CN102403702A - Ultra-wideband electromagnetic pulse protection module of HF/VHF frequency band - Google Patents
Ultra-wideband electromagnetic pulse protection module of HF/VHF frequency band Download PDFInfo
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- CN102403702A CN102403702A CN201110373461XA CN201110373461A CN102403702A CN 102403702 A CN102403702 A CN 102403702A CN 201110373461X A CN201110373461X A CN 201110373461XA CN 201110373461 A CN201110373461 A CN 201110373461A CN 102403702 A CN102403702 A CN 102403702A
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- 229910052802 copper Inorganic materials 0.000 claims abstract description 40
- 239000010949 copper Substances 0.000 claims abstract description 40
- 239000004020 conductor Substances 0.000 claims description 24
- 239000002184 metal Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 230000000630 rising effect Effects 0.000 description 12
- 239000003990 capacitor Substances 0.000 description 6
- 230000001629 suppression Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 230000001681 protective effect Effects 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
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Abstract
The invention provides an ultra-wideband electromagnetic pulse protection module of HF/VHF frequency band, which is characterized in that: the device comprises a coaxial cavity low-pass filter, a gas discharge tube, a high-power TVS tube and a low-power TVS tube, wherein two ends of the coaxial cavity low-pass filter are respectively connected with a coaxial port through copper wires; the gas discharge tube is connected in series with the high-power TVS tube and then is connected between a copper wire and a ground wire at one end of the coaxial cavity low-pass filter; the low-power TVS tube is connected between the copper wire at the other end of the coaxial cavity low-pass filter and the ground wire. The coaxial connection mode is used, the device can be conveniently arranged on a coaxial signal line between an outdoor cable (including an antenna) and indoor electronic equipment, ultra wide band strong electromagnetic pulses coupled to the signal cable are released, and the effect of protecting HF/VHF frequency band sensitive equipment from pulse energy damage is achieved.
Description
Technical field
The invention belongs to strong electromagnetic pulse guard technology field; Relate in particular to a kind of super-broadband electromagnetic impulse protection module, can be used for of the protection of HF/VHF frequency range electronic equipment super-broadband electromagnetic impulse with steep rising edge time (less than 1ns) with HF/VHF frequency range sensitive equipment of broad applicability.
Background technology
Super-broadband electromagnetic impulse is meant the strong electromagnetic pulse of rising edge time less than 1ns, because it has the rising edge time that is exceedingly fast, its spectrum energy possibly be distributed in 10MHz in the scope of several GHz, even surpasses 10GHz.Covered the working frequency range of present most of sensitive equipment, super-broadband electromagnetic impulse can produce than close coupling with the sensitive equipment antenna and get into radio-frequency front-end and equipment is produced damage.In addition because there is high fdrequency component in super-broadband electromagnetic impulse; Its woven shield to slit aperture on door and window slit (comprising woven wire), the sensitive equipment cabinet and braided shield cable all has stronger penetration capacity; It is stronger than nuclear electromagnetic pulse to be coupled into the inner strong electromagnetic pulse energy of sensitive equipment through the back door, to the interference of sensitive equipment, injure stronger.
Present existing strong electromagnetic pulse means of defence is less; Existing in the world strong electromagnetic pulse protection circuit also is to be protection object with the nuclear electromagnetic pulse with longer rising edge time (the rising edge time of AT&T Labs's waveform is 2.5ns, and the American army mark waveform rising edge time is 5ns).For super-broadband electromagnetic impulse; Because its rising edge time is exceedingly fast and (can reaches 0.1ns; Pulse duration is merely 1ns); And the response time of at present the fastest suppression device TVS pipe is merely 1ns, and it is 0.1ns to the rising edge time, and pulse duration is that the super-broadband electromagnetic impulse of 1ns does not have any protective action (most of electromagnetic pulse energy got into late-class circuit through suppression device before suppression device begins response) basically.
Summary of the invention
The technical problem that the present invention will solve is: the super-broadband electromagnetic impulse protection module that a kind of HF/VHF frequency range is provided; Can be installed on easily on the coaxial signal line between outside cable and the indoor electric subset; Release and be coupled to the ultra broadband strong electromagnetic pulse on the signal cable, play protection HF/VHF frequency range sensitive equipment and exempt from the effect that pulse energy is damaged.
