High linearity low noise amplifier

Abstract

The utility model belongs to the technical field of amplifiers, and particularly discloses a high-linearity low-noise amplifier which comprises an amplifier body, side edges of the amplifier body are provided with installation side lugs, the bottom of the amplifier body is provided with an installation groove and a movable groove, the movable groove is located on the side edges of the installation groove, a cover plate is arranged in the installation groove, and a dustproof net is arranged on the cover plate. A fixed inserting groove is formed in the side edge of the cover plate, a movable plate, a positioning rod and a spring are arranged in the movable groove, the positioning rod penetrates through the movable plate and is fixed to the inner side wall of the movable groove, the spring is arranged on the outer side of the positioning rod in a sleeving mode, a fixed inserting plate matched with the fixed inserting groove is fixed to the movable plate, and the fixed inserting plate penetrates through the movable groove and is inserted into the fixed inserting groove to fix the cover plate. The movable plate is poked backwards, so that the movable plate drives the fixed insertion plate to retreat from the fixed insertion groove, locking and fixing of the cover plate can be canceled, during installation, the movable plate is pushed back to the original position through the elastic force of the spring, and meanwhile, the fixed insertion plate of the movable plate is inserted into the fixed insertion groove again to fix the cover plate.

Description

Technical Field

[0001] The utility model relates to the technical field of amplifiers, in particular to a high-linearity low-noise amplifier. Background Art

[0002] A high-linearity, low-noise amplifier with a very low noise figure. It is commonly used as a high-frequency or intermediate-frequency preamplifier in various radio receivers, as well as an amplifier circuit in highly sensitive electronic detection equipment. When amplifying weak signals, the amplifier's own noise can significantly interfere with the signal, so it is desirable to reduce this noise to improve the output signal-to-noise ratio.

[0003] Existing high-linearity low-noise amplifiers have poor heat dissipation capabilities. Therefore, some people have thought of providing heat dissipation holes at the bottom of the amplifier to assist the amplifier in dissipating heat. For example, Chinese utility model patent No. CN218473126U specifically discloses a low-noise amplifier.

[0004] However, in actual use, existing high-linearity, low-noise amplifiers often incorporate dust screens within the heat dissipation holes to prevent dust from entering the amplifier. However, after long-term use, a large amount of dust accumulates on the surface of the screen, and if it is not cleaned regularly, it can directly affect proper heat dissipation. Since the screen is located inside the amplifier, maintaining it requires removing the cover, which is typically secured with bolts. This requires tools to remove the screws, making it very cumbersome and inconvenient to maintain the screen later. Utility Model Content

[0005] The purpose of the present invention is to provide a high linearity low noise amplifier to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-linearity low-noise amplifier, comprising an amplifier main body, a mounting side ear being provided on the side of the amplifier main body, a mounting groove and a movable groove being provided at the bottom of the amplifier main body, the movable groove being located on the side of the mounting groove, a cover plate being provided in the mounting groove, a dustproof net being provided on the cover plate, a fixed slot being provided on the side of the cover plate, a movable plate, a positioning rod and a spring being provided in the movable slot, the positioning rod and the movable plate being perpendicular to each other, the positioning rod passing through the movable plate and being fixed to the inner side wall of the movable slot, the spring being sleeved on the outside of the positioning rod, and the two ends of the spring being respectively connected to the movable plate and the inner wall of the movable slot, a fixed plug-in plate cooperating with the fixed slot being fixed on the movable plate, the fixed plug-in plate passing through the movable slot and being inserted in the fixed slot to fix the cover plate, by pushing the movable plate backward so that the movable plate drives the fixed plug-in plate to withdraw from the fixed slot, the locking fixation of the cover plate can be cancelled, and then the cover plate can be directly removed, and during installation, the elastic force of the spring is used to push the movable plate back to its original position, and at the same time, the fixed plug-in plate of the movable plate is reinserted into the fixed slot to fix the cover plate.

