阅读说明：本技术 一种射频同轴强电磁脉冲防护方法及装置 (Radio frequency coaxial strong electromagnetic pulse protection method and device ) 是由 乔全宝 肖显利 胡见龙 于 2020-06-28 设计创作，主要内容包括：本发明涉及电磁脉冲防护的技术领域,尤其是涉及一种射频同轴强电磁脉冲防护方法及装置,该方法包括提供金属本体,在所述金属本体的腔体中设置有直流连通传输带线,所述直流连通传输带线中部设有突出部,其中,所述直流连通传输带线及其突出部与所述金属本体的腔体形成等效射频电容,所述直流连通传输带线与金属本体之间设有强瞬态电磁脉冲抑制器件,能在复杂和恶劣的电磁环境里为无线装备射频链路关键部位提供强电磁脉冲防护。(The invention relates to the technical field of electromagnetic pulse protection, in particular to a radio frequency coaxial strong electromagnetic pulse protection method and a device.)

1. The radio frequency coaxial strong electromagnetic pulse protection method is characterized by providing a metal body (1), arranging a direct current communication transmission strip line (2) in a cavity of the metal body (1), and arranging a protruding part (21) in the middle of the direct current communication transmission strip line (2), wherein the direct current communication transmission strip line (2) and the protruding part (21) thereof form an equivalent radio frequency capacitor with the cavity of the metal body (1).

2. The radio-frequency coaxial strong electromagnetic pulse protection device comprises a metal body (1), and a radio-frequency input port (11) and a radio-frequency output port (12) which are arranged at two ends of the metal body (1), and is characterized in that a cavity is formed in the metal body (1), a direct-current communication transmission strip line (2) is arranged in the cavity, one end of the direct-current communication transmission strip line (2) is connected with an input conductor (111) at the tail part of the radio-frequency input port (11), a protruding part (21) is arranged in the middle of the direct-current communication transmission strip line (2), and the other end of the direct-current communication transmission strip line (2) is connected with an output conductor (121) at the tail part of the radio-frequency output port (.

3. The radio frequency coaxial strong electromagnetic pulse protection device according to claim 2, wherein the cross section of the protrusion (21) is rectangular, square, semi-elliptical, oval or semicircular, and the direct current communication transmission band line (2) is single-section, two-section or multi-section.

4. The radio frequency coaxial strong electromagnetic pulse protection device according to claim 2, wherein a capacitor medium is formed by filling air or an insulating material between the inner wall of the cavity of the metal body (1) and the protrusion (21) of the direct current communication transmission strip line (2), so as to form a stable equivalent radio frequency capacitor.

5. The radio frequency coaxial strong electromagnetic pulse protection device according to claim 2, further comprising a first adjusting conductor (3) and a first pulse protection device (4), wherein one end of the first adjusting conductor (3) is connected to the input conductor (111), the other end of the first adjusting conductor (3) is connected to one end of the first pulse protection device (4), and the other end of the first pulse protection device (4) is connected to the metal body (1).

6. The radio frequency coaxial strong electromagnetic pulse protection device according to claim 5, further comprising a second adjusting conductor (6) and a second pulse protection device (7), wherein one end of the second adjusting conductor (6) is connected to the output conductor (121), the other end of the second adjusting conductor (6) is connected to one end of the second pulse protection device (7), and the other end of the second pulse protection device (7) is connected to the metal body (1).

7. The radio frequency coaxial strong electromagnetic pulse protection device according to claim 6, wherein the first pulse protection device (4) is a gas discharge tube, a transient suppression diode or a PIN diode, and the second pulse protection device (7) is a gas discharge tube, a transient suppression diode or a PIN diode.

8. The radio frequency coaxial strong electromagnetic pulse protection device according to claim 7, characterized in that a metal conductor plate (5) is further arranged between the first pulse protection device (4) or the second pulse protection device (7) and the metal body (1), and the metal conductor plate (5) is a circuit board monolithic conductor connected by a brass tin plate or a metallized via hole.

9. The radio-frequency coaxial strong electromagnetic pulse protection device according to claim 2, wherein the cavity side surface of the metal body (1) is smooth and in arc transition with the bottom surface, the cavity side surface is perpendicular to the bottom surface, the cavity side surface is an arc-shaped side wall, and the arc-shaped side wall is arc-shaped, right-angled arc-shaped, oval or elliptical.

