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WO1999003167A1 - Telephone portable dote d'un dispositif d'absorption des rayonnements - Google Patents

Telephone portable dote d'un dispositif d'absorption des rayonnements Download PDF

Info

Publication number
WO1999003167A1
WO1999003167A1 PCT/SE1998/001272 SE9801272W WO9903167A1 WO 1999003167 A1 WO1999003167 A1 WO 1999003167A1 SE 9801272 W SE9801272 W SE 9801272W WO 9903167 A1 WO9903167 A1 WO 9903167A1
Authority
WO
WIPO (PCT)
Prior art keywords
telephone
resistive layer
casing
electrically resistive
square
Prior art date
Application number
PCT/SE1998/001272
Other languages
English (en)
Inventor
Karl Gunnar Filipsson
Original Assignee
Allgon Ab
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 Allgon Ab filed Critical Allgon Ab
Priority to EP98934013A priority Critical patent/EP0995232A1/fr
Priority to JP2000502555A priority patent/JP2001510289A/ja
Priority to AU83621/98A priority patent/AU8362198A/en
Priority to KR1020007000158A priority patent/KR100579787B1/ko
Publication of WO1999003167A1 publication Critical patent/WO1999003167A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • 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
    • 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
    • H01Q1/243—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 built-in antennas
    • 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
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H01Q17/001—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems for modifying the directional characteristic of an aerial

Definitions

  • the present invention relates to a hand-portable telephone, including a casing, an antenna device with at least one radia- ting element, and a protective device for absorbing a substantial part of the electromagnetic energy being radiated from said at least one radiating element towards a human body portion during use of the telephone.
  • Such protective devices are generally known. Normally, the protective devices are disposed in the vicinity of an antenna rod being extendable from the telephone casing.
  • a protective device is disclosed, which comprises a shielding means located inside the casing so as to reflect and/or absorb any electromagnetic radiation generated by the components inside the telephone casing.
  • the reflecting material is said to be aluminium, other metal, polymer or other suitable material, whereas the absorbing material is said to be lead or some other suitable material. It is mentioned that a material such as lead will present a relatively dense block to the passage of electromagnetic radiation.
  • the main object of the present invention is to provide a hand- portable telephone with a more effective protective device, which will absorb a significant part of the microwave energy being radiated towards the head or some other body portion of the user of the telephone.
  • a protective device comprising an electrically resistive layer, which is disposed at a distance from the radiating element adjacent to a part of the casing being designed to be held adjacent to the human body portion, said electrically resistive layer having a surface resistance of at least 25 ⁇ /square.
  • the present invention does not provide a metallic, electrically conductive material serving as a reflector or shielding device. Rather, the inventive concept is to absorb a significant part of the radiation being directed towards the particular human body portion and to transfer the radiation into heat. In hand- portable telephones, the power fed into the radiating element is moderate, and the generated heat will therefore be kept at a relatively low level.
  • the surface resistance of the resistive layer should be 25-800 ⁇ /square, in particular 150-250 ⁇ /square.
  • an electrically conducting polymer material such as polypyrrole.
  • Such materials are also commercially available, e.g. under the registered trademark CONTEX from Milliken & Co.
  • the electrically resistive layer may be disposed on a support structure mounted inside the casing or it may be disposed on at least one wall defining the casing.
  • Fig. 1 illustrates schematically, in a perspective view, a cellular telephone casing with an antenna device mounted on a support structure, the rear part of the casing being taken away for clarity;
  • Fig. 2 shows, likewise in a perspective view, the antenna device and a support structure
  • Fig. 3 illustrates, to a larger scale, the antenna device and its support structure with a protective device according to the invention.
  • the casing 1 of the telephone is generally elongated and boxlike with a rectangular front wall 2, side walls 3 and 4 and end walls 5 and 6.
  • an antenna device 7 mounted on a transverse support bar 8 and including two meander- configured radiating elements 7a and 7b, connected to a common feed point 7c. See also fig. 3.
  • the antenna device is preferably of the kind disclosed in the co-pending patent application entitled “Compact antenna device” filed on the same day by the same applicant. The contents of said co-pending application is incorporated herein by reference.
  • the meander elements 7a, 7b when being fed by microwave energy, will emit electromagnetic microwave radiation in virtually all directions.
  • the cellular telephone can communicate by way of microwave signals to and from a base station irrespective of the orientation of the telephone casing.
  • an electrically resistive layer 9 (fig. 3) which is disposed at a distance from the radiating element 7 adjacent to the front wall 2 of the casing being designed to be held adjacent to the head of the user.
  • the resistive layer consists of an extremely thin aluminium film deposited on a plastic substrate, the thickness of the aluminium film being only about lOnm. Such materials are commercially available.
  • the surface resistance of the layer 9 should be at least 25 ⁇ /square, and not exceeding 800 ⁇ /square, preferably between 150 and 250 ⁇ /square.
  • the supporting bar 8 may be constituted by a hollow thermoplas- tive material or a foam material, such as Rohacell.
  • the electrically resistive layer will be confined only to the relatively small area underneath the antenna device 7. Normally, such a limited extension of the resistive layer is sufficient to obtain the desired result of absorbing a major portion of the microwave radiation directed towards a user's head. However, it is of course possible to extend the resistive layer to the total area of the bottom wall 2, or only a part thereof, where radiation is dominant.
  • One possibility is to apply the layer onto a printed circuit card 10 carrying the support bar 8 and the antenna device 7 and dimensioned to be fitted into the casing 2, as shown in fig. 2.
  • the electrically resistive layer can also be dis- posed directly onto one or more of the walls of the casing, e.g. on the inside, the outside or as an integrated part of the wall.
  • the layer may comprise two or more sub-layers provided that the combined surface resistance is at least 25 ⁇ /square so as to effectively convert a significant part of the impinging radiation into heat.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephone Set Structure (AREA)
  • Support Of Aerials (AREA)
  • Details Of Aerials (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

