CN110351997A - A kind of novel high shielding ventilation waveguide window construction - Google Patents
A kind of novel high shielding ventilation waveguide window construction Download PDFInfo
- Publication number
- CN110351997A CN110351997A CN201910607543.2A CN201910607543A CN110351997A CN 110351997 A CN110351997 A CN 110351997A CN 201910607543 A CN201910607543 A CN 201910607543A CN 110351997 A CN110351997 A CN 110351997A
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- China
- Prior art keywords
- waveguide
- novel high
- window construction
- high shielding
- cavity
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
- H05K9/0041—Ventilation panels having provisions for screening
Abstract
The invention discloses a kind of novel high shielding ventilation waveguide window construction, the microwave absorbing coating including multiple waveguide cavities, the metal parts being arranged in inside each waveguide cavity and each waveguide cavity cavity wall that is laid in；The waveguide cavity is set as the rectangular strip structure being made of four side walls, and one end is signal input part, and the other end is signal output end.Novel high shielding ventilation waveguide window construction of the invention can increase waveguide transmission loss and improve shield effectiveness, and the cutoff frequency of structure will not be changed substantially, have the characteristics that the processing is simple, easy to assembly, customizable, shield effectiveness is improved in the case where not influencing radiating efficiency.
Description
Technical field
The invention belongs to electromangnetic spectrum fields in electromagnetic compatibility, and in particular to a kind of novel high shielding ventilation waveguide window
Structure.
Background technique
With the continuous development of microelectronics and information technology, the equipment such as each electron-like, electrical, communication have obtained answering extensively
With, enrich people life while produce again much harmful electromagnetic radiation pollutions.Electromagnetic pollution meeting harmful to human
Normal physiological mechanism damages some organ dysfunctions of human body；Electromagnetic radiation may cause the malfunction of electronic equipment, interfere various
The normal work of communication equipment or control system etc., especially for precision instrument or electronic system, intelligent equipment, instrument etc.
The negative effect of generation；In addition, some can also can be mingled with one for the electromagnetic exposure that generates during the work time of electronic information equipment
A little important informations can bring huge hidden danger to information security.Therefore, how to make electronic equipment in the electromagnetic environment of required standard
Operating, how preferably to inhibit electromagnetic interference is the important research content of field of electromagnetic compatibility.
Exposed electronic equipment will receive extraneous electromagnetic interference, therefore electronic equipment outer layer usually can all install screen
Cabinet is covered to protect internal electronic equipment, prevents the normal work of electromagnetic interference influence built-in system.And due to electronic equipment
Heat can be generated at work, the cabinet being completely closed will affect the heat dissipation of equipment, meanwhile, the interconnection between equipment needs to connect
Channel, therefore require to increase slit above cabinet.Due to the presence of heat release hole, the electromagnet shield effect of cabinet can be made to reduce,
In the case where any electromagnetic protection structure is not added, direct aperture is unable to satisfy the requirement of information security and electromagnetic shielding.Therefore exist
When the slit design of carry out system, the problem of needs in view of electromagnetic radiation and electromagnetic shielding.
Waveguide is used to the structure of directional guide electromagnetic wave, is the device that guide electromagnetic waves are propagated in a certain direction, is drawn
The electromagnetic wave led becomes guided wave.It allows the signal of cutoff frequency or more to pass through, and cutoff frequency signal below is then hindered
Only or decay.It can be designed that according to the frequency of electromagnetic interference signal based on the novel ventilated of wave guide principles using this characteristic
Window construction makes electromagnetic interference signal frequency in the cut-off region of waveguide, so that electromagnetic interference signal is generated very big decaying, to reach
To the effect of electromagnetic shielding.
Currently, regular hexagon, rectangle and circular waveguide window are widely used, it can be reasonable in conjunction with actual conditions
Selection and use.However, needing to increase cut-off using the method for reducing waveguide window aperture when operating frequency range is higher
Frequency, and then achieve the purpose that improve shielding character, this will lead to the decline of the heat spreading function of waveguide slit；And waveguide window also has
Hole meets the electromagnetism of waveguide mode distribution waveform as the corresponding Mode Areas of the raising of cutoff frequency is also corresponding broadening
Wave will pass through hole and travel among other mediums, generate electromagnetic radiation pollution.
Summary of the invention
The main purpose of the present invention is to provide a kind of novel high shielding ventilation waveguide window constructions, it is intended to solve existing method
Present in the above technical problem.
To achieve the above object, the present invention provides one kind novel high shielding ventilation waveguide window construction, including multiple waveguide cavities,
The microwave absorbing coating of metal parts inside each waveguide cavity and each waveguide cavity cavity wall that is laid in is set；The waveguide cavity is set
It is set to the rectangular strip structure being made of four side walls, one end is signal input part, and the other end is signal output end.
