CN105162431B - A kind of broadband Surface Mount electromagnetic interface filter for suppression electromagnetic interference - Google Patents
A kind of broadband Surface Mount electromagnetic interface filter for suppression electromagnetic interference Download PDFInfo
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- CN105162431B CN105162431B CN201510558429.7A CN201510558429A CN105162431B CN 105162431 B CN105162431 B CN 105162431B CN 201510558429 A CN201510558429 A CN 201510558429A CN 105162431 B CN105162431 B CN 105162431B
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Abstract
The invention discloses a kind of broadband Surface Mount electromagnetic interface filter for suppression electromagnetic interference, including shell（1）, in addition to：Choke coil（3）, electric capacity（2）And printed circuit board（4）；Wherein shell（1）Both ends are sealed by insulator, printed circuit board（4）It is pasted onto shell（1）The bottom of hollow cavity, choke coil（3）It is welded on printed circuit board（4）Center, electric capacity（2）There are 4, two of which is between shell input and choke coil, and another two is between choke coil and shell output end.Wave filter small volume of the present invention, frequency filtering scope is wide, high-frequency electromagnetic interference suppressioning effect is good, has good application prospect.
Description
Technical field
The present invention relates to a kind of broadband Surface Mount electromagnetic interface filter, particularly a kind of broadband for suppression electromagnetic interference
Surface Mount electromagnetic interface filter.
Background technology
Electromagnetic interface filter is the product of electromagnetic compatibility development, is to solve electromagnetic interference, realize that electromagnetic compatibility first choice must use device
Part.Tieed up in " land, sea, air, day, magnetic " five on integrated battlefield, will all use substantial amounts of electronics, battlefield electromagnetism between ourselves and the enemy
Environment will be sufficiently complex, and electromagnetic compatibility problem will be protruded increasingly.Electromagnetic compatibility refers under same Battle Field Electromagnetic, respectively
Kind of main battle weaponry is able to carry out respective fight function, each equipment and each subsystem can normal work, not by other equipments
Interference, does not disturb other equipments yet.If the combat system-of-systems of oneself have the problem of electromagnetism is incompatible, will be out of action.
Electromagnetic interface filter can not be substituted in the application for solving electromagnetic interference, raising antijamming capability field.
Clock circuit, high-frequency circuit（Microwave circuit）Etc. being main radiation interference source, during the work such as crystal oscillator, switching device
Caused clutter, harmonic wave can cause have stronger high frequency radiation electromagnetic interference on power supply, and it is to ensure complete machine to design such circuit
Reach the key of radiation index.
Electromagnetic interface filter part is mainly the passive port network being made up of components such as inductance, electric capacity.Inductance can be with magnetic core
The diversified forms such as coiling form, air core inductor form, printed circuit form exist, same electric capacity can also with discrete capacitor,
The diversified forms such as printed circuit are present.Traditional electromagnetic interface filter is influenceed by device, circuit structure, distributed constant, and volume is inclined
Greatly, filter range is narrow, high frequency characteristics is poor.
The content of the invention
Present invention aims at a kind of broadband Surface Mount electromagnetic interface filter for suppression electromagnetic interference is provided, solve existing
The problem of small product size in technology is big, frequency filtering narrow range, high frequency characteristics difference.
A kind of broadband Surface Mount electromagnetic interface filter for suppression electromagnetic interference, including shell, in addition to：Choke coil, electric capacity
And printed circuit board.
The shell is hollow rectangular tubular housing, two openends insulation with pin by sintering respectively of shell
Son sealing, it is input to define wherein one end, and the other end is output end；The printed circuit board is that surface is printed with circuit
FR-4 double-sided metal thin plates, printed circuit board are pasted onto the bottom of shell hollow cavity, and with the input pin of shell and defeated
Go out to hold pin to connect；The choke coil is the magnet ring structure of enamel-covered wire coiling, and the center of printed circuit board is welded on by lead
Position；The electric capacity is the X2Y capacitors that electrode is combined in " X " electric capacity and " Y " electric capacity, is shaped as rectangle and shares 4, point
Do not numbered is that C1, C2, C3 and C4, wherein electric capacity C1 and electric capacity C2 weld input and chokes on a printed circuit board
Between circle, and it is connected respectively with input and choke coil by printed circuit, wherein electric capacity C1 and electric capacity C2 are in parallel；Electric capacity C3 and
Electric capacity C4 is welded on a printed circuit board between output end and choke coil, and by printed circuit respectively with choke coil and output
End connection, wherein electric capacity C3 and electric capacity C4 are in parallel.
