Hundred-megabit Ethernet signal filter with lightning protection function

Abstract

The utility model relates to the technical field of filters, and discloses a lightning protection 100M Ethernet signal filter, which comprises filter cavities, a four-core aviation connector base, a PCB (Printed Circuit Board), a grounding bolt, a conductive nut, a lead, a conductive column and epoxy resin, high-temperature soldering tin is welded to the end of the PCB, and the PCB is provided with a lightning stroke surge electromagnetic protection and filter circuit composed of a ceramic gas discharge tube, a resistor, a capacitance reduction diode, a semiconductor discharge tube, a monolithic capacitor, an inductor, a bypass capacitor and a transient suppression diode. Compared with the prior art, the utility model has the advantages that the circuit has two functions of signal filtering and lightning surge electromagnetic pulse protection.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a 100M Ethernet signal filter with lightning protection function. Background Technique

[0002] Lightning electromagnetic pulse is a very strong interference source. There are various interference transmission paths of lightning electromagnetic pulse. One of them is the lightning strike between clouds or the lightning strike on nearby objects, which generates a strong electromagnetic field. It induces relatively high voltage and current in buildings and conductors and radiates outward along the conductive channels.

[0003] The 100M Ethernet signal filter is a passive filter network composed of capacitors, inductors and resistors. One end of the filter is connected to the input signal, and the other end is connected to the network terminal device. The principle of the 100M Ethernet signal filter is to filter out the invalid signal interference and only retain the valid signal for transmission. The main function of the 100M Ethernet signal filter is to solve the electromagnetic interference problem coupled from space to the wire harness, such as the electromagnetic interference of other devices on the network terminal device, etc. The 100M Ethernet signal lightning surge protection module is a passive lightning protection network composed of ceramic gas discharge tubes and resistors. This protection module can solve the problem of super strong electromagnetic interference coupled from space to the wire harness, such as the strong electromagnetic interference radiated by lightning to the Ethernet wire harness, which may cause damage to the network terminal device.

[0004] At present, the 100M Ethernet lightning surge protection module or the 100M Ethernet filter on the market all have single functions. How to develop a 100M Ethernet signal filter with both signal filtering and lightning surge electromagnetic pulse protection functions is one of the research directions in the fields of lightning arresters and filters. Content of the Utility Model

[0005] (1). Technical Problems to be Solved

[0006] The technical problem to be solved by the utility model is that currently, the 100M Ethernet lightning surge protection module or the 100M Ethernet filter only has a single function, and lightning will generate strong electromagnetic interference on the Ethernet wire harness, which may cause damage to the network terminal device.

[0007] (2). Technical Solutions

[0008] To solve the above technical problems, the technical solution provided by the present utility model is: a hundred-megabit Ethernet signal filter with lightning protection function, which includes a filter cavity, a four-core aviation connector base, a PCB circuit board, a grounding bolt, a conductive nut, a wire, a conductive column and epoxy resin. The filter cavity is matched with the four-core aviation connector base, and the wire is led out and welded to the end of the PCB circuit board using high-temperature solder. The PCB circuit board is provided with a lightning surge electromagnetic protection and filtering circuit composed of a ceramic gas discharge tube, a resistor, a derating diode, a semiconductor discharge tube, a monolithic capacitor, an inductor, a bypass capacitor, and a transient suppression diode.

[0009] As an improvement, the filter cavity is made of a metal material with high conductivity.

[0010] As an improvement, the openings of the Ethernet signal input end and output end of the filter cavity are matched with the size of the four-core aviation connector base.

[0011] As an improvement, the wiring terminals of the four-core aviation connector base and the wire are welded using high-temperature solder.

[0012] As an improvement, the ground of the PCB circuit board is tightly connected to the conductive column of the filter cavity, and the PCB circuit board, the conductive nut and the conductive column are welded together using high-temperature solder, which can enhance the conductivity and further reduce the conduction impedance.

[0013] As an improvement, the filter cavity is potted with epoxy resin to avoid bubbles and holes in the epoxy resin.

[0014] (III) Beneficial effects

[0015] The advantages of the present utility model compared with the prior art are as follows: the hundred-megabit Ethernet signal filter of the present utility model has both signal filtering and lightning surge electromagnetic pulse protection functions, with a simple structure, small size, light weight and good lightning surge electromagnetic pulse protection effect, and can be widely applied to the field of hundred-megabit Ethernet communication. Description of the drawings

[0016] Figure 1 is the structural schematic diagram of a hundred-megabit Ethernet signal filter with lightning protection function of the present utility model Figure 1 .

[0017] Figure 2 is the structural schematic diagram of a hundred-megabit Ethernet signal filter with lightning protection function of the present utility model Figure 2 .