10. The radio frequency coaxial strong electromagnetic pulse protection device according to claim 2, further comprising a metal cover plate (13) and a metal grounding screw hole (14), wherein the metal cover plate (13) covers the cavity to form a sealing structure, and the metal grounding screw hole (14) is opened on the metal body (1) or the metal cover plate (13).

Technical Field

The invention relates to the technical field of strong electromagnetic pulse protection, in particular to a radio frequency coaxial strong electromagnetic pulse protection method and device.

Background

With the wide application of various wireless devices and facilities in industrial and agricultural production, scientific research, foreign air exploration, national defense construction, homeland security defense and other engineering application fields, the transceiving systems of various wireless devices and facilities are placed in a complex electromagnetic environment. The wireless transceiver, especially the antenna and the coaxial feeder exposed outside the device, is very vulnerable to the intrusion of various transient strong electromagnetic pulses, and the various transient strong electromagnetic pulses are introduced into the wireless transceiver through the antenna or the feeder, so that the damage of key sensitive devices is caused, and the normal operation of the wireless transceiver is influenced.

At present, in the technical field of strong electromagnetic pulse protection, microsecond level slow speed leading edge strong electromagnetic pulse protection technology is relatively mature, and other types of fast leading edge strong electromagnetic pulse protection technologies of nanosecond level and below are still in a starting stage, how to provide effective strong electromagnetic pulse protection for key equipment on a radio frequency coaxial link is a technical problem and demand which are urgently needed to be solved in the field of strong transient electromagnetic pulse protection of the current radio frequency link.

Disclosure of Invention

The invention aims to provide a radio frequency coaxial strong electromagnetic pulse protection method which can provide strong electromagnetic pulse protection for key parts of a radio frequency link of wireless equipment in a complex and severe electromagnetic environment.

The above object of the present invention is achieved by the following technical solutions:

a radio frequency coaxial strong electromagnetic pulse protection method comprises the steps of providing a metal body, arranging a direct current communication transmission strip line in a cavity of the metal body, and arranging a protruding portion in the middle of the direct current communication transmission strip line, wherein the direct current communication transmission strip line and the protruding portion thereof and the cavity of the metal body form an equivalent radio frequency capacitor.

By adopting the technical scheme, the protruding part on the direct current communication transmission belt line and the cavity inner wall of the metal body form a stable equivalent radio frequency capacitor, because the curve-shaped section of the protruding part has the characteristic of stable radio frequency distributed capacitance in certain specific frequency bands, the protruding part and the cavity inner wall of the metal body are combined to form the stable equivalent radio frequency capacitor in the effective frequency band and other stable distribution parameters.

The invention also aims to provide a radio frequency coaxial strong electromagnetic pulse protection device which has the characteristics of simple structure, economy, applicability, good protection and shielding performance and the like.

The above object of the present invention is achieved by the following technical solutions:

a radio frequency coaxial strong electromagnetic pulse protection device comprises a metal body, a radio frequency input port and a radio frequency output port, wherein the radio frequency input port and the radio frequency output port are arranged at two ends of the metal body, a cavity is formed in the metal body, a direct current communication transmission strip line is arranged in the cavity, one end of the direct current communication transmission strip line is connected with an input conductor at the tail part of the radio frequency input port, a protruding part is arranged in the middle of the direct current communication transmission strip line, and the other end of the direct current communication transmission strip line (2) is connected with an output conductor at the tail part of the.

By adopting the technical scheme, the protruding part on the direct current communication transmission belt line and the cavity inner wall of the metal body form a stable equivalent radio frequency capacitor, because the curve-shaped section of the protruding part has the characteristic of stable radio frequency distributed capacitance in certain specific frequency bands, the protruding part and the cavity inner wall of the metal body are combined to form the stable equivalent radio frequency capacitor in the effective frequency band and other stable distribution parameters.

The present invention in a preferred example may be further configured to: the cross section of the protruding part is rectangular, square, semi-elliptical, oval or semicircular, and the direct current communication transmission belt line is single-section, two-section or multi-section.

By adopting the technical scheme, the direct current communication transmission strip line and the protruding parts on the direct current communication transmission strip line can form stable equivalent radio frequency capacitance and other stable distribution parameters with the cavity wall of the metal body, and the equivalent radio frequency capacitance and other stable distribution parameters constructed by the protruding parts in the shapes of rectangle, square, semiellipse, oval or semicircle and the like are more in line with the practical engineering application.

