An L-band high-pass filter

Abstract

The application relates to the technical field of high-pass filters, in particular to an L-band high-pass filter which comprises a shell, a sealing structure, a heat dissipation structure, a filtering structure, a resisting structure, a fixing structure, a positioning structure, a filter body, a protective cover and a mounting hole. The filter body is placed in the shell and shielded and protected by the sealing structure, so that the filter body can be effectively prevented from being damaged by impact. The filter can be fixed on the shell through the fixing structure cooperating with the positioning structure, and the filter body can be quickly disassembled, so that the filter body can be conveniently overhauled and maintained. The filter body can be heat-dissipated through the heat dissipation structure. Dust can be prevented from entering the shell in the heat-dissipation process through the filtering structure. The filtering structure can be resisted through the resisting structure. The shell can be mounted through the mounting hole. The joint can be shielded and protected through the protective cover, so that the wire joint can be prevented from being damaged by impact.

Description

Technical Field

[0001] This invention relates to the field of high-pass filter technology, specifically an L-band high-pass filter. Background Technology

[0002] A high-pass filter, also known as a low-cutoff filter or low-impedance filter, is a combination of capacitors, inductors, and resistors that allows signal components above a certain frequency to pass through while greatly suppressing signal components below that frequency. Its characteristics can be described in the time domain and frequency domain by impulse response and frequency response, respectively. In practical applications, high-pass filters mainly include L-band and I-band filters.

[0003] However, traditional high-pass filters are directly exposed to the air after installation, making them susceptible to damage from impacts and dust interference. They also generate a lot of heat, leading to frequent shutdowns. Furthermore, they are directly fixed with multiple bolts, requiring a wrench to unscrew them for disassembly when damage occurs, resulting in low maintenance efficiency. Summary of the Invention

[0004] To address the problems in the prior art, this invention provides an L-band high-pass filter.

[0005] The technical solution adopted by this invention to solve its technical problem is: an L-band high-pass filter, including a housing, a filter body fixed inside the housing by a fixing structure, multiple positioning structures on the housing, a filtering structure on the housing, a blocking structure on the filtering structure, a sealing structure on the housing, a heat dissipation structure on the sealing structure, a protective cover on the housing, and multiple mounting holes on the housing.

[0006] The fixing structure includes a slide bar, two slide bars are slidably connected to the outer casing, the slide bars abut against the filter body, a rotating shaft is rotatably connected to the outer casing, a take-up roller is fixedly connected to the rotating shaft, a torsion spring is fixedly connected between the rotating shaft and the outer casing, two pull ropes are fixedly connected to the take-up roller, one end of the pull rope is fixedly connected to the take-up roller and the other end is fixedly connected to the slide bar, and a fourth return spring is fixedly connected between the slide bar and the outer casing.

[0007] Specifically, the two pull ropes are wound in opposite directions on the take-up roller, and the two slide bars are symmetrically distributed about the middle of the pivot.

[0008] Specifically, a pull rod is fixedly connected to the slide rod, and one end of the slide rod cross-section has an L-shaped structure.

[0009] Specifically, the positioning structure includes positioning blocks, and multiple positioning blocks are fixedly connected to the outer shell. The multiple positioning blocks are engaged with the filter body, and a retaining ring is slidably connected to the positioning block. The retaining ring abuts against the filter body.

[0010] Specifically, a third return spring is sleeved on the outside of the positioning block. One end of the third return spring abuts against the retaining ring, and the other end of the third return spring abuts against the outer shell. One end of the cross-section of the positioning block has a trapezoidal structure.

[0011] Specifically, the sealing structure includes a sealing cover, which is rotatably connected to the outer shell. Two bolts are threaded onto the sealing cover, and the bolts abut against a locking block. The locking block abuts against the outer shell. The outer shell has two second grooves, and one end of the locking block is located inside the second groove. The locking block has a first groove, and one end of the bolt is located inside the first groove. A first return spring abuts between the locking block and the sealing cover. A first sealing gasket is engaged on the outer shell, and the first sealing gasket abuts against the sealing cover.

[0012] Specifically, one end of the card block cross-section has a triangular structure, the cross-section of the second groove has a triangular structure, and one end of the cross-section of the first groove has a triangular structure.

