Adjustable low noise amplifier

Abstract

The invention relates to the technical field of amplifiers, and discloses an adjustable low-noise amplifier which comprises an amplifier assembly and a shell, an upper cover is arranged at the top of the shell, a circuit board is arranged in the shell, an adjusting signal amplifier and a power supply module are arranged at the top of the circuit board, and a positioning shaft is fixed to the inner bottom wall of the shell. A positioning shaft is arranged in the shell, a buffer block is fixed to the outer side of the positioning shaft, the circuit board is arranged on the outer side of the positioning shaft in a sleeving mode and located at the top of the buffer block, connecting ports are formed in the two ends of the shell, the mounting assembly is arranged on the amplifier assembly and comprises a locking piece, the locking piece comprises an extrusion rod, and the extrusion rod is located at the bottom of the upper cover. The beneficial effects of the invention are that through the arrangement of the mounting assembly, the upper cover and the circuit board are fixed, and the upper cover and the circuit board can be unlocked at the same time during disassembly, so that the circuit board can be quickly disassembled, and the maintenance time can be shortened.

Description

Technical Field

[0001] The invention relates to the technical field of amplifiers, in particular to an adjustable low-noise amplifier. Background Art

[0002] Low noise amplifier, an amplifier with very low noise figure, is generally used as a high-frequency or intermediate-frequency preamplifier of various radio receivers, and an amplifying circuit of high-sensitivity electronic detection equipment. When amplifying weak signals, the noise of the amplifier itself may seriously interfere with the signal, so it is hoped to reduce this noise to improve the output signal-to-noise ratio. The adjustable low noise amplifier can adjust certain parameters of itself according to different working conditions and requirements. The adjustable low noise amplifier can adjust its own amplification factor according to the strength of the input signal and the requirements of the subsequent processing circuit to provide appropriate signal gain. For example, in a communication system, when the received signal is strong, the amplifier gain can be reduced to prevent signal saturation and distortion; when the received signal is weak, the gain is increased to enhance the signal strength and ensure that the signal can be effectively processed by the subsequent circuit. The upper cover and circuit board of the amplifier are mostly fixed by multiple bolts, which makes it inconvenient to disassemble the circuit board when it needs to be repaired, thereby extending the repair time. Summary of the invention

[0003] In view of the above problems existing in the existing adjustable low noise amplifier, the present invention is proposed.

[0004] Therefore, the problem to be solved by the present invention is that when the circuit board is repaired, disassembly is not convenient enough.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an adjustable low-noise amplifier, comprising an amplifier component, including a shell, an upper cover is arranged on the top of the shell, a circuit board is arranged inside the shell, an adjustment signal amplifier and a power supply module are arranged on the top of the circuit board, a positioning shaft is fixed to the bottom wall of the shell, a buffer block is fixed on the outside of the positioning shaft, the circuit board is sleeved on the outside of the positioning shaft and is located on the top of the buffer block, and connection ports are arranged at both ends of the shell.

[0006] As a preferred solution of the adjustable low-noise amplifier described in the present invention, it also includes a mounting assembly, which is arranged on the amplifier assembly and includes a locking member, the locking member includes an extrusion rod, the extrusion rod is located at the bottom of the upper cover, a positioning frame is fixed to the inner wall of the shell, the extrusion rod cooperates with the positioning frame, a positioning sleeve is fixed to the bottom of the upper cover, an extrusion block is arranged in the positioning sleeve, a threaded rod is rotatably connected in the positioning sleeve, and the threaded rod is threadedly connected to the extrusion block.

[0007] As a preferred solution of the adjustable low-noise amplifier described in the present invention, wherein: the mounting assembly also includes a clamping piece, the clamping piece includes an extrusion sleeve, the extrusion sleeve is located below the upper cover and is sleeved on the outside of the positioning shaft, a buffer sleeve is fixed to the bottom of the extrusion sleeve, the bottom of the upper cover is rotatably connected to a rotating column through a bearing, a spiral groove is opened on the rotating column, a fixed shaft is fixed in the extrusion sleeve, and the fixed shaft slides in the spiral groove.

