CN201983706U - Antenna feed electromagnetic pulse protector - Google Patents
Antenna feed electromagnetic pulse protector Download PDFInfo
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- CN201983706U CN201983706U CN2010206896284U CN201020689628U CN201983706U CN 201983706 U CN201983706 U CN 201983706U CN 2010206896284 U CN2010206896284 U CN 2010206896284U CN 201020689628 U CN201020689628 U CN 201020689628U CN 201983706 U CN201983706 U CN 201983706U
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- electromagnetic pulse
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- discharge tube
- gas
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Abstract
The utility model discloses an antenna feed electromagnetic pulse protector for preventing the damage of electronic devices caused by antenna coupling. The antenna feed electromagnetic pulse protector comprises the following components: an interface; a discharge tube; and a housing; wherein the discharge tube is electrically connected with the interface and the housing. In using, the interface is electrically connected with the outer antenna, and is parallelly connected with an outer protected device which is connected with the antenna.
Description
Technical field
The utility model relates to a kind of electromagnetic pulse protector, more specifically, relates to a kind of antenna feeder electromagnetic pulse protector.
Background technology
Following IT-based warfare, the electromagnetic environment that weaponry faces will be very complicated, equipment interference such as radar, radio communication of weapon platform self etc. is not only arranged, also to face between ourselves and the enemy electronic countermeasure and the electromagnetic interference of electromagnetic pulse bullet, high power microwave weapon, also have thunder and lightning, electrostatic interference in addition, this makes the electromagnetic environment in high-tech battlefield be tending towards abominable and complicated.Should possess adaptive capacity as the military electronics shelter of communication and command system to complex electromagnetic environment.And at present domesticly also do not have effectively to improve the ability that weaponry is tackled complicated galvanomagnetic-effect environment, and realize the product of good economic benefit.
Summary of the invention
The purpose of this utility model provides a kind of antenna feeder electromagnetic pulse protector, effectively improves the ability that weaponry is tackled complicated galvanomagnetic-effect environment, and realizes good economic benefit.
The utility model discloses a kind of antenna feeder electromagnetic pulse protector, is used to prevent because the damage of the electronic devices that the antenna coupling causes etc.This antenna feeder electromagnetic pulse protector comprises: interface; Discharge tube; And housing; Wherein said discharge tube is electrically connected with described interface and described housing; Wherein in use, described interface is electrically connected with the antenna of outside, and in parallel with the protected equipment that is connected to described antenna of outside.
Preferably, described protected equipment is radio-frequency apparatus.
Preferably, described discharge tube is a gas-discharge tube.
Preferably, described gas-discharge tube is the two poles of the earth mounted type gas-discharge tubes.
Description of drawings
By the detailed description of exemplary embodiment being carried out with reference to appended accompanying drawing, more than reach other feature and advantage and will become more obvious to those skilled in the art, in the accompanying drawing:
Fig. 1 illustrates the coupling path of electromagnetic pulse to communication system.
Fig. 2 illustrates the antenna feeder electromagnetic pulse protector connection diagram in use according to the embodiment of the invention.
The specific embodiment
The utility model provides a kind of antenna feeder electromagnetic pulse protector, the present domestic similar products that also do not have, the successful research and development of product can be filled up the home products blank, effectively improve the ability that weaponry is tackled complicated galvanomagnetic-effect environment, and realize good economic benefit.
The strong electromagnetic pulse characteristic
At present, the description of high-altitude nuclear electromagnetic pulse (HEMP) radiation environment is had multiple, is mostly with the form of two indexes mathematic(al) representation as radiation waveform, its time domain expression formula as shown in Equation (1):
E (t)=E
0K (e
-α t-e
-β t) formula (1)
K is a correction factor, E
0Be the peak value field intensity, β, α are the parameters that characterizes the pulse before and after edge.
In one embodiment, formula (1) but in each value be E
0=50kV/m, α=4 * 10
7/ s, β=6 * 10
8/ s, k=1.3.
Strong electromagnetic pulse has following characteristics:
(1) amplitude is big.The electric-field intensity of electromagnetic pulse is at a few kilometer range Nei Keda 1～100,000 volts/rice.
(2) action time is short.The electric field change of nuclear electromagnetic pulse (NEMP) is rapid, can rise to maximum in the time of 0.01-0.03 microsecond, also has only the time of tens microseconds from occurring to end, fast 50 times than lightning.
(3) frequency spectrum is wide.The wide frequency range of electromagnetic pulse (frequency from several hertz to 100 megahertzes), to military or civilian ultralow frequency (VLF), high frequency (HF), hyperfrequency (VHF) radio communication influence greatly.