L'invention concerne un téléphone portable comprenant un boîtier (1), un dispositif antenne (7) doté au moins d'un élément rayonnant (7a, 7b) placé dans le boîtier, et un dispositif protecteur permettant d'absorber une grande partie de l'énergie électromagnétique qui est émise par rayonnement en direction de la tête ou d'une autre partie du corps de l'utilisateur. Le dispositif comprend une couche électriquement résistante (9) d'une résistance superficielle d'au moins 25Φ/carré.
PCT/SE1998/001272 1997-07-09 1998-06-26 Telephone portable dote d'un dispositif d'absorption des rayonnements WO1999003167A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP98934013A EP0995232A1 (fr) 1997-07-09 1998-06-26 Telephone portable dote d'un dispositif d'absorption des rayonnements
JP2000502555A JP2001510289A (ja) 1997-07-09 1998-06-26 放射吸収装置を備えた携帯電話機
AU83621/98A AU8362198A (en) 1997-07-09 1998-06-26 Hand-portable telephone with radiation absorbing device
KR1020007000158A KR100579787B1 (ko) 1997-07-09 1998-06-26 방사 흡수장치를 갖춘 휴대용 전화기

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9702660-3 1997-07-09
SE9702660A SE9702660L (sv) 1997-07-09 1997-07-09 Handportabel telefon med strålningsabsorberande anordning

Publications (1)

Publication Number Publication Date
WO1999003167A1 true WO1999003167A1 (fr) 1999-01-21

Family

ID=20407706

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1998/001272 WO1999003167A1 (fr) 1997-07-09 1998-06-26 Telephone portable dote d'un dispositif d'absorption des rayonnements

Country Status (7)

Country Link
EP (1) EP0995232A1 (fr)
JP (1) JP2001510289A (fr)
KR (1) KR100579787B1 (fr)
CN (1) CN1118950C (fr)
AU (1) AU8362198A (fr)
SE (1) SE9702660L (fr)
WO (1) WO1999003167A1 (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1152480A3 (fr) * 2000-04-19 2002-07-17 Nissi Telecom Co., Ltd. Atténuateurs d'ondes électromagnétiques pour utilisation dans les téléphones portables
US6870507B2 (en) 2001-02-07 2005-03-22 Fractus S.A. Miniature broadband ring-like microstrip patch antenna
US6876320B2 (en) 2001-11-30 2005-04-05 Fractus, S.A. Anti-radar space-filling and/or multilevel chaff dispersers
US6937191B2 (en) 1999-10-26 2005-08-30 Fractus, S.A. Interlaced multiband antenna arrays
US6937206B2 (en) 2001-04-16 2005-08-30 Fractus, S.A. Dual-band dual-polarized antenna array
US7015868B2 (en) 1999-09-20 2006-03-21 Fractus, S.A. Multilevel Antennae
US7148850B2 (en) 2000-01-19 2006-12-12 Fractus, S.A. Space-filling miniature antennas
US7202818B2 (en) 2001-10-16 2007-04-10 Fractus, S.A. Multifrequency microstrip patch antenna with parasitic coupled elements
US7215287B2 (en) 2001-10-16 2007-05-08 Fractus S.A. Multiband antenna
US7245196B1 (en) 2000-01-19 2007-07-17 Fractus, S.A. Fractal and space-filling transmission lines, resonators, filters and passive network elements
US7312762B2 (en) 2001-10-16 2007-12-25 Fractus, S.A. Loaded antenna
US7511675B2 (en) 2000-10-26 2009-03-31 Advanced Automotive Antennas, S.L. Antenna system for a motor vehicle
US8749436B2 (en) 2010-03-26 2014-06-10 Kyocera Corporation Mobile wireless device
CN103962483A (zh) * 2014-04-24 2014-08-06 安徽工业大学 一种火车轮立式轧制异步强化变形方法及装置
US9099773B2 (en) 2006-07-18 2015-08-04 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US9755314B2 (en) 2001-10-16 2017-09-05 Fractus S.A. Loaded antenna

