CN205029337U - A protector for antenna and feed -line system - Google Patents
A protector for antenna and feed -line system Download PDFInfo
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- CN205029337U CN205029337U CN201520692758.6U CN201520692758U CN205029337U CN 205029337 U CN205029337 U CN 205029337U CN 201520692758 U CN201520692758 U CN 201520692758U CN 205029337 U CN205029337 U CN 205029337U
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- coaxial cable
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Abstract
The utility model discloses a protector for antenna and feed -line system belongs to the communications field. This protector is including shielding box body, center conductor, glass gas discharge tube, transient state voltage suppressor, a coaxial connector and the 2nd coaxial connector, and this center conductor, glass gas discharge tube and transient state voltage suppressor all set up at this shielding case internally, and a coaxial connector and the 2nd coaxial connector set up the center conductor 3 at the shielding box body respectively. The utility model provides a protector for antenna and feed -line system adopts two -stage protection circuit design, utilizes the coaxial configuration heart yearn to adjust cooperation of two interstage times and energy cooperation as decoupling inductance, utilize coaxial configuration transmission sky to present the signal to regard aluminium system casing as the screening can, make whole protection module both can satisfy protection nanosecond level electromagnetic pulse's response speed and earial drainage ability, again to not influence of the transmission of the normal signal of antenna and feed -line system shortwave 3 -30MHz frequency channel.
Description
Technical field
The utility model relates to the communications field, particularly for the protector of antenna-feedback system.
Background technology
Many scholars and research institution is had to carry out a large amount of research work to the protector for antenna-feedback system, mainly for the preventing principle of Lightning Electromagnetic Pulse and the research of technology.And the protector protected for antenna-feedback system is at present the Lightning Electromagnetic Pulse for musec order mostly, this kind of protector can not be applicable to the response speed of nanosecond Spark gap.Meanwhile, the existing Spark gap module on antenna-feedback system protection has impact to Signal transmissions, and insertion loss is larger.
Utility model content
In order to solve at least one aspect of the above-mentioned problems in the prior art and defect, the utility model provides a kind of protector for antenna-feedback system.Described technical scheme is as follows:
An object of the present utility model there is provided a kind of protector for antenna-feedback system.
According to an aspect of the present utility model, provide a kind of protector for antenna-feedback system, described protector comprises shielding box body, center conductor, glass gas-discharge pipe, transient voltage suppressor, the first coaxial cable connector and the second coaxial cable connector, described center conductor, glass gas-discharge pipe and transient voltage suppressor are all arranged in described shielding box body, and described first coaxial cable connector and the second coaxial cable connector are separately positioned on the opposite end of described shielding box body.
Further, described center conductor is arranged in described shielding box body along the longitudinally of described shielding box body.
Particularly, connect described glass gas-discharge pipe in one end of the described center conductor near described first coaxial cable connector, connect transient voltage suppressor at the other end of the described center conductor near described second coaxial cable connector.
Further, described glass gas-discharge pipe and described transient voltage suppressor are all arranged in described shielding box body along the direction of the longitudinally perpendicular to described shielding box body.
Particularly, one end of described glass gas-discharge pipe is connected with described center conductor, and the other end of described glass gas-discharge pipe is connected with the inner surface of described shielding box body,
One end of described transient voltage suppressor is connected with described center conductor, and the other end of described transient voltage suppressor is connected with the inner surface of described shielding box body.
Further, described first coaxial cable connector is connected with the coaxial feeder in described antenna-feedback system, described second coaxial cable connector with in described antenna-feedback system needed for the arrival end of system that protects be connected.
Particularly, described first coaxial cable connector and described second coaxial cable connector include conductive shell and are arranged on the conductive core in described conductive shell along the longitudinally of described conductive shell, and described first coaxial cable connector is connected with the two ends of described center conductor respectively with the described conductive core of described second coaxial cable connector.
Further, respectively longitudinally is provided with the first centre bore and the second centre bore in the center at the two ends of described center conductor, the described conductive core of described first coaxial cable connector is contained in described first centre bore, and the described conductive core of described second coaxial cable connector is contained in described second centre bore.
Particularly, described shielding box body is set to cuboid, the inner chamber of described shielding box body is cylinder, the two ends of described shielding box body are respectively arranged with end cap, the center of described end cap is provided with circular hole, described first coaxial cable connector is connected with described first centre bore of described center conductor after through the described circular hole of corresponding described end cap
Described second coaxial cable connector is connected with described second centre bore of described center conductor after through the described circular hole of corresponding described end cap.