(4) sphere of action is wide.During nuclear explosion in high altitude,, be covered with the vast area of the earth because its source region is in tens kilometers the sky overhead, the NEMP of emission downwards from large-area source region like this, its field intensity changes in vast zone not quite.When nuclear explosion occurs in ground or close ground, the about 3～8km of the covering radius in source region, but the electromagnetic pulse signal that radiates can pass to far place; When nuclear explosion occurs in 3～25 kilometers height, the about 2-8 kilometer of source region radius; When nuclear explosion takes place in the high-altitude of rarefaction of air more than 30 kilometers, because the gamma-rays decay is slower, thereby the distance that sees through is longer, sphere of action is wider, so that the destruction of nuclear electromagnetic pulse can reach thousands of kilometers, allly on the earth can see that the place of quick-fried point all can be subjected to the covering of electromagnetic pulse.
The coupling mechanism of electromagnetic pulse
Electromagnetic pulse (EMP) is coupled into internal system by the Qianmen coupling or the back door of electronic equipment, can produce serious destruction to the communications electronics system.The Qianmen coupling is meant the inside that electromagnetic pulse is coupled to system by the antenna system of not having.Antenna system is used for power is coupled into and out of equipment, therefore an access arrangement is provided and has produced the active path that destroys to pulse power supply.Back door coupling is meant that electromagnetic pulse passes through to produce big transient current or electric standing wave on the cable of the holding electrical line of equipment and devices interconnect, and the damage of circuit can be caused in these energy access arrangement inside.Fig. 1 is the coupling path of electromagnetic pulse to communication system.As shown in Figure 1, the back door of communication system coupling mainly is by antenna, power line, holding wire, the slot coupling of the cabinet hole inside to system.
The antenna coupling
The dual-mode antenna that electromagnetic pulse is coupled to communication system will induce voltage or electric current, also will consider the frequency range response and the gain of this antenna certainly, just can respond to very big voltage when frequency is very high on very short antenna.These voltages or electric current will influence the operate as normal of system by cable transmission to internal system, will damage electronic circuit and components and parts thereof when serious.
Power line, holding wire coupling
Electromagnetic pulse is by power line, input and the output end signal line of communication system, and coupling electromagnetic pulse energy and produce the voltage or the current signal of certain intensity enters communication system in the mode of conduction coupling again then.
The slot coupling of cabinet hole
Because the cable of ventilation and heat and turnover cabinet need perforate on shielding case.When the size of hole seam greater than two of electromagnetic wavelength/for the moment, electromagnetic wave can enter cabinet inside, the shield effectiveness of cabinet will greatly reduce.When having the lead of perforation to pass in the aperture, if electromagnetic pulse incident electric field and the partial parallel of perforation lead outside cabinet, then connect lead can be directly from the in-field coupling electromagnetic energy and be introduced into circuit in the cabinet, the couple current on the circuit significantly strengthens in the cabinet thereby make.In addition, the scattered field that shielding case shell induced-current forms by with connect the lead coupling, also can in cabinet, produce stronger couple current on the circuit, and the couple current peak value can increase with connecting the increase that lead exposes to the cabinet partial-length.
The mechanism and the method that suppress electromagnetic pulse
Surge suppression device commonly used is gas-discharge tube, Transient Voltage Suppressor, piezo-resistance, semiconductor diode etc.Their operation principle difference, but similar C-V characteristic is arranged, very little when promptly both end voltage is lower than assigned voltage by electric current, and after both end voltage is higher than assigned voltage, can be index law by electric current and increases.This C-V characteristic makes it can satisfy the requirement that surge suppresses cascading water and amplitude limit simultaneously, thereby also just becomes the leading device that surge suppresses.
The common feature of various electromagnetic pulse suppression devices is that device all presents high impedance below threshold voltage, in case surpass threshold voltage, then impedance just sharply descends, and all peak voltage is had certain inhibitory action, but separately shortcoming is arranged all.Therefore according to concrete application scenario, generally adopt one or several the combination in the above-mentioned device to set up corresponding protection circuit.
Gas-discharge tube can be used for aspects such as data wire, cable television, AC power, telephone system and carry out surge protection, and general device voltage scope is from 75～10000V, and shock-resistant peak point current 20000A can bear the discharge up to several kJ (kilojoule)s.The advantage of gas-discharge tube is that the through-current capacity capacity is big, the insulaion resistance height, and leakage current is little.Therefore, gas-discharge tube is applicable to and sets up antenna feeder electromagnetic pulse protection circuit.
The major parameter of gas-discharge tube:
1) reaction time refers to surpass breakdown voltage to the time that produces punch-through from applied voltage, and the gas-discharge tube reaction time is generally in μ s numbers of poles.
2) power capacity refers to the ceiling capacity that gas-discharge tube can bear and distributes, and it is defined as under 8 * 20 fixing μ s current waveforms, the electric current that can bear and distribute.