The present invention in a preferred example may be further configured to: and air or an insulating material is filled between the inner wall of the cavity of the metal body and the protruding part of the direct current communication transmission strip line to form a capacitance medium, so that a stable equivalent radio frequency capacitor is formed.

By adopting the technical scheme, the curve section of the protruding part has the characteristic of stable radio frequency distributed capacitance in certain specific frequency bands, and the protruding part and the inner wall of the cavity of the metal body form stable equivalent radio frequency capacitance and other stable distribution parameters in an effective frequency band.

The present invention in a preferred example may be further configured to: still include first regulation conductor and first pulse protection device, first regulation conductor one end is connected the input conductor, the first regulation conductor other end is connected first pulse protection device one end, the first pulse protection device other end is connected metal body.

By adopting the technical scheme, the strong electromagnetic pulse protection function can be realized by overlapping the first pulse protection device between the first adjusting conductor and the metal body.

The present invention in a preferred example may be further configured to: still include second regulation conductor and second pulse protection device, second regulation conductor one end is connected the output conductor, the second is adjusted the conductor other end and is connected second pulse protection device one end, the second pulse protection device other end is connected metal body.

By adopting the technical scheme, the strong electromagnetic pulse protection function can be realized by overlapping the second pulse protection device between the second adjusting conductor and the metal body.

The present invention in a preferred example may be further configured to: the first pulse protection device is a gas discharge tube, a transient suppression diode or a PIN diode, and the second pulse protection device is a gas discharge tube, a transient suppression diode or a PIN diode.

By adopting the technical scheme, the first pulse protection device or the second pulse protection device adopts transient strong electromagnetic pulse suppression devices such as a gas discharge tube, a transient suppression diode or a PIN diode tube stack and the like, is applied to various radio frequency links, improves the reliability of various radio frequency links, and can effectively prevent strong electromagnetic pulses from intruding and impacting key parts or equipment on the radio frequency coaxial link.

The present invention in a preferred example may be further configured to: and a metal conductor plate is further arranged between the first pulse protection device or the second pulse protection device and the metal body, and the metal conductor plate is formed by a brass tin plate or a whole conductor of a circuit board connected with a metalized through hole.

By adopting the technical scheme, the metal conductor plate is composed of the whole conductors such as the brass tin plate and the circuit board connected with the metallized through hole, the metal conductor plate is fixed at the bottom of the cavity of the metal body by the metal screw to form good grounding, and the grounding end of the pulse protection device is pulled down to the metal conductor plate to form a grounding discharge channel.

The present invention in a preferred example may be further configured to: the side surface of the cavity of the metal body is smooth and in arc transition with the bottom surface, the side surface of the cavity is perpendicular to the bottom surface, the side surface of the cavity is an arc-shaped side wall, and the arc-shaped side wall is arc-shaped, right-angle arc-shaped, oval or elliptical.

By adopting the technical scheme, the right-angle circular arc and the circular arc cavity are processed easily in the aspects of difficulty, cost and manufacturability of mechanical processing, and the radio frequency parameters of the protection device are convenient to debug; an equivalent radio frequency capacitor is constructed by utilizing a mechanical structure, and the aim of reducing the influence of the parasitic stray parameters of the grounding on the circuit performance is fulfilled through optimization.

The present invention in a preferred example may be further configured to: the metal grounding screw hole is formed in the metal body or the metal cover plate.

Through adopting above-mentioned technical scheme, metal covering plate can play fine sealed and shielding effect, and metal cavity and metal covering plate constitute whole metal seal structure together, can improve protector's electromagnetic shielding performance and ground connection performance can spiro union metal bolt on the metal ground connection screw, it is convenient to be connected to metal bolt again protector carries out ground connection and handles, makes protector has advantages such as compact structure, leakproofness are good, shielding performance is good, can install on all kinds of electronics, electrical equipment and facility nimble reliably, can improve protector's electromagnetic shielding performance and ground connection performance.

In summary, the invention includes at least one of the following beneficial technical effects:

1. the protruding part on the direct current communication transmission strip line and the inner wall of the cavity of the metal body form a stable equivalent radio frequency capacitor, and the protruding part and the inner wall of the cavity of the metal body are combined to form a stable equivalent radio frequency capacitor and other stable distribution parameters in an effective frequency band because the curve-shaped section of the protruding part has the characteristic of stable radio frequency distribution capacitor in certain specific frequency bands;

2. the shielding structure has the advantages of simple and compact structure, economy and applicability, good dense shielding performance, good protective performance and the like;

3. the electromagnetic pulse protection circuit can provide strong electromagnetic pulse protection for wireless radio frequency electronics, electrical equipment and facilities in complex and severe electromagnetic environments, simplifies circuits, saves cost and meets the requirements of engineering application practice.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the protection device of the present invention.