The present invention solves the problems of the technologies described above the technical scheme of being taked to be: the super-broadband electromagnetic impulse protection module of HF/VHF frequency range; It is characterized in that: it comprises coaxial cavity low pass filter, gas discharge tube, high-power TVS pipe and small-power TVS pipe, and the two ends of coaxial cavity low pass filter are connected with coaxial through copper conductor respectively; Gas discharge tube be connected between the copper conductor and ground wire of coaxial cavity low pass filter one end after high-power TVS pipe is connected; Small-power TVS pipe is connected between the copper conductor and ground wire of the coaxial cavity low pass filter other end.
Press such scheme, described coaxial cavity low pass filter comprises metal shell, the multistage copper conductor is set in the metal shell and is series at the copper post between copper conductor, and the copper post is with the medium tube with the metal shell insulation outward.
Press such scheme, described copper column length is 5～20mm, and diameter is 10mm～20mm.
Press such scheme, the exponent number of described coaxial cavity low pass filter is 3～5 rank, and a copper post and one section copper conductor constitute 1 rank.
Press such scheme, described coaxial characteristic impedance is 50 ohm.
Beneficial effect of the present invention is:
1, adopts filter circuit can obviously prolong the rising edge time of super-broadband electromagnetic impulse, be provided enough response times for back level small-power TVS manages; Because high several magnitudes of cavity body filter Q value adopt this scheme will realize lower squareness factor, under the prerequisite that does not influence inband signaling, try one's best raising to outside the reflection of strong electromagnetic pulse energy.And its puncture voltage is very high, and the influence that receives environment (temperature, humidity) is less.
2, adopt gas discharge tube to connect as first order protection with high-power TVS pipe, the pulse duration that reduces strong electromagnetic pulse can obviously increase the instantaneous power ability to bear of back level small-power TVS pipe; Gas discharge tube and high-power TVS pipe is connected in addition, in the afterflow that effectively suppresses gas discharge tube, reduces the additional capacitor of the whole first protection branch road, reduces the influence of protection module to normal transmission channel.
Description of drawings
Fig. 1 is the structural representation of one embodiment of the invention.
Fig. 2 is the equivalent circuit diagram of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing the combined type strong electromagnetic pulse integrated protection module that is used for the ultra short wave communication frequency band of the present invention is done further detailed explanation.
Fig. 1 is the structural representation of one embodiment of the invention, comprises coaxial cavity low pass filter, gas discharge tube, high-power TVS pipe and small-power TVS pipe.
The coaxial cavity low pass filter comprises metal shell, multistage copper conductor 3 is set in the metal shell and is series at the copper post 4 between copper conductor, and wherein the additional inductor of copper conductor constitutes the inductance of whole coaxial cavity low pass filter; The copper post 4 outer medium tubes 5 that insulate with metal shell that are with prevent that the copper post is connected with the metal shell of filter, and the face between copper post side and the filter housing-face coupling has constituted the shunt capacitance of coaxial cavity low pass filter.Copper post and copper conductor are spaced high impedance and the Low ESR part that constitutes filter, and 3～5 rank are generally elected on 1 rank of a copper post and one section copper conductor formation filter as, and present embodiment is 4 rank.The copper column length is generally 5～20mm, and diameter is 10mm～20mm.The coaxial characteristic impedance is 50 ohm.
Coaxial cavity low pass filter one end is connected with coaxle input end 1 through copper conductor, and is connected gas discharge tube 6 and high-power TVS here between copper conductor and the ground wire and manages 7 circuit of connecting; The coaxial cavity low pass filter other end is connected with coaxial output line 2 through copper conductor, and is connected small-power TVS between copper conductor and the ground wire here and manages 8.
Fig. 2 is the equivalent circuit diagram of Fig. 1, and the two ends of coaxial cavity low pass filter 10 are connected with coaxial through copper conductor respectively; Gas discharge tube 6 be connected between the copper conductor and ground wire of coaxial cavity low pass filter 10 1 ends after high-power TVS pipe 7 is connected; Small-power TVS pipe 8 is connected between the copper conductor and ground wire of the coaxial cavity low pass filter other end.
Protection module of the present invention is made up of three grades of protection circuits, is respectively parallelly connected gas discharge tube+high-power TVS pipe branch road, series connection ultrashort wave frequency range cavity low pass filter, and the parallelly connected small-power TVS branch road of rear end.