[0013] Specifically, the heat dissipation structure includes a fan, the fan is installed on the sealing cover, the sealing cover is provided with a first vent, the first vent is connected to the fan, and the outer casing is provided with a second vent.

[0014] Specifically, the filter structure includes a fixed frame, which is fixedly connected to the outer shell. An outer frame is snapped onto the fixed frame, and a filter screen is fixedly connected to the outer frame. The fixed frame has two openings, and a second sealing gasket is snapped onto the fixed frame, with the second sealing gasket abutting against the outer frame.

[0015] Specifically, the blocking structure includes a stop bar, a stop bar slidably connected to the fixed frame, a pressure block slidably connected to the stop bar, the pressure block abutting against the outer frame, a pressure spring fixedly connected between the pressure block and the stop bar, a slider slidably connected to the stop bar, the slider engaging with the fixed frame, and a second return spring abutting against the slider and the stop bar.

[0016] The beneficial effects of this invention are:

[0017] (1) The L-band high-pass filter of the present invention first installs the outer shell through multiple mounting holes when installing the filter body. Then, the filter body is installed inside the outer shell through a fixing structure and a positioning structure. The outer shell can be sealed by a sealing structure. The outer shell and the sealing structure can shield and protect the filter body, thereby effectively preventing the filter body from being damaged by impact. When the filter body is damaged, the filter body can be quickly disassembled by pushing the fixing structure, which facilitates the inspection and maintenance of the filter body. That is: first, the outer shell is installed through multiple mounting holes. After the outer shell is installed, the filter body is placed inside the outer shell and the through hole on the filter body is aligned with the end of the positioning block. The positioning block is inserted into the through hole on the filter body. During the movement of the filter body, it will abut against the movement of the retaining ring. The third return spring retracts. When the top of the retaining ring is flush with the outer shell, the shaft rotates under the action of the torsion spring, thereby driving the two sliding rods towards the filter body through the two pull ropes. This causes the two sliding rods to abut against and fix the filter body, thereby realizing the quick installation of the filter body. After the installation is completed, the third return spring... The filter body and the two sliding rods are pressed together, preventing the filter body from moving after installation and improving stability. After installation, the filter body is sealed with a sealing cover, which protects the filter body from impact damage. When the filter body needs to be disassembled, the screw is turned, and the end of the screw moves away from the locking block. At this time, the locking block moves away from the second groove under the action of the first return spring. When the end of the locking block is completely disengaged from the second groove, the other screw is turned to disengage the other locking block from the other second groove. Then the sealing cover can be rotated so that it does not block the filter body. Then, one of the pull rods pulls one of the sliding rods. One of the sliding rods drives the winding roller to rotate through a pull rope. The rotation of the winding roller causes the other sliding rod to move away from the filter body under the action of the fourth return spring. When neither of the sliding rods is in contact with the filter body, the filter body can be removed from the inside of the housing. Thus, when the filter body is damaged and needs repair, it can be quickly disassembled, improving the efficiency of filter body repair and maintenance.

[0018] (2) The L-band high-pass filter described in this invention can dissipate the heat generated by the filter body in a timely manner through a heat dissipation structure, thereby effectively avoiding downtime and improving the stability of use. The filtration structure can filter the gas entering the housing, thereby effectively preventing dust in the air from entering the housing and adhering to the surface of the filter body, ensuring the cleanliness of the filter body surface and preventing it from being interfered with by dust. The blocking structure can block the filter structure and facilitate the disassembly of the filter structure, thereby facilitating the cleaning of the filter structure and ensuring filtration efficiency. Specifically, the operation of the fan can dissipate the heat generated by the filter body in a timely manner, thereby avoiding downtime and improving the stability of use. During the operation of the fan, air enters the housing through the filter screen and the second vent in sequence. During the process of entering the housing, dust in the air is filtered by the filter screen, effectively preventing dust from entering the housing and adhering to the surface of the filter body, thus ensuring the cleanliness of the filter body surface. When it is necessary to disassemble the filter screen, press the slider, the second return spring retracts, and when the slider is no longer locked to the fixed frame, the stop bar can be removed from the fixed frame. After both stop bars are removed from the fixed frame, the outer frame and filter screen can be removed from the fixed frame, which facilitates the cleaning of the filter screen and ensures filtration efficiency. The two openings make it easy to remove the outer frame and filter screen. After cleaning, the outer frame and filter screen are placed inside the fixed frame, and the two stop bars are used to hold the outer frame in place. At this time, the pressure spring is in a compressed state, so it applies pressure to the outer frame through the pressure block, thereby pressing the outer frame and the fixed frame tightly together and improving the sealing performance. Attached Figure Description

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

[0020] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of an L-band high-pass filter provided by the present invention;

[0021] Figure 2 for Figure 1 The diagram shown is an enlarged view of the structure of part A.