[0007] Preferably, a limiting plate is provided on the outside of the movable groove, a through sliding groove is provided in the middle of the limiting plate, a shift block is slidably connected in the sliding groove, and the shift block is fixed to the movable plate. The movable plate is limited by setting the limiting plate, and the shift block is provided to facilitate the staff to shift the movable plate backward.

[0008] Preferably, both ends of the amplifier body are provided with connection interfaces, and the connection interfaces at both ends are respectively a radio frequency input end and a radio frequency output end.

[0009] Preferably, a plurality of through slots are provided on the mounting side ears, and the through slots can be used with self-tapping screws to mount the high linearity low noise amplifier.

[0010] Preferably, a plurality of feet are provided under the mounting side ears, and the plurality of feet are respectively located on the sides of the through slots, and rubber pads are provided under the feet. The feet are provided to raise the amplifier body to prevent the bottom of the amplifier body from fitting with other objects.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The utility model is provided with a fixed plug plate which is inserted into the fixed slot of the cover plate to lock it and fix it. When the cover plate needs to be removed, it is only necessary to push the movable plate backward so that the movable plate drives the fixed plug plate to withdraw from the fixed slot, and the cover plate can be directly removed. The utility model is very convenient and the operation is simple and easy to understand, so that the cover plate can be disassembled and installed later and the dustproof net can be maintained, thereby improving the practicality of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model Figure 1 ;

[0014] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model Figure 2 ;

[0015] Figure 3 This is a partial cross-sectional structural diagram of the utility model;

[0016] Figure 4 For this utility model Figure 3 A schematic diagram of the enlarged structure of the middle part A;

[0017] Figure 5 This is a schematic diagram of the cover structure of the utility model.

[0018] In the figure: 1. Amplifier body; 2. Connection interface; 3. Mounting ear; 4. Through slot; 5. Foot pad; 6. Mounting slot; 7. Cover; 8. Heat dissipation slot; 9. Movable slot; 10. Limiting plate; 11. Slide slot; 12. Movable plate; 13. Dial block; 14. Positioning rod; 15. Spring; 16. Fixed plug-in plate; 17. Fixed slot; 18. Dust screen. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0021] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0022] See also Figure 1-5The utility model provides a technical solution: a high linearity low noise amplifier, comprising an amplifier body 1, wherein the side of the amplifier body 1 is provided with a mounting side ear 3, the bottom of the amplifier body 1 is provided with a mounting groove 6 and a movable groove 9, the movable groove 9 is located on the side of the mounting groove 6, a cover plate 7 is provided in the mounting groove 6, a dustproof net 18 is provided on the cover plate 7, a fixed slot 17 is provided on the side of the cover plate 7, a movable plate 12, a positioning rod 14 and a spring 15 are provided in the movable groove 9, the positioning rod 14 and the movable plate 12 are perpendicular to each other, the positioning rod 14 passes through the movable plate 12 and is fixed to the inner wall of the movable groove 9, and the spring 15 is sleeved on the outside of the positioning rod 14 Side, and both ends of the spring 15 are respectively connected to the movable plate 12 and the inner wall of the movable groove 9. A fixed plugboard 16 is fixed on the movable plate 12 and cooperates with the fixed slot 17. The fixed plugboard 16 passes through the movable slot 9 and is inserted into the fixed slot 17 to fix the cover 7. By shifting the movable plate 12 backward, the movable plate 12 drives the fixed plugboard 16 to withdraw from the fixed slot 17, and the locking fixation of the cover 7 can be cancelled. Then the cover 7 can be directly removed. During installation, the elastic force of the spring 15 is used to push the movable plate 12 back to its original position, and the fixed plugboard 16 of the movable plate 12 is reinserted into the fixed slot 17 to fix the cover 7.

[0023] Furthermore, a limiting plate 10 is provided on the outside of the movable groove 9, and a through sliding groove 11 is opened in the middle of the limiting plate 10. A shift block 13 is slidably connected in the sliding groove 11, and the shift block 13 is fixed to the movable plate 12. The movable plate 12 is limited by setting the limiting plate 10, and the shift block 13 is provided at the same time to facilitate the staff to shift the movable plate 12 backward.

