A waveguide coaxial isolator resistant to magnetic field interference

Abstract

The utility model provides a waveguide coaxial isolator resistant to magnetic field interference, relates to the field of waveguide coaxial isolators, and comprises a shielding component, wherein the shielding component comprises a protective shell, a sealing plate, a waveguide tube and a protective cover, a circuit board is installed in the inner cavity of the protective shell, and the protective shell, the sealing plate and the protective cover are used to provide protection for the circuit board, an input terminal is installed on one side of the protective shell, and an output terminal is arranged on the other side of the protective shell; the utility model provides protection for the circuit board, the input terminal and the output terminal by arranging the protective shell, the sealing plate, the waveguide tube and the protective cover, the protective shell, the sealing plate and the protective cover can provide protection for the circuit board, prevent the circuit board from being affected by electromagnetic interference and causing failure to affect use, and the waveguide tube and the protective cover can shield the electromagnetic interference signals at the input end and the output end, prevent the electromagnetic signals from interfering with signal reception and output, and affect the stability of signal transmission.

Description

Technical Field

[0001] The utility model belongs to the field of waveguide coaxial isolators, in particular to a waveguide coaxial isolator capable of resisting magnetic field interference. Background Art

[0002] Waveguide coaxial isolator is a device used in microwave and radio frequency systems. It is mainly used to isolate signals on coaxial transmission lines to prevent signals from interfering or reflecting each other between different ports. The structure of the waveguide coaxial isolator includes a main waveguide part, a coaxial line part, a coupling structure, an isolation device, an adjustment device and a protection device. These components work together to enable the isolator to effectively isolate microwave signals and prevent signal reflection and mutual interference. It plays an important role in microwave and radio frequency systems.

[0003] According to the Chinese patent application number: 202122253781.3, a radio frequency coaxial isolator is disclosed, including a shell and an isolation component arranged inside the shell, connectors are provided at both ends of the shell, the connectors are electrically connected to the isolation component, a heat dissipation shell is provided on the outer wall of the shell, the inner wall of the heat dissipation shell and the outer wall of the shell form a dielectric cavity, and a heat dissipation medium is filled inside the dielectric cavity; a plurality of heat-conducting fins in contact with the heat dissipation medium are provided on the outer wall of the shell, and a medium inlet and a medium outlet are provided on the heat dissipation shell; a heat dissipation shell is provided outside the shell of the isolator, and a heat dissipation medium is filled between the heat dissipation shell and the shell, and heat is conducted out through the heat dissipation fins provided on the outer wall of the shell, and then the heat dissipation medium injected from the outside takes away the heat, and the isolator is continuously cooled, and the heat dissipation medium is used to actively cool the isolator, which is suitable for use in high-power isolators;

[0004] The existing technology effectively solves the problem that the isolator has poor heat dissipation effect and is easy to affect the use. It has the advantage of good heat dissipation effect, but the components inside the isolator and the output and input ends are easily affected by electromagnetic interference, resulting in unstable signal output.

[0005] In summary, the utility model provides a waveguide coaxial isolator resistant to magnetic field interference to solve the above problems. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] A magnetic field interference resistant waveguide coaxial isolator comprises a shielding component, wherein the shielding component comprises a protective shell, a sealing plate, a waveguide tube and a protective cover, a circuit board is installed in the inner cavity of the protective shell, and the protective shell, the sealing plate and the protective cover are used to provide protection for the circuit board, an input terminal is installed on one side of the protective shell, and an output terminal is arranged on the other side of the protective shell, the input terminal is used for signal input, and the output terminal is used for signal output, and the waveguide tube is used to provide protection for the input terminal and the output terminal.

[0008] Furthermore, in the present invention, the protective cover is located in the inner cavity of the protective shell and is movably connected to the inner cavity of the protective shell, and the circuit board extends to the inner cavity of the protective cover and is movably connected to the inner cavity of the protective cover.

[0009] Furthermore, in the utility model, the number of the waveguide tubes is two, the two waveguide tubes are threadedly connected to the protective shell via bolts, and the sealing plate is threadedly connected to the protective shell via bolts.

[0010] Furthermore, in the present invention, the input terminal is installed on one side of the waveguide tube, and the output terminal is installed on the inner cavity of the waveguide tube on the other side.

[0011] Furthermore, in the present invention, one end of the input terminal extends to the inner cavity of the protective cover and is connected to the input end of the circuit board, and one end of the output terminal extends to the inner cavity of the protective cover and is connected to the output end of the circuit board.