[0008] As a preferred solution of the adjustable low-noise amplifier described in the present invention, a rotating rod is fixed to one side of the rotating column, a fixed rod is fixed to one side of the extrusion rod, a connecting shaft is fixed to the end of the fixed rod, a sliding groove is provided on the rotating rod, and the connecting shaft slides in the sliding groove.

[0009] As a preferred solution of the adjustable low-noise amplifier described in the present invention, wherein: the mounting assembly also includes a protective member, the protective member includes a protective plate, the protective plate is located on one side of the connection port, a positioning rod is fixed to the top of the protective plate, a stabilizing rod is fixed to one side of the outer shell, a positioning column is fixed to the top of the positioning rod, the positioning column is movably connected to the inside of the stabilizing rod, a torsion spring is sleeved on the outer side of the positioning column, and both ends of the torsion spring are respectively fixed to the positioning column and the stabilizing rod.

[0010] As a preferred solution of the adjustable low-noise amplifier described in the present invention, wherein: the installation assembly also includes a locking member, the locking member includes a locking block, the locking block is inserted into one side of the positioning frame, the extrusion rod is provided with a locking hole corresponding to the locking block, a connecting block is fixed to one side of the locking block, a first spring is fixed to one side of the connecting block, and the other end of the first spring is fixed to the positioning frame.

[0011] As a preferred solution of the adjustable low-noise amplifier described in the present invention, the installation assembly also includes a pushing member, the pushing member includes a push rod, the push rod is inserted into the shell, and the end of the push rod is in contact with the locking block, a moving rod is fixed to one side of the push rod, a rotating block is fixed to the outside of the positioning column, a stabilizing column is fixed to one side of the shell, the stabilizing column is movably connected to the inside of the push rod, a second spring is sleeved on the outside of the stabilizing column, and both ends of the second spring are respectively fixed to the push rod and the shell.

[0012] As a preferred solution of the adjustable low noise amplifier of the present invention, a mounting block is fixed at the bottom of the extrusion rod, a third spring is fixed to one side of the mounting block, and the other end of the third spring is fixed to the inner wall of the positioning sleeve.

[0013] As a preferred solution of the adjustable low noise amplifier of the present invention, a positioning block is fixed on one side of the extrusion sleeve, a fixing column is fixed on the bottom of the upper cover, and the fixing column is movably connected with the positioning block.

[0014] As a preferred solution of the adjustable low noise amplifier of the present invention, a stabilizing frame is fixed to the bottom of the upper cover, and the extrusion rod is movably connected to the inside of the stabilizing frame.

[0015] The beneficial effects of the present invention are as follows: the upper cover and the circuit board are fixed by setting the mounting assembly, and when disassembling, the upper cover and the circuit board can be unlocked at the same time, so that the circuit board can be quickly disassembled, thereby reducing the maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them: Figure 1 This is an overall diagram of an adjustable low noise amplifier.

[0017] Figure 2 The top view of the casing of the adjustable low noise amplifier.

[0018] Figure 3 This is a structural diagram of the connection ports of an adjustable low noise amplifier.

[0019] Figure 4 For adjustable low noise amplifier Figure 3 A partial enlarged structural diagram in the middle.

[0020] Figure 5 For adjustable low noise amplifier Figure 3 A partial enlarged structural diagram of point B in the middle.

[0021] Figure 6 This is a partial cross-sectional structural diagram of the shell of the adjustable low-noise amplifier.

[0022] Figure 7 This is a structural diagram of the compression parts of the adjustable low-noise amplifier.

[0023] Figure 8 This is a cross-sectional structural diagram of the extruded sleeve of the adjustable low-noise amplifier.

