CN205693666U - A kind of electromagnetic compatibility equipment - Google Patents
A kind of electromagnetic compatibility equipment Download PDFInfo
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- CN205693666U CN205693666U CN201620614797.9U CN201620614797U CN205693666U CN 205693666 U CN205693666 U CN 205693666U CN 201620614797 U CN201620614797 U CN 201620614797U CN 205693666 U CN205693666 U CN 205693666U
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- radio station
- circuit
- electromagnetic compatibility
- described radio
- printed board
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Abstract
The utility model discloses a kind of electromagnetic compatibility equipment, it includes external shielding devices, for casing and the cable in described radio station are carried out electromagnetic shielding；Internal noise trap, including power-supply filter, the anti-interference mechanism of ground connection, circuit radioprotective mechanism and printed board shielding body, described power-supply filter is connected to the secondary power supply outfan in described radio station, for suppressing the interference signal in described radio station；The anti-interference mechanism of described ground connection includes that the earth bus being connected with ground, described earth bus are connected with the inner ground port in described radio station；Circuit radioprotective mechanism is for preventing the channel radiation in described radio station；Described printed board shielding body is for carrying out electromagnetic interference shield to the printed board in described radio station.This utility model guarantees that ultrashort wave radio set possesses preferable Electromagnetic Compatibility, improves radio communication system data transmission error rates and speech communication intelligibility performance indications requirement.
Description
Technical field
This utility model relates to the ultrashort wave radio set technical field of wireless communication system, particularly relates to a kind of ultrashort wave radio set
Electromagnetic compatibility equipment.
Background technology
At wireless communication field, communication equipment becomes increasingly complex, high-tech content get more and more, function from strength to strength,
Therefore the Electro Magnetic Compatibility of Wireless Telecom Equipment is had higher requirement.At present, the ultrashort wave radio set of wireless communication system
Power supply system is more complicated, comprises AC 220V 50Hz and the D/C power of different size；The kind of signal is the most, have simulation,
The signals such as numeral and communication, and semaphore is bigger；Electric connecting relation between each module (board) is tight, installs intensive,
The electromagnetic environment of intermodule is more complicated, easily forms interfering of module.
Existing ultrashort wave radio set is installed in rack, and the ground magnetic environment between combination is more complicated, is easily formed between combination
Interfere.In the wild in actual combat environment, ultrashort wave radio set still suffers from the electromagnetism that whole armament systems miscellaneous equipment causes
Interference, such as power supply Conduction coupling and electromagnetic radiation coupling etc..The above analysis, the electromagnetic environment of ultrashort wave radio set is complicated,
It is highly prone to electromagnetic interference.How to reduce intermodule electromagnetic interference each other, make ultrashort wave radio set run well, be one
Problem demanding prompt solution.
Utility model content
This utility model mainly solves the technical problem in the presence of prior art, thus provides a kind of electromagnetic compatibility energy
The electromagnetic compatibility equipment of the ultrashort wave radio set that power is strong.
Above-mentioned technical problem of the present utility model is mainly addressed by following technical proposals:
The electromagnetic compatibility equipment of the ultrashort wave radio set that this utility model provides, comprising:
External shielding devices, for carrying out electromagnetic shielding to casing and the cable in described radio station；
Internal noise trap, including power-supply filter, the anti-interference mechanism of ground connection, circuit radioprotective mechanism and printed board screen
Covering mechanism, described power-supply filter is connected to the secondary power supply outfan in described radio station, for the interference signal to described radio station
Suppress；The anti-interference mechanism of described ground connection includes the earth bus being connected with ground, described earth bus and described radio station
Inner ground port be connected；Circuit radioprotective mechanism is for preventing the channel radiation in described radio station；Described printed board shields
Mechanism is for carrying out electromagnetic interference shield to the printed board in described radio station.
Further, described external shielding devices includes that conductive adhesive tape and copper-foil conducting electricity, described conductive adhesive tape are sealed in institute
Stating at the assembling gap of casing, described copper-foil conducting electricity is arranged on the vent window of described casing.
Further, described external shielding devices also includes the twisted-pair shielded wire constituting the heart yearn of described cable, described double
The two-terminal-grounding of strand shielding line.
Further, input line and the output lead interval of described power-supply filter connects up.
Further, described circuit radioprotective mechanism includes differential interface or light-coupled isolation interface, optocoupler, described difference
Tap mouth or light-coupled isolation interface are connected with the digital circuit in described radio station, described optocoupler and the ground loop in described radio station
Road is connected.
Further, described printed board shielding body includes multilager base plate, clock circuit and I/O circuit, described multilamellar base
Bus plane next-door neighbour's ground plane of plate, described clock circuit adjoins described stratum, and is positioned at the center position on described stratum, described
I/O circuit uses the data wire with filter function.
