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GB2536225A - Improvements in and relating to the suppression of electromagnetic interference caused by wireless mobile devices - Google Patents

Improvements in and relating to the suppression of electromagnetic interference caused by wireless mobile devices Download PDF

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Publication number
GB2536225A
GB2536225A GB1503933.2A GB201503933A GB2536225A GB 2536225 A GB2536225 A GB 2536225A GB 201503933 A GB201503933 A GB 201503933A GB 2536225 A GB2536225 A GB 2536225A
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GB
United Kingdom
Prior art keywords
component
interference
interference component
conference system
static
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB1503933.2A
Other versions
GB201503933D0 (en
Inventor
Hughes Ciara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pi Communication Ltd
Original Assignee
Pi Communication Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pi Communication Ltd filed Critical Pi Communication Ltd
Priority to GB1503933.2A priority Critical patent/GB2536225A/en
Publication of GB201503933D0 publication Critical patent/GB201503933D0/en
Publication of GB2536225A publication Critical patent/GB2536225A/en
Withdrawn legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47BTABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B21/00Tables or desks for office equipment, e.g. typewriters, keyboards
    • A47B21/04Tables or desks for office equipment, e.g. typewriters, keyboards characterised by means for holding or fastening typewriters or computer equipment
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47BTABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B21/00Tables or desks for office equipment, e.g. typewriters, keyboards
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05FSTATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
    • H05F3/00Carrying-off electrostatic charges
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00Screening of apparatus or components against electric or magnetic fields
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47BTABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B2200/00General construction of tables or desks
    • A47B2200/0066Workstations
    • A47B2200/0079Conference or video conference table

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

An audio and/or video conference system comprising multiple user stations 10, each station having a work surface 20 on which an anti-interference component 30 is mounted. The anti-interference component comprises an anti-static and/or electromagnetic shielding component suitable for receiving a wireless mobile device 28 such as a mobile phone or a tablet computer. Each user station is provided with one or more of a microphone, loudspeaker, camera or visual display unit. When a mobile device is placed on or in register with the anti-interference component, the effects of electromagnetic interference on the other system components are suppressed. The anti-interference component may be a mat, or may be incorporated in the support structure as an intermediate layer, or may be located under the support structure. The anti-static component may include an electrostatic shielding layer and one or more electrostatic dissipative layers and may be provided in an electrically non-conductive enclosure.