Fig. 2 is a schematic structural view of another embodiment of the protection device of the present invention.

Fig. 3 is a schematic structural view of another embodiment of the protection device of the present invention.

Fig. 4 is a schematic structural diagram of the appearance of the protective device of the invention.

In the figure, 1, a metal body, 11, a radio frequency input port, 111, an input conductor, 12, a radio frequency output port, 121, an output conductor, 13, a metal cover plate, 14, a ground screw hole, 2, a direct current communication transmission belt line, 21, a protrusion, 3, a first adjusting conductor, 4, a first pulse protection device, 5, a metal conductor plate, 6, a second adjusting conductor, 7 and a second pulse protection device.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

The invention provides a radio frequency coaxial strong electromagnetic pulse protection method, which comprises the steps of providing a metal body 1, arranging a direct current communication transmission strip line 2 in a cavity of the metal body 1, and arranging a protruding part 21 in the middle of the direct current communication transmission strip line 2, wherein the direct current communication transmission strip line 2 and the protruding part 21 thereof form a stable equivalent radio frequency capacitor with the cavity of the metal body 1.

Referring to fig. 1, the invention further provides a radio frequency coaxial strong electromagnetic pulse protection device, which comprises a metal body 1, and a radio frequency input port 11 and a radio frequency output port 12 which are arranged at two ends of the metal body 1, wherein the metal body 1 is provided with a cavity, a direct current communication transmission strip line 2 is arranged in the cavity, one end of the direct current communication transmission strip line 2 is connected with an input conductor 111 at the tail part of the radio frequency input port 11, a protruding part 21 is arranged in the middle part of the direct current communication transmission strip line 2, and the other end of the direct current communication transmission strip line 2 is connected with an output conductor 121 at the tail part of the radio frequency output port 12.

In this embodiment, the dc link transmission strip 2 is a strip transmission line, and is disposed in the cavity of the metal body 1, and the dc link transmission strip 2 is bent to form the protruding portion 21, and air or other stable insulating material is filled between the inner wall of the cavity of the metal body 1 and the protruding portion 21 of the dc link transmission strip 2 to form a capacitance medium to form a stable equivalent rf capacitor, because the curved section of the protruding portion 21 itself has stable rf distribution capacitance characteristics in some specific frequency bands, the protruding portion 21 and the inner wall of the cavity of the metal body 1 form stable equivalent rf capacitors and other stable distribution parameters in an effective frequency band.

The cross section of the protruding part 21 is rectangular, square, semi-elliptical, oval or semicircular, the direct current communication transmission belt line 2 and the protruding part 21 thereof can form stable equivalent radio frequency capacitance and other stable distribution parameters with the inner wall of the metal body 1, and the equivalent radio frequency capacitance and other stable distribution parameters constructed by the protruding parts in the shapes of rectangle, square, semi-elliptical, oval or semicircular and the like are more in line with the practical application of engineering. According to actual needs, different working frequency bands need different distribution parameters and different distribution capacitances, so the direct current communication transmission band line 2 can be a single section, or can be composed of two or more sections, so as to obtain equivalent radio frequency capacitances with different distribution parameters needed by the working frequency bands.

The inner wall (the side surface and the bottom surface) of the cavity of the metal body 1 is smooth and in arc transition, the side surface of the cavity is vertical to the bottom surface, the side surface of the cavity is an arc-shaped side wall, and the arc-shaped side wall can be arc-shaped, right-angle arc-shaped, oval or elliptical and the like; an equivalent radio frequency capacitor is constructed by utilizing a mechanical structure, and the aim of reducing the influence of the parasitic stray parameters of the grounding on the circuit performance is fulfilled through optimization.

Referring to fig. 2, the pulse protection device further includes a first adjustment conductor 3 and a first pulse protection device 4, one end of the first adjustment conductor 3 is connected to the input conductor 111, the other end of the first adjustment conductor 3 is connected to one end of the first pulse protection device 4, and the other end of the first pulse protection device 4 is connected to the metal body 1.

