CN201533163U - Broadband low residual voltage antenna feeder lightning protection device - Google Patents
Broadband low residual voltage antenna feeder lightning protection device Download PDFInfo
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- CN201533163U CN201533163U CN2009203107325U CN200920310732U CN201533163U CN 201533163 U CN201533163 U CN 201533163U CN 2009203107325 U CN2009203107325 U CN 2009203107325U CN 200920310732 U CN200920310732 U CN 200920310732U CN 201533163 U CN201533163 U CN 201533163U
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- pipe
- lightning protection
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Abstract
The utility model relates to lightning protection technique, in particular to a broadband low residual voltage antenna feeder lightning protection device, which resolves problems of low lightning current discharge, high residual voltage and incapability of obtaining relatively broad working frequency range of lightning protection devices in the prior art. The technical scheme mainly includes that the lightning protection device comprises a capacitor C1, an inductor L1, an inductor L2, a first gas release pipe, a capacitor C2, a capacitor C3, an inductor L3 and a second gas release pipe; the capacitors C1, the capacitor C2, the capacitor C3 are connected in parallel, and then connected in series with the inductor L1, the first gas release pipe, the second gas release pipe and the inductor L2 to form a closed loop; one end of the inductor L3 is connected to the inductor L1 and a node of the first gas release pipe, and the other end of the inductor L3 is connected with the inductor L2 and a node of the second gas release pipe; and the first gas release pipe is connected to the ground. The lightning protection device has the advantages of broad working frequency range, low residual voltage, and particular applicability in communication base stations.
Description
Technical field
The utility model relates to shocking preventing technology, relates in particular to the low residual voltage antenna feeder lightning protection device of a kind of wideband.
Background technology
When mechanics of communication was maked rapid progress development, it is particularly important that shocking preventing technology also seems.For example in antenna-feedback system,, when lightning current arrives, will produce strong low-frequency interference signal, influence the communication between the user if there is not thunder resisting equipment.Even more serious is that the huge surge of generation burns out equipment most probably, causes economic loss.Lightning protection device of the prior art comprises that capacitor C 1, inductance L 1, inductance L 2, gas puts pipe; Capacitor C 1, inductance L 1, inductance L 2 are put to manage with gas and are connected, and gas is put pipe ground connection.Mainly be to utilize electric capacity and inductance to form filter the interference signal that thunder and lightning causes is suppressed, and utilize the pressure-sensitive character that gas is put pipe that lightning current is released.There is shortcoming in lightning protection device of the prior art: (1) only adopts one-level gas to put pipe, and is low to the lightning current degree of releasing, residual voltage height, poor stability.(2) adopt single capacitor and inductance to form filter, can't obtain the broad operating frequency range.
The utility model content
Technical problem to be solved in the utility model is: propose the low residual voltage antenna feeder lightning protection device of a kind of wideband, solve the problem that lightning protection device of the prior art is released to lightning current that degree is low, residual voltage is high and can't be obtained the broad operating frequency range.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: wideband hangs down residual voltage antenna feeder lightning protection device, comprises that capacitor C 1, inductance L 1, inductance L 2, first gas puts pipe, comprises that also capacitor C 2, capacitor C 3, inductance L 3 and second gas puts pipe; Described capacitor C 1, capacitor C 2, capacitor C 3 backs in parallel and inductance L 1, first gas put that pipe, second gas are put pipe, inductance L 2 is composed in series the closed-loop path; The described inductance L 3 one ends connection inductance L 1 and first gas are put the node of pipe, and the other end connection inductance L 2 and second gas are put the node of pipe; Described first gas is put pipe and is connected ground.
Described first gas is put pipe, second gas and is put pipe and be three grades of gas and put pipe.
Described capacitor C 1, capacitor C 2 are all selected the electric capacity of 10～30PF capacity for use, and described capacitor C 3 is selected the electric capacity of 8000～10000PF capacity for use.
Described inductance L 3 adopts the magnetic core inductance.
The beneficial effects of the utility model are: operating frequency range is wide, residual voltage is low.
Description of drawings
Fig. 1 is the utility model electrical block diagram.
Among the figure, GDT1 is that first gas is put pipe, and GDT2 is that second gas is put pipe.
Embodiment
The utility model will be further described below in conjunction with drawings and Examples.
The utility model proposes the low residual voltage antenna feeder lightning protection device of a kind of wideband, solve the problem that lightning protection device of the prior art is released to lightning current that degree is low, residual voltage is high and can't be obtained the broad operating frequency range.It comprises that capacitor C 1, inductance L 1, inductance L 2, first gas puts pipe, comprises that also capacitor C 2, capacitor C 3, inductance L 3 and second gas puts pipe; Described capacitor C 1, capacitor C 2, capacitor C 3 backs in parallel and inductance L 1, first gas put that pipe, second gas are put pipe, inductance L 2 is composed in series the closed-loop path; The described inductance L 3 one ends connection inductance L 1 and first gas are put the node of pipe, and the other end connection inductance L 2 and second gas are put the node of pipe; Described first gas is put pipe and is connected ground.