Description

Improvements in and relating to the Suppression of Electromagnetic Interference caused by Wireless Mobile Devices
Field of the Invention
The present invention relates to the suppression of interference, particularly electromagnetic interference, caused by wireless mobile devices. The invention relates particularly to systems, methods and apparatus for inhibiting the effects of electromagnetic interference caused by wireless mobile devices.
Background to the Invention
It is known that wireless mobile devices are a source of electromagnetic interference (EMI) that can impair the operation of other electrical or electronic systems and devices. One way to address this problem is to switch the mobile device off, or at least to disable its wireless capability, when in the vicinity of a device or system that is to be protected from EMI. Alternatively, the device or system to be protected can be provided with an EMI shield around it. However, these solutions are not always practical. For example, in an audio broadcast system of the type found at conferences, EMI can adversely affect the operation of the system and in particular the quality of the audio signals. It is unrealistic to expect all of the participants in the conference to disable their mobile devices, and is impractical to provide conventional EMI shielding for all components of the system that might be affected by EMI. It would be desirable therefore to provide an alternative system and device for inhibiting the effects of electromagnetic interference caused by wireless mobile devices, particularly in the context of audio broadcast systems.
Summary of the Invention
A first aspect of the invention provides an audio and/or video conference system comprising a plurality of user stations, each user station comprising: a support structure providing a work surface; and an anti-interference component comprising an electrostatic and/or electromagnetic shielding component, wherein the anti-interference component has an obverse face located in register with at least part of said work surface to define a region on said work surface suitable for receiving a wireless mobile device, wherein said system includes an audio system comprising at least one microphone and at least one loudspeaker and/or headphones interconnected by an audio network, and/or a video system comprising at least one video camera and at least one visual display unit interconnected by a video network, and wherein each user station is provided with any one or more of said at least one microphone, loudspeaker, camera, headphones or visual display unit.
Typically, each user station is provided with a respective microphone. Each user station may be provided with any one or more of said microphone, loudspeaker, camera, headphones or visual display unit on or otherwise associated with said work surface.
In preferred embodiments, said anti-interference component comprises said electrostatic and/or electromagnetic shielding component located in an electrically non-conductive enclosure. Preferably, said anti-static component comprises an electrostatic (or static) shielding layer and at least one electrostatic (or static) dissipative layer. The electrostatic shielding layer may be located between first and second electrostatic dissipative layers. Typically, said electrostatic shielding layer comprises a metallic layer, preferably an aluminium layer.
Said enclosure may comprise first and second layers of electrically non-conductive material between which the shielding component is located.
In typical embodiments, the anti-interference component is a substantially planar structure, and may for example take the form of a mat. Said anti-interference component may be located on top of said work surface, or be incorporated into said support structure, or located on the underside of said support structure.
A second aspect of the invention provides an anti-interference component for reducing electromagnetic interference, the component comprising: an anti-static component and/or an electromagnetic shielding component located in an electrically non-conductive enclosure.
A third aspect of the invention provides a user station comprising a support structure providing a work surface, the station further including an anti-interference component of the second aspect of the invention, the anti-interference component having an obverse face located in register with at least part of said work surface to define a region on said work surface suitable for receiving a wireless mobile device.
A fourth aspect of the invention provides a method of suppressing electromagnetic interference from a wireless mobile device, the method comprising placing said wireless mobile device on or in register with the obverse face of an anti-interference component that comprises an electrostatic and/or electromagnetic shielding component.
In preferred embodiments, narrowband EMI from mobile enabled devices is suppressed by the use of a static shielding material within or covered by a non-conductive substance.
Further advantageous aspects of the invention will be apparent to those ordinarily skilled in the art upon review of the following description of specific embodiments and with reference to the 40 accompanying drawings.
Brief Description of the Drawings
Embodiments of the invention are now described by way of example and with reference to the accompanying drawings which like numerals are used to denote like parts and in which: Figure 1 is a schematic view of a user station embodying one aspect of the invention and including an anti-interference component embodying another aspect of the invention; Figures 2A to 2D illustrate respective alternative ways in which anti-interference components 10 embodying the invention may be provided in or on a user station; Figure 3 is a schematic representation of conference accommodation including multiple instances of user stations and anti-inference components embodying the invention; and Figure 4 is a conference audio broadcast system embodying another aspect of the invention.
Detailed Description of the Drawings
Referring to Figure 1 of the drawings, there is shown, generally indicated as 10, a user station embodying one aspect of the invention. The user station 10 may for example be a workstation or any other station at which a user (not shown) may engage in one or more activities using and/or in the vicinity of one or more electrical or electronic devices. The station 10 may be an individual station (e.g. a stand-alone unit as illustrated) or may be part of an installation comprising multiple stations 10 (see Figure 3 by way of example). Typically, the station 10 is designed to be used by a seated user and so each station comprises a seat 24.