Referring to fig. 3, the pulse protection device further includes a second regulation conductor 6 and a second pulse protection device 7, one end of the second regulation conductor 6 is connected to the output conductor 121, the other end of the second regulation conductor 6 is connected to one end of the second pulse protection device 7, and the other end of the second pulse protection device 7 is connected to the metal body 1.

The direct current communication transmission strip line 2 with the protruding part 21 is directly lapped with the 50 ohm radio frequency input port 11 and the radio frequency output port 12 at two ends of the metal body 1 to form a direct current physical channel, and the direct current physical channel is assembled in the cavity of the metal body 1 and can be used for transmitting direct current signals. The metal body 1, the direct current communication transmission strip line 2, the first adjusting conductor 3, the first pulse protection device 4, the second adjusting conductor 6 and the second pulse protection device 7 form a radio frequency selection resonant network together, and a radio frequency matching network and a three-dimensional radio frequency circuit with minimum parasitic parameters and optimal radio frequency performance parameters are formed; distribution parameters among the devices determine basic working frequency band, bandwidth, impedance matching and radio frequency performance of the protection device, and can meet radio frequency signal transmission of corresponding working bandwidth, and according to actual engineering sample tests, the cavity inner structure of the metal body 1 can be matched with each device to achieve excellent radio frequency performance parameters such as working frequency bandwidth (BW is more than or equal to 2 GHz), small standing wave coefficient (VSWR is less than or equal to 1.3: 1) and small loss (less than or equal to 0.3 dB). The method can provide strong electromagnetic pulse protection for the radio frequency link in the DC-8GHz frequency band, and improve the strong electromagnetic pulse protection performance and reliability of wireless equipment and systems. The method is applied to various radio frequency links, improves the reliability of the various radio frequency links, and can effectively prevent the strong electromagnetic pulse from intruding and impacting key parts or equipment on the radio frequency coaxial link.

With continued reference to fig. 2 and 3, a metal conductor plate 5 is further provided between the first pulse protection device 4 or the second pulse protection device 7 and the metal body 1. The metal conductor plate 5 is composed of a whole conductor such as a brass tin plate and a circuit board connected with a metallized via hole, and is fixed at the bottom of the cavity of the metal body 1 by a metal screw, and is in close contact with the bottom of the cavity of the metal body 1 to form a good grounding, and the grounding end of the first pulse protection device 4 or the second pulse protection device 7 is pulled down to the metal conductor plate 5 to form a grounding discharge channel.

The first pulse protection device 4 or the second pulse protection device 7 adopts transient strong electromagnetic pulse suppression devices such as a gas discharge tube, a transient suppression diode or a PIN diode tube stack and the like, is applied to various radio frequency links, improves the reliability of various radio frequency links, and can effectively prevent strong electromagnetic pulses from intruding and impacting key parts or equipment on a radio frequency coaxial link. The first pulse protection device 4 and the second pulse protection device 7 are both disposed on the metal conductor plate 5.

Referring to fig. 4, in this embodiment, the radio frequency coaxial strong electromagnetic pulse protection device further includes a metal cover plate 13 and a metal grounding screw hole 14, the metal cover plate 13 covers the cavity to form a sealing structure, and the metal grounding screw hole 14 is opened on the metal body 1 or the metal cover plate 13.

The metal cover plate can play fine sealed and shielding effect, and metal body and metal cover plate constitute whole metal seal structure together, protector's shell is the hermetically-sealed metal construction, can improve protector's electromagnetic shielding performance and ground connection performance can spiro union metal bolt on the metal ground connection screw is connected to ground, and is convenient again metal bolt carries out ground connection and handles.

The fixed positions of the joint surfaces of the radio frequency input port 11, the radio frequency output port 12 and the metal body 1 are provided with waterproof grooves for placing O-shaped waterproof conductive rubber rings, the waterproof grooves can be fixed with the metal body by adopting flange plate fixing, extrusion close fit compression joint or thread fit technology, and waterproof design is also adopted between the metal body and the metal cover plate. Therefore, the protective device has the advantages of compact structure, simplicity, convenience, good sealing performance, good shielding performance and the like, and can be flexibly and reliably installed and grounded on various electronic and electrical equipment and facilities.

The device can provide strong electromagnetic pulse protection for the radio frequency link in the DC-8GHz frequency band, and improve the strong electromagnetic pulse protection performance and reliability of wireless equipment and systems. The method is applied to various radio frequency links, improves the reliability of the various radio frequency links, and can effectively prevent the strong electromagnetic pulse from intruding and impacting key parts or equipment on the radio frequency coaxial link.