CN100479290C - Siganl thunder-proof device - Google Patents
Siganl thunder-proof device Download PDFInfo
- Publication number
- CN100479290C CN100479290C CNB2005101091600A CN200510109160A CN100479290C CN 100479290 C CN100479290 C CN 100479290C CN B2005101091600 A CNB2005101091600 A CN B2005101091600A CN 200510109160 A CN200510109160 A CN 200510109160A CN 100479290 C CN100479290 C CN 100479290C
- Authority
- CN
- China
- Prior art keywords
- circuit
- frequency
- signal processing
- low
- pass filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
This invention discloses a signal lightning device including: a first stage protection circuit and a second stage protection circuit, in which, the first stage protection circuit is connected between signal lines and the earth, the second protection circuit is one or more than one, each of them is parallel to a signal process circuit needed to be protected, one end of the second protection circuit and the signal process circuit is connected to the earth, the other end is connected to the signal line by a filter circuit, in which, said filter circuit allows the passed frequency region larger than or equal to the process band of the signal process circuit connected to it.
Description
Technical field
The present invention relates to the surge protection technology of communication equipment signaling interface, be meant a kind of broadband signal lightning protection device especially.
Background technology
Lightning protection device is called surge protector (SPD, Surge Protective Devices) again, is can be installed in device port to be used for device that various lightning currents, switching overvoltage etc. are protected.It contains a non-linear element at least.
The lightning Protection Design of signaling interface is the key that guarantees that communication equipment can move reliably and with long-term.Along with the development of communication equipment, the variation of signaling interface type has all proposed more and more higher requirement to the lightning Protection Design technology and the ratio of performance to price.
Referring to shown in Figure 1, the schematic diagram of traditional λ/4 lightning protection devices.Utilize λ in the transmission line theory/4 short-circuit line principles, between the holding wire of antenna and ground wire, be connected an inductance L, thereby be equivalent on feeder line, insert the branch line of a section termination short circuit, this section branch line is equivalent to one section λ/4 short-circuit lines on the rf frequency of feeder line transmission, therefore this section branch line is equivalent to open circuit to rf frequency on the access point of feeder line, does not influence the normal transmission of radiofrequency signal.And in direct current and low-frequency range, the effect of this section line is with the holding wire short circuit, and the overvoltage/overcurrent during thunderbolt between holding wire will effectively be suppressed.Inductance can utilize microstrip line to realize, also can select for use the inductance of lumped parameter to realize.The shortcoming of this scheme is the high-frequency narrow-band signal that only is applicable to specific wavelength, is not suitable for broadband signal; Direct current signal (feed) can't pass through.
The secondary protectiving scheme structure that generally adopts is referring to shown in Figure 2 at present.Comprise the two-stage protection circuit, first order protection circuit generally is made up of gas discharge tube and piezo-resistance, the thunderbolt energy that can release higher; Second level protection circuit adopts transient voltage suppressor (TVS) that residual voltage is reduced.With inductor L decoupling, start prior to second level protection circuit between first order protection circuit and the second level protection circuit to guarantee first order protection circuit.Yet the shortcoming of this scheme is: owing to must adopt the inductor decoupling, make high-frequency signal to pass through; And owing to after the inductance decoupling bigger thunder and lightning energy is arranged still, if at this moment signal frequency range is wide, the TVS pipe that two stages of circuit is adopted requires height, and the device of two stages of circuit is difficult to choose and the cost height.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of lightning protection device that can be applicable to the broadband signal protection, with the protection question of the band of scheme solution cheaply feed broadband signal.
Based on above-mentioned purpose a kind of siganl thunder-proof device provided by the invention, comprise one-level protection circuit and two stages of circuit, the one-level protection circuit is connected between holding wire and the ground, wherein, described two stages of circuit is greater than one, described siganl thunder-proof device further comprises the filter circuit greater than, the signal frequency range difference of each filter circuit correspondence; The signal processing circuit that each two stages of circuit and at least one need protection is connected in parallel; one end ground connection of two stages of circuit and signal processing circuit; the other end is connected to holding wire by filter circuit, and this filter circuit allows the frequency separation that the passes through processing frequency range more than or equal to connected signal processing circuit.
Described greater than comprising in one the filter circuit: cut-off frequency is in series smaller or equal to the high-pass filtering circuit of the low-limit frequency of connected described signal processing circuit processing frequency range and the low-pass filter circuit that cut-off frequency is handled the highest frequency of frequency range more than or equal to this signal processing circuit.Described greater than also comprising in one the filter circuit: cut-off frequency is handled the high-pass filtering circuit of the low-limit frequency of frequency range smaller or equal to connected described signal processing circuit.Described greater than comprising in one the filter circuit: cut-off frequency is handled the low-pass filter circuit of the highest frequency of frequency range more than or equal to connected described signal processing circuit.