[0024] Fig. 9 This is a cross-sectional structural diagram of the positioning frame of the adjustable low-noise amplifier. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments. Example

[0028] Reference Figure 1-Figure 3 and Figure 6 , which is the first embodiment of the present invention, and this embodiment provides an adjustable low noise amplifier. The adjustable low noise amplifier includes an amplifier component 100, including a shell 101, a top cover 102 is arranged on the top of the shell 101, a circuit board 103 is arranged inside the shell 101, an adjustment signal amplifier 104 and a power supply module 105 are arranged on the top of the circuit board 103, a positioning shaft 106 is fixed to the bottom wall of the shell 101, a buffer block 107 is fixed on the outside of the positioning shaft 106, the circuit board 103 is sleeved on the outside of the positioning shaft 106 and is located on the top of the buffer block 107, and connection ports 108 are arranged at both ends of the shell 101.

[0029] The shell 101 is used to install the circuit board 103, the upper cover 102 is used to close the shell 101, and the four corners of the top of the shell 101 are fixed with installation shafts for positioning the upper cover 102. The adjustment signal amplifier 104 is responsible for amplifying the input signal. Taking BJT as an example, when there is a slight input current change between the base and the emitter, the collector current will produce a large change, thereby realizing the amplification of the signal amplitude. Different types of adjustment signal amplifiers 104 have different performance characteristics, such as gain, noise factor, input and output impedance, etc. These characteristics will affect the performance of the entire amplifier. The power supply module 105 is used for power supply, and the connection port 108 is divided into an input port and an output port, which respectively connect the external signal and output the amplified signal. The above are all existing technologies, and this solution will not be elaborated, and those skilled in the art can clearly understand the working principle.

[0030] There are four positioning shafts 106, which are respectively located at the four corners inside the shell 101. The positioning shafts 106 are used to position the circuit board 103 to prevent the circuit board 103 from being offset during installation. The circuit board 103 is supported by the buffer block 107. At the same time, when the shell 101 is vibrated, the circuit board 103 can also be buffered to prevent the circuit board 103 from being damaged by the impact force. Example

[0031] Refer to the figure Figure 3-Figure 9 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0032] Specifically, it also includes an installation component 200, which is arranged on the amplifier component 100, including a locking member 201, the locking member 201 includes an extrusion rod 201a, the extrusion rod 201a is located at the bottom of the upper cover 102, a positioning frame 201b is fixed to the inner wall of the outer shell 101, the extrusion rod 201a cooperates with the positioning frame 201b, a positioning sleeve 201c is fixed to the bottom of the upper cover 102, an extrusion block 201d is arranged in the positioning sleeve 201c, a threaded rod 201e is rotatably connected in the positioning sleeve 201c, and the threaded rod 201e is connected to the inner thread of the extrusion block 201d.

[0033] There are two extrusion rods 201a and two positioning frames 201b, which are respectively located on both sides of the bottom of the upper cover 102. The inner wall of the positioning frame 201b is inclined, and the two sides of the bottom of the extrusion block 201d are inclined. A limiting column is fixed in the positioning sleeve 201c, and the limiting column is movably connected to the extrusion block 201d to prevent the extrusion block 201d from rotating when moving.

[0034] When the upper cover 102 is fitted with the top of the outer shell 101, the threaded rod 201e is rotated to drive the extrusion block 201d to move downward, so that the inclined surfaces on both sides of the bottom of the extrusion block 201d are squeezed against the extrusion rod 201a, thereby pushing the extrusion rod 201a to move, so that the other end of the extrusion rod 201a moves toward the inside of the positioning frame 201b and squeezes the inclined surface of the inner wall of the positioning frame 201b. Through the cooperation of the two, the upper cover 102 can be moved downward and the upper cover 102 is tightly fitted with the outer shell 101, thereby completing the fixation of the upper cover 102.

[0035] When the upper cover 102 needs to be disassembled, the threaded rod 201e is rotated in the opposite direction to move the extrusion block 201d upward and separate from the extrusion rod 201a, and the extrusion rod 201a is separated from the positioning frame 201b to release the lock on the upper cover 102, so that the upper cover 102 can be disassembled.