[0012] Furthermore, in the utility model, the shielding assembly also includes an external thread and an internal thread, the external thread is arranged on the surface of the waveguide on one side, and the internal thread is arranged in the inner cavity of the waveguide on the other side.

[0013] Furthermore, in the utility model, the inner cavities of the protective shell, the waveguide and the protective cover are coated with an electromagnetic shielding agent, and the electromagnetic field shielding agent is an EMI shielding coating.

[0014] Beneficial effects: The utility model has the following beneficial effects:

[0015] The utility model provides protection for the circuit board, input terminals and output terminals by arranging the protective shell, the sealing plate, the waveguide tube and the protective cover. The protective shell, the sealing plate and the protective cover can provide protection for the circuit board to prevent the circuit board from being affected by electromagnetic interference and causing failures that affect the use. The waveguide tube and the protective cover can shield the electromagnetic interference signals at the input and output ends to prevent the electromagnetic signals from interfering with signal reception and output and affecting the stability of signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the protective shell and the waveguide of the utility model in a separated state;

[0018] Figure 3 It is a schematic diagram of the structure of the protective shell, the sealing plate and the protective cover in the separated state of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the connection state of the waveguide tube and the output terminal of the utility model.

[0020] In the figure:

[0021] 1. Shielding assembly; 101. Protective shell; 102. Sealing plate; 103. Waveguide; 104. Protective cover; 105. External thread; 106. Internal thread; 2. Circuit board; 3. Input terminal; 4. Output terminal. DETAILED DESCRIPTION

[0022] In order to better understand the technical content of the utility model, specific embodiments are cited and described as follows in conjunction with the accompanying drawings. In this disclosure, various aspects of the utility model are described with reference to the accompanying drawings, and many illustrative embodiments are shown in the accompanying drawings. The embodiments of the present disclosure are not necessarily defined to include all aspects of the utility model. It should be understood that the various concepts and embodiments introduced above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in the utility model are not limited to any implementation method. In addition, some aspects disclosed in the utility model can be used alone, or used in any appropriate combination with other aspects disclosed in the utility model.

[0023] Example 1

[0024] like Figure 1-4 As shown, it is the first embodiment of the utility model, which provides a waveguide coaxial isolator resistant to magnetic field interference, including a shielding component 1, the shielding component 1 includes a protective shell 101, a sealing plate 102, a waveguide tube 103 and a protective cover 104, the inner cavity of the protective shell 101 is installed with a circuit board 2, the protective shell 101, the sealing plate 102 and the protective cover 104 are used to provide protection for the circuit board 2, an input terminal 3 is installed on one side of the protective shell 101, and an output terminal 4 is arranged on the other side of the protective shell 101, the input terminal 3 is used for signal input, the output terminal 4 is used for signal output, and the waveguide tube 103 is used to provide protection for the input terminal 3 and the output terminal 4.

[0025] like Figure 1-4As shown, the protective shell 101, the sealing plate 102 and the protective cover 104 can provide protection for the circuit board 2, thereby reducing the occurrence of malfunctions caused by interference from electromagnetic signals on the circuit board 2. The protective shell 101, the sealing plate 102 and the protective cover 104 can also prevent the circuit board 2 from being contaminated by external dust, thereby effectively improving the operating stability of the circuit board 2. The waveguide tube 103 can shield the electromagnetic interference signals of the input terminal 3 and the output terminal 4, thereby ensuring the stability of transmission. The protective shell 101, the sealing plate 102, the waveguide tube 103 and the protective cover 104 are all made of aluminum.

[0026] Embodiment 1-4 is the second embodiment of the present utility model, and this embodiment is based on the previous embodiment.

[0027] In this embodiment, the protective cover 104 is located in the inner cavity of the protective shell 101 and is movably connected to the inner cavity of the protective shell 101 , and the circuit board 2 extends to the inner cavity of the protective cover 104 and is movably connected to the inner cavity of the protective cover 104 .

[0028] There are two waveguide tubes 103 , and both waveguide tubes 103 are threadedly connected to the protective shell 101 through bolts. The sealing plate 102 is threadedly connected to the protective shell 101 through bolts.

[0029] The input terminal 3 is installed on one side of the waveguide 103 , and the output terminal 4 is installed on the inner cavity of the other side of the waveguide 103 .

[0030] One end of the input terminal 3 extends to the inner cavity of the protective cover 104 and is connected to the input end of the circuit board 2 , and one end of the output terminal 4 extends to the inner cavity of the protective cover 104 and is connected to the output end of the circuit board 2 .