[0022] Figure 3 This is a schematic diagram of the connection structure between the outer shell and the sealing cap of the present invention;

[0023] Figure 4 for Figure 3 The diagram shown is an enlarged view of the structure of section B.

[0024] Figure 5 for Figure 3 The diagram shows an enlarged view of section C.

[0025] Figure 6 for Figure 3 The diagram shown is an enlarged view of the structure of part D.

[0026] Figure 7 This is a schematic diagram of the connection structure between the fixed frame and the outer frame of the present invention;

[0027] Figure 8 for Figure 7 The diagram shows an enlarged view of the E-section structure.

[0028] In the diagram: 1. Outer shell; 2. Sealing structure; 201. Sealing cover; 202. Bolt; 203. Clamp; 204. First return spring; 205. First groove; 206. Second groove; 207. First sealing gasket; 3. Heat dissipation structure; 301. Fan; 302. First vent; 303. Second vent; 4. Filter structure; 401. Fixing frame; 402. Outer frame; 403. Filter screen; 404. Opening; 405. First sealing gasket; 5. Barrier Structure; 501, stop bar; 502, pressure block; 503, pressure spring; 504, slider; 505, second return spring; 6, fixing structure; 601, pull rod; 602, slide rod; 603, pull rope; 604, take-up roller; 605, rotating shaft; 606, torsion spring; 607, fourth return spring; 7, positioning structure; 701, positioning block; 702, retaining ring; 703, third return spring; 8, filter body; 9, protective cover; 10, mounting hole. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0030] like Figure 1-8 As shown, the L-band high-pass filter of the present invention includes a housing 1, a filter body 8 fixed inside the housing 1 by a fixing structure 6, a plurality of positioning structures 7 on the housing 1, a filtering structure 4 on the housing 1, a blocking structure 5 on the filtering structure 4, a sealing structure 2 on the housing 1, a heat dissipation structure 3 on the sealing structure 2, a protective cover 9 on the housing 1, and a plurality of mounting holes 10 on the housing 1.