[0036] Specifically, the installation assembly 200 also includes a clamping piece 202, which includes an extrusion sleeve 202a. The extrusion sleeve 202a is located below the upper cover 102 and is sleeved on the outside of the positioning shaft 106. A buffer sleeve 202b is fixed to the bottom of the extrusion sleeve 202a. The bottom of the upper cover 102 is rotatably connected to a rotating column 202c through a bearing. A spiral groove 202c-1 is provided on the rotating column 202c. A fixed shaft 202d is fixed in the extrusion sleeve 202a, and the fixed shaft 202d slides in the spiral groove 202c-1.

[0037] There are four groups of clamping parts 202, which are respectively located at the four corners of the bottom of the upper cover 102. When the upper cover 102 is fitted with the outer shell 101, the extrusion sleeve 202a will be sleeved on the outside of the positioning shaft 106. When the rotating column 202c rotates, the fixed shaft 202d will slide in the spiral groove 202c-1. The cooperation between the two drives the extrusion sleeve 202a to move downward, so that the extrusion sleeve 202a can drive the buffer sleeve 202b to press the circuit board 103 downward, thereby completing the fixation of the circuit board 103. The buffer sleeve 202b buffers the circuit board 103, which can further prevent the circuit board 103 from being damaged when it is subjected to impact force.

[0038] Specifically, a rotating rod 202e is fixed to one side of the rotating column 202c, a fixed rod 202f is fixed to one side of the extrusion rod 201a, a connecting shaft 202g is fixed to the end of the fixed rod 202f, a sliding groove 202e-1 is opened on the rotating rod 202e, and the connecting shaft 202g slides in the sliding groove 202e-1.

[0039] When the extrusion rod 201a moves, it drives the fixed rod 202f to move. The fixed rod 202f drives the rotating rod 202e to rotate through the cooperation of the connecting shaft 202g and the slide groove 202e-1, so that the rotating rod 202e drives the rotating column 202c to rotate.

[0040] Specifically, the installation component 200 also includes a protective member 203, which includes a protective plate 203a. The protective plate 203a is located on one side of the connection port 108. A positioning rod 203b is fixed to the top of the protective plate 203a. A stabilizing rod 203c is fixed to one side of the outer shell 101. A positioning column 203e is fixed to the top of the positioning rod 203b. The positioning column 203e is movably connected to the stabilizing rod 203c. A torsion spring 203d is sleeved on the outer side of the positioning column 203e, and both ends of the torsion spring 203d are respectively fixed to the positioning column 203e and the stabilizing rod 203c.

[0041] There are two protective members 203 , corresponding to two connection ports 108 respectively. When the connection port 108 is not connected to the outside, the connection port 108 is protected by the protective plate 203 a to prevent dust from entering the connection port 108 during placement.

[0042] The positioning rod 203b is connected to the stabilizing rod 203c by the cooperation of the positioning column 203e, so that the positioning rod 203b can rotate at the end of the stabilizing rod 203c, so that the protective plate 203a can be rotated upward when the connection port 108 is used.

[0043] A groove is provided on the side of the positioning rod 203b close to the torsion spring 203d, one end of the torsion spring 203d extends into the groove and is fixed to the stabilizing rod 203c, and the end of the positioning column 203e away from the torsion spring 203d is fixed to the positioning rod 203b. The torsion spring 203d applies a downward torsional force to the positioning column 203e, and the positioning rod 203b and the protective plate 203a are driven downward by the positioning column 203e, so that the protective plate 203a can always fit with the connection port 108 and protect the connection port 108.

[0044] Specifically, the installation assembly 200 also includes a locking member 204, which includes a locking block 204a, which is inserted into one side of the positioning frame 201b, and a locking hole 201a-1 corresponding to the locking block 204a is opened on the extrusion rod 201a, and a connecting block 204b is fixed to one side of the locking block 204a, and a first spring 204c is fixed to one side of the connecting block 204b, and the other end of the first spring 204c is fixed to the positioning frame 201b.

