CN201061135Y - Intermediate frequency feeder line surge protector - Google Patents
Intermediate frequency feeder line surge protector Download PDFInfo
- Publication number
- CN201061135Y CN201061135Y CNU2007200380650U CN200720038065U CN201061135Y CN 201061135 Y CN201061135 Y CN 201061135Y CN U2007200380650 U CNU2007200380650 U CN U2007200380650U CN 200720038065 U CN200720038065 U CN 200720038065U CN 201061135 Y CN201061135 Y CN 201061135Y
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- surge protector
- surge
- intermediate frequency
- electric capacity
- radio frequency
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Abstract
The utility model discloses an intermediate frequency feeder surge protective device used for the electrical surge protection of multi-core intermediate frequency feeder of the long-distance intermediate frequency cable between the indoor equipment of D-SCDMA system (base station and the remote subsystem, which comprises a surge protective device shell, at least two radio frequency connectors respectively at the input and output terminals, and a microstrip circuit board. Inside the surge protective device shell at least two enclosed independent chambers are separated transversely; in each chamber is provided with the electrical sure protective microstrip circuit board, of which the electric circuit comprises gas discharge tube G, surge resistance R, capacitor C1 and C2, an inductor L and a dual-way transient voltage suppressor TVS. The utility model is characterized in that the chambers in the surge protective device realizes the electromagnetic separation of the intermediate frequency information; thus the transmission performance index reaches a range of 6-200 MHz, with a standing wave coefficient is less than or equal to 1.1 and insertion loss is less than or equal to 0.5 d B.
Description
Technical field
The utility model relates to a kind of multicore intermediate frequency feedback surge protector; be particularly related in the 3G (Third Generation) Moblie TD-SCDMA system surge protector, this surge protector is used for the surge protection that intermediate frequency between base station indoor equipment and far-end subsystem zooms out cable multicore intermediate frequency feeder line.
Background technology
At present, existing intermediate frequency feedback surge protector adopts the forward and backward two-stage protection circuit that switching mode protective circuit and votage limit type protective circuit make up.This protection circuit and input radio frequency connector, output radio frequency connector connect into the surge protector of single unit, and the protection circuit of this surge protector is formed by decoupling component and voltage limit device serial connection, can play the effect that progressively weakens surge.Front stage circuits adopts gas discharge tube slightly to protect, when having surge to flow into, and the lot of energy of releasing; Late-class circuit adopts Transient Suppression Diode and is equipped with diode array to carry out the precision protection; the voltage limit that makes the surge protector output is within the bearing capacity scope of this protector equipment of use; connect by decoupling component (surge resistance) between the two-stage in the protective circuit; the indoor and outdoor system that makes electromagnetic induction that thunder and lightning produces on cable and static induced current enter the base station; release effectively lightning current on the feeder line, the protecting group station equipment is not struck by lightning.But the standing-wave ratio and the insertion loss of the surge protector that the application sort circuit constitutes are bigger, influence the signal transmission.
Summary of the invention
In order to overcome existing intermediate frequency feedback surge protector transmission performance defect of insufficient; the utility model provides a kind of intermediate frequency feedback surge protector; this protector structure is simple; good surge protection performance can be provided, satisfy base station indoor equipment and protection of the multicore intermediate frequency feedback surge between the far-end subsystem and transmission requirement in the TD-SCDMA system.
The purpose of this utility model can be achieved by the following technical programs.
A kind of intermediate frequency feedback surge protector comprises surge protector housing, input radio frequency connector, output radio frequency connector, micro belt board.At least 2 of described input radio frequency connectors, each radio frequency connector stretch in the surge protector housing, and its inner wire is welded on the input of micro belt board, and outer conductor is connected with a side of surge protector housing by screw thread.At least 2 of described output radio frequency connectors, each radio frequency connector stretch in the surge protector housing, and its inner wire is welded on the output of micro belt board, and outer conductor is connected by the opposite side of screw thread with the surge protector housing.Described surge protector housing by screw on base station equipment.The individual cavity of the mutual separation of sealing is equipped with identical surge protection micro belt board around laterally being separated at least 2 in the described surge protector housing in described each cavity, and described micro belt board is fixed in the cavity with securing member.
The purpose of this utility model can also further realize by following technology solution.
Described surge protector housing is the container-like metal shell that the top can be closed with cap seal, and its bottom is an overall structure with the sidewall that extends from bottom vertical.
