CN203772976U - Flange coaxial testing device for shielding effectiveness of planar electromagnetic shielding material - Google Patents
Flange coaxial testing device for shielding effectiveness of planar electromagnetic shielding material Download PDFInfo
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- CN203772976U CN203772976U CN201320860570.9U CN201320860570U CN203772976U CN 203772976 U CN203772976 U CN 203772976U CN 201320860570 U CN201320860570 U CN 201320860570U CN 203772976 U CN203772976 U CN 203772976U
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- transition section
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Abstract
The utility model discloses a flange coaxial testing device for shielding effectiveness of a planar electromagnetic shielding material. The flange coaxial testing device includes an N type coaxial interface; an outer conductor including an outer conductor part of the N type coaxial interface, an outer conductor part of a transition section, and an outer conductor part of a test fixture with a flange plate, the outer conductor part of the transition section being connected between the outer conductor part of the N type coaxial interface and the outer conductor part of the test fixture with the flange plate; and an inner conductor including an inner conductor part of the N type coaxial interface, an inner conductor part of the transition section, and the inner conductor part of the test fixture with the flange plate, the inner conductor part of the transition section being connected between the inner conductor part of the N type coaxial interface and the inner conductor part of the test fixture with the flange plate, and an inner surface of the outer conductor part of the transition section and the inner conductor part of the transition section having quadratic curve profiles. The flange coaxial testing device for shielding effectiveness of the planar electromagnetic shielding material adopts a capacitance compensation method, device matching is ensured, the standing-wave ratio is improved, and test precision is improved.
Description
Technical field
The utility model relates to a kind of proving installation, and more specifically, the utility model relates to a kind of quafric curve type flange coaxial test device, for testing the shield effectiveness of plane electromagnetic shielding material.
Background technology
Along with the fast development of modern society's electronic information technology, the usage quantity of various electronics and IT products sharply increases, electromagnetic wave to the electromagnetic energy of the physical environment radiation of people life just with the speed rapid growth of annual 10% left and right, it is day by day serious that electromagnetic radiation pollution becomes thereupon, become the 4th large pollution source after atmospheric pollution, water pollution, noise pollution.Electromagnetic radiation not only can affect and disturb the normal operation of electronic equipment, and the electromagnetic wave leaking out also can affect computing machine, mobile phone etc. and require the information security of secret means of communication, and electromagnetic excess radiation also can threaten the healthy of the mankind.Research shows, in the time that electromagenetic wave radiation amount acquires a certain degree, can cause the disorderly of the functions such as immune system, cardiovascular system, nervous system and the imbalance that runs well for a long time, thereby bring out various diseases, especially some chronic diseases under this environment.The harm of electromagnetic radiation just causes the great attention of many countries many years ago, especially some developed countries are because its living standard is higher, more pay attention to, issued standard and the regulation of some electromagnetic radiation from environments, as German electrical technology association, US Federal Communication Committee etc.The CISPR of CISPR has also formulated the international standard of electromagenetic wave radiation interference for various countries' reference.The harm of electromagnetic radiation also caused the great attention of the Chinese government, and China has formulated the EMC standard about electromagnetic compatibility in 1988, executed since 2000.
Electromagnetic radiation be cannot see, impalpable, it is often easily ignored by people the injury of human body, especially the harm that the electromagnetic wave in life exists, as the extent of injury of mobile phone radiation, also there is dispute always, show but study, it exists really to the injury of human body, and its harm grows with each passing day.People's health is as an organism, and all the time not at outside radiated electromagnetic wave, this is very normal, but the intensity in various artificial radiation source is much larger than human body natural's radiation, and then has broken this balance, and human body is produced to harm.
How to prevent that electromagnetic radiation from becoming a popular discussion topic to people's harm.Various anti-electromagnetic radiation shielding materials arise at the historic moment, and have a wide range of applications in fields such as electric power, Aeronautics and Astronautics, environment, communication, national defence and health protection, and wherein shield effectiveness is a key index evaluating shielding material.