[0024] Furthermore, both ends of the amplifier body 1 are provided with connection interfaces 2, and the connection interfaces 2 at both ends are respectively a radio frequency input end and a radio frequency output end.

[0025] Furthermore, a plurality of through slots 4 are provided on the mounting side ears 3 , and the through slots 4 can be used with self-tapping screws to mount the high linearity low noise amplifier.

[0026] Furthermore, a plurality of feet 5 are provided under the mounting side ears 3, and the plurality of feet 5 are respectively located on the sides of the through slots 4, and rubber pads are provided under the feet 5. The feet 5 are provided to raise the amplifier body 1 to prevent the bottom of the amplifier body 1 from sticking to other objects.

[0027] In summary, when the present invention is in use, the heat dissipation slots 8 are provided to achieve a heat dissipation effect, and the dust screen 18 provided can prevent external dust from entering the interior of the amplifier body 1. After long-term use, when the dust screen 18 needs to be maintained, it is only necessary to push the shift block 13 backward so that the shift block 13 drives the movable plate 12 to move in the movable slot 9, so that the movable plate 12 squeezes the spring 15, causing the spring 15 to deform and shrink. At the same time, the movable plate 12 drives the fixed plug-in plate 16 to move. When the fixed plug-in plate 16 is withdrawn from the fixed slot 17 of the cover plate 7, the fixation of the cover plate 7 can be canceled, and the cover plate 7 can be removed. After removal, the dust screen 18 can be maintained. When installing, it is only necessary to push the movable plate 12 backward again, then place the cover plate 7 into the installation slot 6, and then release the shift block 13, so that the spring 15 rebounds, pushing the movable plate 12 back, so that the movable plate 12 drives the fixed plug-in plate 16 to be inserted back into the fixed slot 17, thereby re-fixing the cover plate 7.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. High linearity low noise amplifier, characterized by: The invention comprises an amplifier body (1), wherein a mounting side ear (3) is provided on the side of the amplifier body (1), a mounting groove (6) and a movable groove (9) are provided on the bottom of the amplifier body (1), the movable groove (9) is located on the side of the mounting groove (6), a cover plate (7) is provided in the mounting groove (6), a dustproof net (18) is provided on the cover plate (7), a fixed slot (17) is provided on the side of the cover plate (7), a movable plate (12), a positioning rod (14) and a spring (15) are provided in the movable groove (9), and the positioning rod ( 14) and the movable plate (12) are perpendicular to each other, the positioning rod (14) passes through the movable plate (12) and is fixed to the inner wall of the movable groove (9), the spring (15) is sleeved on the outside of the positioning rod (14), and the two ends of the spring (15) are respectively connected to the movable plate (12) and the inner wall of the movable groove (9), the movable plate (12) is fixed with a fixed plug-in plate (16) matched with the fixed slot (17), the fixed plug-in plate (16) passes through the movable groove (9) and is inserted into the fixed slot (17) to fix the cover plate (7).

2. The high linearity low noise amplifier according to claim 1, wherein: A limiting plate (10) is provided on the outside of the movable groove (9), a through sliding groove (11) is provided in the middle of the limiting plate (10), a shifting block (13) is slidably connected in the sliding groove (11), and the shifting block (13) is fixed to the movable plate (12).

3. The high linearity low noise amplifier according to claim 1, wherein: Both ends of the amplifier body (1) are provided with connection interfaces (2), and the connection interfaces (2) at the two ends are respectively a radio frequency input end and a radio frequency output end.

4. The high linearity low noise amplifier according to claim 1, wherein: A plurality of through slots (4) are provided on the mounting side ears (3).

5. The high linearity low noise amplifier according to claim 1, wherein: A plurality of padding feet (5) are provided below the mounting side ears (3), the plurality of padding feet (5) are respectively located on the sides of the through slots (4), and a rubber pad is provided below the padding feet (5).

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