Particularly, described first coaxial cable connector and the second coaxial cable connector are threaded to the corresponding end cap on described shielding box body respectively, and described center conductor and described conductive core are welded to connect.
The beneficial effect of the technical scheme that the utility model provides is:
(1) protector for antenna-feedback system that the utility model provides adopts the design of two-stage protection circuit, utilizes coaxial configuration heart yearn to regulate time coordination and the energy coordination of two inter-stages as decoupling inductor;
(2) protector for antenna-feedback system that the utility model provides utilizes coaxial configuration to transmit sky feedback signal, utilize aluminium casing as screening can, make whole protection module both can reach the protection response speed of nanosecond electromagnetic pulse, surge energy in antenna-feedback system can be coupled to by vent discharge magnetic field impulse again, the transmission of antenna-feedback system shortwave 3-30MHz frequency range normal signal is not affected.
Accompanying drawing explanation
Fig. 1 is the structural representation of the protector for antenna-feedback system according to an embodiment of the present utility model;
Fig. 2 is the center conductor shown in Fig. 1, glass gas-discharge pipe and the transient voltage suppressor device structural representation in shielding box body;
Fig. 3 a is the front view of the shielding box body shown in Fig. 1;
Fig. 3 b is the end view of the shielding box body shown in Fig. 1;
Fig. 4 is the structural representation of the end cap of the shielding box body shown in Fig. 1;
Fig. 5 is the circuit diagram of the protector for antenna-feedback system shown in Fig. 1;
Fig. 6 is the structural representation of the center conductor shown in Fig. 2;
Wherein, 100 for the protector of antenna-feedback system, 10 shielding box bodys, the inner chamber of 11 shielding box bodys, the end cap of 12 shielding box bodys, the circular hole on 121 end caps, 20 center conductors, 21 first centre bores, 22 second centre bores, 30 glass gas-discharge pipes, 40 transient voltage suppressor, 51 first coaxial cable connectors, 52 second coaxial cable connectors.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model execution mode is described in further detail.
See Fig. 1, it illustrates the protector 100 for antenna-feedback system according to an embodiment of the present utility model.Shown in composition graphs 2, protector 100 comprises shielding box body 10, center conductor 20, glass gas-discharge pipe 30, transient voltage suppressor 40, first coaxial cable connector 51 and the second coaxial cable connector 52.Particularly, center conductor 20, glass gas-discharge pipe 30 and transient voltage suppressor 40 are all arranged in shielding box body 10, and the first coaxial cable connector 51 and the second coaxial cable connector 52 are separately positioned on the opposite end of shielding box body 10.
Nanosecond electromagnetic pulse electric current all can be introduced antenna-feedback system to the coupling of antenna or when directly conducting by nanosecond pulse, conducted by feeder line again and then make big current high voltage enter the receiving equipment of antenna-feedback system rear end, and the electromagnetic pulse tolerance value of general rear end equipment is very low, so in order to ensure that communication system normally works, electromagnetic pulse must be released before feeder line enters back-end system arrival end in electromagnetic pulse.Need thus to install protector additional between feeder line and back-end system arrival end.In an example of the present utility model, first coaxial cable connector (such as BNC female) 51 is connected with the feeder line (not shown) in antenna-feedback system, the second coaxial cable connector (such as BNC female) 52 with in antenna-feedback system needed for the arrival end (not shown) of system that protects be connected.
In another example of the present utility model, appropriate design protector 100 physical dimension, makes its wave impedance be 50 ohm, matches with antenna feeder wave impedance 50 ohm.Can not be there is the catadioptric of ripple in the sky feedback signal transmitted through protector 100 like this, can ensure the quality of Signal transmissions.
Shown in composition graphs 3a to Fig. 4, in an example of the present utility model, shielding box body 10 is for having the cuboid of cylindrical inner chamber 11, and center conductor 20 is arranged in shielding box body 10 along the longitudinally of shielding box body 10.Be respectively arranged with end cap 12 at the two ends of shielding box body 10, be provided with the circular hole 121 passed through for the first coaxial cable connector 51 and the second coaxial cable connector 52 in the center of end cap 12.Certain those skilled in the art can understand, shielding box body 10 can be set to the shape such as cylinder or square, the inner chamber of shielding box body 10 also can be set to the shape such as cuboid or square as required, difference is only the correction for wave impedance formula, this example is only a kind of illustrated examples, not should be understood to one restriction of the present utility model.
