CN210957784U - Lightning indirect effect protection module of communication signal - Google Patents
Lightning indirect effect protection module of communication signal Download PDFInfo
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- CN210957784U CN210957784U CN201921717814.1U CN201921717814U CN210957784U CN 210957784 U CN210957784 U CN 210957784U CN 201921717814 U CN201921717814 U CN 201921717814U CN 210957784 U CN210957784 U CN 210957784U
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Abstract
The utility model relates to an airborne equipment indirect effect protection technical field of thunder and lightning discloses an indirect effect protection module of communication signal's thunder and lightning, signal input part, lightning protection circuit, the signal output part that connects gradually, and the lightning protection circuit is connected with the earthing terminal. The protector device can release transient overcurrent, and through the subsequent protector device, the protector device can clamp overvoltage and reduce energy generated by lightning indirect effect. And then the device carries out high-frequency suppression and current limiting on residual energy through a protection device. Further reduce the residual energy, guarantee the safety of the latter stage circuit to the utmost extent. In addition, the shell is packaged by all metals, the shape of the shell is consistent with that of a conventional radio frequency connector, the shell is provided with mounting flange holes and fixing screw holes, and the bottom surface of the module is subjected to conductive oxidation treatment, so that the radio frequency port can be directly mounted, maintained and replaced conveniently.
Description
Technical Field
The utility model belongs to the technical field of the indirect effect protection of thunder and lightning, concretely relates to communication signal's indirect effect protection module of thunder and lightning.
Background
Lightning disasters are one of the most serious natural disasters, and casualties and property losses caused by the lightning disasters are countless every year all over the world. With the large application of electronic and microelectronic integrated devices, the damage of systems and devices caused by lightning overvoltage and lightning electromagnetic pulse is more and more. Therefore, it is very important to solve the problem of lightning disaster protection of the electronic information system as soon as possible. The installation of a Surge Protector (SPD) to suppress Surge and instantaneous overvoltage on a line and overcurrent on a bleeder line becomes one of the important links of the modern lightning indirect effect protection technology.
At present, the mainstream SPD is applied to the field of lightning indirect protection, and the defects of the lightning indirect protection by using the method are obvious. Therefore, the research on the high performance, the wide frequency band and the miniaturization of the lightning protection device of the airborne equipment is more and more focused by people.
The energy generated by the indirect effect of lightning is far larger than that generated by surge voltage, and when the protection level is high, the SPD fails to work, so that the protected circuit is damaged. The piezoresistors in the SPD have limitations in application occasions and cannot be applied to aircraft equipment. SPDs are mostly applied to power supply type and low-frequency signal circuits, parasitic capacitance and resistance in the circuits are large, and high-speed signal transmission can generate distortion.
Therefore, there is a need for a lightning indirect effect protection circuit for communication signals, which can ensure the safety of the protected circuit and at the same time does not affect the normal data transmission of the protected circuit.
Disclosure of Invention
The utility model aims at providing a communication signal's indirect effect protection module of thunder and lightning can guarantee by protection circuit's safety, does not influence the normal data transmission by protection circuit simultaneously, keeps unanimous with conventional radio frequency connector appearance simultaneously, does not increase the volume.
The utility model adopts the technical proposal that: a lightning indirect effect protection module of a communication signal comprises a shell, wherein a signal input end, a lightning protection circuit and a signal output end are sequentially connected with one another in the shell, and the lightning protection circuit is grounded;
the lightning protection circuit comprises a first protection device, a second protection device and a third protection device which are connected in sequence, wherein the first protection device and the second protection device are arranged between a signal path and a grounding end, and the third protection device is connected in series on the signal path.
Still include anti-surge resistance, anti-surge resistance sets up on first protective device and second protective device.
And the signal input end, the lightning protection circuit and the signal output end are electrically connected through cables.
The shell is mechanically fixed on the protected equipment through the flange holes and the screws and is reliably grounded.
The first protection device, the second protection device and the third protection device are surface-mounted devices welded on the PCB.
The first protection device is a PT640TA semiconductor discharge tube, the second protection device is a SMCJ7.5CA transient suppression diode, and the third protection device is a magnetic bead.
The utility model has the advantages that: the utility model relates to a lightning indirect effect protection module of communication signal, effectively clamp the overvoltage and the over-current that discharge that the lightning indirect effect produced, protect the back stage circuit safety; the integration level is high, and the PCB layout space is reduced; the low-voltage standing wave ratio and the low insertion loss are achieved, and normal transmission of useful radio frequency signals is guaranteed; the device is convenient to replace, and can be designed in a customized mode according to the installation size and the protection level.
Compare traditional protector, the utility model discloses guaranteed under communication signal's the indirect effect of thunder and lightning protection's the prerequisite, keep unanimous with conventional radio frequency connector appearance, realized protector's miniaturization, reduced protector's the volume that occupies in unmanned aerial vehicle, improve the cost-effectiveness ratio.
Drawings
Fig. 1 is a schematic structural diagram of a lightning indirect effect protection module for communication signals according to the present invention;
fig. 2 is a schematic diagram of an internal circuit of a lightning indirect effect protection module for communication signals according to the present invention;
fig. 3 is a diagram of the effect of suppressing DO160G standard level 4 lightning current waveform of the lightning indirect effect protection module of the utility model of communication signal;
fig. 4 is a schematic diagram of the insertion loss of the lightning indirect effect protection module of the present invention;
fig. 5 is a schematic diagram of the voltage standing wave ratio of the lightning indirect effect protection module of the utility model.