The circuit of described micro belt board mainly is made up of gas discharge tube G, surge resistance R, capacitor C 1, capacitor C 2, inductance L and two-way Transient Suppression Diode TVS; form the thick protective circuit of prime by gas discharge tube G and surge resistance R and capacitor C 1, form back level high-pass filtering circuit by capacitor C 2, inductance L and two-way Transient Suppression Diode TVS.Described gas discharge tube G cross-over connection is connected in series capacitor C 1 behind the circuit of described input via surge resistance R and capacitor C 1 parallel connection again between microstrip transmission line input and ground wire, connect the microstrip transmission line output then; Described inductance L cross-over connection is between the tie point and ground wire of capacitor C 1 and capacitor C 2, and described two-way Transient Suppression Diode TVS cross-over connection is between the tie point and ground wire of capacitor C 2 and microstrip transmission line output.
The beneficial effects of the utility model are: owing to be provided with the individual cavity of a plurality of mutual separations in the surge protector housing; the bottom of housing is an overall structure with the sidewall that extends from bottom vertical; between each cavity intermediate-freuqncy signal high electromagnetic isolation, interport isolation 〉=80dB have been realized.This surge protecting circuit has adopted the microstrip transmission line design; overcome the shortcoming of existing transmission performance indicators deficiency; transmission performance indicators reaches standing-wave ratio≤1.1 in the 6-200MHz frequency range; insert loss≤0.5dB, intermediate frequency feedback surge protector of the present invention has few, the advantages of simple structure and simple of number of elements.
Advantage of the present utility model and characteristics will illustrate by the non-limitative illustration of following preferred embodiment and explain that these embodiment only provide as an example with reference to accompanying drawing.
Description of drawings
Fig. 1 is a structure diagram of the present utility model.
Fig. 2 is the A-A cutaway view of Fig. 1.
Fig. 3 is the circuit theory diagrams of prior art.
Fig. 4 is circuit theory diagrams of the present utility model.
Embodiment:
The utility model is described in further detail below in conjunction with drawings and Examples:
The structure of the intermediate frequency feedback surge protector of present embodiment as shown in Figure 1, the input of this surge protector has 5 identical radio frequency connectors 4, the output of this surge protector housing 3 has 5 identical radio frequency connectors 1.Each radio frequency connector 4 of the input of this surge protector all stretches in the surge protector housing 3, and the inner wire 41 of radio frequency connector 4 is welded on the input 23 of micro belt board 2, and outer conductor 42 is connected with a side of surge protector housing 3 by screw thread.Each radio frequency connector 1 of the output of this surge protector stretches in the surge protector housing 3, and its inner wire 11 is welded on the output 21 of micro belt board 2, and outer conductor 12 is connected by the opposite side of screw thread with surge protector housing 3.Surge protector housing 3 is fixed on the base station equipment (among Fig. 1 shown in the dotted line) by screw 31; the individual cavity 32 of the mutual separation of sealing around laterally being separated into 5 in the surge protector housing 3 of present embodiment; the micro belt board 2 that surge protecting circuit is arranged in cavity 32; these micro belt board 2 usefulness securing members 22 are fixed in the cavity 32; securing member 21 is except being fixed on micro belt board 2 inside and outside the cavity 32; also worked to connect micro belt board 2 ground wires, these surge protector housing 3 tops can be sealed with lid (not drawing among the figure).
The A-A cutaway view of surge protector housing 3 shown in Figure 2, the bottom of this surge protector housing 3 is an overall structure with the sidewall that extends from bottom vertical, this overall structure makes between each cavity intermediate-freuqncy signal has been realized high electromagnetic isolation.
Fig. 3 is the circuit theory diagrams of the surge protector of existing single unit; this circuit is formed by decoupling component (surge resistance R) and voltage limit device serial connection; G slightly protects by gas discharge tube; late-class circuit adopts Transient Suppression Diode TVS and D1 is arranged; D2; D3; the diode array that D4 forms carries out the precision protection; connect by decoupling component (surge resistance R) between gas discharge tube G and the late-class circuit; such circuit can make the voltage limit of surge protector output within the bearing capacity scope of this protector equipment of use; also can release effectively lightning current on the feeder line; the protecting group station equipment is not struck by lightning; but the standing-wave ratio and the insertion loss of the surge protector that the application sort circuit constitutes are bigger, influence the signal transmission.
Circuit theory diagrams of the present utility model as shown in Figure 3; this circuit mainly is made up of gas discharge tube G, surge resistance R, capacitor C 1, capacitor C 2, inductance L and two-way Transient Suppression Diode TVS; form the thick protective circuit of prime by gas discharge tube G and surge resistance R and capacitor C 1, form back level high-pass filtering circuit by capacitor C 2, inductance L and two-way Transient Suppression Diode TVS.Described gas discharge tube G cross-over connection is connected in series capacitor C 1 behind the circuit of described input via surge resistance R and capacitor C 1 parallel connection again between microstrip transmission line input and ground wire, connect the microstrip transmission line output then; Described inductance L cross-over connection is between the tie point and ground wire of capacitor C 1 and capacitor C 2, and described two-way Transient Suppression Diode TVS cross-over connection is between the tie point and ground wire of capacitor C 2 and microstrip transmission line output.