[0031] Specifically, the fixing structure 6 includes a slide rod 602. Two slide rods 602 are slidably connected to the outer casing 1. The slide rods 602 abut against the filter body 8. A rotating shaft 605 is rotatably connected to the outer casing 1. A take-up roller 604 is fixedly connected to the rotating shaft 605. A torsion spring 606 is fixedly connected between the rotating shaft 605 and the outer casing 1. Two pull ropes 603 are fixedly connected to the take-up roller 604. One end of each pull rope 603 is fixedly connected to the take-up roller 604, and the other end is fixedly connected to the slide rod 602. A fourth return spring 607 is fixedly connected between the slide rod 602 and the outer casing 1. The two pull ropes 603 are wound in opposite directions on the take-up roller 604. The two slide rods 602 are about the rotating shaft 602. The components 5 are symmetrically distributed in the middle. A pull rod 601 is fixedly connected to the slide rod 602. One end of the slide rod 602 has an L-shaped structure. The positioning structure 7 includes a positioning block 701. Multiple positioning blocks 701 are fixedly connected to the outer shell 1. The multiple positioning blocks 701 are engaged with the filter body 8. A retaining ring 702 is slidably connected to the positioning block 701. The retaining ring 702 abuts against the filter body 8. A third return spring 703 is sleeved on the outside of the positioning block 701. One end of the third return spring 703 abuts against the retaining ring 702, and the other end of the third return spring 703 abuts against the outer shell 1. One end of the positioning block 701 has a trapezoidal structure. The sealing structure 2 includes a sealing cover 2. 01, A sealing cover 201 is rotatably connected to the outer shell 1. Two bolts 202 are threaded onto the sealing cover 201. The bolts 202 abut against a locking block 203. The locking block 203 abuts against the outer shell 1. The outer shell 1 has two second grooves 206. One end of the locking block 203 is located inside the second groove 206. The locking block 203 has a first groove 205. One end of the bolts 202 is located inside the first groove 205. A first return spring 204 abuts between the locking block 203 and the sealing cover 201. A first sealing gasket 207 is engaged on the outer shell 1. The first sealing gasket 207 abuts against the sealing cover 201. One end of the cross-section of the locking block 203 has a triangular structure. The cross-section of the second groove 206 is triangular, and one end of the cross-section of the first groove 205 is triangular. When installing the filter body 8, the outer casing 1 is first installed through multiple mounting holes 10. After the outer casing 1 is installed, the filter body 8 is placed inside the outer casing 1, and the through hole on the filter body 8 is aligned with the end of the positioning block 701. The positioning block 701 is then inserted into the through hole on the filter body 8. During the movement of the filter body 8, it will abut against the retaining ring 702, causing the third return spring 703 to contract. When the top of the retaining ring 702 is flush with the outer casing 1, the rotating shaft 605 rotates under the action of the torsion spring 606, thereby driving the two sliding rods 602 towards the filter body 8 via the two pull ropes 603.This causes the two sliding rods 602 to abut and fix the filter body 8, thus achieving rapid installation of the filter body 8. After installation, the filter body 8 and the two sliding rods 602 are pressed together under the action of the third return spring 703, thus preventing the filter body 8 from moving after installation and improving stability. After installation, the filter body 8 is sealed by the sealing cover 201, so that the filter body 8 can be shielded and protected by the outer shell 1 and the sealing cover 201, effectively preventing the filter body 8 from being damaged by impact. When it is necessary to disassemble the filter body 8, the bolt 202 is rotated, and the end of the bolt 202 moves away from the locking block 203. At this time, under the action of the first return spring 204, the locking block 203 moves away from the second groove 206. When the end of the locking block 203 moves away from the second groove 206... When the filter body 8 is completely disengaged from the second groove 206, rotating another bolt 202 causes another locking block 203 to disengage from the other second groove 206. At this point, the sealing cover 201 can be rotated to prevent it from obstructing the filter body 8. Then, one of the pull rods 601 pulls one of the slide rods 602. One slide rod 602, via a pull rope 603, drives the take-up roller 604 to rotate. As the take-up roller 604 rotates, the other slide rod 602 moves away from the filter body 8 under the action of the fourth return spring 607 connected to it. When neither slide rod 602 is in contact with the filter body 8, the filter body 8 can be removed from the inside of the outer casing 1. This allows for quick disassembly when the filter body 8 is damaged and requires repair, improving the efficiency of filter body 8 maintenance.

[0032] Specifically, the heat dissipation structure 3 includes a fan 301, which is mounted on the sealing cover 201. The sealing cover 201 has a first ventilation opening 302, which is connected to the fan 301. The outer shell 1 has a second ventilation opening 303. The filter structure 4 includes a fixing frame 401, which is fixedly connected to the outer shell 1. An outer frame 402 is engaged with the fixing frame 401, and a filter screen 403 is fixedly connected to the outer frame 402. The fixing frame 401 has two openings 404, and a second sealing gasket 405 is engaged with the fixing frame 401. The second sealing gasket 405 abuts against... The blocking structure 5, which contacts the outer frame 402, includes a stop bar 501. The stop bar 501 is slidably connected to the fixed frame 401, and a pressure block 502 is slidably connected to the stop bar 501. The pressure block 502 abuts against the outer frame 402. A pressure spring 503 is fixedly connected between the pressure block 502 and the stop bar 501. A slider 504 is slidably connected to the stop bar 501 and engages with the fixed frame 401. A second return spring 505 abuts against the slider 504 and the stop bar 501. In other words, the operation of the fan 301 allows the heat generated by the filter body 8 to be dissipated in a timely manner, thereby preventing system failure. This improves the stability of use. During the operation of the fan 301, air enters the interior of the housing 1 through the filter screen 403 and the second vent 303. Dust in the air is filtered by the filter screen 403 during this process, effectively preventing dust from entering the interior of the housing 1 and adhering to the surface of the filter body 8, thus ensuring the cleanliness of the filter body 8 surface. When the filter screen 403 needs to be disassembled, pressing the slider 504 retracts the second return spring 505. When the slider 504 is no longer engaged with the fixed frame 401, the baffle 501 can be removed from the fixed frame 401. After 501 is removed from the fixed frame 401, the outer frame 402 and filter screen 403 can be removed from the fixed frame 401, which facilitates the cleaning of the filter screen 403 and ensures the filtration efficiency. The two openings 404 make it easy to remove the outer frame 402 and filter screen 403. After cleaning, the outer frame 402 and filter screen 403 are placed inside the fixed frame 401, and the two baffles 501 are used to block and fix the outer frame 402. At this time, the pressure spring 503 is in a compressed state, so it will apply pressure to the outer frame 402 through the pressure block 502, thereby pressing the outer frame 402 and the fixed frame 401 together, thus improving the sealing performance.