[0045] The number of locking pieces 204 corresponds to the two extrusion rods 201a. When the locking block 204a is engaged with the locking hole 201a-1, the extrusion rod 201a is locked through the cooperation of the two, so that the extrusion rod 201a cannot be separated from the positioning frame 201b, thereby avoiding the extrusion rod 201a from being separated from the positioning frame 201b when it is shaken by external force during use, thereby causing the upper cover 102 to fall off.

[0046] The first spring 204c is used to apply a thrust to the connecting block 204b and drive the locking block 204a to move through the connecting block 204b, so that the locking block 204a will not engage with the locking hole 201a-1 when there is no thrust. Example

[0047] Reference Figure 1-Figure 9 , which is the third embodiment of the present invention, and is based on the first two embodiments.

[0048] Specifically, the installation component 200 also includes a pushing member 205, which includes a push rod 205a. The push rod 205a is inserted into the shell 101, and the end of the push rod 205a is in contact with the locking block 204a. A moving rod 205b is fixed to one side of the push rod 205a, and a rotating block 205c is fixed to the outside of the positioning column 203e. A stabilizing column 205d is fixed to one side of the shell 101, and the stabilizing column 205d is movably connected to the inside of the push rod 205a. A second spring 205e is sleeved on the outside of the stabilizing column 205d, and both ends of the second spring 205e are respectively fixed to the push rod 205a and the shell 101.

[0049] One side of the locking block 204a is inclined, the end of the push rod 205a located outside the housing 101 is L-shaped, the moving rod 205b is movably connected to the top of the stabilizing rod 203c, a rotating groove is provided at the end of the stabilizing rod 203c, and the rotating block 205c is movably connected to the rotating groove.

[0050] When the protective plate 203a is opened upward, the positioning column 203e will drive the rotating block 205c to rotate, so that the rotating block 205c pushes the moving rod 205b to move, and the moving rod 205b drives the push rod 205a to squeeze the inclined surface of the locking block 204a, so that the locking block 204a can be engaged with the locking hole 201a-1. In this way, the upper cover 102 cannot be separated from the outer shell 101 during use, and the accidental opening of the two when vibrated by external force can be avoided. At the same time, the erroneous operation of disassembling the circuit board 103 without disconnecting the external connection when repairing the circuit board 103 can be avoided.

[0051] Specifically, a mounting block 201a-3 is fixed to the bottom of the extrusion rod 201a, a third spring 201a-2 is fixed to one side of the mounting block 201a-3, and the other end of the third spring 201a-2 is fixed to the inner wall of the positioning sleeve 201c.

[0052] When the squeezing block 201d is separated from the squeezing rod 201a, the third spring 201a-2 applies a thrust to the mounting block 201a-3, thereby driving the squeezing rod 201a to separate from the positioning frame 201b through the mounting block 201a-3.

[0053] Specifically, a positioning block 202a-1 is fixed to one side of the extrusion sleeve 202a, and a fixing column 202a-2 is fixed to the bottom of the upper cover 102. The fixing column 202a-2 is movably connected to the positioning block 202a-1.

[0054] The cooperation between the positioning block 202a-1 and the fixing column 202a-2 can prevent the extrusion sleeve 202a from rotating when moving.

[0055] Specifically, a stabilizing frame 201f is fixed to the bottom of the upper cover 102, and the extrusion rod 201a is movably connected to the stabilizing frame 201f.

[0056] The stabilizing frame 201f is used to position the extrusion rod 201a to prevent the extrusion rod 201a from deviating when moving.

[0057] During use, after the upper cover 102 is fitted with the top of the outer shell 101, the threaded rod 201e is rotated to drive the extrusion block 201d to move downward, so that the inclined surfaces on both sides of the bottom of the extrusion block 201d squeeze the extrusion rod 201a, thereby pushing the extrusion rod 201a to move, so that the other end of the extrusion rod 201a moves toward the inside of the positioning frame 201b and squeezes the inclined surface of the inner wall of the positioning frame 201b. Through the cooperation of the two, the upper cover 102 can be moved downward and the upper cover 102 can be tightly fitted with the outer shell 101, thereby completing the fixation of the upper cover 102.