The standard of the current method of testing that relates to plane electromagnetic shielding material shield effectiveness has: ASTMD4935-2010, SJ20524-1996, GJB6190-2008, GB/T30142-2013(will come into effect on May 1st, 2014), current these standards have mainly specified screened room method and flange coaxial method of testing.
Wherein screened room method is that one is neither Yi Fei near field, far field or marginal method, because the radiation source in general life is mainly near field sources or between far field and near field, radiation environment is very complicated, be difficult to single Reality simulation environment, screened room method has solved this difficult problem of electromagnetic environment of Reality simulation complexity well.Screened room method can not only be tested planar materials, material that can also testing complex shape.
Flange coaxial method of testing is a kind of method of measuring shielding material that NBS (NBS) is recommended, and is a kind of shielding material method of testing of simulating far field environment.The main mould that this method is propagated in coaxial transmission line according to electromagnetic wave is this principle of transverse electromagnetic wave, the transmitting procedure in simulation free space far field, ELECTROMAGNETIC RADIATION SHIELDING fabric is carried out to the mensuration of plane wave, and compare another kind of remote field testing method---coaxial transmission collimation method, improve being connected of sample and coaxial cable, impedance when sample is contacted with ring flange reduces, and the repeatability of test result is improved.
In the standard of description flange Coaxial Test Method, 30MHz～1.5GHz flange coaxial test device of describing in ASTM D4935-2010, SJ20524-1996, GJB6190-2008,30MHz～3GHz flange coaxial test device that GB/T30142-2013 describes all adopt tapering transition section (formula: y=ax+b) joint flange test fixture and N-type coaxial interface, to ensure the continuity of internal and external conductor, reach impedance matching.
In the utility model patent (patent No. ZL201020505577.5) of applying for, the proving installation with improved tapering transition section has been described before applicant.
But, of the prior art is all linear transitions sections, although made up to a certain extent the sudden change of N-type coaxial interface and flange test fixture, but still can produce certain loss, in research process, find, compare linear transitions section, because quafric curve type transition section provides more preferably capacitance compensation, therefore cause less return loss.So, the flange coaxial test device with quafric curve type transition section that a kind of precision is higher is provided.
Utility model content
The purpose of this utility model is to provide a kind of improved plane electromagnetic shielding material shield effectiveness proving installation, and this device has been done improvement to the transition section geometry of flange coaxial test device, to improve measuring accuracy.
Applicant, by a large amount of practical operation, finds to adopt the transition section that geometric configuration is quafric curve can greatly improve measuring accuracy.
According to first aspect of the present utility model, a kind of plane electromagnetic shielding material shield effectiveness proving installation is disclosed, comprise a kind of shield effectiveness flange coaxial test device for plane electromagnetic shielding material, comprise N-type coaxial interface 1; Outer conductor, comprise the test fixture outer conductor portion 7 of outer conductor portion 3, transition section outer conductor portion 5 and the flanged dish of N-type coaxial interface, and transition section outer conductor portion 5 is connected between the outer conductor portion 3 of N-type coaxial interface and the test fixture outer conductor portion 7 of flanged dish; Inner wire, comprise the test fixture inner wire part 6 of inner wire part 2, transition section inner wire part 4 and the flanged dish of N-type coaxial interface, and transition section inner wire part 4 is connected between the inner wire part 2 of N-type coaxial interface and the test fixture inner wire part 6 of flanged dish, and wherein the inside surface of transition section outer conductor portion 5 and transition section inner wire part 4 have quafric curve type profile.
According to another aspect of the present utility model, a kind of shield effectiveness flange coaxial test device for plane electromagnetic shielding material is disclosed, wherein, transition section outer conductor portion and transition section inner wire part have parabolic type profile.