[0031] The shielding assembly 1 further includes an external thread 105 and an internal thread 106 . The external thread 105 is arranged on the surface of the waveguide 103 on one side, and the internal thread 106 is arranged in the inner cavity of the waveguide 103 on the other side.

[0032] The inner cavities of the protective shell 101, the waveguide 103 and the protective cover 104 are all coated with an electromagnetic shielding agent, and the electromagnetic field shielding agent is an EMI shielding coating.

[0033] like Figure 1-4 As shown, the inner cavities of the protective shell 101, the sealing plate 102, the waveguide tube 103 and the protective cover 104 are coated with electromagnetic shielding agents to improve the shielding effect of electromagnetic interference signals, thereby improving the effect of resisting magnetic field interference. The protective cover 104 surrounds and covers the circuit board 2, thereby improving effective protection. The sealing plate 102 is connected to the protective shell 101 by bolts and can be easily disassembled, thereby facilitating the maintenance of the circuit board 2. The setting of the external thread 105 and the internal thread 106 can facilitate the connection of an external coaxial radio frequency line.

[0034] When in use, the circuit board 2 is first covered and surrounded by the protective cover 104, and then the protective shell 101 is sealed by the sealing plate 102. The protective shell 101, the sealing plate 102 and the protective cover 104 are combined to form a protective space, which can provide effective protection for the circuit board 2, thereby reducing the occurrence of malfunctions caused by interference from electromagnetic signals on the circuit board 2. Then, the external input line is connected to the input terminal 3, and the output line is connected to the output terminal 4. The waveguide 103 can shield the electromagnetic interference signals of the input terminal 3 and the output terminal 4, thereby reducing the occurrence of malfunctions caused by interference from electromagnetic signals on the circuit board 2.

[0035] The standard parts used in this application document can all be purchased from the market and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented through simple programming by technicians in this field, which is common knowledge in the field. This application is mainly used to protect mechanical devices, so this application no longer explains the control method and circuit connection in detail.

[0036] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. A waveguide coaxial isolator resistant to magnetic field interference, comprising a shielding component (1), characterized in that: The shielding component (1) comprises a protective shell (101), a sealing plate (102), a waveguide tube (103) and a protective cover (104); a circuit board (2) is installed in the inner cavity of the protective shell (101); the protective shell (101), the sealing plate (102) and the protective cover (104) are used to provide protection for the circuit board (2); an input terminal (3) is installed on one side of the protective shell (101); an output terminal (4) is provided on the other side of the protective shell (101); the input terminal (3) is used for signal input; the output terminal (4) is used for signal output; and the waveguide tube (103) is used to provide protection for the input terminal (3) and the output terminal (4).

2. The magnetic field interference resistant waveguide coaxial isolator according to claim 1, characterized in that: The protective cover (104) is located in the inner cavity of the protective shell (101) and is movably connected to the inner cavity of the protective shell (101); the circuit board (2) extends to the inner cavity of the protective cover (104) and is movably connected to the inner cavity of the protective cover (104).

3. The waveguide coaxial isolator resistant to magnetic field interference as claimed in claim 1, characterized in that: The number of the waveguide tubes (103) is two, and the two waveguide tubes (103) are both threadedly connected to the protective shell (101) via bolts, and the sealing plate (102) is threadedly connected to the protective shell (101) via bolts.

4. The magnetic field interference resistant waveguide coaxial isolator according to claim 1, characterized in that: The input terminal (3) is installed on one side of the waveguide tube (103), and the output terminal (4) is installed on the inner cavity of the waveguide tube (103) on the other side.

5. The magnetic field interference resistant waveguide coaxial isolator according to claim 1, characterized in that: One end of the input terminal (3) extends to the inner cavity of the protective cover (104) and is connected to the input end of the circuit board (2), and one end of the output terminal (4) extends to the inner cavity of the protective cover (104) and is connected to the output end of the circuit board (2).

6. The waveguide coaxial isolator resistant to magnetic field interference as claimed in claim 1, characterized in that: The shielding assembly (1) further comprises an external thread (105) and an internal thread (106); the external thread (105) is arranged on the surface of the waveguide tube (103) on one side, and the internal thread (106) is arranged in the inner cavity of the waveguide tube (103) on the other side.

7. The waveguide coaxial isolator resistant to magnetic field interference as claimed in claim 1, characterized in that: The inner cavities of the protective shell (101), the waveguide (103) and the protective cover (104) are all coated with an electromagnetic shielding agent, and the electromagnetic field shielding agent is an EMI shielding coating.

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