[0058] When the extrusion rod 201a moves, it will drive the fixed rod 202f to move. The fixed rod 202f drives the rotating rod 202e to rotate through the cooperation of the connecting shaft 202g and the slide groove 202e-1, so that the rotating rod 202e can drive the rotating column 202c to rotate. When the rotating column 202c rotates, it will make the fixed shaft 202d slide in the spiral groove 202c-1. The cooperation of the two drives the extrusion sleeve 202a to move downward, so that the extrusion sleeve 202a can drive the buffer sleeve 202b to press the circuit board 103 downward, thereby completing the fixation of the circuit board 103, and the circuit board 103 is buffered by the buffer sleeve 202b, which can further avoid the circuit board 103 from being damaged when it is subjected to impact force.

[0059] When using the connection port 108, the protective plate 203a is rotated upward to open it, so that the connection port 108 can be exposed to the outside. At the same time, when the protective plate 203a is opened upward, the rotating block 205c will be driven to rotate through the positioning column 203e, so that the rotating block 205c pushes the moving rod 205b to move, and the moving rod 205b drives the push rod 205a to squeeze the inclined surface of the locking block 204a, so that the locking block 204a can be engaged with the locking hole 201a-1. In this way, during use, the upper cover 102 cannot be separated from the outer shell 101, and the accidental opening of the two when subjected to external vibration can be avoided. At the same time, when repairing the circuit board 103, the erroneous operation of disassembling the circuit board 103 without disconnecting the external connection can be avoided.

[0060] When the circuit board 103 needs to be repaired and the upper cover 102 needs to be disassembled, the connection port 108 needs to be disconnected from the external connection first, and the protective plate 203a will be closed downward, and the rotating block 205c will be separated from the moving rod 205b. At this time, the second spring 205e applies a thrust to the push rod 205a to separate the push rod 205a from the locking block 204a, and the first spring 204c pushes the connecting block 204b and the locking block 204a to move, so that the locking block 204a is separated from the locking hole 201a-1. At this time, the threaded rod 201e can be rotated in the opposite direction to move the extrusion block 201d upward and separate from the extrusion rod 201a. At the same time, the extrusion rod 201a is separated from the positioning frame 201b to release the lock on the upper cover 102, so that the upper cover 102 can be disassembled.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An adjustable low noise amplifier, characterized in that: include, An amplifier assembly (100) comprises a housing (101), wherein an upper cover (102) is arranged on the top of the housing (101), a circuit board (103) is arranged inside the housing (101), a regulating signal amplifier (104) and a power supply module (105) are arranged on the top of the circuit board (103), a positioning shaft (106) is fixed to the inner bottom wall of the housing (101), a buffer block (107) is fixed to the outside of the positioning shaft (106), the circuit board (103) is sleeved on the outside of the positioning shaft (106) and is located on the top of the buffer block (107), and connection ports (108) are arranged at both ends of the housing (101).

2. The adjustable low noise amplifier according to claim 1, wherein: It also includes a mounting assembly (200) which is arranged on the amplifier assembly (100) and includes a locking member (201). The locking member (201) includes an extrusion rod (201a). The extrusion rod (201a) is located at the bottom of the upper cover (102). A positioning frame (201b) is fixed to the inner wall of the outer shell (101). The extrusion rod (201a) cooperates with the positioning frame (201b). A positioning sleeve (201c) is fixed to the bottom of the upper cover (102). An extrusion block (201d) is arranged in the positioning sleeve (201c). A threaded rod (201e) is rotatably connected in the positioning sleeve (201c). The threaded rod (201e) is internally threadedly connected to the extrusion block (201d).