[0018] Figure 3 is the circuit diagram of the PCB circuit board of a hundred-megabit Ethernet signal filter with lightning protection function of the present utility model.

[0019] As shown in the figure: 1. Filter cavity; 2. Four-core aviation connector base; 3. PCB circuit board; 4. Grounding bolt; 5. Conductive nut; 6. High-temperature solder; 7. Wire; 8. Conductive post; 9. Epoxy resin. Detailed implementation

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] When the present invention is specifically implemented, as Figure 1 , Figure 2 shown in the structural schematic diagram, a 100M Ethernet signal filter with lightning protection includes a filter cavity 1, a four-core aviation connector base 2, a PCB circuit board 3, a grounding bolt 4, a conductive nut 5, a wire 7, a conductive post 8, and an epoxy resin 9; the filter cavity 1 cooperates with the four-core aviation connector base 2, the grounding bolt 4, and the conductive post 8. The four-core aviation connector base 2 is connected to the PCB circuit board 3 by a wire 7. The PCB circuit board 3 is fixed by the conductive post 8 and the conductive nut 5 of the filter cavity 1, and the ground of the PCB circuit board 3 is welded to the conductive nut 5 and the conductive post 8 using high-temperature solder 6.

[0022] As a preferred embodiment of the present invention, the PCB circuit board 3 in the present invention uses SMT soldering, that is, electronic components are directly soldered on the PCB circuit board 3 by reflow soldering, and the wire 7 connecting each component is replaced by the PCB circuit board 3.

[0023] As Figure 3 shown in the circuit schematic diagram of the present invention, the TX+_In, TX-_In, RX+_In, and RX-_In of the present invention are connected to the four-core aviation connector base 2 of the input signal, and the TX+_Out, TX-_Out, RX+_Out, and RX-_Out are connected to the four-core aviation connector base 2 of the output signal. The PE is connected to the grounding bolt 4 through the conductive post 8, the conductive nut, the high-temperature solder 6, and the filter cavity 1; the grounding bolt 4 is connected to the ground. The ceramic gas discharge tube (GDT) constitutes the first-stage lightning protection circuit, the semiconductor discharge tube (TSS) and the derating diode (D) constitute the second-stage lightning protection circuit, the transient suppression diode (TVS) constitutes the third-stage lightning protection circuit, the monolithic capacitor, inductor, and bypass capacitor constitute the first-stage filtering, and the capacitors and inductors in the PCB circuit board 3 are alternately placed in sequence to constitute multi-stage filtering, having the functions of signal filtering and protecting against lightning surge electromagnetic pulses.

[0024] It should be noted that, in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0025] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

[0026] The above description of the present utility model and its embodiments is not restrictive. What is shown in the drawings is only one of the embodiments of the present utility model, and the actual structure is not limited thereto. In general, if those of ordinary skill in the art are inspired by it and, without departing from the purpose of the creation of the present utility model, design similar structural modes and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present utility model.

Claims

1. A lightning protection 100M Ethernet signal filter, characterized by: A lightning protection 100M Ethernet signal filter comprises a filter cavity (1), a four-core aviation connector base (2), a PCB circuit board (3), a grounding bolt (4), a conductive nut (5), a wire (7), a conductive column (8) and an epoxy resin (9). The filter cavity (1) is matched with the four-core aviation connector base (2), the wire (7) is led out and soldered to the end of the PCB circuit board (3) using high-temperature solder, and the PCB circuit board (3) is provided with a lightning surge electromagnetic protection and filtering circuit composed of a ceramic gas discharge tube, a resistor, a capacity reduction diode, a semiconductor discharge tube, a monolithic capacitor, an inductor, a bypass capacitor and a transient suppression diode.

2. The lightning protection filter for 100M Ethernet signals according to claim 1, characterized in that: The filter cavity (1) is made of a high-conductivity metal material.

3. The lightning protection filter for 100M Ethernet signals according to claim 1, characterized in that: The openings of the Ethernet signal input end and the output end of the filter cavity (1) match the size of the four-core aviation connector base (2).

4. The lightning protection filter for 100M Ethernet signals according to claim 1, characterized in that: The connection terminals of the four-core aviation connector base (2) and the wires (7) are welded using high-temperature solder (6).

5. The lightning protection filter for 100M Ethernet signals according to claim 1, characterized in that: The ground of the PCB circuit board (3) is tightly connected to the conductive column (8) of the filter cavity (1), and the PCB circuit board (3), the conductive nut (5) and the conductive column (8) are welded together using high-temperature solder (6).

6. The lightning protection filter for 100M Ethernet signals according to claim 1, characterized in that: The filter cavity (1) is potted with epoxy resin (9).

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