First coaxial cable connector 51 and the second coaxial cable connector 52 include conductive shell (not shown) and are arranged on the conductive core in conductive shell along the longitudinally of conductive shell, realize electric insulation between conductive shell and conductive core by air and dielectric.Correspondingly, shown in composition graphs 2 and Fig. 6, and respectively longitudinally is provided with the first centre bore 21 and the second centre bore 22 in the center at the two ends of center conductor 20.By such design, the first coaxial cable connector 51 is contained in the first centre bore 21 of center conductor 20 after through the circular hole 121 of corresponding end cap 12, and is connected with the first centre bore 21 of center conductor 20; Second coaxial cable connector 52 is contained in the second centre bore 22 of center conductor 20 after through the circular hole 121 of corresponding end cap 12, and is connected with the second centre bore 22 of center conductor 20.In an also example of the present utility model, first coaxial cable connector 51 is connected respectively by the left and right face of screw and nut with shielding box body 10 with the conductive shell of the second coaxial cable connector 52, certain those skilled in the art can understand, first coaxial cable connector 51 can also be connected with shielding box body 10 by modes such as welding or buckle connections with the second coaxial cable connector 52, this example is only a kind of illustrated examples, not should be understood to one restriction of the present utility model.
Shown in composition graphs 2 and Fig. 5, connect glass gas-discharge pipe (SPG) 30 in one end of the center conductor 20 near the first coaxial cable connector 51, connect transient voltage suppressor (TVS) 40 at the other end of the center conductor 20 near the second coaxial cable connector 52.Therefore the method that the utility model adopts is exactly that this protector is made up of two-stage, prime gas discharge tube through-current capability is strong, but rear class transient suppressor through-current capability weak clamper ability is strong, fast response time, therefore coordinated by design protection, when electromagnetic pulse is arrived, rear class device makes an immediate response temporary transient clamper, prime device activity is made by the voltage lifting effect of decoupling inductor, release large energy to ground, a small amount of transient voltage suppressor arranged in the second level afterwards in remaining electric current carries out electromagnetic pulse and is absorbed into ground, and accurately complete voltage clamp effect, the electric current and voltage that the equipment of rear end is born is within its tolerance value.Also have a key point to be the time, the electromagnetic pulse time, transient suppressor can respond in time in nanosecond, and rear end is protected rapidly.
Glass gas-discharge pipe 30 and transient voltage suppressor 40 are all arranged in shielding box body 10 along the direction of the longitudinally perpendicular to shielding box body 10, and one end of glass gas-discharge pipe 30 is connected with one end of the first centre bore 21 near center conductor 20, the other end of glass gas-discharge pipe 30 is connected with the inner surface of shielding box body 10; One end of transient voltage suppressor 40 is connected with one end of the second centre bore 22 near center conductor 20, and the other end of transient voltage suppressor 40 is connected with the inner surface of shielding box body 10.Certain those skilled in the art can understand, glass gas-discharge pipe 30 and transient voltage suppressor 40 and center conductor 20 and/or shield box body 10 when being connected, can be connected by wire, also by the conductive part of glass gas-discharge pipe 30 and transient voltage suppressor 40 with center conductor 20 and/or contact, or glass gas-discharge pipe 30 and transient voltage suppressor 40 can be clamped between shielding box body 10 and center conductor 20.This example is only a kind of illustrated examples, not should be understood to one restriction of the present utility model.
By the design of glass gas-discharge pipe 30 and transient voltage suppressor 40, protector 100 is made to have two stages of circuit design and height-low fit system.Wherein, the protective device gas discharge tube that one-level usage operation voltage is high, through-current capability is strong, such as electric capacity only has the glass gas-discharge pipe 30 of 0.8pF, the ceramic gas discharge tube that the junction capacitance of this discharge tube uses in protection in the past, very favourable for antenna-feedback system Signal transmissions; Secondary usage operation voltage is low, fast response time and the good protective device transient voltage suppressor (i.e. TVS) 40 of clamper ability, and TVS parasitic capacitance value is larger.The type selecting of this secondary transient voltage suppressor can be determined by the normal working voltage of antenna-feedback system.Such as meeting high-frequency work demand, can use low capacitance TVS, such as selecting model to be the TVS of SAC5.0, its parasitic capacitance is at below 50pF, little on the impact of shortwave frequency range.This example is only a kind of illustrated examples, not should be understood to one restriction of the present utility model.