Can also comprise in described: handle the high-pass filtering circuit of low-limit frequency of frequency range and cut-off frequency by cut-off frequency smaller or equal to connected described signal processing circuit and handle the filter circuit that the low-pass filter circuit of the highest frequency of frequency range is in series more than or equal to this signal processing circuit greater than one filter circuit, the input of the described low-pass filter circuit in this filter circuit is connected to the high-pass filtering circuit output that belongs to same filter circuit, and described signal processing circuit is connected the output of low-pass filter circuit; Cut-off frequency is smaller or equal to the high-pass filtering circuit of the low-limit frequency of connected described signal processing circuit processing frequency range, and described signal processing circuit is connected the output of this high-pass filtering circuit; Cut-off frequency is more than or equal to the low-pass filter circuit of the highest frequency of connected described signal processing circuit processing frequency range, and described signal processing circuit is connected the output of low-pass filter circuit.In this case, the described high-pass filtering circuit in each filter circuit is connected in series by cut-off frequency order from low to high from the signal input.
The cut-off frequency of high-pass filtering circuit described in this siganl thunder-proof device is further more than or equal to the highest frequency of the upper level frequency band signals lower than its respective signal processing circuit processes frequency range; The cut-off frequency of described low-pass filter circuit is further smaller or equal to the low-limit frequency of handling the high next stage frequency band signals of frequency range than described signal processing circuit.
The processing frequency range of signal processing circuit described in this siganl thunder-proof device is the peak low band of received signal frequency band, and the filter circuit that is connected with this signal processing circuit is cut-off frequency is handled the highest frequency of frequency range more than or equal to this signal processing circuit a low-pass filter circuit.
The processing frequency range of signal processing circuit described in this siganl thunder-proof device is the high band of received signal frequency band, and the filter circuit that is connected with this signal processing circuit is the high-pass filtering circuit of cut-off frequency smaller or equal to the low-limit frequency of described processing frequency range.
At least be provided with a high pass filter or band pass filter in the described high-pass filtering circuit.At least be provided with a low pass filter or band pass filter in the described low-pass filter circuit.
Filter circuit described in this siganl thunder-proof device is a band pass filter, and described band pass filter allows the frequency range the passed through processing frequency range more than or equal to connected signal processing circuit.
One-level protection circuit described in this siganl thunder-proof device is gas discharge tube or piezo-resistance or transient voltage suppressor or common solid discharging tube or discharge air-gap.
Two stages of circuit described in this siganl thunder-proof device is gas discharge tube or piezo-resistance or transient voltage suppressor or common solid discharging tube or discharge air-gap or λ/4 short-circuit lines.
From above as can be seen; siganl thunder-proof device provided by the invention is protected by for each signal processing circuit the two stages of circuit filter circuit being set separately; and technological means such as filtering in advance; guaranteed that the signal that is input to signal processing circuit has the low residual voltage that each branch road chip of signal can bear, and had the ability and the DC feedback ability of bearing the big lightning current of outdoor signal line, voltge surge.Thereby solved the problem of the broadband signal treatment circuit being carried out reliably protecting with extremely low cost.
Description of drawings
Fig. 1 is the principle schematic of λ/4 lightning protection devices;
Fig. 2 is the existing lightning protection device structural representation that adopts the secondary protectiving scheme;
Fig. 3 is the spectral characteristic schematic diagram of common broadband signal;
Fig. 4 is common broadband signal treatment circuit schematic diagram;
Fig. 5 is the broadband signal lightning protection device structural representation of preferred embodiment of the present invention;
Fig. 6 adopts a kind of broadband signal lightning protection device structural representation of band pass filter for the present invention.
Embodiment
The spectral characteristic of common broadband signal S is referring to shown in Figure 3, is that signal S1, the S2...Sn by different frequency range is formed by stacking on frequency spectrum.
At broadband signal, at present the structure of the signal processing circuit that generally adopts is referring to shown in Figure 4, at signal S1, the S2...Sn of different frequency range different post processing electric circuits is set respectively and handles corresponding signal respectively.
