CN207926560U - A kind of RJ45 interfaces anti-jamming circuit - Google Patents
A kind of RJ45 interfaces anti-jamming circuit Download PDFInfo
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- CN207926560U CN207926560U CN201820203636.XU CN201820203636U CN207926560U CN 207926560 U CN207926560 U CN 207926560U CN 201820203636 U CN201820203636 U CN 201820203636U CN 207926560 U CN207926560 U CN 207926560U
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- interfaces
- filter circuit
- feet
- branch
- common mode
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Abstract
The utility model discloses a kind of RJ45 interfaces anti-jamming circuits, including the first RJ45 interfaces and the 2nd RJ45 interfaces, the first RJ45 interfaces are connected with the 2nd RJ45 Interface Matchings, it is connected with the first filter circuit between the data transmission foot and the data transmission foot of the 2nd RJ45 interfaces of the first RJ45 interfaces, the second filter circuit is respectively connected between the data receiver foot and the data receiver foot of the 2nd RJ45 interfaces of the first RJ45 interfaces.The disturbing pulse brought to tested wireless telecommunications system that the RJ45 interfaces on shielded box are filtered out by the first filter circuit and the second filter circuit, realizes the electromagnetic shielding to RJ45 interfaces.
Description
Technical field
The utility model is related to wireless signal processing technology field more particularly to a kind of RJ45 interfaces anti-jamming circuits.
Background technology
The various interfaces for the network equipment that network interface refers to, network interface currently in use all connects for Ethernet now for we
Mouthful.Common Ethernet interface type has RJ45 interfaces, and RJ45 interface RJ45 interfaces are common Ethernet interfaces, supports 10,000,000
With 100,000,000 adaptive network connection speeds, the appearance of interface is 8 core mother sockets, including a pair of of data on network interface card and on Hub
Receive pin (+, -), a pair of of data transmission pin (+, -) and 4 empty feet.
Electromagnetic shielding box is to utilize the variously-shaped shield such as shell, plate, set made of conductive or permeability magnetic material, will be electric
Magnetic energy power limit within the scope of certain space for inhibiting the metallic object of radiation interference, and to conducting and radiation is handled with reality
The equipment for now giving tested wireless telecommunications system to provide glitch-free test environment.In test, wireless telecommunications system need to be inputted
Test signal, therefore various converting interfaces are set in the babinet body wall of shielded box, common interface type has USB interface, network to connect
Mouth, HDMI interface etc..Because of the special applications of electromagnetic shielding box, need to realize electromagnetic shielding to these interfaces.In the prior art
Lack a kind of circuit applied to shielded box network interface electromagnetism interference.
Utility model content
In order to solve the above-mentioned technical problem, the purpose of this utility model is to provide a kind of anti-applied to shielded box RJ45 interfaces
Interfere circuit.
Technical solution used by the utility model is：A kind of RJ45 interfaces anti-jamming circuit, including the first RJ45 interfaces
With the 2nd RJ45 interfaces, the first RJ45 interfaces are connected with the 2nd RJ45 Interface Matchings, the first RJ45 interfaces
The first filter circuit is connected between data transmission foot and the data transmission foot of the 2nd RJ45 interfaces, the first RJ45 connects
It is respectively connected with the second filter circuit between the data receiver foot and the data receiver foot of the 2nd RJ45 interfaces of mouth.
Further, further include third filter circuit, 4 feet and 5 feet of the first RJ45 interfaces pass through third filtered electrical
Road is connect with 4 feet of the 2nd RJ45 interfaces and 5 feet.
Further, further include the 4th filter circuit, 7 feet and 8 feet of the first RJ45 interfaces pass through the 4th filtered electrical
Road is connect with 7 feet of the 2nd RJ45 interfaces and 8 feet.
Further, first filter circuit, the second filter circuit, third filter circuit and the 4th filter circuit wrap
The first common mode inductance and the second common mode inductance are included, the first winding of first common mode inductance and the first of the second common mode is around string formation
The connection composition first branch, the second winding of first common mode inductance and the second windings in series of the second common mode form second
Road is parallel with several capacitances, several capacitances is parallel between the second branch and ground between the first branch and ground.