3) capacitance refers to the gas-discharge tube two interpolar capacitances that record under specific 1MHz frequency.The gas-discharge tube capacitance is very little, is generally≤1pF.
4) dc breakdown voltage, when the speed rising of applied voltage with 500V/s, the voltage when discharge tube produces spark is breakdown voltage.Gas-discharge tube has the dc breakdown voltage of multiple different size, and its value depends on factors such as the kind of gas and interelectrode distance.
5) temperature range, its operating temperature range are generally between-55 ℃～+ 125 ℃.
The utility model provides a kind of serial ports electromagnetic pulse protector on the basis of above-mentioned gas discharge tube, be used to prevent because the antenna coupling causes the damage of electronic circuit.
In one embodiment, this antenna feeder electromagnetic pulse protector comprises interface, gas-discharge tube and housing.Wherein gas-discharge tube is connected with housing with interface.Frame ground.
In use, interface is electrically connected with antenna, thereby in parallel with radio-frequency apparatus.Referring to Fig. 2.
The operation principle of this antenna feeder electromagnetic pulse protector is, and is because gas-discharge tube is a kind of insulator under normal conditions, in parallel with protected equipment.When the generation overvoltage made gas-discharge tube reach pulse discharging voltage, circuit can be short-circuited at short notice, thereby electromagnetic pulse is guided to ground networks, and behind the electromagnetic pulse loss of voltage, gas-discharge tube returns to state of insulation.In the present embodiment, when overvoltage takes place, when making gas-discharge tube reach pulse discharging voltage, the gas discharge route of pipe line can be short-circuited at short notice, electromagnetic pulse is guided to the housing of ground connection.And behind the electromagnetic pulse loss of voltage, the circuit working from the antenna to the radio-frequency apparatus, thus entire equipment is resumed work.
In one embodiment, the model of gas-discharge tube can be EPCOS R238XH, and running parameter can be 230V, and 20KA can be the two poles of the earth mounted type.
In one embodiment, the concrete technical indicator of antenna feeder electromagnetic pulse protector can be shown in the following table 1.
Table 1
Though protected in the present embodiment equipment is radio-frequency apparatus, this antenna feeder electromagnetic pulse protector can be used for protecting other electronic device and equipment to avoid the infringement of antenna coupling.And, though used concrete gas-discharge tube among the embodiment described herein, and provided the concrete technical indicator of antenna feeder electromagnetic pulse protector, this use is novel to be not limited to this.Therefore, those of ordinary skills will appreciate that, under the situation of the spirit and scope of the present invention that do not exceed the claims record, can make on the various forms and details on change.
Claims (4)
1. an antenna feeder electromagnetic pulse protector is characterized in that, comprising:
Interface;
Discharge tube; With
Housing;
Wherein said discharge tube is electrically connected with described interface and described housing;
Wherein in use, described interface is electrically connected with the antenna of outside, and in parallel with the protected equipment that is connected to described antenna of outside.
2. antenna feeder electromagnetic pulse protector as claimed in claim 1 is characterized in that described protected equipment is radio-frequency apparatus.
3. antenna feeder electromagnetic pulse protector as claimed in claim 1 is characterized in that described discharge tube is a gas-discharge tube.
4. antenna feeder electromagnetic pulse protector as claimed in claim 3 is characterized in that, described gas-discharge tube is the two poles of the earth mounted type gas-discharge tubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206896284U CN201983706U (en) | 2010-12-30 | 2010-12-30 | Antenna feed electromagnetic pulse protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206896284U CN201983706U (en) | 2010-12-30 | 2010-12-30 | Antenna feed electromagnetic pulse protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201983706U true CN201983706U (en) | 2011-09-21 |
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ID=44611165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206896284U Expired - Fee Related CN201983706U (en) | 2010-12-30 | 2010-12-30 | Antenna feed electromagnetic pulse protector |
Country Status (1)
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|---|---|
| CN (1) | CN201983706U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106802112A (en) * | 2017-01-07 | 2017-06-06 | 深圳市景程信息科技有限公司 | The Spark gap device of cylindrical structural |
| CN107658859A (en) * | 2017-10-17 | 2018-02-02 | 西安飞机工业（集团）有限责任公司 | A kind of Spark gap method for aircraft communication navigation system |
-
2010
- 2010-12-30 CN CN2010206896284U patent/CN201983706U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106802112A (en) * | 2017-01-07 | 2017-06-06 | 深圳市景程信息科技有限公司 | The Spark gap device of cylindrical structural |
| CN107658859A (en) * | 2017-10-17 | 2018-02-02 | 西安飞机工业（集团）有限责任公司 | A kind of Spark gap method for aircraft communication navigation system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110921 Termination date: 20111230 |