the resonant cavity (4) is spaced by a plurality of isolation racks (6) integrally formed with the lower shell (2), the ends of adjacent isolation racks (6) are staggered to form a connecting cavity (7), the connecting cavity (7) is provided with a blocking piece (8) inside the isolation rack (6) away from the gap (5), the blocking piece (8) is installed on the output end of the motor (10) installed in the lower shell (2) through the transmission mechanism (9), the motor (10) is driven to move the blocking piece (8) in the connecting cavity (7) parallelly, thereby adjusting the distance between the connecting cavities (7).

2. The folded waveguide filter of claim 1, wherein: The top of the upper cover plate (1) is provided with input and output connectors (11) on both sides corresponding to the gap (5).

3. The folded waveguide filter of claim 2, wherein: The connecting cavities (7) between the two outer isolation racks (6) form a resonant path (71).

4. The folded waveguide filter of claim 3, wherein: The input and output connectors (11) are connected through the resonant path (71).

5. The folded waveguide filter of claim 1, wherein: The baffle (3) and the lower shell (2) are provided with a resonant column (12) and a tuning screw (13) corresponding to the installation, the resonant column (12) is integrally formed in the resonant cavity (4), and the tuning screw (13) passes through one end of the baffle (3) and is located at the top of the baffle (3), and the other end extends into the resonant column (12).

6. The folded waveguide filter of claim 1, wherein: The transmission mechanism (9) includes a drive gear (91) and a rack (92), the drive gear (91) is installed on the output end of the motor (10), and is engaged with the rack (92), the rack (92) is arranged along the direction of the blocking piece (8), and the end of the rack (92) away from the drive gear (91) is fixedly connected with the blocking piece (8).

7. The folded waveguide filter of claim 6, wherein: The rack (92) and the blocking piece (8) are slidably connected at the bottom of the sliding groove (14), and the sliding groove (14) is arranged along the direction of the blocking piece (8).

8. The folded waveguide filter of claim 1, wherein: The bottom of the baffle (3) is integrally provided with a protruding portion (31) corresponding to the connecting cavity (7), and the height of the protruding portion (31) is added to the height of the blocking piece (8) and the height of the connecting cavity (7).

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