Wherein, the device comprises a 1-signal input end, a 2-lightning protection circuit, a 3-signal converter, a 4-grounding end and a 5-shell.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The utility model relates to a lightning indirect effect protection module of high-speed signal, as shown in fig. 1, including casing 5, signal input part 1, lightning protection circuit 2, signal converter 3 have connected gradually in casing 5, lightning protection circuit 2 is connected with earthing terminal 4.
Specifically, lightning protection circuit 2 is including the first protective device, second protective device and the third protective device that connect gradually, first protective device and second protective device set up between signal path and earthing terminal, and the third protective device establishes ties on signal path.
Specifically, the first protection device adopts a PT640TA semiconductor discharge tube, the second protection device adopts a SMCJ7.5CA transient suppression diode, and the third protection device adopts magnetic beads.
The utility model discloses a first protective device instantaneous overcurrent of releasing, then through second protective device clamper overvoltage, reduce the energy that the indirect effect of thunder and lightning produced, through the third protective device at last, carry out high frequency suppression and current-limiting to the residual energy. Further reduce the residual energy, guarantee the safety of the latter stage circuit to the utmost extent. As shown in fig. 3, through the utility model relates to a communication signal's indirect effect of thunder and lightning protection module, lightning current interference waveform is suppressed by a wide margin.
Because the response time of the semiconductor discharge tube is slower than that of the transient suppression diode, theoretically, after the semiconductor discharge tube G1 and the suppression diode D1 are connected in parallel, the suppression diode D1 is firstly switched on with the semiconductor discharge tube, so that lightning current is leaked, and after the suppression diode D1 is switched on, a part of energy is leaked, so that the semiconductor discharge tube G1 is not enough switched on, and the semiconductor discharge tube cannot work. Therefore, furthermore, an anti-surge resistor R1 is arranged between the semiconductor discharge tube G1 and the transient suppression diode D1, and after a lightning signal is input, the turn-on sequence of the semiconductor discharge tube G1 and the turn-on sequence of the suppression diode D1 are changed through the current limiting effect of the resistor R1, so that the whole circuit works according to the sequence that the first stage is turned on first and the second stage is turned on later, and current and voltage are effectively discharged respectively.
For guaranteeing that useful radio frequency signal does not excessively attenuate because of lightning protection circuit 2, the utility model discloses to this protection module the measurement of insertion loss and voltage standing wave ratio has been carried out, as shown in fig. 4 and fig. 5, the measuring result proves that in 100MHz to 1GHz frequency range, useful radio frequency signal can be guaranteed to pass through smoothly by this module.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. For those skilled in the art to which the invention pertains, equivalent substitutions or obvious modifications may be made without departing from the scope of the invention, and the same properties or uses are to be considered within the scope of the invention as defined by the claims as filed.
Claims (6)
1. The utility model provides a communication signal's thunder and lightning indirect effect protection module which characterized in that: the lightning protection device comprises a shell, wherein a signal input end, a lightning protection circuit and a signal output end are sequentially connected in the shell, and the lightning protection circuit is grounded;
the lightning protection circuit comprises a first protection device, a second protection device and a third protection device which are connected in sequence, wherein the first protection device and the second protection device are arranged between a signal path and a grounding end, and the third protection device is connected in series on the signal path.
2. The protection module of claim 1, wherein: still include anti-surge resistance, anti-surge resistance sets up on first protective device and second protective device.
3. The protection module of claim 1, wherein: and the signal input end, the lightning protection circuit and the signal output end are electrically connected through cables.
4. The protection module of claim 1, wherein: the shell is mechanically fixed on the protected equipment through the flange holes and the screws and is reliably grounded.
5. The protection module of claim 1, wherein: the first protection device, the second protection device and the third protection device are surface-mounted devices welded on the PCB.
6. The protection module of claim 1, wherein: the first protection device is a PT640TA semiconductor discharge tube, the second protection device is a SMCJ7.5CA transient suppression diode, and the third protection device is a magnetic bead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921717814.1U CN210957784U (en) | 2019-10-14 | 2019-10-14 | Lightning indirect effect protection module of communication signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921717814.1U CN210957784U (en) | 2019-10-14 | 2019-10-14 | Lightning indirect effect protection module of communication signal |
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| Publication Number | Publication Date |
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| CN210957784U true CN210957784U (en) | 2020-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921717814.1U Active CN210957784U (en) | 2019-10-14 | 2019-10-14 | Lightning indirect effect protection module of communication signal |
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| CN (1) | CN210957784U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112636317A (en) * | 2020-12-30 | 2021-04-09 | 洛阳伟信电子科技有限公司 | Lightning indirect effect protection method for airborne voltage capacitance sensitive scene |
-
2019
- 2019-10-14 CN CN201921717814.1U patent/CN210957784U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112636317A (en) * | 2020-12-30 | 2021-04-09 | 洛阳伟信电子科技有限公司 | Lightning indirect effect protection method for airborne voltage capacitance sensitive scene |
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