Decoupling inductor (such as center conductor 20) is also provided with between the glass gas-discharge pipe 30 and the transient voltage suppressor 40 of secondary of one-level, the value of decoupling inductor can be utilized to regulate time coordination and the energy coordination of one or two inter-stages, and can also reduce electromagnetic pulse carrys out wave steepness simultaneously.
Secondary transient voltage suppressor 40 pairs of nanosecond electromagnetic pulses can also be made to respond fast by the cooperation of two-stage protective device (i.e. glass gas-discharge pipe 30 and transient voltage suppressor 40), and under the effect of decoupling inductor (such as center conductor 20), make gas discharge tube (i.e. glass gas-discharge pipe 30) release within the cooperation time most of electromagnetic pulse energy, and then transient voltage suppressor 40 accurate clamper further, this decoupling inductor is replaced by coaxial configuration heart yearn (i.e. center conductor 20) as calculated.
The impedance of the coaxial configuration that the utility model adopts is determined by physical dimension size, such as, can calculate acquisition by following formula:
Under air dielectric condition, if consider internal inductance, then can be calculated:
Work as R
2/ R
1=2.05, wave impedance is 50ohm;
Considering kelvin effect under shortwave, and ignoring the impact of internal inductance, can obtain:
Work as R
2/ R
1=2.30, wave impedance is 50ohm;
Wherein, R
1centered by the radius of conductor, R
2for shielding the internal diameter of the inner chamber of box body, μ
0for permeability of vacuum, μ
r1, μ
rbe respectively center conductor material and air relative permeability, ε
o, ε
rbe respectively permittivity of vacuum and air relative dielectric constant, l
0, c
0, z
0be respectively unit length inductance capacitance and the wave impedance of the cable (i.e. center conductor) of design.
When designing, consider that inductance decoupling has good effect to high frequency, although resistance decoupling can not cause dispersion, insertion loss affects communication system signal and receives, and therefore uses inductance decoupling.Because inductance is connected into holding wire, wave impedance certainly will be caused discontinuous, and affect high frequency insertion loss, use the inductance of cable own to complete decoupling thus as far as possible.For determining the inductance value coordinated, can simply estimate when designing:
Wherein, U
afor the operation voltage of the glass gas-discharge pipe of one-level, U
bfor the clamp voltage after the transient voltage suppressor action of secondary.
Based on conclusions, can estimate L value, it is 1ns/kA that the rate of climb is got in pulse, and one-level uses RX098GDT, and ensure its action in 100ns, by actual measurement, impact coefficient need more than 5.5, U
aget 600V.Pressure sensitive voltage is generally chosen for the operating voltage of 1.1 times.And antenna-feedback system feeder line operating voltage is general lower, therefore U can be ignored
bvalue.Thus.L=0.6nH can be obtained.Known by calculating, work as R
2/ R
1when=2.30, l
0=0.194 μ H/m, the coaxial cable core wire choosing cm-level length interval can meet requirement of shelter, i.e. the heart yearn cable of coaxial configuration design itself can be used as decoupling inductor and uses.The wave impedance discontinuous problem existed after utilizing the decoupling of cable own can not only solve connection lumped inductance, and can the problem causing signal distortion thus be solved; And simplifying difficulty of processing, the length also by calculating cable accurately controls inductance value size.
In an example of the present utility model, the first coaxial cable connector 51 and the second coaxial cable connector 52 are threaded to the corresponding end cap on shielding box body 10 respectively, and center conductor 20 and conductive core are welded to connect.
Protector 100 of the present utility model can solve antenna-feedback system nanosecond Spark gap problem under the condition not affecting short wave communication 3-30MHz frequency band signals transmission quality.
The beneficial effect of the technical scheme that the utility model provides is:
(1) protector for antenna-feedback system that the utility model provides adopts the design of two-stage protection circuit, utilizes coaxial configuration heart yearn to regulate time coordination and the energy coordination of two inter-stages as decoupling inductor;
(2) protector for antenna-feedback system that the utility model provides utilizes coaxial configuration to transmit sky feedback signal, utilize aluminium casing as screening can, make whole protection module both can reach the protection response speed of nanosecond electromagnetic pulse, surge energy in antenna-feedback system can be coupled to by vent discharge magnetic field impulse again, the transmission of antenna-feedback system shortwave 3-30MHz frequency range normal signal is not affected.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (10)
1., for a protector for antenna-feedback system, it is characterized in that,
Described protector comprises shielding box body, center conductor, glass gas-discharge pipe, transient voltage suppressor, the first coaxial cable connector and the second coaxial cable connector, described center conductor, glass gas-discharge pipe and transient voltage suppressor are all arranged in described shielding box body, and described first coaxial cable connector and the second coaxial cable connector are separately positioned on the opposite end of described shielding box body.