Full range segment signal enters printed circuit board by shell input pin, by electric capacity C1 and electric capacity C2 bypass,
Reflection and isolation, are tentatively suppressed to the interference signal in full range segment signal；Then reflection, absorption and the screen of choke coil are passed through
Isolation is covered, to the further suppression of interference signal；Then pass through electric capacity C3 and electric capacity C4 bypass, reflection and isolation, interference is believed
Number last suppression is carried out, exported finally by shell output pin.
Irregular design of this technology shell inside cavity according to the profile of component using solid, expands inner space,
Ensure structural strength.The X2Y capacitors that electric capacity is combined using " X " electric capacity and " Y " electric capacity, reduce volume.Choke coil passes through whirlpool
Stream loss suppression electromagnetic interference, parasitic capacitance is carried out to offset the influence for reducing distributed constant to high frequency performance.Printed board uses
Low ESR grounding technology, it is embodied in large area ground connection and multipoint earthing；Using the isolation technology of high impedance, ground wire is embodied in letter
Number transmission line separates, and passes through and transmission is connected after capacitor filtering, improves high frequency performance.By the structure design, volume is realized
It is small, frequency filtering scope is wide, high-frequency electromagnetic interference suppressioning effect is good.
Brief description of the drawings
A kind of structure chart of broadband Surface Mount electromagnetic interface filters for suppression electromagnetic interference of Fig. 1；
A kind of printed circuit board circuit diagram of broadband Surface Mount electromagnetic interface filters for suppression electromagnetic interference of Fig. 2.
1. the printed circuit board of 2. electric capacity of shell, 3. choke coil 4..
Embodiment
A kind of broadband Surface Mount electromagnetic interface filter for suppression electromagnetic interference, including shell 1, it is characterised in that also include：
Choke coil 3, electric capacity 2 and printed circuit board 4.
The shell 1 is hollow rectangular tubular housing, and two openends of shell are respectively by sintering with the exhausted of pin
Edge seals, and it is input to define wherein one end, and the other end is output end；The printed circuit board 4 is that surface is printed with circuit
FR-4 double-sided metal thin plates, printed circuit board 4 is pasted onto the bottom of the hollow cavity of shell 1, and with the input pin of shell 1
Connected with output pin；The choke coil 3 is the magnet ring structure of enamel-covered wire coiling, and printed circuit board 4 is welded on by lead
Center；The electric capacity 2 is the X2Y capacitors that electrode is combined in " X " electric capacity and " Y " electric capacity, is shaped as rectangle and is total to
There are 4, numbered that to be that C1, C2, C3 and C4, wherein electric capacity C1 and electric capacity C2 are welded on defeated on printed circuit board 4 respectively
Enter between end and choke coil, and be connected respectively with input and choke coil 3 by printed circuit, wherein electric capacity C1 and electric capacity C2 are simultaneously
Connection；Electric capacity C3 and electric capacity C4 are welded on printed circuit board 4 between output end and choke coil, and by printed circuit respectively with
Choke coil 3 connects with output end, and wherein electric capacity C3 and electric capacity C4 are in parallel.
Full range segment signal enters printed circuit board 4 by the input pin of shell 1, by electric capacity C1 and electric capacity C2 side
Road, reflection and isolation, the interference signal in full range segment signal is tentatively suppressed；Then by the reflection of choke coil 3, absorption
Isolate with shielding, to the further suppression of interference signal；Then electric capacity C3 and electric capacity C4 bypass, reflection and isolation is passed through, to dry
Disturb signal and carry out last suppression, exported finally by the output pin of shell 1.