The station 10 typically includes one or more electrical or electronic devices, including but not limited to any one or more of a microphone 12, a loudspeaker 14, a computer 16, a visual display unit (shown as part of the computer 16 in the illustrated example but may alternatively be a stand-alone item) and headphones (not shown). The station 10 may also include one or more electrical cables 18 for carrying electrical power and/or data to and from the electrical/electronic devices as applicable. The station 10 includes a work surface 20, which may be provided by the upper surface of a desk, table, bench, shelf or other support structure depending on the type of station 10. For example, the station 10 illustrated in Figure 1 may comprise a desk 22 while in Figure 3 multiple stations 110 are provided spaced apart along an elongate bench or table 122.
Any one or more of the electrical/electronic devices associated with the station 10 may be integrated into the station 10, fixed to the station 10, or removable from the station (e.g. resting on the work surface 20) as is appropriate.
It is expected that the user possesses a wireless mobile device 28, for example a mobile (cellular) telephone or a tablet computer. In this context, the term "wireless mobile device" is intended to include any portable electronic or computing device that is enabled to communicate wirelessly via a cellular (or mobile) network (data and/or calls), and/or via any other wireless communications network including Local Area Networks (LANs) and/or Personal Area Networks (PANs). The mobile device 28 is typically kept close to the user, e.g. in the user's pocket or on the work surface 20. As such, unless it is switched off or has its wireless capability disabled, the mobile device 28 is a source of EMI, in particular narrowband EMI and usually of the type known as Radio-Frequency Interference (RFD), that can adversely affect the operation of the electrical/electronic devices 12, 14, 16 and 10 cables 18 associated with the station 10.
In order to eliminate or at least reduce the effects of EMI, the station 10 is provided with an anti-interference component 30. In typical embodiments, the anti-interference component 30 comprises an anti-static component 32, i.e. a component that acts as an electrostatic shield and/or as an electrostatic dissipator In this context, the term electrostatic shield is intended to embrace the terms "static shield" and "ESD shield", and the term electrostatic dissipator is intended to embrace "static dissipator" A preferred embodiment of the anti-interference component 30 is shown in Figure 5 and comprises an anti-static component 32, preferably provided in a non-conductive (electrically) enclosure 34.
The anti-static component 32 may comprise one or more layers. Any of the layers may be formed as a discrete layer or as a coating on another layer as is convenient. In the illustrated embodiment, the anti-static component 32 comprises multiple layers including an electrostatic (or static) shielding layer 36 and preferably one or more electrostatic (or static) dissipative layers 38, 40. Typically, the electrostatic shielding layer 36 is located between first and second electrostatic dissipative layers 38, 40. In some embodiments, the anti-static component 32 may be configured to provide electromagnetic shielding (for example by the inclusion of a conductive or magnetic layer, e.g. a layer of magnetic metal, as the shielding layer 36 or in addition to the electrostatic shielding layer 36). Typically, the electromagnetic shielding is provided in addition to the electrostatic shielding. In alternative embodiments, anti-static component 32 is replaced by an electromagnetic shielding component, which may or may not also be configured to provide electrostatic shielding and/or electrostatic dissipation.
The electrostatic shielding layer 36 is typically a metallic layer, for example comprising a layer of metal, typically a non-magnetic metal, e.g. aluminium. In any event the layer 36 is typically made from a material having electrostatic shielding properties, preferably with a sheet resistance in the static shielding range, which is typically in the order of approximately 1 to 103 ohms per square, or less. For example, the layer 36 may have a sheet resistance of less than 1500 ohms per square, preferably approximately 1000 ohms per square.
The electrostatic dissipative layers 38, 40 are formed from material having electrostatic dissipating properties, preferably with a sheet resistance in the static dissipative range, which is typically in the order of approximately 106 to 106 ohms per square. The electrostatic dissipative layers 38, 40 are typically formed from a polymeric material (not necessarily the same material for each layer), for example polyethylene. Optionally, a polyester layer 42 is provided, typically between the metallic layer 36 and the electrostatic dissipative layer 40.
The enclosure 34 typically comprises first and second layers 34A, 34B of electrically non-conductive material between which the anti-static component 32 is located. Non-conductive material may also be provided over the sides and/or ends of the anti-static component 32 for example such that it is completely enclosed by non-conductive material. Any suitable non-conductive material may be used, for example a non-conductive polymeric material e.g. non-conductive PVC. Suitable nonconductive materials typically have a sheet resistance in the order of at least 105 ohms per square, usually higher, e.g. in excess of 109, preferably in excess of 1013 ohms per square.
The layers of the anti-interference component 30 may be combined using any suitable conventional manufacturing technique, e.g. coating, depositing, bonding or fixing.
In typical embodiments, the anti-interference component 30 is a substantially planar structure. It has an obverse face 44 preferably with an area at least as large as the area of a typical mobile device 28, e.g. approximately between 0.005 m2 and 0.15 m2. In one embodiment, the anti-interference component 30 takes the form of a mat, as illustrated in Figures 1 and 2A, which may be located on the work surface 20. Alternatively, the anti-interference component 30 may be provided as the upper surface of the desk 22 (or other support structure), i.e. such that the obverse face 44 of the anti-interference component 30 provides the work surface 20, as illustrated in Figure 2B. Alternatively still, the anti-interference component 30 may be provided as an inner layer of the desk 22 (or other support structure), as illustrated in Figure 2C, or on the underside of the desk 22 (or other support structure), as illustrated in Figure 2D. In any case, the component 30 may be shaped and dimensioned to cover, or otherwise be in register with, all or part of the work surface 20.