Further, it is parallel with feedthrough capacitor between the first branch and ground, is parallel between the second branch and ground
Feedthrough capacitor.
Further, it is connected with capacitance between the first branch and the second branch.
The utility model has the beneficial effects that：The utility model connects the first RJ45 interfaces by the way that the first filter circuit is arranged
Data transmission foot and the 2nd RJ45 interfaces data transmission foot, setting the second filter circuit connect the first RJ45 interfaces data
Receive the data receiver foot of foot and the 2nd RJ45 interfaces.It is filtered out on shielded box by the first filter circuit and the second filter circuit
The disturbing pulse of RJ45 interfaces brought to tested wireless telecommunications system, realizes the electromagnetic shielding to RJ45 interfaces.
Description of the drawings
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings：
Fig. 1 is the circuit diagram in one specific embodiment of the utility model.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
A kind of RJ45 interfaces anti-jamming circuit, including the first RJ45 interfaces and the 2nd RJ45 interfaces, the first RJ45 connect
It mouthful is connected with the 2nd RJ45 Interface Matchings, the data transmission feet of the first RJ45 interfaces and the 2nd RJ45 interfaces
The first filter circuit is connected between data transmission foot, the data receiver foot and the 2nd RJ45 of the first RJ45 interfaces connect
It is respectively connected with the second filter circuit between the data receiver foot of mouth.
It is further used as preferred embodiment, further includes third filter circuit and the 4th filter circuit, described first
4 feet and 5 feet of RJ45 interfaces are connect by third filter circuit with 4 feet of the 2nd RJ45 interfaces and 5 feet.Described first
7 feet and 8 feet of RJ45 interfaces are connect by the 4th filter circuit with 7 feet of the 2nd RJ45 interfaces and 8 feet.
Be further used as preferred embodiment, first filter circuit, the second filter circuit, third filter circuit with
And the 4th filter circuit include the first common mode inductance and the second common mode inductance, the first winding of first common mode inductance and the
First windings in series of two common modes forms the first branch, the second winding of first common mode inductance and the second of the second common mode around
Group is composed in series the second branch, several capacitances is parallel between the first branch and ground, between the second branch and ground simultaneously
It is associated with several capacitances.Common mode inductance has the function of EMI filtering, the electromagnetic wave outside radiation for inhibiting HW High Way to generate
Transmitting.
Preferably, it is parallel with feedthrough capacitor between the first branch and ground, is parallel between the second branch and ground
Feedthrough capacitor is connected with capacitance between the first branch and the second branch.Punching capacitance self-inductance is compared with conventional capacitive
It is much smaller, so self-resonant frequency is very high.Meanwhile punching designs, and it is direct from input terminal also to effectively prevent high-frequency signal
It is coupled to output end.The combination of this low pass high resistant provides fabulous inhibition in 1GHz frequency ranges.
As shown in Figure 1, it illustrates a kind of circuit diagrams of RJ45 interfaces anti-jamming circuit comprising the first RJ45 connects
Mouth JA1, the 2nd RJ45 interfaces JA2, the first filter circuit, the second filter circuit, third filter circuit and the 4th filter circuit,
First RJ45 interfaces JA1 and the 2nd RJ45 interfaces JA2 is female seat.
