A network link electromagnetic pulse suppression device

Abstract

The utility model provides a kind of network link electromagnetic pulse suppression device, comprising: suppression component, the suppression component includes: glass discharge tube, for bearing high voltage pulse and preliminary limiting pulse current;Coupled to glass discharge tube, for further inhibiting the low pass filter of high frequency electromagnetic pulse;Coupled to filter component, for the final limiting of residual pulse after filtering ESD static diode;Adopt glass discharge tube as first limiting element, can bear high voltage pulse and preliminary limiting pulse current, protect subsequent circuit;Adopt low pass filter as filter circuit, can further inhibit high frequency electromagnetic pulse, improve protection effect;Adopt ESD static diode as second limiting element, can to the final limiting of residual pulse after filtering, ensure the safety of network link.

Description

Technical Field

[0001] This application relates to the field of network link protection technology, and in particular to a network link electromagnetic pulse suppression device. Background Technology

[0002] In modern communication systems, network links are a crucial component for data transmission. However, network links are susceptible to data transmission interruption, equipment damage, or communication failure when subjected to electromagnetic pulse (EMP) attacks. An EMP is a high-intensity electromagnetic radiation capable of generating enormous electromagnetic energy in a short period, causing severe damage to electronic equipment. Therefore, developing a network link suppression device that can effectively suppress EMPs is of significant practical importance. Utility Model Content

[0003] This invention provides a network link electromagnetic pulse suppression device to at least solve the problem of network links being subjected to electromagnetic pulses in related technologies.

[0004] According to one embodiment of the present invention, a network link electromagnetic pulse suppression device includes: a suppression component, the suppression component comprising: Includes glass discharge tubes, used to withstand high-voltage pulses and initially limit pulse current; A low-pass filter coupled to a glass discharge tube for further suppression of high-frequency electromagnetic pulses; An ESD diode coupled to a filter assembly for final limiting of the residual pulse after filtering.

[0005] Furthermore, the low-pass filter includes an inductor and a capacitor coupled to the inductor.

[0006] Furthermore, each set of the suppression components includes two glass discharge tubes, three inductors and four capacitors coupled to the glass discharge tubes, and one ESD diode coupled to the inductors and capacitors.

[0007] Furthermore, the glass discharge tube is a glass discharge tube of model RLM501-141N.

[0008] Furthermore, the ESD diode is an ESD diode with model number RLST363A054UV.

[0009] Furthermore, it also includes two connectors, which are coupled to the glass discharge tube, the low-pass filter, and the ESD diode.

[0010] This invention employs a glass discharge tube as the first limiting element, capable of withstanding high-voltage pulses and initially limiting pulse current to protect subsequent circuits. A low-pass filter is used as the filtering circuit to further suppress high-frequency electromagnetic pulses, improving the protection effect. An ESD diode is used as the second limiting element to finally limit the residual pulses after filtering, ensuring the security of the network link. This network link electromagnetic pulse suppression device, through its three-level protection design, effectively suppresses the conduction of electromagnetic pulses, protecting the network link from electromagnetic pulse attacks. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 The overall circuit diagram provided for the embodiments of this application.

[0012] In the diagram, TV1 is the first glass discharge tube; TV2 is the second glass discharge tube; TV3 is the third glass discharge tube; TV4 is the fourth glass discharge tube; TV5 is the fifth glass discharge tube; TV6 is the sixth glass discharge tube; TV7 is the seventh glass discharge tube; TV8 is the eighth glass discharge tube; C1 is the first capacitor; C4 is the second capacitor; C7 is the third capacitor; C10 is the fourth capacitor; C13 is the fifth capacitor; C14 is the sixth capacitor; C15 is the seventh capacitor; C16 is the eighth capacitor; C17 is the ninth capacitor; C1 8. Tenth capacitor; C19. Eleventh capacitor; C20. Twelfth capacitor; C22. Thirteenth capacitor; C24. Fourteenth capacitor; C26. Fifteenth capacitor; C28. Sixteenth capacitor; C29. Seventeenth capacitor; C30. Eighteenth capacitor; C31. Nineteenth capacitor; C32. Twentieth capacitor; C33. Twenty-first capacitor; C34. Twenty-second capacitor; C35. Twenty-third capacitor; C36. Twenty-fourth capacitor; C37. Twenty-fifth capacitor; C38. Twenty-sixth capacitor; C39. Second capacitor; Capacitor 17; C40, Capacitor 28; C41, Capacitor 29; C42, Capacitor 30; C43, Capacitor 31; C44, Capacitor 32; L1, Inductor 1; L2, Inductor 2; L3, Inductor 3; L4, Inductor 4; L5, Inductor 5; L6, Inductor 6; L7, Inductor 7; L8, Inductor 8; L9, Inductor 9; L10, Inductor 10; L11, Inductor 11; L12, Inductor 12; L13, Inductor 13; L14, Inductor 14 L15, Fifteenth Inductor; L16, Sixteenth Inductor; L17, Seventeenth Inductor; L19, Eighteenth Inductor; L20, Nineteenth Inductor; L22, Twentieth Inductor; L23, Twenty-first Inductor; L25, Twenty-second Inductor; L26, Twenty-third Inductor; L28, Twenty-fourth Inductor; D1, First ESD Diode; D2, Second ESD Diode; D3, Third ESD Diode; D4, Fourth ESD Diode; U1, First Connector; U2, Second Connector. Detailed Implementation