According to another aspect of the present utility model, a kind of shield effectiveness flange coaxial test device for plane electromagnetic shielding material is disclosed, wherein, transition section outer conductor portion and transition section inner wire part have hyperbolic-type profile.
According to another aspect of the present utility model, a kind of shield effectiveness flange coaxial test device for plane electromagnetic shielding material is disclosed, wherein, transition section outer conductor portion has with transition section inner wire part the parabolic equation formula that parameter is different.
According to another aspect of the present utility model, a kind of shield effectiveness flange coaxial test device for plane electromagnetic shielding material is disclosed, wherein, transition section outer conductor portion has with transition section inner wire part the Hyperbolic Equation formula that parameter is different.
According to another aspect of the present utility model, a kind of shield effectiveness flange coaxial test device for plane electromagnetic shielding material is disclosed, wherein, transition section outer conductor portion and transition section inner wire part are not overlapping with the Projection Line Segment on the horizontal center line of described proving installation.
According to another aspect of the present utility model, a kind of shield effectiveness flange coaxial test device for plane electromagnetic shielding material is disclosed, wherein, transition section outer conductor portion and transition section inner wire part are overlapping with the Projection Line Segment on the horizontal center line of described proving installation.
Compared with prior art, the utility model adopts the transition section with quafric curve type profile, thereby has compensated the coupling of device, has improved standing-wave ratio (SWR), has improved measuring accuracy.
Brief description of the drawings
Fig. 1 is the flange coaxial test device system architecture schematic diagram according to the utility model embodiment;
Fig. 2 is Fig. 1 shown device cut-open view.
In figure: 1---the cloudy head of N-type coaxial interface; 2---the inner wire part of N-type coaxial interface; 3---the outer conductor portion of N-type coaxial interface; 4---the inner wire part of quafric curve transition section; 5---the outer conductor portion of quafric curve transition section; 6---the test fixture inner wire part of flanged dish; 7---the test fixture outer conductor portion of flanged dish; 8---plane electromagnetic shielding material; 9---packing ring; 10---support the insulator of internal and external conductor; 11---air.
Embodiment
The utility model may have a lot of embodiment and various combination, will describe specific embodiment in detail with reference to accompanying drawing herein.But this is not that the utility model is limited in these embodiment by any way, within any combination, equivalent and substitute based on the utility model essence and technical scope that these embodiment annotate all drops on the utility model protection domain.
The word using in description is only used to describe specific embodiment, is not to limit by any way the utility model.
Describing in detail before accompanying drawing, it should be noted that described parts divide according to its major function.That is to say, two or more parts can be combined into parts, or parts can be divided into by function two or more parts.And each parts described below not only play a role by its major function, can also realize part or all function of other parts.On the contrary, the major function realizing of parts of possibility can be realized by other parts completely.Therefore each parts occurring in description may be described with function language.For the above-mentioned reasons, obviously, in the situation that not deviating from the utility model essence and technical scope, the flange coaxial test device of the plane shielding material shield effectiveness of realizing according to the utility model can be inconsistent with structure shown in the drawings.
Also by reference to the accompanying drawings the utility model is described in further detail below by specific embodiment:
Referring to Fig. 1, Fig. 1 is the utility model system architecture schematic diagram; In Fig. 1, detected materials 8(reference coupon or load sample) pass through rail clamp fixed placement in flange coaxial test device 100 of the present utility model, network analyzer provides input signal, signal is propagated with TEM waveshape in coaxial test device of the present utility model, while arriving detected materials 8, electromagnetic wave is reflected, absorbs and multiple reflections, and final network analyzer receives by the electromagnetic wave of detected materials 8.
The running of the flange coaxial test device of shield effectiveness described herein is as follows:
A. detected materials 8 is fixed in flange coaxial test device 100, tightens knob and fix and be tagged to a scale;
B. flange coaxial test device 100 is done to transmission calibration;
C. adjust loose flange coaxial test device 100, take out reference coupon, detected materials 8 is fixed in device, tighten the identical graduation of knob to step; Measure the shield effectiveness of detected materials.