First filter circuit includes the first common mode inductance LA1, the second common mode inductance LA2, the first electricity CA1 appearances, second
Capacitance CA2, the 11st capacitance CA11 of third capacitance CA3 ..., wherein the second capacitance CA2, third capacitance CA3, the 5th capacitance
CA5, the 6th capacitance CA6, the tenth capacitance CA10 and the 11st capacitance CA11 are feedthrough capacitor, the first RJ45 interfaces JA1
TX+ feet connect with 1 foot of the first common mode inductance LA1,2 feet of the first common mode inductance LA1 pass sequentially through the second capacitance CA2,
Five capacitance CA5 are connect with 1 foot of the second common mode inductance LA2, and 2 feet of the second common mode inductance pass through the tenth capacitance CA10 and
The TX+ connections of two RJ45 interfaces JA1.The TX- feet of the first RJ45 interfaces JA1 are connect with 3 feet of the first common mode inductance LA1,
4 feet of first common mode inductance LA1 pass sequentially through 3 feet of third capacitance CA3, the 6th capacitance CA6 and the second common mode inductance LA2
Connection, 4 feet of the second common mode inductance are connect by the 11st capacitance CA11 with the TX+ of the 2nd RJ45 interfaces JA1.First capacitance
The both ends of CA1 are separately connected 1 foot and 2 feet of the first common mode inductance LA1, the both ends of the 4th the capacitance CA4 and the 9th capacitance CA9
It is separately connected 3 feet and 4 feet of the first common mode inductance LA1.It is tested by test of many times, using the above filter circuit, in shielded box
The disturbing pulse of the RJ45 interfaces on shielded box brought to tested wireless telecommunications system can be effectively filtered out in actual use,
Realize the electromagnetic shielding to RJ45 interfaces.
It is to be illustrated to the preferable implementation of the utility model, but the invention is not limited to the reality above
Example is applied, those skilled in the art can also make various equivalent changes without departing from the spirit of the present invention
Shape or replacement, these equivalent deformations or replacement are all contained in the application claim limited range.
Claims (6)
1. a kind of RJ45 interfaces anti-jamming circuit, including the first RJ45 interfaces and the 2nd RJ45 interfaces, the first RJ45 interfaces
It is connected with the 2nd RJ45 Interface Matchings, it is characterised in that：The data transmission foot and described second of the first RJ45 interfaces
It is connected with the first filter circuit between the data transmission foot of RJ45 interfaces, the data receiver foot of the first RJ45 interfaces and described
It is respectively connected with the second filter circuit between the data receiver foot of 2nd RJ45 interfaces.
2. RJ45 interfaces anti-jamming circuit according to claim 1, it is characterised in that：It further includes third filter circuit,
4 feet and 5 feet of the first RJ45 interfaces are connect by third filter circuit with 4 feet of the 2nd RJ45 interfaces and 5 feet.
3. RJ45 interfaces anti-jamming circuit according to claim 1, it is characterised in that：It further includes the 4th filter circuit,
7 feet and 8 feet of the first RJ45 interfaces are connect by the 4th filter circuit with 7 feet of the 2nd RJ45 interfaces and 8 feet.
4. RJ45 interfaces anti-jamming circuit according to claim 3, it is characterised in that：First filter circuit, second
Filter circuit, third filter circuit and the 4th filter circuit include the first common mode inductance and the second common mode inductance, and described the
First windings in series of the first winding of one common mode inductance and the second common mode forms the first branch, and the of first common mode inductance
Second windings in series of two windings and the second common mode forms the second branch, and several electricity are parallel between the first branch and ground
Hold, several capacitances are parallel between the second branch and ground.
5. RJ45 interfaces anti-jamming circuit according to claim 4, it is characterised in that：Between the first branch and ground simultaneously
It is associated with feedthrough capacitor, feedthrough capacitor is parallel between the second branch and ground.
6. RJ45 interfaces anti-jamming circuit according to claim 5, it is characterised in that：The first branch and described second
Capacitance is connected between branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820203636.XU CN207926560U (en) | 2018-02-05 | 2018-02-05 | A kind of RJ45 interfaces anti-jamming circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820203636.XU CN207926560U (en) | 2018-02-05 | 2018-02-05 | A kind of RJ45 interfaces anti-jamming circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207926560U true CN207926560U (en) | 2018-09-28 |
Family
ID=63603444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820203636.XU Expired - Fee Related CN207926560U (en) | 2018-02-05 | 2018-02-05 | A kind of RJ45 interfaces anti-jamming circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207926560U (en) |
-
2018
- 2018-02-05 CN CN201820203636.XU patent/CN207926560U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180928 Termination date: 20210205 |
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| CF01 | Termination of patent right due to non-payment of annual fee |