Claims (1)
1. a kind of broadband Surface Mount electromagnetic interface filter for suppression electromagnetic interference, including shell（1）, it is characterised in that also include：
Choke coil（3）, electric capacity（2）And printed circuit board（4）；
The shell（1）For hollow rectangular tubular housing, two openends insulation with pin by sintering respectively of shell
Son sealing, it is input to define wherein one end, and the other end is output end；The printed circuit board（4）Circuit is printed with for surface
FR-4 double-sided metal thin plates, printed circuit board（4）It is pasted onto shell（1）The bottom of hollow cavity, and and shell（1）Input
End pin connects with output pin；The choke coil（3）For the magnet ring structure of enamel-covered wire coiling, printing is welded on by lead
Circuit board（4）Center；The electric capacity（2）The X2Y capacitors being combined for electrode in " X " electric capacity and " Y " electric capacity, shape
Shape is rectangle and shares 4, and it is that C1, C2, C3 and C4, wherein electric capacity C1 and electric capacity C2 are welded on printing electricity to be numbered respectively
Road plate（4）On input and choke coil between, and by printed circuit respectively with shell input and choke coil（3）Connection,
Wherein electric capacity C1 and electric capacity C2 is in parallel；Electric capacity C3 and electric capacity C4 are welded on printed circuit board（4）On output end and choke coil
Between, and by printed circuit respectively with choke coil（3）Connected with shell output end, wherein electric capacity C3 and electric capacity C4 are in parallel；
Full range segment signal passes through shell（1）Input pin enters printed circuit board（4）, by electric capacity C1 and electric capacity C2 side
Road, reflection and isolation, the interference signal in full range segment signal is tentatively suppressed；Then choke coil is passed through（3）Reflection, inhale
Receive and shielding is isolated, to the further suppression of interference signal；Then electric capacity C3 and electric capacity C4 bypass, reflection and isolation is passed through, it is right
Interference signal carries out last suppression, finally by shell（1）Output pin exports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510558429.7A CN105162431B (en) | 2015-09-06 | 2015-09-06 | A kind of broadband Surface Mount electromagnetic interface filter for suppression electromagnetic interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510558429.7A CN105162431B (en) | 2015-09-06 | 2015-09-06 | A kind of broadband Surface Mount electromagnetic interface filter for suppression electromagnetic interference |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105162431A CN105162431A (en) | 2015-12-16 |
| CN105162431B true CN105162431B (en) | 2017-12-29 |
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| CN201510558429.7A Active CN105162431B (en) | 2015-09-06 | 2015-09-06 | A kind of broadband Surface Mount electromagnetic interface filter for suppression electromagnetic interference |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106028774B (en) * | 2016-07-14 | 2019-01-04 | 贵州航天计量测试技术研究所 | A kind of small-sized electromagnetic interface filter device inhibiting spike noise |
| CN107708398A (en) * | 2017-10-12 | 2018-02-16 | 四川中光防雷科技股份有限公司 | A kind of high reliability EMI filtration modules |
| CN108155888A (en) * | 2018-01-05 | 2018-06-12 | 北京航天微电科技有限公司 | A kind of LTCC heavy EMI filters for powered electromagnetic to be inhibited to interfere |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08162883A (en) * | 1994-12-02 | 1996-06-21 | Pfu Ltd | Emi filter |
| CN2561159Y (en) * | 2001-08-09 | 2003-07-16 | 神达电脑股份有限公司 | Electromagnetic interference wave filter for power source supplier |
| CN201682426U (en) * | 2010-05-24 | 2010-12-22 | 合肥恒磊电子科技有限公司 | AC/DC conversion device with low harmonic wave and high accuracy |
| CN103208914A (en) * | 2013-03-18 | 2013-07-17 | 南京航空航天大学 | Planar EMI (electromagnetic interference) filter for high-power application |
-
2015
- 2015-09-06 CN CN201510558429.7A patent/CN105162431B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08162883A (en) * | 1994-12-02 | 1996-06-21 | Pfu Ltd | Emi filter |
| CN2561159Y (en) * | 2001-08-09 | 2003-07-16 | 神达电脑股份有限公司 | Electromagnetic interference wave filter for power source supplier |
| CN201682426U (en) * | 2010-05-24 | 2010-12-22 | 合肥恒磊电子科技有限公司 | AC/DC conversion device with low harmonic wave and high accuracy |
| CN103208914A (en) * | 2013-03-18 | 2013-07-17 | 南京航空航天大学 | Planar EMI (electromagnetic interference) filter for high-power application |
Non-Patent Citations (1)
| Title |
|---|
| X2Y一种新型的EMI滤波器;区健昌;《电气技术》;20041031;第1-13页 * |
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| CN105162431A (en) | 2015-12-16 |
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Address after: 100854 Beijing Haidian District Beijing 142 mail box 85 boxes Patentee after: Beijing Aerospace Micro Electric Technology Co., Ltd. Address before: 100854 Beijing Haidian District Beijing 142 mail box 85 boxes Patentee before: Beijing Changfeng Micro-Electronics Technology Co., Ltd. |