Further, the metal parts specifically uses metallic membrane.
Further, the metallic membrane is arranged in waveguide cavity center.
Further, the metallic membrane surface is arranged along waveguide cavity channel direction.
Further, the metal parts specifically uses metal pin.
Further, the metal pin is arranged in waveguide cavity center.
Further, the metal pin is set as multiple, and is arranged in a linear and is mounted on waveguide cavity center.
Further, the metal pin is specifically arranged along waveguide cavity channel direction.
The invention has the following advantages:
(1) proposed by the present invention to be suitable for improving the waveguide window construction of electromagnet shield effect, it in practical applications can be at
Function increases waveguide transmission loss and improves the shield effectiveness of 20dB, and will not change the cutoff frequency of structure substantially；
(2) novel waveguide window construction waveguiding structure proposed by the present invention, has that the processing is simple, easy to assembly, customizable etc.
Feature improves shield effectiveness in the case where not influencing radiating efficiency, is a kind of novel high shielding ventilation waveguide window construction.
Detailed description of the invention
Fig. 1 is novel high shielding ventilation waveguide window structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram of single waveguide cavity of the invention；
Fig. 3 is the structural schematic diagram of the metallic membrane and microwave absorbing coating in the embodiment of the present invention 1；
Fig. 4 is the structural schematic diagram of the metal pin and microwave absorbing coating in the embodiment of the present invention 2.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
The primary solutions of the embodiment of the present invention are:
As shown in Figure 1, novel high shielding ventilation waveguide window construction of the invention, including multiple waveguide cavities, setting are each
The microwave absorbing coating of metal parts and each waveguide cavity cavity wall that is laid in inside waveguide cavity；The waveguide cavity is set as by four
The rectangular strip structure of side wall composition, one end is signal input part, and the other end is signal output end.
As shown in Fig. 2, waveguide cavity of the invention is set as the rectangular strip structure being made of four side walls, both ends are respectively
Signal input part and signal output end, specifically use metal material, by the size design of waveguide cavities, in required frequency
In band, signal is inputted from a port of the waveguiding structure, applies cut-off using electromagnetic wave of the outer layer metal to incoming wave guide cavity
Decaying is exported from the other port range of decrease.
The center of waveguide cavity is arranged in metal parts of the invention, when a port of signal from the waveguiding structure is defeated
It is fashionable, cut-off attenuation is applied by electromagnetic wave of the metal parts to incoming wave guide cavity, to improve the shielding properties of waveguiding structure.
Embodiment 1
As shown in figure 3, metal parts of the invention specifically uses metallic membrane, metallic membrane is inserted into waveguiding structure,
Metallic membrane setting is in waveguide cavity center, and metallic membrane surface is arranged along waveguide cavity channel direction.
Above-mentioned metallic membrane is that electric conductivity is strong, thickness is far smaller than waveguide wavelength but is far longer than one kind of skin depth
Foil is realized and applies cut-off attenuation to the electromagnetic wave to incoming wave guide cavity, to improve the shielding properties of waveguiding structure.
Embodiment 2
As shown in figure 4, metal parts of the invention specifically uses metal pin, a small amount of metallic pin is inserted into waveguiding structure
Nail, metal pin is arranged in waveguide cavity center, and metal pin is set as multiple, and is arranged in a linear and is mounted on waveguide cavity
Center, the orientation of metal pin are specially to arrange along waveguide cavity channel direction.
Above-mentioned metal pin is that electric conductivity is strong, radius is far smaller than waveguide wavelength but is far longer than one kind of skin depth
Metal parts is realized and applies cut-off attenuation to the electromagnetic wave to incoming wave guide cavity, to improve the shielding properties of waveguiding structure.
In addition, the present invention is also laid with microwave absorbing coating in each waveguide cavity cavity wall, microwave absorbing coating is specifically used such as carbonyl iron
The absorbing materials such as powder and carbon black；When electromagnetic wave transmits in waveguide cavity, outer layer metal applies cut-off attenuation to electromagnetic wave, inhales
Wave coating then applies attenuation by absorption to electromagnetic wave, to further increase the shielding properties of waveguiding structure.
The present invention is installed according to the suitable waveguide pore size of cabinet slit size selection with quantity, interference signal from this
The left end of structure inputs, and by the decaying of waveguide cavities, absorbing material and metallic membrane, exports from the right end port range of decrease.