For super-broadband electromagnetic impulse; The difficult point of its protection is that the response time of existing suppression device grows (the shortest 1ns); When suppression device begins to produce response; Super-broadband electromagnetic impulse has passed protection module, and the present invention utilizes coaxial configuration low pass filter filters out super-broadband electromagnetic impulse high fdrequency component and then slows down the rising edge time of pulse.Simulation result shows; The low pass filter of 400MHz can be slowed to 3ns～4ns with the rising edge of the super-broadband electromagnetic impulse of 0.1ns～1ns rising edge time; The little additional capacitor TVS pipe that this moment, the parallel connection response time was exceedingly fast behind filter can be released to the energy of super-broadband electromagnetic impulse, reaches the purpose that the rear end sensitive equipment is protected.
Because it is little that small-power TVS pipe can bear power; And the width of its transient pulse power bearing ability and pulse is inversely proportional to; For improving the pulse power ability to bear of TVS pipe; Need before above-mentioned combination of devices, install preceding class large power suppression device additional, be used to shorten the pulse duration of strong electromagnetic pulse, i.e. the gas discharge tube that the present invention adopts, high-power TVS pipe be the mode of series connection each other.
Though gas discharge tube has very big through-current capability and response time faster, there is afterflow in it after returning to off-state from conducting state, and this afterflow is bigger to normal signal; And adopt high-power TVS pipe as first order protection, although its response time is fast, and there is not the problem of afterflow; But its additional capacitor is big (power is big more, and additional capacitor is big more, can reach the nF magnitude) very; To obviously influence the high-frequency circuit impedance matching, normal signal will be produced considerable influence; Based on above analysis, gas discharge tube is connected and ground connection with high-power TVS pipe, constitute first circuit of protection module, this branch circuit integral capacitor is less than the additional capacitor (pF magnitude) of gas discharge tube; Switch to when breaking off from conducting when this branch circuit in addition, the TVS pipe that breaks off has rapidly been blocked the afterflow path of gas discharge tube, to remedy shortcoming each other each other, can show good inhibition effect.
In addition, generally speaking, super-broadband electromagnetic impulse all has certain repetition characteristic, and its repetition is tens of more than inferior even hundreds of time at per second.The super-broadband electromagnetic impulse of high repetition can significantly reduce the damage threshold of sensory system electronic circuit, and the damage threshold that it will reduce the protection module filter circuit equally makes its filter transmission characteristic degradation.Based on this; LPF of the present invention adopts " cucurbit string " coaxial filter; The said structure filter is not owing to use lumped parameter electric capacity, inductance (these devices performance under the strong electromagnetic pulse of high repetition impacts all significant change will take place); Whole protection module its performance under the super-broadband electromagnetic impulse of high repetition impacts is more stable, makes it can keep good transmission characteristic for a long time.
Claims (5)
1.HF/VHF the super-broadband electromagnetic impulse protection module of frequency range; It is characterized in that: it comprises coaxial cavity low pass filter, gas discharge tube, high-power TVS pipe and small-power TVS pipe, and the two ends of coaxial cavity low pass filter are connected with coaxial through copper conductor respectively; Gas discharge tube be connected between the copper conductor and ground wire of coaxial cavity low pass filter one end after high-power TVS pipe is connected; Small-power TVS pipe is connected between the copper conductor and ground wire of the coaxial cavity low pass filter other end.
2. super-broadband electromagnetic impulse protection module according to claim 1; It is characterized in that: described coaxial cavity low pass filter comprises metal shell; The multistage copper conductor is set in the metal shell and is series at the copper post between copper conductor, the copper post is with the medium tube with the metal shell insulation outward.
3. super-broadband electromagnetic impulse protection module according to claim 2 is characterized in that: described copper column length is 5 ~ 20mm, and diameter is 10mm ~ 20mm.
4. super-broadband electromagnetic impulse protection module according to claim 2 is characterized in that: the exponent number of described coaxial cavity low pass filter is 3 ~ 5 rank, and a copper post and one section copper conductor constitute 1 rank.