The present invention is directed to the characteristics of broadband signal treatment circuit, the siganl thunder-proof device of proposition mainly comprises: one-level protection circuit and two stages of circuit.The one-level protection circuit is connected between holding wire and the ground; Two stages of circuit is one or more, and each two stages of circuit and a signal processing circuit that needs protection are connected in parallel, and coming provides independent secondary protection for each signal processing circuit; One end ground connection of two stages of circuit and signal processing circuit, the other end is connected to holding wire by filter circuit.Wherein, described filter circuit allows the frequency separation that the passes through processing frequency range more than or equal to connected signal processing circuit.This filter circuit can directly be realized by band pass filter, also can be made up of high-pass filtering circuit and low-pass filter circuit, and the high-pass filtering circuit cut-off frequency should be handled the low-limit frequency of frequency range smaller or equal to connected described signal processing circuit; The cut-off frequency of low-pass filter circuit should be handled the highest frequency of frequency range more than or equal to this signal processing circuit.So, the Signal Separation of pending frequency range can be come out, shielding may cause other dangerous frequency band signals.
Siganl thunder-proof device of the present invention is primarily aimed at the protection that broadband signal is handled, and also can be applicable to single-frequency or narrow-band signal simultaneously.
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
The structure of the broadband signal lightning protection device of first preferred embodiment of the present invention is shown referring to Fig. 5.Form by an one-level protection circuit, n-1 high pass filter 2～n, n-1 low pass filter 1～n-1 and n second level protection circuit 1～n.The signal processing circuit that each two stages of circuit needs protection with it is connected in parallel; remove the S1 treatment circuit and directly be connected to holding wire by low pass filter 1; the Sn treatment circuit is directly with beyond high pass filter n is connected; other high pass filter k and low pass filter k-1 form a filter circuit and are used for the signal of input Sk treatment circuit is carried out Filtering Processing, and wherein k is the arbitrary integer of 2～n-1.Each high pass filter is connected in series by cut-off frequency order from low to high from the signal input, the input of low pass filter is connected to the high-pass filtering circuit output that belongs to same filter circuit, and each signal processing circuit is connected to the output of corresponding low pass filter.Certainly only be that the filter circuit of S1 and Sn treatment circuit also can be made up of high pass and low pass filter for example here.
First order protection circuit adopts low parasitic capacitance high-energy lightning protection component, realization is released to the big thunder and lightning energy of broadband signal, owing to also have back level protection circuit, so it is less demanding to the residual voltage after the first order protection, can select protective device realization cheaply for use, such as: gas discharge tube, piezo-resistance etc.Then signal utilizes multistage high pass to become the signal of different frequency to carry out the secondary protection respectively signal decomposition with low pass filter by specially designed multi-stage filter circuit.These low passes can play two effects with high pass filter: be that signal is separated by frequency range on the one hand, on the other hand since the spectral characteristic of thunder and lightning signal mainly concentrate in the 10MHz, so the Filtering Processing by above-mentioned filter can also play the effect with thunder and lightning signal attenuation.Because filtered signal is done the secondary protective treatment more respectively, the frequency range of signal at this moment is very narrow, therefore can satisfy the requirement of low residual voltage with simple protection circuit, realizes the protection to back each treatment circuit of level.
Preferable filter of the present invention should satisfy following requirement:
1) first order low pass filter must be made up of a series inductance or a long line of equivalence with certain equivalent air core inductor amount at least, and DC feedback can be passed through smoothly in the time of with the assurance decoupling;
2) first order high pass filter has certain withstand voltage series capacitance by one at least and forms;
3) design principle of k level low pass filter is that the cut-off frequency of low pass filter should be designed to the highest frequency more than or equal to signal Sk, preferred also should be smaller or equal to the low-limit frequency of signal Sk+1,1≤k≤n-1 wherein;
4) design principle of m level high pass filter is that the cut-off frequency of high pass filter should be designed to the low-limit frequency smaller or equal to signal Sm, preferred also should be more than or equal to the highest frequency of signal Sm-1,2≤m≤n wherein.
The thunder and lightning energy that signal is released big by the one-level protection circuit is isolated the S1 signal by low pass filter 1, and the S1 signal is input to the S1 treatment circuit after two stages of circuit 1; The signal of frequency＞S1 is transferred to the back level by high pass filter 1, isolates the S2 signal by low pass filter 2 again, and the S2 signal is input to the S2 treatment circuit after two stages of circuit 2; The signal of frequency＞S2 continues to be transferred to the back level by high pass filter 2 ... so until n Signal Separation finished, and carries out arriving treatment circuit again after secondary protects respectively and carries out signal processing.Each frequency band signals after by each self-corresponding two stages of circuit remaining thunder and lightning energy reduced to very lowly, satisfy of the requirement of back each treatment circuit of level fully, thereby realized protection back each treatment circuit of level to voltage.