Those of ordinary skill in the art will understand that the embodiments described herein, which is to help reader, understands this hair
Bright principle, it should be understood that protection scope of the present invention is not limited to such specific embodiments and embodiments.This field
Those of ordinary skill disclosed the technical disclosures can make according to the present invention and various not depart from the other each of essence of the invention
The specific variations and combinations of kind, these variations and combinations are still within the scope of the present invention.
Claims (8)
1. a kind of novel high shielding ventilation waveguide window construction, which is characterized in that including multiple waveguide cavities, be arranged in each waveguide cavity
The microwave absorbing coating of internal metal parts and each waveguide cavity cavity wall that is laid in；The waveguide cavity is set as by four side wall groups
At rectangular strip structure, one end is signal input part, and the other end is signal output end.
2. novel high shielding ventilation waveguide window construction as described in claim 1, which is characterized in that the metal parts is specifically adopted
Use metallic membrane.
3. novel high shielding ventilation waveguide window construction as claimed in claim 2, which is characterized in that the metallic membrane setting exists
Waveguide cavity center.
4. novel high shielding ventilation waveguide window construction as claimed in claim 3, which is characterized in that metallic membrane surface edge
The setting of waveguide cavity channel direction.
5. novel high shielding ventilation waveguide window construction as described in claim 1, which is characterized in that the metal parts is specifically adopted
Use metal pin.
6. novel high shielding ventilation waveguide window construction as claimed in claim 5, which is characterized in that the metal pin setting exists
Waveguide cavity center.
7. novel high shielding ventilation waveguide window construction as claimed in claim 6, which is characterized in that the metal pin is set as
It is multiple, and be arranged in a linear and be mounted on waveguide cavity center.
8. novel high shielding ventilation waveguide window construction as claimed in claim 7, which is characterized in that the specific edge of metal pin
The arrangement of waveguide cavity channel direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910607543.2A CN110351997A (en) | 2019-07-05 | 2019-07-05 | A kind of novel high shielding ventilation waveguide window construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910607543.2A CN110351997A (en) | 2019-07-05 | 2019-07-05 | A kind of novel high shielding ventilation waveguide window construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110351997A true CN110351997A (en) | 2019-10-18 |
Family
ID=68177877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910607543.2A Pending CN110351997A (en) | 2019-07-05 | 2019-07-05 | A kind of novel high shielding ventilation waveguide window construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110351997A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2509822Y (en) * | 2001-11-09 | 2002-09-04 | 中国船舶重工集团公司第七研究院第七○一研究所 | Ultrawideband cut-off waveguide ventilating box for screened room |
| CN102355809A (en) * | 2011-09-27 | 2012-02-15 | 华北电力大学 | Ventilation waveguide tube used for electromagnetic shielding |
| CN203289761U (en) * | 2013-06-19 | 2013-11-13 | 中国人民解放军总参谋部工程兵科研三所 | Electromagnetic shielding case |
| CN103732046A (en) * | 2012-10-10 | 2014-04-16 | 鸿富锦精密工业（深圳）有限公司 | Waveguide board and waveguide board combination |
| CN204498546U (en) * | 2015-04-17 | 2015-07-22 | 梁玉成 | A kind of electromagnetic shielding rack |
| CN107895827A (en) * | 2017-10-08 | 2018-04-10 | 南京邮电大学 | A kind of waveguide mode suppressor based on Disk-loaded waveguide technology |
-
2019
- 2019-07-05 CN CN201910607543.2A patent/CN110351997A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2509822Y (en) * | 2001-11-09 | 2002-09-04 | 中国船舶重工集团公司第七研究院第七○一研究所 | Ultrawideband cut-off waveguide ventilating box for screened room |
| CN102355809A (en) * | 2011-09-27 | 2012-02-15 | 华北电力大学 | Ventilation waveguide tube used for electromagnetic shielding |
| CN103732046A (en) * | 2012-10-10 | 2014-04-16 | 鸿富锦精密工业（深圳）有限公司 | Waveguide board and waveguide board combination |
| CN203289761U (en) * | 2013-06-19 | 2013-11-13 | 中国人民解放军总参谋部工程兵科研三所 | Electromagnetic shielding case |
| CN204498546U (en) * | 2015-04-17 | 2015-07-22 | 梁玉成 | A kind of electromagnetic shielding rack |
| CN107895827A (en) * | 2017-10-08 | 2018-04-10 | 南京邮电大学 | A kind of waveguide mode suppressor based on Disk-loaded waveguide technology |
Non-Patent Citations (1)
| Title |
|---|
| 夏艳君: "《中国优秀硕士学位论文全文数据库 信息科技辑》", 15 October 2018 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191018 |