3. The adjustable low noise amplifier according to claim 2, wherein: The mounting assembly (200) further comprises a clamping member (202), wherein the clamping member (202) comprises an extrusion sleeve (202a), wherein the extrusion sleeve (202a) is located below the upper cover (102) and is sleeved on the outside of the positioning shaft (106), wherein a buffer sleeve (202b) is fixed to the bottom of the extrusion sleeve (202a), wherein the bottom of the upper cover (102) is rotatably connected to a rotating column (202c) via a bearing, wherein a spiral groove (202c-1) is formed on the rotating column (202c), and a fixed shaft (202d) is fixed in the extrusion sleeve (202a), wherein the fixed shaft (202d) slides in the spiral groove (202c-1).

4. The adjustable low noise amplifier as claimed in claim 3, characterized in that: A rotating rod (202e) is fixed to one side of the rotating column (202c), a fixing rod (202f) is fixed to one side of the extrusion rod (201a), a connecting shaft (202g) is fixed to the end of the fixing rod (202f), a sliding groove (202e-1) is provided on the rotating rod (202e), and the connecting shaft (202g) slides in the sliding groove (202e-1).

5. The adjustable low noise amplifier according to claim 3 or 4, characterized in that: The installation assembly (200) further comprises a protective member (203), wherein the protective member (203) comprises a protective plate (203a), wherein the protective plate (203a) is located on one side of the connection port (108), a positioning rod (203b) is fixed to the top of the protective plate (203a), a stabilizing rod (203c) is fixed to one side of the housing (101), a positioning column (203e) is fixed to the top of the positioning rod (203b), the positioning column (203e) is movably connected to the inside of the stabilizing rod (203c), a torsion spring (203d) is sleeved on the outside of the positioning column (203e), and two ends of the torsion spring (203d) are respectively fixed to the positioning column (203e) and the stabilizing rod (203c).

6. The adjustable low noise amplifier according to claim 5, wherein: The mounting assembly (200) further comprises a locking member (204), wherein the locking member (204) comprises a locking block (204a), wherein the locking block (204a) is plugged into one side of the positioning frame (201b), wherein the extrusion rod (201a) is provided with a locking hole (201a-1) corresponding to the locking block (204a), wherein a connecting block (204b) is fixed to one side of the locking block (204a), wherein a first spring (204c) is fixed to one side of the connecting block (204b), and the other end of the first spring (204c) is fixed to the positioning frame (201b).

7. The adjustable low noise amplifier according to claim 6, wherein: The installation assembly (200) further comprises a pushing member (205), wherein the pushing member (205) comprises a push rod (205a), wherein the push rod (205a) is inserted into the housing (101) and an end portion thereof contacts the locking block (204a), a moving rod (205b) is fixed to one side of the push rod (205a), a rotating block (205c) is fixed to the outside of the positioning column (203e), a stabilizing column (205d) is fixed to one side of the housing (101), the stabilizing column (205d) is movably connected to the inside of the push rod (205a), a second spring (205e) is sleeved on the outside of the stabilizing column (205d), and two ends of the second spring (205e) are respectively fixed to the push rod (205a) and the housing (101).

8. The adjustable low noise amplifier according to claim 6 or 7, characterized in that: A mounting block (201a-3) is fixed to the bottom of the extrusion rod (201a), a third spring (201a-2) is fixed to one side of the mounting block (201a-3), and the other end of the third spring (201a-2) is fixed to the inner wall of the positioning sleeve (201c).

9. The adjustable low noise amplifier according to claim 8, wherein: A positioning block (202a-1) is fixed to one side of the extrusion sleeve (202a), a fixing column (202a-2) is fixed to the bottom of the upper cover (102), and the fixing column (202a-2) is movably connected to the positioning block (202a-1).

10. The adjustable low noise amplifier according to claim 9, characterized in that: A stabilizing frame (201f) is fixed to the bottom of the upper cover (102), and the extrusion rod (201a) is movably connected to the inside of the stabilizing frame (201f).

Images