2. the protector for antenna-feedback system according to claim 1, is characterized in that,
Described center conductor is arranged in described shielding box body along the longitudinally of described shielding box body.
3. the protector for antenna-feedback system according to claim 2, is characterized in that,
Connect described glass gas-discharge pipe in one end of the described center conductor near described first coaxial cable connector, connect described transient voltage suppressor at the other end of the described center conductor near described second coaxial cable connector.
4. the protector for antenna-feedback system according to claim 3, is characterized in that,
Described glass gas-discharge pipe and described transient voltage suppressor are all arranged in described shielding box body along the direction of the longitudinally perpendicular to described shielding box body.
5. the protector for antenna-feedback system according to claim 4, is characterized in that,
One end of described glass gas-discharge pipe is connected with described center conductor, and the other end of described glass gas-discharge pipe is connected with the inner surface of described shielding box body,
One end of described transient voltage suppressor is connected with described center conductor, and the other end of described transient voltage suppressor is connected with the inner surface of described shielding box body.
6. the protector for antenna-feedback system according to any one of claim 1-5, is characterized in that,
Described first coaxial cable connector is connected with the coaxial feeder in described antenna-feedback system, described second coaxial cable connector with in described antenna-feedback system needed for the arrival end of system that protects be connected.
7., according to the protector for antenna-feedback system described in claim 6, it is characterized in that,
Described first coaxial cable connector and described second coaxial cable connector connector include conductive shell and are arranged on the conductive core in described conductive shell along the longitudinally of described conductive shell, and described first coaxial cable connector is connected with the two ends of described center conductor respectively with the described conductive core of described second coaxial cable connector.
8. the protector for antenna-feedback system according to claim 7, is characterized in that,
Respectively longitudinally is provided with the first centre bore and the second centre bore in the center at the two ends of described center conductor, the described conductive core of described first coaxial cable connector is contained in described first centre bore, and the described conductive core of described second coaxial cable connector is contained in described second centre bore.
9. the protector for antenna-feedback system according to claim 8, is characterized in that,
Described shielding box body is set to cuboid, the inner chamber of described shielding box body is cylinder, the two ends of described shielding box body are respectively arranged with end cap, the center of described end cap is provided with circular hole, described first coaxial cable connector is connected with described first centre bore of described center conductor after through the described circular hole of corresponding described end cap
Described second coaxial cable connector is connected with described second centre bore of described center conductor after through the described circular hole of corresponding described end cap.
10. the protector for antenna-feedback system according to claim 9, is characterized in that,
Described first coaxial cable connector and the second coaxial cable connector are threaded to the corresponding end cap on described shielding box body respectively, and described center conductor and described conductive core are welded to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520692758.6U CN205029337U (en) | 2015-09-08 | 2015-09-08 | A protector for antenna and feed -line system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520692758.6U CN205029337U (en) | 2015-09-08 | 2015-09-08 | A protector for antenna and feed -line system |
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| Publication Number | Publication Date |
|---|---|
| CN205029337U true CN205029337U (en) | 2016-02-10 |
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ID=55261841
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520692758.6U Active CN205029337U (en) | 2015-09-08 | 2015-09-08 | A protector for antenna and feed -line system |
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| Country | Link |
|---|---|
| CN (1) | CN205029337U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450617A (en) * | 2016-11-30 | 2017-02-22 | 深圳市速联技术有限公司 | Novel broadband transient electromagnetic pulse suppressor |
-
2015
- 2015-09-08 CN CN201520692758.6U patent/CN205029337U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450617A (en) * | 2016-11-30 | 2017-02-22 | 深圳市速联技术有限公司 | Novel broadband transient electromagnetic pulse suppressor |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211108 Address after: Room 08-10, 6 / F, block a, No. 5, Dongtucheng Road, Chaoyang District, Beijing 100013 Patentee after: National Petroleum and natural gas pipeline network Group Co.,Ltd. Address before: 100007 Oil Mansion, 9 North Avenue, Dongcheng District, Beijing, Dongzhimen Patentee before: PETROCHINA Co.,Ltd. |
|
| TR01 | Transfer of patent right |