Referring to Fig. 2, the cut-open view that Fig. 2 is proving installation of the present utility model.
In Fig. 2, proving installation 100 is symmetrical, comprises cloudy 1 of N-type coaxial interface, outer conductor 3,5,7, inner wire 2,4,6, Supporting Media 6, packing ring 9, the insulator 10 of support internal and external conductor.Wherein, outer conductor comprises the test fixture inner wire part 7 of outer conductor portion 3, transition section outer conductor portion 5 and the flanged dish of N-type coaxial interface, and this transition section outer conductor portion 5 is connected between the outer conductor portion 3 of N-type coaxial interface and the test fixture outer conductor portion 7 of flanged dish; And inner wire comprises the test fixture inner wire part 6 of inner wire part 2, transition section inner wire part 4 and the flanged dish of N-type coaxial interface, and transition section inner wire part 4 is connected between the inner wire part 2 of N-type coaxial interface and the test fixture inner wire part 6 of flanged dish.
In embodiment illustrated in fig. 2, the inside surface of transition section outer conductor portion 5 and transition section inner wire part 4 have quafric curve profile, and this hyp equation can be expressed as ax
2+ bxy+cy
2+ dx+ey+f=0 (wherein, a, b, c is not all 0 and b
2-4ac > 0)
In preferred embodiment of the present utility model; the quafric curve type outline portion of the inside surface of transition section outer conductor portion 5 and transition section inner wire part 4 can be hyperbolic curve; but the utility model is not limited to this; the inside surface of transition section outer conductor portion 5 and transition section inner wire part 4 also can have the profile of other quafric curve types such as para-curve, and this all drops in protection domain of the present utility model.
Further, in preferred embodiment of the present utility model, the inside surface of transition section outer conductor portion 5 and transition section inner wire part 4 have different quadratic curve equation formulas, or have identical quadratic curve equation formula.
Further, as shown in Figure 2, the inside surface of transition section outer conductor portion 5 and transition section inner wire part 4 parts stagger, and have dislocation compensation between the two.This means, the inside surface of transition section outer conductor portion 5 and the Projection Line Segment of transition section inner wire part 4 on the horizontal center line of proving installation 100 do not overlap.But; it should be noted that; in other embodiment of the present utility model; the inside surface of transition section outer conductor portion 5 and transition section inner wire part 4 parts also can not stagger; do not there is dislocation compensation between the two; this means, the inside surface of transition section outer conductor portion 5 and transition section inner wire part 4 Projection Line Segment on the horizontal center line of proving installation 100 overlaps, and such embodiment also falls in the utility model protection domain.
The utility model can bring following advantage:
(1) favorable repeatability, stable performance;
(3) characteristic impedance 50 Ω ± 0.5 Ω of device;
(4) standing-wave ratio (SWR) of device is less than 1.2;
(5) uncertainty of device is little: ± 3dB.
More than show and described the ultimate principle of the utility model patent and the advantage of principal character and the utility model patent.The technician of the industry should understand; the utility model patent is not restricted to the described embodiments; the principle that the utility model patent is just described of describing in above-described embodiment and instructions; do not departing under the prerequisite of the utility model spirit and scope; the utility model patent also has various changes and modifications, and these changes and improvements all fall in claimed the utility model the scope of the claims.The claimed scope of the utility model patent is defined by appending claims and equivalent thereof.
Claims (7)
1. for a shield effectiveness flange coaxial test device for plane electromagnetic shielding material, comprising:
N-type coaxial interface (1);
Outer conductor (3,5,7), described outer conductor comprises the test fixture outer conductor portion (7) of outer conductor portion (3), transition section outer conductor portion (5) and the flanged dish of N-type coaxial interface, and described transition section outer conductor portion (5) is connected between the outer conductor portion (3) of described N-type coaxial interface and the test fixture outer conductor portion (7) of described flanged dish;
Inner wire (2,4,6), described inner wire comprises the test fixture inner wire part (6) of inner wire part (2), transition section inner wire part (4) and the flanged dish of N-type coaxial interface, and described transition section inner wire part (4) is connected between the inner wire part (2) of described N-type coaxial interface and the test fixture inner wire part (6) of described flanged dish;
It is characterized in that, the inside surface of described transition section outer conductor portion (5) and described transition section inner wire part (4) have quafric curve type profile.
2. proving installation according to claim 1, is characterized in that, the inside surface of described transition section outer conductor portion (5) and described transition section inner wire part (4) have parabolic type profile.
3. proving installation according to claim 1, is characterized in that, the inside surface of described transition section outer conductor portion (5) and described transition section inner wire part (4) have hyperbolic-type profile.
4. proving installation according to claim 2, is characterized in that, the inside surface of described transition section outer conductor portion (5) and described transition section inner wire part (4) have and meet the differently contoured of different parabolic equation formulas.
5. proving installation according to claim 3, is characterized in that, described transition section outer conductor portion (5) inside surface and described transition section inner wire part (4) have and meet the differently contoured of different Hyperbolic Equation formulas.
6. according to the proving installation described in any one in claim 1-5, it is characterized in that, described transition section outer conductor portion (5) and described transition section inner wire part (4) Projection Line Segment on the horizontal center line (L) of described proving installation does not overlap.
7. according to the proving installation described in any one in claim 1-5, it is characterized in that, described transition section outer conductor portion (5) and described transition section inner wire part (4) Projection Line Segment on the horizontal center line (L) of described proving installation overlaps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320860570.9U CN203772976U (en) | 2013-12-24 | 2013-12-24 | Flange coaxial testing device for shielding effectiveness of planar electromagnetic shielding material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320860570.9U CN203772976U (en) | 2013-12-24 | 2013-12-24 | Flange coaxial testing device for shielding effectiveness of planar electromagnetic shielding material |
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| Publication Number | Publication Date |
|---|---|
| CN203772976U true CN203772976U (en) | 2014-08-13 |
Family
ID=51290153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320860570.9U Expired - Fee Related CN203772976U (en) | 2013-12-24 | 2013-12-24 | Flange coaxial testing device for shielding effectiveness of planar electromagnetic shielding material |
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| CN (1) | CN203772976U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237575A (en) * | 2014-10-10 | 2014-12-24 | 天津工业大学 | Coaxial fixture for testing of electromagnetic property of material |
| CN104730369A (en) * | 2013-12-24 | 2015-06-24 | 上海市计量测试技术研究院 | Shielding effectiveness flange coaxial testing device for planar type electromagnetic shielding material |
| CN105812071A (en) * | 2014-12-30 | 2016-07-27 | 展讯通信（上海）有限公司 | Wireless signal penetration test system, penetration test device therefor and wireless signal penetration test method |
| CN106645811A (en) * | 2016-10-09 | 2017-05-10 | 周峰 | direct current test transmission device |
-
2013
- 2013-12-24 CN CN201320860570.9U patent/CN203772976U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104730369A (en) * | 2013-12-24 | 2015-06-24 | 上海市计量测试技术研究院 | Shielding effectiveness flange coaxial testing device for planar type electromagnetic shielding material |
| CN104237575A (en) * | 2014-10-10 | 2014-12-24 | 天津工业大学 | Coaxial fixture for testing of electromagnetic property of material |
| CN104237575B (en) * | 2014-10-10 | 2017-03-08 | 天津工业大学 | A kind of coaxial holder of test material electromagnetic property |
| CN105812071A (en) * | 2014-12-30 | 2016-07-27 | 展讯通信（上海）有限公司 | Wireless signal penetration test system, penetration test device therefor and wireless signal penetration test method |
| CN106645811A (en) * | 2016-10-09 | 2017-05-10 | 周峰 | direct current test transmission device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20191224 |