In any case, the obverse face 44 of the anti-interference component 30 defines an anti-interference region for receiving the mobile device 28, the region either being provided by the obverse face 44 itself (e.g. in the embodiments shown in Figures 2A and 2B), or being in register with the obverse face (e.g. in the embodiments shown in Figures 2C and 2D), the region typically being provided on the work surface 20. In any of the embodiments shown in Figures 2A to 2B, the anti-interference component 30 has the effect of suppressing interference, especially EMI/RFI, in particular narrowband EMI, generated by a mobile device 28 located on or in register with the component 30. In addition, the anti-interference component 30, especially in the embodiments of Figures 2C and 2D, may have the effect of shielding cables and/or other electrical/electronic devices located below (or otherwise beyond the component 30 with respect to the source of EMI/RFI) the component 30, e.g. below the desk 22 or other support structure from EMURFI, including that caused by a mobile device 28.
In use, the mobile device 28 is placed on the anti-interference region, i.e. on or in register with the 5 obverse face 44. It is found that this eliminates or reduces the effects of EMI, in particular narrowband EMI/RFI, on the electrical/electronic devices 12, 14, 16 and cables 18 associated with the station 10 that would otherwise have been caused by wireless activity of the mobile device 28. The anti-interference component 30 may be used in a wide variety of applications including but not limited to: adjacent microphones (primarily table top); with audio/video conferencing equipment; 10 adjacent integrated or stand-alone speakers; at office workstations; at home computer desks; in recording studios; at audio mixing desks / PA console Mixing Desks; at radio/television production consoles.
The present invention is particularly, but not exclusively, suited for use in an audio and/or video conference system. Figure 3 illustrates typical conference accommodation 148 comprising multiple user stations 110 each of which may be the same or similar to the user station 10 described above. In particular, each station 110 includes an anti-interference component 130 embodying the present invention. The stations 110 are spaced apart on benches 122 by way of example but may alternatively be provided by a respective desk. Typically, each station 110 includes at least a microphone 112 and/or a loudspeaker 114. Each station 110 may include a video camera and/or a video display unit (not shown). Alternatively, one or more conference video cameras may provide video feed to a respective video display unit at each station 110.
Figure 4 illustrates an example of an audio and video conference system 150 suitable for use with the conference accommodation 148. The preferred system 150 includes a respective microphone 112 for each station 110, the microphones 112 being connected to a broadcasting system 152 typically via one or more audio routers 154. One or more loudspeakers 114 are connected to the broadcasting system 152, typically via one or more audio routers 156. Optionally, a respective loudspeaker 114 is provided at at least some and optionally all of the stations 110. The connections 118 may be wired and/or wireless as convenient. The system 150 further includes one or more video cameras 158 connected to the broadcasting system 152 typically via one or more video routers 160. Optionally, a respective video camera 158 is provided at at least some and optionally all of the stations 110. One or more video display units 162 are connected to the broadcasting system 152, typically via one or more video routers 164. Optionally, a respective video display unit 162 is provided at at least some and optionally all of the stations 110. The connections 118 may be wired and/or wireless as convenient. In alternative embodiments the system 150 may be audio only or video only, as required. More generally, the microphones and loudspeakers form part of an audio system and are interconnected by an audio network that includes cables 118, the video cameras and VDUs form part of a video system and are interconnected by a video network that includes the respective cabling 118.
Each station 110 includes either an individual an anti-interference component 130' or part of a shared anti-interference component 130" providing a respective anti-interference region for receiving the respective user's mobile device 28. One or more other anti-inference components 230 may be provided over or under some or all of the cabling 118 interconnecting the system components. For example, the anti-inference component(s) 230 may be provided on the underside of one or more of the benches 122. In use, the respective mobile device 28 is placed on the respective anti-interference region, i.e. on or in register with the obverse face 144 of the respective anti-interference component 130', 130". It is found that this eliminates or reduces the effects of EMI on the audio/video conference system 150, in particular the electrical/electronic components located at the respective station 110 that would otherwise have been caused by wireless activity of the mobile device 28. Similarly the, or each, anti-interference component 230 eliminates or reduces the effects of EMI on the cabling 118.
The embodiment illustrated in Figures 3 and 4 is suitable for use in any conference accommodation including, but not limited to, parliamentary chambers, committee rooms and council chambers, courtrooms, boardrooms and conference centres, in any of which embodiments of the invention may be applied to a variety of surfaces to reduce/negate interference from EMI/RFI across audio systems encompassing numerous microphones and speakers, and significant lengths of metres of cabling.
By way of example an anti-interference component 30, 130, 230 embodying the invention, and more particularly the anti-static component 32, may exhibit the following static shielding and related properties: * Surface Resistivity / Resistance ASTM D257 or ANSI/ESD STM11.11 * Interior <1012 ohms/square or <1011 ohms * Exterior <1012 ohms/square or <1011 ohms * Metal 100 ohms * Static Shielding < 30 volts EIA 541 * Static Shielding < 10 nJ ANSI/ESD STM11.31 * Static Decay < 2 seconds MIL-STD-3010 4046 * Charge Generation * PTFE 0.09 nC/sq.in. Modified Inclined Plane * Quartz 0.01 nC/sq.in.
It will be understood that anti-interference components embodying the invention can be applied in numerous ways to achieve the effect of reduction/negation of EMI/RFI in scenarios in which mobile 35 devices, microphones and speakers (and/or other electrical/electronic devices) are in close proximity, and in particular where EMI/RFI would otherwise adversely affect audio signals.
The invention is not limited to the embodiment(s) described herein but can be amended or modified without departing from the scope of the present invention.