The present invention can also change on the basis of this embodiment, such as: all low pass filters can be designed to band pass filter according to actual needs; All high pass filters also can be designed to band pass filter according to actual needs.In addition, can also reduce one or more levels low pass filter according to actual needs; Reduce one or more levels high pass filter according to actual needs; And do not re-use one or more two stages of circuit according to actual needs.
In addition, filter circuit of the present invention can also directly be made up of band pass filter.Referring to shown in Figure 6, each signal processing circuit directly is connected with holding wire by a corresponding band pass filter.Here the band pass filter frequency separation that allows to pass through should preferably equal the processing frequency range of connected signal processing circuit more than or equal to the processing frequency range of connected signal processing circuit.In addition, those skilled in the art should be easy to expect that high pass by series connection and low pass filter replace described band pass filter and also be fine.
High pass among the present invention and low pass filter can be realized by the inductance capacitance that is dirt cheap; The first order and all second level protection circuits can realize that these protective devices can be gas discharge tube, piezo-resistance, general T VS, common solid discharging tube (TSS) etc., also can be discharge air-gap or λ/4 short-circuit lines with the protective device that is dirt cheap.
In a word, the above only is preferred embodiment of the present invention, in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is not equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1, a kind of siganl thunder-proof device, comprise one-level protection circuit and two stages of circuit, the one-level protection circuit is connected between holding wire and the ground, it is characterized in that, described two stages of circuit is greater than one, described siganl thunder-proof device further comprises the filter circuit greater than, the signal frequency range difference of each filter circuit correspondence;
The signal processing circuit that each two stages of circuit and at least one need protection is connected in parallel; one end ground connection of two stages of circuit and signal processing circuit; the other end is connected to holding wire by filter circuit, and this filter circuit allows the frequency separation that the passes through processing frequency range more than or equal to connected signal processing circuit.
2, siganl thunder-proof device according to claim 1, it is characterized in that described greater than comprising in one the filter circuit: cut-off frequency is in series smaller or equal to the high-pass filtering circuit of the low-limit frequency of connected described signal processing circuit processing frequency range and the low-pass filter circuit that cut-off frequency is handled the highest frequency of frequency range more than or equal to this signal processing circuit.
3, siganl thunder-proof device according to claim 1 is characterized in that, and is described greater than comprising in one the filter circuit: cut-off frequency is handled the high-pass filtering circuit of the low-limit frequency of frequency range smaller or equal to connected described signal processing circuit.
4, siganl thunder-proof device according to claim 1 is characterized in that, and is described greater than comprising in one the filter circuit: cut-off frequency is handled the low-pass filter circuit of the highest frequency of frequency range more than or equal to connected described signal processing circuit.
5, siganl thunder-proof device according to claim 1 is characterized in that, and is described greater than comprising in one the filter circuit:
Handle the high-pass filtering circuit of low-limit frequency of frequency range and cut-off frequency by cut-off frequency smaller or equal to connected described signal processing circuit and handle the filter circuit that the low-pass filter circuit of the highest frequency of frequency range is in series more than or equal to this signal processing circuit, the input of the described low-pass filter circuit in this filter circuit is connected to the high-pass filtering circuit output that belongs to same filter circuit, and described signal processing circuit is connected the output of low-pass filter circuit;
Cut-off frequency is smaller or equal to the high-pass filtering circuit of the low-limit frequency of connected described signal processing circuit processing frequency range, and described signal processing circuit is connected the output of this high-pass filtering circuit;
Cut-off frequency is more than or equal to the low-pass filter circuit of the highest frequency of connected described signal processing circuit processing frequency range, and described signal processing circuit is connected the output of low-pass filter circuit;
Described high-pass filtering circuit in each filter circuit is connected in series by cut-off frequency order from low to high from the signal input.
6, siganl thunder-proof device according to claim 5 is characterized in that, the cut-off frequency of described high-pass filtering circuit is further more than or equal to the highest frequency of the upper level frequency band signals lower than its respective signal processing circuit processes frequency range; The cut-off frequency of described low-pass filter circuit is further smaller or equal to the low-limit frequency of handling the high next stage frequency band signals of frequency range than described signal processing circuit.
7, siganl thunder-proof device according to claim 1, it is characterized in that, the processing frequency range of described signal processing circuit is the peak low band of received signal frequency band, and the filter circuit that is connected with this signal processing circuit is cut-off frequency is handled the highest frequency of frequency range more than or equal to this signal processing circuit a low-pass filter circuit.
8, siganl thunder-proof device according to claim 1, it is characterized in that, the processing frequency range of described signal processing circuit is the high band of received signal frequency band, and the filter circuit that is connected with this signal processing circuit is the high-pass filtering circuit of cut-off frequency smaller or equal to the low-limit frequency of described processing frequency range.