5. according to any described super-broadband electromagnetic impulse protection module in the claim 1 to 4, it is characterized in that: described coaxial characteristic impedance is 50 ohm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110373461 CN102403702B (en) | 2011-11-22 | 2011-11-22 | HF/VHF frequency-range ultra wide band electromagnetic pulse protection module |
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| CN 201110373461 CN102403702B (en) | 2011-11-22 | 2011-11-22 | HF/VHF frequency-range ultra wide band electromagnetic pulse protection module |
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| CN102403702A true CN102403702A (en) | 2012-04-04 |
| CN102403702B CN102403702B (en) | 2013-11-06 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103855459A (en) * | 2012-11-29 | 2014-06-11 | 细美事有限公司 | Plasma antenna and apparatus for generating plasma having the same |
| CN104577276A (en) * | 2015-02-10 | 2015-04-29 | 深圳三星通信技术研究有限公司 | Integrated low-pass hard link structure and cavity filter |
| CN110401181A (en) * | 2019-07-02 | 2019-11-01 | 浙江大华技术股份有限公司 | A kind of surging protection circuit |
| CN110556805A (en) * | 2019-09-26 | 2019-12-10 | 深圳市速联技术有限公司 | Ultra-wideband radio frequency coaxial lightning electromagnetic pulse protection method and device |
| CN111525527A (en) * | 2020-06-03 | 2020-08-11 | 深圳市速联技术有限公司 | Radio frequency signal thunder and lightning electromagnetic pulse protection device |
| CN111525528A (en) * | 2020-06-03 | 2020-08-11 | 深圳市速联技术有限公司 | Radio frequency signal thunder and lightning electromagnetic pulse multistage bidirectional protection device |
| CN111786735B (en) * | 2020-06-28 | 2021-04-13 | 深圳市速联技术有限公司 | Ultra-wideband radio frequency coaxial strong electromagnetic pulse protection method and device |
| CN112994715A (en) * | 2021-02-03 | 2021-06-18 | 深圳市速联技术有限公司 | Ultra-wideband radio frequency link strong electromagnetic pulse protection method and device |
| US11764569B2 (en) | 2019-07-02 | 2023-09-19 | Zhejiang Dahua Technology Co., Ltd. | Electrical surge protection circuits |
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2011
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103855459A (en) * | 2012-11-29 | 2014-06-11 | 细美事有限公司 | Plasma antenna and apparatus for generating plasma having the same |
| CN104577276A (en) * | 2015-02-10 | 2015-04-29 | 深圳三星通信技术研究有限公司 | Integrated low-pass hard link structure and cavity filter |
| CN104577276B (en) * | 2015-02-10 | 2017-05-10 | 深圳三星通信技术研究有限公司 | Integrated low-pass hard link structure and cavity filter |
| CN110401181A (en) * | 2019-07-02 | 2019-11-01 | 浙江大华技术股份有限公司 | A kind of surging protection circuit |
| CN110401181B (en) * | 2019-07-02 | 2022-03-01 | 浙江大华技术股份有限公司 | Surge protection circuit |
| US11764569B2 (en) | 2019-07-02 | 2023-09-19 | Zhejiang Dahua Technology Co., Ltd. | Electrical surge protection circuits |
| CN110556805A (en) * | 2019-09-26 | 2019-12-10 | 深圳市速联技术有限公司 | Ultra-wideband radio frequency coaxial lightning electromagnetic pulse protection method and device |
| CN111525527A (en) * | 2020-06-03 | 2020-08-11 | 深圳市速联技术有限公司 | Radio frequency signal thunder and lightning electromagnetic pulse protection device |
| CN111525528A (en) * | 2020-06-03 | 2020-08-11 | 深圳市速联技术有限公司 | Radio frequency signal thunder and lightning electromagnetic pulse multistage bidirectional protection device |
| CN111786735B (en) * | 2020-06-28 | 2021-04-13 | 深圳市速联技术有限公司 | Ultra-wideband radio frequency coaxial strong electromagnetic pulse protection method and device |
| CN112994715A (en) * | 2021-02-03 | 2021-06-18 | 深圳市速联技术有限公司 | Ultra-wideband radio frequency link strong electromagnetic pulse protection method and device |
| CN112994715B (en) * | 2021-02-03 | 2022-02-18 | 深圳市速联技术有限公司 | Ultra-wideband radio frequency link strong electromagnetic pulse protection method and device |
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