Embodiment:
As shown in Figure 1, lightning protection device in this example puts pipe by capacitor C 1, capacitor C 2, capacitor C 3, inductance L 1, inductance L 2, inductance L 3, first gas and second gas is put pipe and constituted, and described capacitor C 1, capacitor C 2, capacitor C 3 backs in parallel and inductance L 1, first gas put that pipe, second gas are put pipe, inductance L 2 is composed in series the closed-loop path; The described inductance L 3 one ends connection inductance L 1 and first gas are put the node of pipe, and the other end connection inductance L 2 and second gas are put the node of pipe; Described first gas is put pipe and is connected ground.
Its key points in design is to adopt low frequency and high-frequency circuit, forms low pass filter and high pass filter, and the low-frequency interference signal that electric capacity causes for indirect lightning strike has high inhibitory action, and is very little to the radiofrequency signal decay of high frequency; High-frequency circuit adopts capacitor C 1, capacitor C 2, and for reaching the effect of filtering thunder and lightning interference signal preferably, we select the electric capacity of 10～30PF capacity and high Q value, high-temperature coefficient, high withstand voltage for use; Capacitor C 1, capacitor C 2, inductance L 1, inductance L 2 are formed the ∏ mode filter, make entire circuit resonance in 1880MHZ～2500MHZ, and loss≤0.3dB is inserted in standing-wave ratio≤1.2; Low pass filter adopts capacitor C 3, in order to reach the effect of filtering thunder and lightning interference signal preferably, select the electric capacity of 9000PF (all suitable) capacity for use through putting into practice 8000PF～10000PF capacity, cooperate first gas to put pipe GDT1, GDT2 and guarantee intermediate-freuqncy signal low-loss passing through smoothly, circuit work frequency 2MHZ～5MHZ, return loss＞18dB inserts loss≤0.2dB, this whole device just can work in the transmission signals of high frequency and intermediate frequency simultaneously, has promptly obtained the operating frequency range of broad.
In addition, also utilized sensitiveness and the non-linear principle of switching mode device to voltage, adopt 3 grades of gas to put tube elements as the earial drainage branch road, but trouble free service is lower than 36V, output current greater than 20A, system that the internal resistance of source is little in direct voltage, avoided since gas put pipe in the high power-supply system of direct voltage because the phenomenon of arc is not put out in the afterflow that the surge pulse causes, thereby also avoided putting pipe action and damaging power-supply system owing to gas, safe.
Moreover the utility model also adopts synthetic two-stage protection circuit group of two-stage switching mode set of devices and DC feedback protection circuit.The front and back stages protection, inter-stage adopts the decoupling inductance ability of carrying out to isolate, when guaranteeing that the lightning current shock wave arrives, first gas put the pipe GDT1 most of energy is released over the ground, dump energy is coupled to output port by capacitor C 1, capacitor C 2, capacitor C 3, inductance L 3, puts pipe by second gas and carries out releasing the second time, makes the residual voltage of output port be lower than 50V, residual amount of energy is lower than 200mJ, has further satisfied the fail safe needs.Inductance L 3 is selected the magnetic core inductance for use as coupled apparatus, and inductance value is big.
The utility model is particularly useful for communication base station, and N-50K shown in Fig. 1 is an input, and SMA-50K is an output.
Claims (4)
1. the low residual voltage antenna feeder lightning protection device of wideband comprises that capacitor C 1, inductance L 1, inductance L 2, first gas puts pipe, it is characterized in that: comprise that also capacitor C 2, capacitor C 3, inductance L 3 and second gas puts pipe; Described capacitor C 1, capacitor C 2, capacitor C 3 backs in parallel and inductance L 1, first gas put that pipe, second gas are put pipe, inductance L 2 is composed in series the closed-loop path; The described inductance L 3 one ends connection inductance L 1 and first gas are put the node of pipe, and the other end connection inductance L 2 and second gas are put the node of pipe; Described first gas is put pipe and is connected ground.
2. wideband as claimed in claim 1 hangs down residual voltage antenna feeder lightning protection device, it is characterized in that: described first gas is put pipe, second gas and is put pipe and be three grades of gas and put pipe.
3. wideband as claimed in claim 1 or 2 hangs down residual voltage antenna feeder lightning protection device, and it is characterized in that: described capacitor C 1, capacitor C 2 are all selected the electric capacity of 10～30PF capacity for use, and described capacitor C 3 is selected the electric capacity of 8000～10000PF capacity for use.
4. wideband as claimed in claim 1 or 2 hangs down residual voltage antenna feeder lightning protection device, it is characterized in that: described inductance L 3 adopts the magnetic core inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203107325U CN201533163U (en) | 2009-09-18 | 2009-09-18 | Broadband low residual voltage antenna feeder lightning protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203107325U CN201533163U (en) | 2009-09-18 | 2009-09-18 | Broadband low residual voltage antenna feeder lightning protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201533163U true CN201533163U (en) | 2010-07-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203107325U Expired - Lifetime CN201533163U (en) | 2009-09-18 | 2009-09-18 | Broadband low residual voltage antenna feeder lightning protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201533163U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2009
- 2009-09-18 CN CN2009203107325U patent/CN201533163U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100721 |