[0033] In use, when installing the filter body 8, the outer shell 1 is first installed through multiple mounting holes 10. After the outer shell 1 is installed, the filter body 8 is placed inside the outer shell 1 and the through hole on the filter body 8 is aligned with the end of the positioning block 701. The positioning block 701 is then inserted into the through hole on the filter body 8. During the movement of the filter body 8, it will abut against the movement of the retaining ring 702, and the third return spring 703 will retract. When the top of the retaining ring 702 is flush with the outer shell 1, the rotating shaft 605 rotates under the action of the torsion spring 606, thereby driving the two sliding rods 602 to move toward the filter body 8 through the two pull ropes 603. This causes the two sliding rods 602 to abut against and fix the filter body 8, thus realizing the rapid installation of the filter body 8. After installation, the filter body 8 and the two sliding rods 602 are pressed together under the action of the third return spring 703, thereby preventing the filter body 8 from moving after installation and improving stability.

[0034] After installation, the filter body 8 is sealed with the sealing cover 201. The outer casing 1 and the sealing cover 201 provide protection for the filter body 8, effectively preventing damage from impacts. The operation of the fan 301 allows the heat generated by the filter body 8 to be dissipated promptly, preventing downtime and improving operational stability. During the operation of the fan 301, air enters the interior of the outer casing 1 through the filter screen 403 and the second vent 303. Dust in the air is filtered by the filter screen 403 during this process, effectively preventing dust from entering the interior of the outer casing 1 and causing contamination. The filter body 8 is secured to the surface, ensuring its cleanliness. When the filter screen 403 needs to be disassembled, pressing the slider 504 retracts the second return spring 505. When the slider 504 is no longer engaged with the fixed frame 401, the stop bar 501 can be removed from the fixed frame 401. After both stop bars 501 are removed from the fixed frame 401, the outer frame 402 and filter screen 403 can be removed, facilitating cleaning of the filter screen 403 and ensuring filtration efficiency. The two openings 404 allow for easy removal of the outer frame 402 and filter screen 403. After cleaning, the outer frame 402 and filter screen 403 are placed back into place. Inside the fixed frame 401, the outer frame 402 is fixed by two stop bars 501. At this time, the pressure spring 503 is in a compressed state, so it will apply pressure to the outer frame 402 through the pressure block 502, thereby pressing the outer frame 402 and the fixed frame 401 together, thus improving the sealing performance. When it is necessary to disassemble the filter body 8, the bolt 202 is rotated, and the end of the bolt 202 moves away from the locking block 203. At this time, under the action of the first return spring 204, the locking block 203 moves away from the second groove 206. When the end of the locking block 203 is completely disengaged from the second groove 206, the other bolt 202 is rotated to make the other locking block 203 also move from the other second groove 206. The filter body 8 is disengaged from the groove 206. At this point, the sealing cover 201 can be rotated so that it does not obstruct the filter body 8. Then, one of the pull rods 601 pulls one of the slide rods 602. One of the slide rods 602 drives the take-up roller 604 to rotate through one of the pull ropes 603. When the take-up roller 604 rotates, the other slide rod 602 moves away from the filter body 8 under the action of the fourth return spring 607 connected to it. When neither of the two slide rods 602 is in contact with the filter body 8, the filter body 8 can be removed from the inside of the outer casing 1. Thus, when the filter body 8 is damaged and needs to be repaired, it can be quickly disassembled, improving the efficiency of the filter body 8 repair and maintenance.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An L-band high-pass filter, characterized in that, The device includes an outer shell (1), inside which a filter body (8) is fixed by a fixing structure (6). The outer shell (1) is provided with multiple positioning structures (7), a filter structure (4) is provided on the outer shell (1), a blocking structure (5) is provided on the filter structure (4), a sealing structure (2) is provided on the outer shell (1), a heat dissipation structure (3) is provided on the sealing structure (2), a protective cover (9) is provided on the outer shell (1), and multiple mounting holes (10) are provided on the outer shell (1). The fixed structure (6) includes a slide rod (602). Two slide rods (602) are slidably connected to the outer shell (1). The slide rods (602) abut against the filter body (8). A rotating shaft (605) is rotatably connected to the outer shell (1). A take-up roller (604) is fixedly connected to the rotating shaft (605). A torsion spring (606) is fixedly connected between the rotating shaft (605) and the outer shell (1). Two pull ropes (603) are fixedly connected to the take-up roller (604). One end of the pull rope (603) is fixedly connected to the take-up roller (604) and the other end is fixedly connected to the slide rod (602). A fourth return spring (607) is fixedly connected between the slide rod (602) and the outer shell (1). The two pull ropes (603) are wound in opposite directions on the take-up roller (604), and the two slide rods (602) are symmetrically distributed about the middle of the pivot (605); a pull rod (601) is fixedly connected to the slide rod (602), and one end of the slide rod (602) has an L-shaped structure. The positioning structure (7) includes a positioning block (701). Multiple positioning blocks (701) are fixedly connected to the outer shell (1). The multiple positioning blocks (701) are engaged with the filter body (8). A retaining ring (702) is slidably connected to the positioning block (701). The retaining ring (702) abuts against the filter body (8). A third reset spring (703) is sleeved on the outside of the positioning block (701). One end of the third reset spring (703) abuts against the retaining ring (702), and the other end of the third reset spring (703) abuts against the outer shell (1). One end of the cross section of the positioning block (701) is trapezoidal.