The beneficial effects of the utility model are: by external shielding devices, casing and the cable in radio station are carried out electromagnetic screen
Covering, internal noise trap carries out anti-interference shielding to power supply, circuit, ground connection and the printed board etc. in radio station, and it guarantees ultrashort wave
Radio station possesses preferable Electromagnetic Compatibility, improves radio communication system data transmission error rates and speech communication intelligibility
Can index request.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, the accompanying drawing in describing below is only
It is embodiments more of the present utility model, for those of ordinary skill in the art, in the premise not paying creative work
Under, it is also possible to other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the structural representation of electromagnetic compatibility equipment of the present utility model；
Fig. 2 is the block diagram of the circuit radioprotective mechanism of electromagnetic compatibility equipment of the present utility model；
Fig. 3 is the block diagram of the printed board shielding body of electromagnetic compatibility equipment of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings preferred embodiment of the present utility model is described in detail, so that advantage of the present utility model
Can be easier to be readily appreciated by one skilled in the art with feature, thus protection domain of the present utility model is made apparent clearly
Define.
Refering to shown in Fig. 1, electromagnetic compatibility equipment of the present utility model, comprising:
External shielding devices 1, for carrying out electromagnetic shielding to casing 21 and the cable 22 in radio station 2；
Internal noise trap 3, including power-supply filter 4, the anti-interference mechanism of ground connection 5, circuit radioprotective mechanism 6 with print
Plate shielding body 7, power-supply filter 4 is connected to secondary power supply 23 outfan in radio station 2, for entering the interference signal in radio station 2
Row suppression；The anti-interference mechanism of ground connection 5 includes the earth bus 51 being connected with ground, and earth bus 51 connects with the inside in radio station 2
Ground port 24 is connected；Circuit radioprotective mechanism 6 is for preventing the channel radiation in radio station 2；Printed board shielding body 7 is for electricity
The printed board of platform 2 carries out electromagnetic interference shield.
Specifically, external shielding devices 1 includes conductive adhesive tape 11 and copper-foil conducting electricity 12, and conductive adhesive tape 11 is sealed in casing 21
Assembling gap at, copper-foil conducting electricity 12 is arranged on the vent window of casing 21.Wherein, weight can also be selected in the surface of casing 21
Gently, intensity is high and has the aluminium sheet of high electrical conductivity as screen material.Further, conductive adhesive tape 11 can also be arranged on casing
On the contact surface of the operating parts (on and off switch, keyboard, display lamp, fuse holder, input-output socket) of 21.Thus increase further
Add the shielding intensity of external shielding devices 1.
Specifically, external shielding devices 1 also includes the twisted-pair shielded wire constituting the heart yearn of cable 22, the two of twisted-pair shielded wire
End ground connection.Signal frequency and the cut-off frequency of shielding material that cable 22 in the present embodiment can also transmit according to it are distinguished
Take single-end earthed or two sides earth measure, reduce the electromagnetic interference impact on system to greatest extent, but with external shield
The cable of layer, all takes two sides earth measure.
In this utility model, the specific design process of the anti-interference mechanism of ground connection 5 is as follows:
A), inner ground port 24 (digital signal ground, analogue signal ground, noise ground and the safety of the internal each combination in radio station 2
Ground) all by respective busbar come together in one point union pass through a ground wire be connected with earth bus 51；
B), Switching Power Supply safely, shielding ground and external dc power use concurrent ground mode connect casing 21；
It is also preferred that the left the input line of power-supply filter 4 and the wiring of output lead interval.So can avoid result in power-supply filter
The electromagnetic coupled of 4 input/output terminals, reduces the wave filter rejection ability to EMI signal.It is also preferred that the left the power supply in this utility model
Wave filter 4 is arranged at the earth point of broadcasting station equipment as far as possible, and the earth lead making power-supply filter 4 is the shortest direct with Conduction Interference
Enter ground, improve power-supply filter 4 to interference signal rejection ability, and, it is ensured that the shell of power-supply filter 4 with systematically
Between there is good electrical connection, can be by the shielding of casing 21, between power end and the load end of power-supply filter 4
Electromagnetic coupled controls to bottom line so that it is can play the power-supply filter 4 rejection ability to EMI signal, the most not destroy case
Body 21 shields the control to EMI signal.
Refering to shown in Fig. 2, the circuit radioprotective mechanism 6 in this utility model includes differential interface or light-coupled isolation interface
61, optocoupler 62, differential interface or light-coupled isolation interface 61 are connected with the digital circuit 25 in radio station 2, optocoupler 62 with
The ground loop 26 in radio station 2 is connected.This utility model can also prevent the circuit spoke in radio station 2 further by following manner
Penetrate:
A), analog circuit and the digital circuit in radio station 2 does not share a power supply；
B), the power module input and output side in radio station 2 is the most altogether；
C), the clock pin in radio station 2 lay against its earth-return circuit, reduce ground loop 26 area, and as far as possible away from it
It connects up and shortens and holding wire, data/address bus line length；
D), the driver in radio station 2 against bus arrangement, reduce loop area, and go between the shortest and away from other circuit and
Holding wire；
E), the long holding wire input in radio station 2 passes through capacity earth.