[0013] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0014] Example: Refer to Figure 1As shown, a network link electromagnetic pulse suppression device includes four sets of suppression components and two connectors coupled to the four sets of suppression components. The four sets of suppression components have identical structures. Each set of suppression components includes: a first limiting component for withstanding high-voltage pulses and initially limiting the pulse current; a filtering component coupled to the first limiting component for further suppressing high-frequency electromagnetic pulses; and a second limiting component coupled to the filtering component for final limiting of the residual pulse after filtering. The first limiting component includes a glass discharge tube, the filtering component includes an inductor and a capacitor coupled to the inductor, and the second limiting component includes an ESD diode.

[0015] To meet the requirements of the network link electromagnetic pulse suppression device, the operating frequency range is 250MHz, the characteristic impedance is 120Ω, the suppression isolation needs to reach 34dB, and the input peak current needs to be ≥8.3A. Since the operating frequency is 250MHz, varistors and TVS diodes with high junction capacitance are not suitable for the first-stage limiting element; due to the high peak current of 8.3A, ESD diodes and PIN diodes are not suitable. Therefore, the first limiting component of the RF intermediate frequency protection device is ultimately selected as a glass discharge tube. This includes eight glass discharge tubes: TV1, TV2, TV3, TV4, TV5, TV6, TV7, and TV8.

[0016] Due to the significant overlap in operating frequency bands between ultra-wideband electromagnetic pulse (UMP) and data transmission protection devices, a low-pass filter is suitable for the filter circuit selection. To achieve sufficient isolation and suppression, the filter must employ a 7-stage structure, with three sets of 30nH inductors connected in series in each loop, and a 22pF or 40pF capacitor connected in parallel across each inductor to achieve overall filter suppression. This results in insertion loss ≤0.094dB below 249.5MHz and isolation suppression ≥39.4dB above 399.7MHz. In this embodiment, there are 32 capacitors, namely, capacitor C1, capacitor C4, capacitor C7, capacitor C10, capacitor C13, capacitor C14, capacitor C15, capacitor C16, capacitor C17, capacitor C18, capacitor C19, capacitor C20, capacitor C22, capacitor C24, capacitor C26, capacitor C28, capacitor C29, capacitor C30, capacitor C31, capacitor C32, capacitor C33, capacitor C34, capacitor C35, capacitor C36, capacitor C37, capacitor C38, capacitor C39, capacitor C40, capacitor C41, capacitor C42, capacitor C43, and capacitor C44.

[0017] The inductors include the first inductor L1, the second inductor L2, the third inductor L3, the fourth inductor L4, the fifth inductor L5, the sixth inductor L6, the seventh inductor L7, the eighth inductor L8, the ninth inductor L9, the tenth inductor L10, the eleventh inductor L11, the twelfth inductor L12, the thirteenth inductor L13, the fourteenth inductor L14, the fifteenth inductor L15, the sixteenth inductor L16, the seventeenth inductor L17, the eighteenth inductor L19, the nineteenth inductor L20, the twentieth inductor L22, the twenty-first inductor L23, the twenty-second inductor L25, the twenty-third inductor L26, and the twenty-fourth inductor L28.

[0018] For the second limiting element, since a TVS diode has already been selected, and considering that the peak current of the ultra-wideband electromagnetic field has been limited in the first stage, ESD diodes are chosen as the second limiting element. There are four ESD diodes: D1, D2, D3, and D4. To achieve better limiting performance, the ESD diodes must meet the following requirements: the peak current withstand capability should be ≥1.66A; the forward voltage should be ≥3.3V; and since the data circuit consists of two pairs of wires, the ESD diodes should be bipolar or quadrupole. Based on these technical parameters, the RLST363A054UV ESD diode is selected as the second-stage limiting element.

[0019] The connector consists of two connectors, namely the first connector U1 and the second connector U2. Considering the coastal environment with high humidity and high salt content in the air, ordinary connections are not reliable enough. Therefore, we selected the M12X type connector as the connector for the data protection device. The connector is connected to the PCB using XH2.548PIN terminals.