The input of intermediate frequency feedback surge protector connects the intermediate frequency feeder line by radio frequency connector 4, and the output of this surge protector links to each other by the base station equipment of radio frequency connector 1 with protected TD-SCDMA system, and surge protector housing 3 passes through screw 31 ground connection.Its course of work is as follows: signal enters micro belt board 2 by radio frequency connector 4, to radio frequency connector 1 output.Prime adopts gas discharge tube G slightly to protect in the surge protecting circuit, when having the surge surge to flow into, and the lot of energy of releasing; The back level adopts high-pass filtering circuit, and minimum in the passband internal power decay of 6-200MHz, intermediate-freuqncy signal, calibrating signal can both be passed through.It is infinitely great that stopband internal power decay is tending towards, and the lightning wave Energy distribution more than 90% is below KHz more than 10, and surge current can not pass through.The voltage limit that makes its protector output is within the bearing capacity scope of base station equipment.Connect by surge resistance R (decoupling component) between the two-stage in the circuit.
In addition to the implementation, the utility model can also have other execution modes, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection range of the utility model requirement.
Claims (3)
1. an intermediate frequency feedback surge protector comprises surge protector housing (3), input radio frequency connector (4), output radio frequency connector (1), micro belt board (2); It is characterized in that, (4) at least 2 of described input radio frequency connectors, each radio frequency connector (4) stretches in the surge protector housing (3), its inner wire (41) is welded on the input (23) of micro belt board (2), and outer conductor (42) is connected by the side of screw thread with surge protector housing (3); (1) at least 2 of described output radio frequency connector, each radio frequency connector (1) stretches in the surge protector housing (3), its inner wire (11) is welded on the output (21) of micro belt board (2), and outer conductor (12) is connected by the opposite side of screw thread with surge protector housing (3); Described surge protector housing (3) is fixed on the base station equipment by screw (31); The individual cavity (32) of the mutual separation of sealing around laterally being separated at least 2 in the described surge protector housing (3); be equipped with identical surge protection micro belt board (2) in described each individual cavity (32), described micro belt board (2) is fixed in the cavity (32) with securing member (22).
2. intermediate frequency feedback surge protector according to claim 1 is characterized in that, the container-like metal shell that described surge protector housing (3) can close with cap seal for the top, and its bottom is an overall structure with the sidewall that extends from bottom vertical.
3. intermediate frequency feedback surge protector according to claim 1, it is characterized in that, the circuit of described micro belt board (2) mainly is made up of gas discharge tube (G), surge resistance (R), electric capacity (C1), electric capacity (C2), inductance (L) and two-way Transient Suppression Diode (TVS), form the thick protective circuit of prime by gas discharge tube (G) and surge resistance (R) and electric capacity (C1), form back level high-pass filtering circuit by electric capacity (C2), inductance (L) and two-way Transient Suppression Diode (TVS); Described gas discharge tube (G) cross-over connection is between microstrip transmission line input (23) and ground wire, and described input (23) is connected in series electric capacity (C1) after via surge resistance (R) and electric capacity (C1) circuit in parallel again, connects microstrip transmission line output (21) then; Described inductance (L) cross-over connection is between the tie point and ground wire of electric capacity (C1) and electric capacity (C2), and described two-way Transient Suppression Diode (TVS) cross-over connection is between the tie point and ground wire of electric capacity (C2) and microstrip transmission line output (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200380650U CN201061135Y (en) | 2007-05-29 | 2007-05-29 | Intermediate frequency feeder line surge protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200380650U CN201061135Y (en) | 2007-05-29 | 2007-05-29 | Intermediate frequency feeder line surge protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201061135Y true CN201061135Y (en) | 2008-05-14 |
Family
ID=39409625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200380650U Expired - Lifetime CN201061135Y (en) | 2007-05-29 | 2007-05-29 | Intermediate frequency feeder line surge protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201061135Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111564932A (en) * | 2020-06-18 | 2020-08-21 | 中国石化销售有限公司华南分公司 | Electric actuator who strikes surge is prevented to lightning |
| WO2022041050A1 (en) * | 2020-08-26 | 2022-03-03 | 南京云天致信信息科技有限公司 | Power surge protection circuit for internet of things mobile base station, and protection method |
-
2007
- 2007-05-29 CN CNU2007200380650U patent/CN201061135Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111564932A (en) * | 2020-06-18 | 2020-08-21 | 中国石化销售有限公司华南分公司 | Electric actuator who strikes surge is prevented to lightning |
| WO2022041050A1 (en) * | 2020-08-26 | 2022-03-03 | 南京云天致信信息科技有限公司 | Power surge protection circuit for internet of things mobile base station, and protection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20070529 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |