CN101593565B - Portable electromagnetic shielding box used for testing weak signals of mobile terminal - Google Patents
Portable electromagnetic shielding box used for testing weak signals of mobile terminal Download PDFInfo
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- CN101593565B CN101593565B CN2009101487682A CN200910148768A CN101593565B CN 101593565 B CN101593565 B CN 101593565B CN 2009101487682 A CN2009101487682 A CN 2009101487682A CN 200910148768 A CN200910148768 A CN 200910148768A CN 101593565 B CN101593565 B CN 101593565B
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Abstract
The invention provides a portable electromagnetic shielding box used for testing weak signals of a mobile terminal. The portable electromagnetic shielding box is provided with six panels which are all made of aluminum or aluminum alloy, and a flat wave absorbing material and a wedge wave absorbing material are mixed and stuck to the six panels to absorb incident wave of each direction; on the bottom panel, the position where a device to be tested is positioned is also provided with an insulating dielectric plate to insolate a terminal to be tested and the wave absorbing materials, the insulating dielectric plate is placed in the box, and the mobile terminal to be tested is placed on the insulating dielectric plate when testing; the top panel is provided with a connector for the signals to access, and the connector is connected through a welding mode to realize good electrical contact of a system; the front panel is provided with an opening which is convenient for putting and taking the device to be tested; and the periphery of the opening is provided with a conductive gasket and a shielding mesh belt to form a door frame and also provided with a door for closing and opening the opening. The electromagnetic shielding box has the advantages of good shielding performance, small volume and light weight, and greatly improves the portability of a shielding box body.
Description
Technical field
The present invention relates to a kind of portable electromagnetic shielding box, relate in particular to a kind of portable electromagnetic shielding box that is used for moving whole testing weak signals.
Background technology
Along with the complexity day by day of mobile communication terminal (as mobile phone, notebook computer etc.) function and constantly reducing of size, the interference problem between each module of the terminal system of bringing thus also becomes increasingly conspicuous.For thereby itself and external signal are isolated the size of successfully testing undesired signal, the test that standard code is correlated with in anechoic chamber.At present, the microwave dark room that is used for the portable terminal Electromagnetic Interference Test of standard code is not to be optimized design at the portable terminal product specially to obtain, and it is bulky, tens meters easily, has taken up an area of a large amount of areas; And wherein also a large amount of metal materials such as steel, iron that use, Heavy Weight, cost an arm and a leg, build, resettlement, safeguard and use all very complicatedly, not only had a strong impact on the raising of relevant enterprise design department testing efficiency, also prolonged the cycle of research and development greatly.Therefore, research and development and tester be a kind of more portable shielding case body of exigence very, to simplify test process.
As mentioned above, as one of important component part of portable terminal Electromagnetic Interference Test equipment, electromagnetic shielding box has played shielded box inside and outside electromagnetic field, has safeguarded the effect of measured signal quality.At present, the shield effectiveness of test casing commonly used is mainly used in consistance (up to standard) test of end product eme performance about 80dB both at home and abroad, and its main tested object is the external electromagnetic radiation of portable terminal product integral body.Different with above-mentioned tested object, the signal intensity that inner each module of portable terminal produces all very faint (be low to moderate-130dBm), level well below the external Electromagnetic Launching of integral body, therefore press for the better casing of a kind of shielding properties with the faint measured signal that guarantees inner each module of portable terminal and produce in test process not by external electromagnetic environment institute " pollution ", promptly disturb, thus the accuracy of assurance test.
Summary of the invention
The object of the present invention is to provide a kind of in light weight, volume is little, the portable shielding case body of advantages of good shielding performance, to satisfy at present the measurement of the feeble signal that each module of portable terminal inside is produced.
The invention provides a kind of portable electromagnetic shielding box that is used for the testing weak signals of inner each module generation of portable terminal, it has six panels, six panels are all made with aluminium or aluminium alloy, and the inside surface of six panels mixes and is pasted with Electromagnetic Wave Absorbing Plate and wedge absorbing material to absorb the incident wave of all directions; On bottom panel, be provided with an insulation medium board that is used to isolate portable terminal to be measured and absorbing material, this insulation medium board places in the case, during test portable terminal to be measured is placed on this insulation medium board; On top panel, be provided with the joint of a signal turnover, and be fixed on the panel to realize the excellent electric contact of system by welding manner; On the plate, be provided with and be convenient to the opening that portable terminal to be measured is put into and taken out in front, around opening, be provided with conductive gasket and shielding guipure, also be provided with the door that is used to close and open opening in front on the plate to form doorframe.
The contact portion of doorframe and door will be carried out electroplating processes, to improve its electric conductivity.
Conductive gasket and shielding guipure are mainly used in the electromagnetic leakage that suppresses casing.
Rotation angle position in the electromagnetic shielding box is pasted Electromagnetic Wave Absorbing Plate, and remainder is then pasted the wedge absorbing material.
The beneficial effect that portable electromagnetic shielding box provided by the present invention reached is: the casing volume is little, and in light weight and advantages of good shielding performance has improved the portable of shielding case body greatly and suppressed the electromagnetic leakage of casing.
Description of drawings
Fig. 1 is the structural representation of electromagnetic shielding box of the present invention;
Fig. 2 is the schematic layout pattern of absorbing material of other each panel inner surface except that front panel of electromagnetic shielding box of the present invention;
Fig. 3 is the layout of inside surface of the front panel of electromagnetic shielding box of the present invention.
Embodiment
Below, be described with reference to the accompanying drawings the most preferred embodiment of the structure of the portable electromagnetic shielding box 1 that is used for the testing weak signals that inner each module of portable terminal produces provided by the invention.Parts identical in the accompanying drawing adopt identical Reference numeral.
Fig. 1 is the structural representation according to electromagnetic shielding box of the present invention.Electromagnetic shielding box 1 is a rectangular parallelepiped shell body, it has six panels, it is bottom panel, identical with the bottom panel size and be oppositely arranged top panel, front panel 2 (being front plate), with front panel equal and opposite in direction and the rear panel that is oppositely arranged, left panel, and with left panel equal and opposite in direction and the right panel that is oppositely arranged.Each panel mainly adopts the aluminum or aluminum alloy material to make, to alleviate the weight of shielding case body.Each panel connects into the body structure of a rectangular build by welding technology.Wherein, on bottom panel, the residing position of Devices to test also is provided with insulation medium board 7 specially to isolate portable terminal to be measured and absorbing material, and this insulation medium board 7 places in the case, during test portable terminal to be measured is placed on this insulation medium board 7.On top panel, only be provided with the joint 8 of signal turnover, and be fixed on the top panel, thereby reduced the imperfection of body structure as much as possible by welding manner, realize the excellent electric contact of system.On the plate 2, be provided with and be convenient to the opening 3 that portable terminal to be measured is put into and taken out in front, this opening the best is a rectangle.Be used to suppress the conductive gasket 5 of casing electromagnetic leakage and shield guipure 6 being provided with near the edge of opening place all around of opening 3 to form doorframe.In addition, also be provided with the door 4 that is used to close and open opening in front on the plate, and this door 4 is made with aluminium or aluminium alloy also.The contact portion of doorframe and door 4 will be carried out electroplating processes, to improve its electric conductivity.The inside surface of door also will carry out electroplating processes, and this electroplates preferably copper plating.Door is slightly larger than opening, so that with screw door is fixed on the doorframe.The door when being fixed on the doorframe by screw, liner and gauze screen band are pushed, by the extruding can guarantee doorframe and the door between excellent electric contact, thereby guarantee good electromagnetic wave shielding.
For keeping the regular distribution of electromagnetic field in the shielding case body, in the rectangular parallelepiped shell body, promptly the inside surface of six panels will mix and paste Electromagnetic Wave Absorbing Plate and wedge absorbing material to absorb the incident wave of all directions.Fig. 2 is the schematic layout pattern according to the absorbing material of other each panel inner surface except that front panel of electromagnetic shielding box of the present invention.As shown in Figure 2, paste the wedge absorbing materials at the central part 10 of other each panel inner surface except that front panel, 9 paste Electromagnetic Wave Absorbing Plate around the central part 10 of panel inner surface.Fig. 3 is the schematic layout pattern of inside surface of the front panel of electromagnetic shielding box of the present invention.As shown in Figure 3, on the plate 2, surround opening 3 and be provided with the two circles conductive gasket 5 similar all around in front to opening 3 shapes.Between two circle conductive gaskets 5, fill metallic shield guipure 6.Conductive gasket 5 and metallic shield guipure 6 have formed the doorframe of opening 3 near the edge of opening.In front on the inside surface of plate 2 around 12 be pasted with Electromagnetic Wave Absorbing Plate, on the front panel inside surface around 9 and doorframe between the position of not pasting Electromagnetic Wave Absorbing Plate 11 be pasted with the wedge absorbing material.Inside surface at door 4 is also pasted the wedge absorbing material, and the area of pasting absorbing material is identical with the area of the opening 3 of front panel 2, and when having closed opening 3 with assurance door 4, whole shell inner surface all is pasted with absorbing material.So, the formed portable electromagnetic shielding box that is used for testing weak signals of mobile terminal, paste Electromagnetic Wave Absorbing Plate at the interconnective rotation angle position of the inside surface of six panels of casing respectively, all the other inside surfaces are pasted the wedge absorbing material, such layout has also been saved the test space as much as possible when guaranteeing that absorbing material all covers the metal shell inside surface.
The electroplating processes of contact portion of doorframe and door, and the conductive gasket of around openings setting and shielding guipure have been realized the excellent electric contact between the casing various piece.The employing of above-mentioned measure has suppressed the electromagnetic leakage of casing to greatest extent, has guaranteed the shielding properties of casing.
The portable performance aspect: by changing shielding material, aluminium or the aluminium alloy less with density substitute bigger steel and the iron of density, thereby realize the remarkable reduction of shielding case body weight.In addition, at the small and exquisite characteristics of size of mobile terminals, can design the size of casing targetedly.With mobile phone, notebook computer etc. is example, and the length of side of shielding case body can not surpass 1 meter usually, and box sizes is very little.In sum, the reduction of the reducing of volume, density of material makes the volume and weight of shielding test box all reduce greatly, thereby has greatly improved the portability of shielding case body.
Though the present invention makes an explanation by the embodiment shown in the above-mentioned accompanying drawing.But it should be appreciated by those skilled in the art that the present invention is not limited to these embodiment, but covered various variations or the modification that does not break away from spirit of the present invention.Thereby scope of the present invention is limited by appended claims and equivalent thereof.
Claims (4)
1. portable electromagnetic shielding box that is used for testing weak signals of mobile terminal, it has six panels, it is characterized in that:
Six panels all adopt aluminium or aluminium alloy to make, and paste the wedge absorbing material at the central part (10) of other each panel inner surface except that front panel, and (9) paste Electromagnetic Wave Absorbing Plate around the central part (10) of panel inner surface; On the plate (2), surround opening (3) and be provided with the two circles conductive gasket (5) similar all around in front to opening (3) shape; Between two circle conductive gaskets (5), fill metallic shield guipure (6); Conductive gasket (5) and metallic shield guipure (6) have formed the doorframe of opening (3) near the edge of opening; In front on the inside surface of plate (2) around (12) be pasted with Electromagnetic Wave Absorbing Plate, on the front panel inside surface around the position of not pasting Electromagnetic Wave Absorbing Plate (11) between (9) and the doorframe be pasted with the wedge absorbing material; Inside surface at door (4) is also pasted the wedge absorbing material, and the area of pasting absorbing material is identical with the area of the opening (3) of front panel (2), and when having closed opening (3) with assurance door (4), whole shell inner surface all is pasted with absorbing material;
On bottom panel, be provided with an insulation medium board that is used to isolate portable terminal to be measured and absorbing material, this insulation medium board places in the case, during test portable terminal to be measured is placed on this insulation medium board;
On top panel, be provided with the joint of a signal turnover, and be fixed on the top panel to realize the excellent electric contact of system by welding manner.
2. portable electromagnetic shielding box according to claim 1 is characterized in that, the contact portion of doorframe and door will be carried out electroplating processes, to improve electric conductivity.
3. portable electromagnetic shielding box according to claim 1 is characterized in that, described conductive gasket and shielding guipure are the electromagnetic leakages that is used to suppress casing.
4. portable electromagnetic shielding box according to claim 1 is characterized in that, described electromagnetic shielding box is rectangular build.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101487682A CN101593565B (en) | 2009-07-03 | 2009-07-03 | Portable electromagnetic shielding box used for testing weak signals of mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101487682A CN101593565B (en) | 2009-07-03 | 2009-07-03 | Portable electromagnetic shielding box used for testing weak signals of mobile terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101593565A CN101593565A (en) | 2009-12-02 |
| CN101593565B true CN101593565B (en) | 2011-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101487682A Expired - Fee Related CN101593565B (en) | 2009-07-03 | 2009-07-03 | Portable electromagnetic shielding box used for testing weak signals of mobile terminal |
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| Country | Link |
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| CN (1) | CN101593565B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102509961A (en) * | 2011-10-24 | 2012-06-20 | 波达通信设备（广州）有限公司 | Radio-frequency cable interface device and shield method thereof |
| CN103837719B (en) * | 2014-03-06 | 2016-08-24 | 昆山市力格自动化设备有限公司 | A kind of shielding test device |
| CN105578855A (en) * | 2016-01-28 | 2016-05-11 | 宁波健信核磁技术有限公司 | Leakage magnetic field shielding device for magnetic resonance imager |
| CN106052991B (en) * | 2016-05-24 | 2018-11-27 | 贵州航天电子科技有限公司 | A kind of product mistake reaction test system |
| CN106815430B (en) * | 2017-01-16 | 2019-09-06 | 北京邮电大学 | Building model construction method and device in electromagnetic environment emulation |
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2009
- 2009-07-03 CN CN2009101487682A patent/CN101593565B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101593565A (en) | 2009-12-02 |
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Granted publication date: 20110413 Termination date: 20180703 |