In this utility model, refering to shown in Fig. 3, printed board shielding body 7 includes multilager base plate 71, clock circuit 72 and I/
O circuit 73, bus plane next-door neighbour's ground plane of multilager base plate 71, clock circuit 72 adjoins stratum, and is positioned at the center on stratum
Place, I/O circuit 73 uses the data wire with filter function.Wherein, also by following manner, increase printed board shielding body
The electromagnetic interference shield of 7:
Multilager base plate 71 aspect: the trend of the PCB layout of multilager base plate 71 is rationally arranged: such as input/output, friendship
Stream/direct current, the trend of strong/weak signal, high-frequency/low-frequency, high voltage/low voltage etc. are avoided in linear and annular, reduce way interleave several
Rate.
Clock circuit 72 aspect: 1), clock circuit 72 clock routing the shortest；2), all clocks and high-frequency signal are to the greatest extent
It is possibly disposed in same line layer etc.；
I/O circuit 73 aspect: 1), the input of I/O circuit 73 and output lead all take transformator or optocoupler isolation,
2), the data wire of I/O circuit 73 uses capacitor decoupling to close.
In sum, the utility model has the advantage of: by external shielding devices 1 to the casing 21 in radio station 2 and cable
22 carry out electromagnetic shielding, and internal noise trap 3 carries out anti-interference screen to power supply, circuit, ground connection and the printed board etc. in radio station 2
Covering, it guarantees that ultrashort wave radio set possesses preferable Electromagnetic Compatibility, improve radio communication system data transmission error rates and
Speech communication intelligibility performance indications requirement.
Above, detailed description of the invention the most of the present utility model, but protection domain of the present utility model is not limited thereto,
Any change expected without creative work or replacement, all should contain within protection domain of the present utility model.Therefore,
Protection domain of the present utility model should be as the criterion with the protection domain that claims are limited.
Claims (6)
1. an electromagnetic compatibility equipment, it is characterised in that including:
External shielding devices, for carrying out electromagnetic shielding to casing and the cable in described radio station；
Internal noise trap, including power-supply filter, the anti-interference mechanism of ground connection, circuit radioprotective mechanism and printed board shield machine
Structure, described power-supply filter is connected to the secondary power supply outfan in described radio station, for carrying out the interference signal in described radio station
Suppression；The anti-interference mechanism of described ground connection includes the earth bus being connected with ground, and described earth bus is interior with described radio station
Portion's grounding ports is connected；Circuit radioprotective mechanism is for preventing the channel radiation in described radio station；Described printed board shielding body
For the printed board in described radio station is carried out electromagnetic interference shield.
2. electromagnetic compatibility equipment as claimed in claim 1, it is characterised in that described external shielding devices include conductive adhesive tape and
Copper-foil conducting electricity, described conductive adhesive tape is sealed at the assembling gap of described casing, and described copper-foil conducting electricity is arranged on described casing
On vent window.
3. electromagnetic compatibility equipment as claimed in claim 1 or 2, it is characterised in that described external shielding devices also includes constituting
The twisted-pair shielded wire of the heart yearn of described cable, the two-terminal-grounding of described twisted-pair shielded wire.
4. electromagnetic compatibility equipment as claimed in claim 1, it is characterised in that the input line of described power-supply filter and output lead
Interval wiring.
5. electromagnetic compatibility equipment as claimed in claim 1, it is characterised in that described circuit radioprotective mechanism includes differential interface
Or light-coupled isolation interface, optocoupler, described differential interface or light-coupled isolation interface are connected with the digital circuit in described radio station,
Described optocoupler is connected with the ground loop in described radio station.
6. electromagnetic compatibility equipment as claimed in claim 1, it is characterised in that described printed board shielding body includes multilamellar base
Plate, clock circuit and I/O circuit, bus plane next-door neighbour's ground plane of described multilager base plate, described clock circuit adjoins described stratum,
And it being positioned at the center position on described stratum, described I/O circuit uses the data wire with filter function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620614797.9U CN205693666U (en) | 2016-06-21 | 2016-06-21 | A kind of electromagnetic compatibility equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620614797.9U CN205693666U (en) | 2016-06-21 | 2016-06-21 | A kind of electromagnetic compatibility equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205693666U true CN205693666U (en) | 2016-11-16 |
Family
ID=57416633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620614797.9U Active CN205693666U (en) | 2016-06-21 | 2016-06-21 | A kind of electromagnetic compatibility equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205693666U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106027115A (en) * | 2016-06-21 | 2016-10-12 | 贵州航天天马机电科技有限公司 | Electromagnetic compatibility system of ultra-short wave radio set |
| CN106841699A (en) * | 2017-01-16 | 2017-06-13 | 东南大学 | Paired cable electromagnetic protection performance test lead welding fixture |
-
2016
- 2016-06-21 CN CN201620614797.9U patent/CN205693666U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106027115A (en) * | 2016-06-21 | 2016-10-12 | 贵州航天天马机电科技有限公司 | Electromagnetic compatibility system of ultra-short wave radio set |
| CN106841699A (en) * | 2017-01-16 | 2017-06-13 | 东南大学 | Paired cable electromagnetic protection performance test lead welding fixture |
| CN106841699B (en) * | 2017-01-16 | 2019-06-04 | 东南大学 | Paired cable electromagnetic protection performance test lead welding fixture |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |