CN1768446A - A device for shielding electronic units including a transmitting/receiving equipment and especially for shielding mobile phones - Google Patents
A device for shielding electronic units including a transmitting/receiving equipment and especially for shielding mobile phones Download PDFInfo
- Publication number
- CN1768446A CN1768446A CN200480008949.0A CN200480008949A CN1768446A CN 1768446 A CN1768446 A CN 1768446A CN 200480008949 A CN200480008949 A CN 200480008949A CN 1768446 A CN1768446 A CN 1768446A
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- China
- Prior art keywords
- winding
- antenna
- mobile phone
- quartzy
- crystal
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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
- H05K9/0052—Shielding other than Faraday cages
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/16—Screening or neutralising undesirable influences from or using, atmospheric or terrestrial radiation or fields
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/245—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with means for shaping the antenna pattern, e.g. in order to protect user against rf exposure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/3833—Hand-held transceivers
- H04B1/3838—Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Computer Networks & Wireless Communication (AREA)
- Animal Behavior & Ethology (AREA)
- Radiology & Medical Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Biomedical Technology (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Abstract
The invention relates to an appliance for shielding, especially, electronic elements with transmitters, such as a moblie phone to prevent electromagnetic radiation. The appliance includes a crystal and a winding/spiral which is winded by the central crystal. One end of the winding extends close adjacent to the electronic elements. The appliance further comprises a second winding made of ferromagnetic material and a v.
Description
Technical field
The present invention relates to be used for shielding electronic components, the electronic component that especially comprises transmitter prevents the device of electromagnetic radiation.
Background technology
Several years ago, mobile phone is costliness but also rare not only, so the issuable adverse effect of mobile phone does not become focus.Nowadays, the latter's attitude has been changed, especially because most of people not only have the common fixed line phone of family but also have the mobile phone of carrying in many countries.Therefore, the electromagnetic radiation that mobile phone sends has been proposed, just, not only transmitter and antenna radiation emitted, and all the other elements of mobile phone, for example whether the radiation of sending such as microprocessor, display can optionally produce the problem of adverse effect to bodily tissue.
Identical from being used for the used radiation of heated food in the radiation of the transmitter of mobile phone and antenna and the microwave oven, therefore clearly this radiation can exert an influence to dissimilar bodily tissues really.Yet the frequency, radiation intensity and the radiation wavelength that produce adverse effect are not obvious.The high intense radiation meeting of test shows characteristic frequency causes the variation of cell, the variation of cell and then can cause for example producing cancer or fetal anomaly.Yet, only under strong relatively influence, can find this clearly sign, but the influence under quite low radiation intensity for a long time of people's imagination also can cause disease and damage.Yet, also do not have to find the specific sign of harmful frequency, harmful radiation levels and harmful radiation wavelength.Yet, exist may reducing of radiation levels and may finally produce wholesome effect view unanimous on the whole like this.
Knownly manyly be used for shielding from the radio radiation of mobile phone and the device of other type of radiation.Can classify to these devices according to the structure of shielding.
The first kind is about being used for shielding the device of existing mobile phone.For example WO 02/095867A1 has described a plurality of this devices.A form that becomes box or bag in these devices, mobile phone is placed on wherein, and wherein this box or bag are by the material with shielding character, and for example metal fabric or panel element are made.Mobile phone is placed on makes it can shield most of electromagnetic radiation of being launched in this bag or this box.Also describe accessory, for example made it possible to when using mobile phone, between mobile phone and user's ear, insert the cap or the glasses of the ad hoc structure of certain-length shielding material.The latter's material must be able to be penetrated by sound wave.Disclosing of other, for example JP11-261271 described lid how to give mobile phone be equipped with one can electromagnetic radiation shielding thin layer.
DE 201 03 737 U1 disclose by at least 30% jewel, semi-precious stone or quartzy made device, and wherein this device is set to contiguous radiation source with limit electromagnetic radiation.
Other device that is used for reducing radiation comprises near the antenna of the transmitter that is arranged on mobile phone interior or or described mobile phone and near device, the result is that mobile phone is along specific direction, the for example radiation of sending towards user's head, with along other direction, for example the radiation of sending away from user's head is significantly different.This device for example can be the screening arrangement of type described in GB 2350725 A, wherein said device be arranged on the transmitter of mobile phone and described mobile phone between the usual operating period towards between this side of user.This device can be formed by a kind of screen with common shielding properties.Other patent, for example GB 2336035, described on the antenna that is fastened to mobile phone, to reduce the element that changes near the radiation field form the mobile phone antenna towards the mode of the radiation of user's head.
At last, according to GB 2350482 A, thus can be to reduce the mode of the field of proximal subscribers head straight thus away from the user, with respect to the position of the position change antenna that is connected with mobile phone usually.Also described mobile phone, wherein specific Antenna Design has changed near the intensity of the radiation field the mobile phone.
Top solution and other solution with this essence have changed the radiation that the mobile phone user suffered really more or less.Yet described technology is subjected to the obstruction of a plurality of shortcomings.The main purpose of mobile phone portable really is just little of being contained in the sack or in the pocket and in light weight.In addition, it must be possible using mobile phone in mode not crooked, that push or damage shielding device.Some solutions are placed on a kind of inside of screening arrangement with mobile phone, and this screening arrangement radiation-screening well.Yet some screening arrangements have also increased mobile phone in size and weight, have caused reducing the user friendly of mobile phone.Correspondingly, it is interior or neighbouring or be fastened on the antenna that several means is fastened on transmitter, they really the shielding user prevent radiation, but these devices also make quite inconvenience and may increase its weight of mobile phone, the result is the user friendly that has reduced mobile phone.Do not change significantly that the performance of emittor/receiver is vital in the mobile phone.
Above-mentioned all solutions comprise the so-called conventional shielding means of shielding mobile phones of being used for more or less, and just, known have the electric conducting material of good radiation-screening performance and/or a metal device of ferrimagnet.Yet, also exist and shield the another kind of possibility that mobile phone for example prevents radiation.
Disclosure of the Invention
The screening arrangement that the purpose of this invention is to provide a kind of the above-mentioned type, be used for shielding the electronic component that prevents to have transmitter, the for example mobile phone electromagnetic radiation of sending, it is light relatively, compact and reliable simultaneously, and can comprise in simple mode in the design phase of electronic component or be installed in after a while in the existing electronic component.
According to the present invention, the screening arrangement of the above-mentioned type is characterised in that it comprises quartzy and winding/spiral, and wherein this winding/spiral twines around this crystal, and the antenna of an end of this winding next-door neighbour electronic component extends.This device is operation as sucking circuit (suction circuit), and can be with the energy of institute's radiation emitted from a position transfer to another position, perhaps in other words, it can reflected radiation.The principle of this device principle with crystal set (crystal set) in many aspects is identical, just, wherein should crystal in principle as the receiver of electromagnetic radiation, and wherein flat, dish type winding blocks and shifts the energy from electromagnetic radiation, and it is aimed at antenna.At this, that advantage for example definitely is is quartzy, the crystal of snow quartzy (snow quartz) or rose quartz has the shielding properties for electromagnetic radiation, and wherein flat, dish type winding is blocked and transferred to electromagnetic radiation by crystal.About this point, this crystal has some very important characteristics.Quartzy structure and high Q value make it be difficult to, and that is to say to change quartzy frequency of oscillation or frequency in fact hardly, and therefore inductance flat, the dish type winding and electric capacity are just so unimportant.In addition, verified, one end of winding direction flat, the dish type winding and this winding is very important around the winding direction of the antenna of electronic component, because is necessary around this crystal with respect to one of mobile phone specific winding direction, an end of winding must twine around antenna along specific direction simultaneously.In order to determine correct winding direction, it often is necessary using " trial-and-error method ", because described winding direction especially depends on the position and the structure of antenna.
This system with for example shield the normally used device of mobile phone and compare very unusual.Yet, test shows, obtained the quite significantly minimizing of mobile phone towards the electromagnetic radiation that the user sent, and do not worsened the emission/condition of acceptance of this mobile phone simultaneously significantly, described deterioration is the situation that may occur in the known technology of routine.
Brief description of the drawings
Explain the present invention below with reference to accompanying drawing, wherein
Figure 1A illustrates the location (c) of the mobile phone (a) with exterior antenna, the mobile phone (b) that does not have this exterior antenna and patch antenna (patch-antenna) respectively to 1C,
Fig. 2 illustrates according to device of the present invention,
Fig. 3 A and 3B illustrate the position and the winding direction of winding in the mobile phone with exterior antenna,
Fig. 4 A and 4B with Fig. 3 in identical mode, but illustrate position and winding direction in inside antenna, and
Fig. 5 illustrates the situation that comprises ferromagnetic element.
Implement best mode of the present invention
Identical Reference numeral is used for components identical.
Figure 1A illustrates the mobile phone a with exterior antenna 2, and Fig. 2 B illustrates does not have the mobile phone of exterior antenna b.This mobile phone of two types is the mobile-telephone-type of normal use, so description of the invention concentrates on these two kinds of embodiment.Yet, should not understand the latter, because can be used in combination with the other electron component that comprises built-in emittor/receiver according to screening arrangement of the present invention in the mode of restriction yet.The antenna 2 of diagram mobile phone a is arranged on the left side of this mobile phone, but it also can be arranged on the right side (not shown) of this mobile phone or on the another location of this mobile phone, for example on rear side or front side, perhaps under being the situation of folded form, mobile phone is arranged near the side the hinge.The mobile phone b of other type comprises an inside antenna, and just this antenna is invisible on the mobile phone shown in Figure 1B.Comprise a so-called patch antenna in the lid that is installed to this mobile phone b on the contrary at the mobile phone b shown in Figure 1B.This patch antenna 3 can be arranged on the diverse location place in the mobile phone, but often it is arranged near the place, the top the mobile telephone speaker, with reference to figure 1C, as shown in the figure, for example it is arranged on the left side of mobile phone, but also it can be arranged on the centre or the right side of described mobile phone.How the type of employed antenna operates screening arrangement according to the present invention does not have specific influence, but as described below, and the type of antenna is to the influence that is positioned with of described screening arrangement.
Fig. 2 shows according to screening arrangement of the present invention.Screening arrangement 4 comprises that by lead 7 interconnective first winding 5 and second windings 6 wherein crystal 8 is arranged on the center of first winding 5.First winding 5 normally is arranged on flat, the dish type winding around quartzy 8, and it can comprise an any amount winding, for example between 1 and 100 winding.When first winding 5 is flat during with dish type, lead is arranged in the spiral in the layer usually.Yet winding 5 can comprise more layer and present preset thickness that this is favourable when the element that screening arrangement 4 is applied as on the circuit card.Quartzy 8 as the receiver of electromagnetic radiation and first winding 5 as receiver and second winding 6 as by the transmitter of quartzy 8 electromagnetic radiation that received the time, screening arrangement 4 has a lot of something in common with old-fashioned crystal set.As a result, this device also is used as for example from the known suction circuit of radiotechnics, and therefore it also can block and launch electromagnetic radiation.Winding 5,6 be connected lead 7 and make by material with good electric conductivity, materials such as copper, silver, gold for example, and this lead itself can be insulated usually, for example by lacquer or insulation synthetic material, perhaps it can expose.This winding also can comprise two or more leads of mutual winding, and single lead can have different electrical characteristics.
Employed quartzy 8 can be polytype crystal, both can be natural also can synthesizing.Two kinds of natural crystals of test shows, snow quartz and rose quartz are suitable crystal, but other types of crystals with similar characteristics also is available.The key character that will observe when selecting crystal is quartzy characteristic relevant with electromagnetic radiation in the frequency relevant with the electronic component that comprises emittor/receiver.
As mentioned, first winding 5 is as the receiver of quartzy 8 electromagnetic radiation that received, and this radiation is transferred to second winding 6.Therefore, can easily second winding 6 is set to link to each other with electronic unit antenna, the result be that electromagnetic radiation subsequently can be launched once more away from the user.
Use screening arrangement 4 according to the present invention makes it possible to confirm to have in the mobile phone position of certain strength radiation.First winding 5 that will have crystal 8 subsequently is set to be close to described position, then second winding 6 is linked to each other with the antenna of this device.
How Fig. 3 illustrates two examples that will screening arrangement 4 according to the present invention be arranged in the mobile phone.The antenna 2 that these two examples illustrate mobile phone is separately positioned on the right side and the left side of described mobile phone.Verified, first winding 5 is important around quartzy and second winding 6 around the winding direction separately of antenna 2, because " incorrect " winding direction causes the deterioration according to device shield effectiveness of the present invention.Test shows, when antenna was arranged on the left side of mobile phone, first winding 5 must outwards twine around quartzy 8 counter-clockwise direction from the inboard and twine around the suitable pointer direction of the antenna of mobile phone, referring to Fig. 3 A.In Fig. 3 B, the antenna of mobile phone is arranged on the right side of described mobile phone, and first winding 5 must outwards twine around quartzy 8 clockwise directions from the inboard and twine around antenna 2 counter-clockwise direction of described mobile phone so.In addition, verified, when first or second winding 5,6 winding direction separately was reverse, shield effectiveness significantly reduced thereupon.Yet the latter's observation is based on the test of being undertaken by " trial-and-error method ", and the structure of antenna itself determines to produce the winding winding direction of desirable shielding probably.In laboratory tests the latter, especially be used for measuring the radiation that mobile phone sends, provided a possible explanation that can occur this situation why below.
Identical with the mode of Fig. 3, Fig. 4 illustrates the location according to screening arrangement 4 of the present invention, but has wherein used patch antenna.Do not resemble exterior antenna 2, inside antenna is arranged on the inside of mobile phone lid, and the result is that second winding 6 needn't twine around this patch antenna 3, but will be arranged on the contrary directly push up/contiguous winding at patch antenna 3.The condition about the winding direction of patch antenna 3 and location that test shows is identical with use giving condition with the exterior antenna of Fig. 3 associated description is suitable equally.
As mentioned above, verified, the winding direction of first and second windings 5,6 is very important, because " incorrect " winding direction causes comparing with the effect that obtains by " correct " winding direction the shield effectiveness of obvious reduction.The latter may be because second winding 6 especially needs to produce the good such fact of coupling with the antenna of electronic component.Be relevant to exterior antenna, the lead of selecting " correct " and " incorrect " winding direction to mean to twine clockwise in antenna makes and also must twine clockwise and necessitate in order to obtain between the antenna and second winding 6 second winding 6 that may be coupled of the best.When selecting opposite winding direction, the coupling between the antenna 2 and second winding 6 still exists, but this coupling is compared obvious reduction with top coupling, and the result is that shield effectiveness is also compared obvious reduction with the shield effectiveness that obtains above.Same reason also is applicable to patch antenna 3, second winding 6 comprising the patch antenna 3 that twines clockwise also must twine clockwise, cause in response to the type and the position of antenna a lot of possible winding directions being arranged, some in these winding directions are especially good, and some are especially poor.Because the winding direction that is adopted is difficult to directly see from the outside of antenna, therefore adopts so-called " trial and error " method to determine that the possible winding direction of electronic component specific embodiment often is necessary.
Should be noted that, can in identical electronic component, use severally, be used for shielding the radiation source of several independent electromagnetic radiation radiation according to screening arrangement 4 of the present invention.In order to obtain good shielding, several first windings 5 with crystal 8 must be arranged on the diverse location place of mobile phone inside thereupon.Therefore, first winding 5 with quartzy 8 can be embodied as the standard component on a kind of circuit card that can be arranged on integrated circuit form for example or the element of other type, then line 7 and second winding 6 be connected on the pin on this element.
Should be noted that Fig. 3 to 5 can give the such impression of people, screening arrangement according to the present invention is to be used for shielding existing electronic component, and for example mobile phone mounts (post-mounted) element.Really also can use by this way according to screening arrangement of the present invention, but it also can be included in the design phase of for example mobile phone, the result is with annex, and just first and second windings 5,6 and quartzy 8 are to be fixed in the mobile phone designing favourable mode.In addition, to be equipped with this screening arrangement be not just can see immediately to mobile phone.
As shown in Figure 5, also can be equipped with other winding 11 to screening arrangement, winding 11 for example is the wire form with ferromagnetic characteristic, just iron lead or nickel wire line.Though this screening arrangement itself does not have shield effectiveness when having above-mentioned lead yet, when around first winding 5 this lead being set as shown in Figure 5, the shield effectiveness of this screening arrangement has obtained improving significantly.This additional winding can comprise single, open winding as shown in Figure 5, the perhaps winding of several openings.Test shows surprisingly, forms polygon when adding winding 11, and when especially forming open triangle as shown in Figure 5, it has guaranteed especially good shield effectiveness.Lead 11 with ferromagnetic property can be made by several different materials, for example common iron lead, but it also can comprise the material of other common ferromagnetic material for example or the more special ferromagnetic material of permalloy (permaloy) or μ one metal for example.Test shows that also additional winding 11 must not intersect with the lead of first and second windings 5,6, because shield effectiveness can reduce.
This device also comprises the antenna 2 that is arranged on contiguous this device and the metal film between described antenna and the user.This film is made by the material with good electric conductivity, for example aluminium, copper, silver, gold or other metal and alloy with good electric conductivity.This film is not intended to surround antenna 2, but it will be as the reflector of the radiation of sending for antenna.This film also can comprise bright and a lacklustre side, wherein should bright face away from the user.Test shows comprises that the mobile phone of this film can provide further shielding for the user.
The invention still further relates to the method that is provided with according to screening arrangement of the present invention.This method makes it possible to confirm on the mobile phone for example/middle electromagnetic radiation is especially strong/and the position that has problems, subsequently screening arrangement according to the present invention is arranged on the described position of next-door neighbour, the result is that described radiation is transferred to antenna by the lead 7 that links to each other with second winding 6.As a result, the not only tailored radiation source of electromagnetic radiation shielding, and shielding becomes possibility from several electromagnetic radiation sources of described element.
The present invention has been described with reference to the drawings.Scope of the present invention is illustrated in the following claim, but it can not be thought to be subjected to the restriction of described claim, under the condition that does not depart from the object of the invention, can make various changes and modifications.
Claims (17)
1, a kind of shielding electronic components especially comprises the electronic component of transmitter, prevents the device of electromagnetic radiation, be characterised in that, it comprises quartzy and winding/spiral, and wherein this winding/spiral twines around this crystal, and wherein an end of this winding is close to the antenna extension of this electronic component.
2,, be characterised in that this winding/spiral is flat and dish type according to the device of claim 1.
3,, be characterised in that the lead of this winding/spiral has high conductivity according to the device of claim 1 or 2.
4,, be characterised in that the lead of this winding/spiral comprises the lead that two or more twine mutually according to the device of claim 1 or 2.
5, according to the device of any one claim of front, be characterised in that this winding/spiral comprises the additional winding that is provided with around this crystal, wherein this winding is open, and wherein the lead of this winding is the lead with ferromagnetic characteristic.
6,, be characterised in that this additional winding is roughly formed polygon according to the device of claim 5.
7,, be characterised in that this polygon is near circular triangle according to the device of claim 6.
8,, be characterised in that this crystal has the receptivity to electromagnetic radiation according to the device of any one claim of front.
9, device according to Claim 8 is characterised in that this crystal is quartzy, especially rock crystal, snow quartz or rose quartz.
10, according to the device of any one claim of front, be characterised in that when the antenna of this electronic component is arranged on the exterior antenna (2) in described device left side, this winding outwards twines around quartzy (8) counter-clockwise direction from the inboard, and an end (6) of this winding twines around the antenna clockwise direction of this device.
11, according to any one device in the claim 1 to 8, be characterised in that when described antenna (2) is arranged on the exterior antenna on this device right side, this winding outwards twines around quartzy (8) clockwise direction from the inboard, should twine around this antenna counter-clockwise direction around an end flat, the dish type winding of described crystal (8).
12, according to any one device in the claim 1 to 8, be characterised in that when this antenna (2) is arranged on the patch antenna in this device left side, first winding (5) outwards twines around quartzy (8) counter-clockwise direction from the inboard, and second winding (6) outwards twines around patch antenna (3) counter-clockwise direction from the inboard.
13, according to any one device in the claim 1 to 8, be characterised in that when this antenna (2) is arranged on the patch antenna on this device right side, first winding (5) outwards twines around quartzy (8) clockwise direction from the inboard, and second winding (6) outwards twines around patch antenna (3) clockwise direction from the inboard.
14,, be characterised in that it comprises to be arranged on metal film contiguous between this antenna and the user with this antenna (2) according to any one device in the claim 1 to 13.
15,, be characterised in that this metal film made by aluminium, copper, silver, gold or other metal and alloy with good electric conductivity according to the device of claim 14.
16, according to the device of claim 14 or 15, be characterised in that this metal film comprises a tarnish and a bright side, this bright side is away from the user.
17, the method for one or more devices according to any one claim in the claim 1 to 16 is set, is characterised in that
-confirm that on the surface of electronic component electromagnetic radiation surpasses one or more positions of predetermined value,
-will have quartzy winding flat, dish type to be arranged on this/these positions, and
-the antenna that makes an end of this winding be close to this electronic component extends.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/DK2003/000219 WO2004089053A1 (en) | 2003-04-04 | 2003-04-04 | Invention concerning the removal of radiation from mobile phones and other electrical/electronic appliances |
| DK03/00219 | 2003-04-04 | ||
| DKPA200301804 | 2003-12-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1768446A true CN1768446A (en) | 2006-05-03 |
Family
ID=33104000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200480008949.0A Pending CN1768446A (en) | 2003-04-04 | 2004-04-02 | A device for shielding electronic units including a transmitting/receiving equipment and especially for shielding mobile phones |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN1768446A (en) |
| AU (1) | AU2003226916A1 (en) |
| WO (1) | WO2004089053A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106134091A (en) * | 2014-02-21 | 2016-11-16 | 托拉斯技术世界迪拜多种商品中心 | Remedy signal generator |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7456793B2 (en) * | 2005-06-23 | 2008-11-25 | Motorola, Inc. | Electromagnetically transparent decorative metallic surface |
| US7242507B2 (en) * | 2005-08-17 | 2007-07-10 | Li-Hsien Yen | Electromagnetic wave absorptive film and its fabrication |
| UA89765C2 (en) * | 2006-06-19 | 2010-03-10 | Алексей Евгеньевич Волков | Device for protection against exposure to energy |
| UA90106C2 (en) * | 2006-10-16 | 2010-04-12 | Алексей Евгеньевич Волков | Device for the protection against electromagnetic emission |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU643244B2 (en) * | 1990-01-08 | 1993-11-11 | Toyo Communication Equipment Co., Ltd. | 4-wire fractional winding helical antenna and an antenna unit |
| JP2001036318A (en) * | 1999-06-22 | 2001-02-09 | Nomo Sogo Kagi Yugenkoshi | Electromagnetic radiation protecting device for portable telephone |
| DE20103737U1 (en) * | 2001-03-03 | 2001-06-07 | Gutzmann, Gerhard, 89278 Nersingen | Arrangement for reducing the influence of an electromagnetic field generating device on humans |
| US6576832B2 (en) * | 2001-03-07 | 2003-06-10 | Nokia Mobile Phones Ltd. | Electronic device molded cover having a releasable EMI shield |
-
2003
- 2003-04-04 AU AU2003226916A patent/AU2003226916A1/en not_active Abandoned
- 2003-04-04 WO PCT/DK2003/000219 patent/WO2004089053A1/en not_active Application Discontinuation
-
2004
- 2004-04-02 CN CN200480008949.0A patent/CN1768446A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106134091A (en) * | 2014-02-21 | 2016-11-16 | 托拉斯技术世界迪拜多种商品中心 | Remedy signal generator |
| US10103763B2 (en) | 2014-02-21 | 2018-10-16 | Trust Technology World Dmcc | Remedial signal generator |
| CN106134091B (en) * | 2014-02-21 | 2020-07-28 | 托拉斯技术世界迪拜多种商品中心 | Remedial signal generator |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003226916A1 (en) | 2004-10-25 |
| WO2004089053A1 (en) | 2004-10-14 |
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