Claims (25)

  1. CLAIMS: 1. An audio and/or video conference system comprising a plurality of user stations, each user station comprising: a support structure providing a work surface; and an anti-interference component comprising an anti-static and/or electromagnetic shielding component, wherein the anti-interference component has an obverse face located in register with at least part of said work surface to define a region on said work surface suitable for receiving a wireless mobile device, wherein said system includes an audio system comprising at least one microphone and at least one loudspeaker and/or headphones interconnected by an audio network, and/or a video system comprising at least one video camera and at least one visual display unit interconnected by a video network, and wherein each user station is provided with any one or more of said at least one microphone, loudspeaker, headphones, camera or visual display unit.
  2. 2. The conference system of claim 1, wherein each user station is provided with a respective microphone.
  3. 3. The conference system of claim 1 or 2, wherein each user station is provided with any one or more of said microphone, loudspeaker, camera, headphones or visual display unit, for example on or associated with said work surface.
  4. 4. The conference system of any preceding claim, wherein said anti-interference component 25 comprises said anti-static and/or electromagnetic shielding component located in an electrically nonconductive enclosure.
  5. 5. The conference system of any preceding claim, wherein said anti-interference component comprises an anti-static component comprising an electrostatic shielding layer and/or at least one 30 electrostatic dissipative layer.
  6. 6. The conference system of claim 5, wherein the anti-static component comprises an electrostatic shielding layer located between first and second electrostatic dissipative layers.
  7. 7. The conference system of claim 5 or 6, wherein said electrostatic shielding layer comprises a metallic layer, preferably an aluminium layer.
  8. 8. The conference system of any one of claims 4 to 7, wherein said enclosure comprises first and second layers of electrically non-conductive material between which the shielding component is 40 located.
  9. 9. The conference system of any preceding claim, wherein the anti-interference component is a substantially planar structure.
  10. 10. The conference system of any preceding claim, wherein said anti-interference component is 5 located on top of said work surface.
  11. 11. The conference system of claim 10, wherein said anti-interference component is a mat.
  12. 12. The conference system of any preceding claim wherein said anti-interference component is 10 incorporated into said support structure.
  13. 13. The conference system of claim 12, wherein said support structure is a multi-layered structure, said anti-interference component comprising an intermediate one of said layers.
  14. 14. The conference system of any preceding claim, wherein said anti-interference component is located on the underside of said support structure.
  15. 15. An anti-interference component for reducing electromagnetic interference, the component comprising: an anti-static component and/or electromagnetic shielding component located in an 20 electrically non-conductive enclosure.
  16. 16. The component of claim 15, wherein said anti-static component comprises an electrostatic shielding layer and/or at least one electrostatic dissipative layer.
  17. 17. The component of claim 16, wherein the electrostatic shielding layer is located between first and second electrostatic dissipative layers.
  18. 18. The component of any one of claims 15 to 17, wherein said enclosure comprises first and second layers of electrically non-conductive material between which the shielding component is 30 located.
  19. 19. The component of any one of claims 15 to 18, wherein the anti-interference component is a substantially planar structure.
  20. 20. A user station comprising a support structure providing a work surface, the station further including an anti-interference component comprising an anti-static and/or electromagnetic shielding component, the anti-interference component having an obverse face located in register with at least part of said work surface to define a region on said work surface suitable for receiving a wireless mobile device.
  21. 21. The user station of claim 20, wherein said anti-interference component is located on top of said work surface.
  22. 22. The user station of claim 21, wherein said anti-interference component is a mat. 5
  23. 23. The user station of claim 20 or 21, wherein said anti-interference component is incorporated into said support structure.
  24. 24. The user station of claim 23, wherein said support structure is a multi-layered structure, said anti-10 interference component comprising an intermediate one of said layers.
  25. 25. The user station of claim 20, 22, 23 or 24, wherein said anti-interference component is located on the underside of said support structure.25. A method of suppressing interference, especially electromagnetic interference, from a wireless mobile device, the method comprising placing said wireless mobile device on or in register with the obverse face of an anti-interference component that comprises an anti-static and/or electromagnetic shielding component.
GB1503933.2A 2015-03-09 2015-03-09 Improvements in and relating to the suppression of electromagnetic interference caused by wireless mobile devices Withdrawn GB2536225A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1503933.2A GB2536225A (en) 2015-03-09 2015-03-09 Improvements in and relating to the suppression of electromagnetic interference caused by wireless mobile devices

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Application Number Priority Date Filing Date Title
GB1503933.2A GB2536225A (en) 2015-03-09 2015-03-09 Improvements in and relating to the suppression of electromagnetic interference caused by wireless mobile devices

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GB2536225A true GB2536225A (en) 2016-09-14

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6276113A (en) * 1985-09-28 1987-04-08 ニッタ株式会社 Conductive sheet
DE10064540A1 (en) * 2000-12-22 2002-07-04 Mauser Office Gmbh Holder for mobile telephone in office furniture has screen layer on inner side of cover panel to protect from electromagnetic fields
JP2004138833A (en) * 2002-10-17 2004-05-13 Masatoshi Shimano Slip prevention sticker with electromagnetic wave control function
US20110250849A1 (en) * 1996-02-20 2011-10-13 Crowley Robert J Radiative focal area antenna transmission coupling arrangement
CN202640916U (en) * 2012-04-25 2013-01-02 卫利净化产品(上海)有限公司 Semi-transparent super clean anti-static shielding film
CN202820217U (en) * 2012-09-19 2013-03-27 武汉工程大学 Conference table with mobile phone shielding function
US20130153795A1 (en) * 2011-12-14 2013-06-20 Daniel T. DeBaun Body shield for thermal and electrical radiation
DE102012104177A1 (en) * 2012-05-14 2013-11-14 Alexander Steinke Device e.g. desk pad, for dissipating electric charge of e.g. mobile telephone, has electrically conductive layer formed of electrically and/or magnetically conductive material net with electromagnetic radiation shielding patterns

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6276113A (en) * 1985-09-28 1987-04-08 ニッタ株式会社 Conductive sheet
US20110250849A1 (en) * 1996-02-20 2011-10-13 Crowley Robert J Radiative focal area antenna transmission coupling arrangement
DE10064540A1 (en) * 2000-12-22 2002-07-04 Mauser Office Gmbh Holder for mobile telephone in office furniture has screen layer on inner side of cover panel to protect from electromagnetic fields
JP2004138833A (en) * 2002-10-17 2004-05-13 Masatoshi Shimano Slip prevention sticker with electromagnetic wave control function
US20130153795A1 (en) * 2011-12-14 2013-06-20 Daniel T. DeBaun Body shield for thermal and electrical radiation
CN202640916U (en) * 2012-04-25 2013-01-02 卫利净化产品(上海)有限公司 Semi-transparent super clean anti-static shielding film
DE102012104177A1 (en) * 2012-05-14 2013-11-14 Alexander Steinke Device e.g. desk pad, for dissipating electric charge of e.g. mobile telephone, has electrically conductive layer formed of electrically and/or magnetically conductive material net with electromagnetic radiation shielding patterns
CN202820217U (en) * 2012-09-19 2013-03-27 武汉工程大学 Conference table with mobile phone shielding function

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