[0020] In this embodiment, the eight pins of the two connectors are interconnected, and each pair of connecting lines connects to a set of suppression components. The anodes of the eight glass discharge tubes, namely the first glass discharge tube TV1, the second glass discharge tube TV2, the third glass discharge tube TV3, the fourth glass discharge tube TV4, the fifth glass discharge tube TV5, the sixth glass discharge tube TV6, the seventh glass discharge tube TV7, and the eighth glass discharge tube TV8, are respectively connected to the corresponding input signal lines, while the cathodes are connected to the ground line.

[0021] The capacitors C1 (first), C4 (second), C7 (third), C10 (fourth), C13 (fifth), C14 (sixth), C15 (seventh), C16 (eighth), C17 (ninth), C18 (tenth), C19 (eleventh), C20 (twelfth), C22 (thirteenth), C24 (fourteenth), C26 (fifteenth), C28 (sixteenth), C29 (seventeenth), C30 (eighteenth), C31 (nineteenth), C32 (twentieth), C33 (twenty-first), C34 (twenty-second), C35 (twenty-fourth), C36 (twenty-fifth), C37 (twenty-sixth), C38 (twenty-seventh), C39 (twenty-eighth), C40 (twenty-ninth), C41 (twenty-ninth), C42 (thirtieth), C43 (thirty-first), and C44 (thirty-second) are connected in parallel between their respective signal lines and ground lines for filtering and suppressing high-frequency interference.

[0022] The inductors L1, L2, L3, L4, L5, L6, L7, L8, L9, L10, L11, L12, L13, L14, L15, L16, L17, L19, L20, L22, L23, L25, L26, and L28 are connected in series on their respective signal lines to form a low-pass filter, blocking high-frequency interference signals from passing through.

[0023] The first ESD diode D1, the second ESD diode D2, the third ESD diode D3, and the fourth ESD diode D4 are connected to the corresponding signal lines with their anodes and to the ground line with their cathodes, to provide electrostatic protection.

[0024] In this embodiment, to reduce the inductance of component pins, surface mount technology (SMT) is used in the design, and all components are mounted in a surface mount manner. Furthermore, due to the high speed of Gigabit Ethernet, PCB routing should be performed using differential routing, and the difference in conductor length between each differential pair should not exceed 4mm.

[0025] This embodiment uses a glass discharge tube as the first limiting element, which can withstand high-voltage pulses and initially limit the pulse current, protecting subsequent circuits. A low-pass filter is used as the filtering circuit to further suppress high-frequency electromagnetic pulses and improve the protection effect. An ESD diode is used as the second limiting element to finally limit the residual pulses after filtering, ensuring the security of the network link. This utility model's network link electromagnetic pulse suppression device, through its three-level protection design, can effectively suppress the conduction of electromagnetic pulses and protect the network link from electromagnetic pulse attacks.

[0026] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms are interchangeable where appropriate; this is merely a way of distinguishing objects with the same attributes in the embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of elements is not necessarily limited to those elements, but may include other elements not explicitly listed or inherent to those processes, methods, products, or apparatuses.

[0027] The terminology used in the embodiments of this application is for the purpose of describing specific embodiments only and is not intended to limit the present invention. The singular forms "a," "the," and "the" used in the embodiments of this application are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that in the description of this application, unless otherwise stated, " / " indicates that the objects before and after are in an "or" relationship; for example, A / B can represent A or B. "And / or" in this application is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone, where A and B can be singular or plural.

[0028] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrase “if determination” or “if detection (of the condition or event of the statement)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the condition or event of the statement)” or “in response to detection (of the condition or event of the statement).”

[0029] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A network link electromagnetic pulse suppression device, characterized in that, include: Suppression component, the suppression component comprising: Includes glass discharge tubes, used to withstand high-voltage pulses and initially limit pulse current; A low-pass filter coupled to a glass discharge tube for further suppression of high-frequency electromagnetic pulses; An ESD diode coupled to the filter assembly for final limiting of the filtered residual pulse; the low-pass filter includes an inductor and a capacitor coupled to the inductor.

2. The network link electromagnetic pulse suppression device according to claim 1, characterized in that, Each set of the suppression components includes two glass discharge tubes, three inductors and four capacitors coupled to the glass discharge tubes, and one ESD diode coupled to the inductors and capacitors.

3. The network link electromagnetic pulse suppression device according to claim 1, characterized in that, The glass discharge tube is a model RLM501-141N glass discharge tube.

4. The network link electromagnetic pulse suppression device according to claim 3, characterized in that, The ESD diode is an ESD diode with model number RLST363A054UV.

5. The network link electromagnetic pulse suppression device according to claim 1, characterized in that, It also includes two connectors, which are coupled to the glass discharge tube, the low-pass filter, and the ESD diode.

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