2. The L-band high-pass filter according to claim 1, characterized in that: The sealing structure (2) includes a sealing cover (201), which is rotatably connected to the outer shell (1). Two bolts (202) are threaded onto the sealing cover (201). The bolts (202) abut against the locking block (203), and the locking block (203) abuts against the outer shell (1). The outer shell (1) is provided with two second grooves (206). One end of the locking block (203) is located inside the second groove (206). The locking block (203) is provided with a first groove (205). One end of the bolt (202) is located inside the first groove (205). A first return spring (204) abuts between the locking block (203) and the sealing cover (201). A first sealing gasket (207) is engaged on the outer shell (1), and the first sealing gasket (207) abuts against the sealing cover (201).

3. An L-band high-pass filter according to claim 2, characterized in that: One end of the cross-section of the card block (203) is triangular, the cross-section of the second groove (206) is triangular, and one end of the cross-section of the first groove (205) is triangular.

4. An L-band high-pass filter according to claim 3, characterized in that: The heat dissipation structure (3) includes a fan (301), the fan (301) is installed on the sealing cover (201), the sealing cover (201) is provided with a first vent (302), the first vent (302) is connected to the fan (301), and the outer shell (1) is provided with a second vent (303).

5. An L-band high-pass filter according to claim 4, characterized in that: The filter structure (4) includes a fixed frame (401), which is fixedly connected to the outer shell (1). An outer frame (402) is engaged with the fixed frame (401), and a filter screen (403) is fixedly connected to the outer frame (402). The fixed frame (401) has two openings (404), and a second sealing gasket (405) is engaged with the fixed frame (401). The second sealing gasket (405) abuts against the outer frame (402).

6. An L-band high-pass filter according to claim 5, characterized in that: The blocking structure (5) includes a stop bar (501), the stop bar (501) is slidably connected to the fixed frame (401), the stop bar (501) is slidably connected to a pressure block (502), the pressure block (502) abuts against the outer frame (402), a pressure spring (503) is fixedly connected between the pressure block (502) and the stop bar (501), a slider (504) is slidably connected to the stop bar (501), the slider (504) engages with the fixed frame (401), and a second return spring (505) abuts against the slider (504) and the stop bar (501).

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