9, according to claim 2,3,5,6 or 8 described siganl thunder-proof devices, it is characterized in that, be provided with a high pass filter or band pass filter in the described high-pass filtering circuit at least.
10, according to claim 2,4,5,6 or 7 described siganl thunder-proof devices, it is characterized in that, be provided with a low pass filter or band pass filter in the described low-pass filter circuit at least.
11, siganl thunder-proof device according to claim 1 is characterized in that, described filter circuit is a band pass filter, and described band pass filter allows the frequency range the passed through processing frequency range more than or equal to connected signal processing circuit.
12, siganl thunder-proof device according to claim 1 is characterized in that, described one-level protection circuit is gas discharge tube or piezo-resistance or transient voltage suppressor or common solid discharging tube or discharge air-gap.
13, siganl thunder-proof device according to claim 1 is characterized in that, described two stages of circuit is gas discharge tube or piezo-resistance or transient voltage suppressor or common solid discharging tube or discharge air-gap or λ/4 short-circuit lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101091600A CN100479290C (en) | 2005-10-18 | 2005-10-18 | Siganl thunder-proof device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101091600A CN100479290C (en) | 2005-10-18 | 2005-10-18 | Siganl thunder-proof device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1851996A CN1851996A (en) | 2006-10-25 |
| CN100479290C true CN100479290C (en) | 2009-04-15 |
Family
ID=37133468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101091600A Expired - Fee Related CN100479290C (en) | 2005-10-18 | 2005-10-18 | Siganl thunder-proof device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100479290C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390889A (en) * | 2012-05-10 | 2013-11-13 | 深圳远征技术有限公司 | Lightning protection device |
| CN103905069B (en) * | 2012-12-28 | 2016-01-13 | 广西广播电视发展中心 | A kind of intermediate waves solid state transmitter with lightning protection device |
| CN106786468A (en) * | 2017-02-20 | 2017-05-31 | 广州中大南沙科技创新产业园有限公司 | A kind of RS485 telecommunication equipment lightning protections and observation circuit |
| CN107525974A (en) * | 2017-09-06 | 2017-12-29 | 武汉旗云高科工程技术有限公司 | A kind of Lightning Warning method and speed antenna integral type electric field change measuring instrument |
| CN110233473B (en) * | 2018-12-20 | 2021-11-30 | 熊秀 | Thunder and lightning and ultra-wideband high-power microwave comprehensive protection circuit |
| CN115549707B (en) * | 2022-09-01 | 2024-05-17 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Low-frequency lightning noise cooperative processing device and method |
-
2005
- 2005-10-18 CN CNB2005101091600A patent/CN100479290C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1851996A (en) | 2006-10-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2251191C2 (en) | Pulse surge protective gear | |
| CA1332074C (en) | Surge protection device | |
| CN100479290C (en) | Siganl thunder-proof device | |
| US7082022B2 (en) | Circuit for diverting surges and transient impulses | |
| KR101171228B1 (en) | Protection devices for power line against high altitude electromagnetic pulse | |
| CN201001035Y (en) | RF lightning protection device | |
| RU2658657C2 (en) | Surge protection device and method | |
| EP2501052A1 (en) | Power line communications systems | |
| CN203574361U (en) | Antenna feeder lightning protection device of RF radio frequency device for LED control | |
| CN206023721U (en) | A kind of electromagnetic compatibility filter circuit | |
| US20160322810A1 (en) | System and method for providing surge protection | |
| CN217642717U (en) | Induction lightning protection device applied to radio frequency interface | |
| CN202586325U (en) | Lightning-protection surge-proof power source protection device | |
| EP4318839A1 (en) | Charging device interface circuit and charging device | |
| EP2575228B1 (en) | Lightning protection circuit | |
| EP3886282B1 (en) | Sensing a high frequency arc noise in an arc fault detection circuit interruption (afci) device | |
| JPS59220017A (en) | Surge absorber for transformer | |
| CN105470936A (en) | Network transformer lightning protection circuit for suppressing common mode surge | |
| CN114124028A (en) | Combination filter circuit and combination filter device | |
| CN204732868U (en) | The microcomputer protecting controller of lightning protection | |
| CN200997528Y (en) | Lightening-proof radio frequency module | |
| CN203734304U (en) | Microminiature two-level protection channel surge protector | |
| CN202872625U (en) | Anti-surge power input filter | |
| CN2572642Y (en) | Microwave arrester | |
| CN201438602U (en) | Broadband radio frequency lighting arrester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090415 Termination date: 20141018 |
|
| EXPY | Termination of patent right or utility model |