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1960041A1 (de) * 1969-05-12 1970-11-19 Jean Chretin Vorrichtung zum Festhalten des Stramins waehrend der Teppichfertigung
EP0588271A1 (fr) * 1992-09-18 1994-03-23 ALCATEL ITALIA S.p.A. Radio émetteur-récepteur portable à faible irradiation électromagnétique de l'utilisateur et comportant une antenne ayant un diagramme de rayonnement asymétrique
US5335366A (en) * 1993-02-01 1994-08-02 Daniels John J Radiation shielding apparatus for a radio transmitting device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2699773A1 (fr) * 1992-12-17 1994-06-24 Alsthom Cge Alcatel Emetteur radio portable.
WO1997036380A1 (fr) * 1996-03-26 1997-10-02 Euroconcept 2000 Limited Blindage pour un equipement radio

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1960041A1 (de) * 1969-05-12 1970-11-19 Jean Chretin Vorrichtung zum Festhalten des Stramins waehrend der Teppichfertigung
EP0588271A1 (fr) * 1992-09-18 1994-03-23 ALCATEL ITALIA S.p.A. Radio émetteur-récepteur portable à faible irradiation électromagnétique de l'utilisateur et comportant une antenne ayant un diagramme de rayonnement asymétrique
US5335366A (en) * 1993-02-01 1994-08-02 Daniels John J Radiation shielding apparatus for a radio transmitting device

Cited By (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9240632B2 (en) 1999-09-20 2016-01-19 Fractus, S.A. Multilevel antennae
US9000985B2 (en) 1999-09-20 2015-04-07 Fractus, S.A. Multilevel antennae
US7505007B2 (en) 1999-09-20 2009-03-17 Fractus, S.A. Multi-level antennae
US9054421B2 (en) 1999-09-20 2015-06-09 Fractus, S.A. Multilevel antennae
US9761934B2 (en) 1999-09-20 2017-09-12 Fractus, S.A. Multilevel antennae
US7015868B2 (en) 1999-09-20 2006-03-21 Fractus, S.A. Multilevel Antennae
US7123208B2 (en) 1999-09-20 2006-10-17 Fractus, S.A. Multilevel antennae
US9362617B2 (en) 1999-09-20 2016-06-07 Fractus, S.A. Multilevel antennae
US10056682B2 (en) 1999-09-20 2018-08-21 Fractus, S.A. Multilevel antennae
US7528782B2 (en) 1999-09-20 2009-05-05 Fractus, S.A. Multilevel antennae
US7397431B2 (en) 1999-09-20 2008-07-08 Fractus, S.A. Multilevel antennae
US8976069B2 (en) 1999-09-20 2015-03-10 Fractus, S.A. Multilevel antennae
US7394432B2 (en) 1999-09-20 2008-07-01 Fractus, S.A. Multilevel antenna
US8941541B2 (en) 1999-09-20 2015-01-27 Fractus, S.A. Multilevel antennae
US7250918B2 (en) 1999-10-26 2007-07-31 Fractus, S.A. Interlaced multiband antenna arrays
US6937191B2 (en) 1999-10-26 2005-08-30 Fractus, S.A. Interlaced multiband antenna arrays
US8896493B2 (en) 1999-10-26 2014-11-25 Fractus, S.A. Interlaced multiband antenna arrays
US9905940B2 (en) 1999-10-26 2018-02-27 Fractus, S.A. Interlaced multiband antenna arrays
US7557768B2 (en) 1999-10-26 2009-07-07 Fractus, S.A. Interlaced multiband antenna arrays
US7554490B2 (en) 2000-01-19 2009-06-30 Fractus, S.A. Space-filling miniature antennas
US7202822B2 (en) 2000-01-19 2007-04-10 Fractus, S.A. Space-filling miniature antennas
US10355346B2 (en) 2000-01-19 2019-07-16 Fractus, S.A. Space-filling miniature antennas
US7538641B2 (en) 2000-01-19 2009-05-26 Fractus, S.A. Fractal and space-filling transmission lines, resonators, filters and passive network elements
US7148850B2 (en) 2000-01-19 2006-12-12 Fractus, S.A. Space-filling miniature antennas
US7245196B1 (en) 2000-01-19 2007-07-17 Fractus, S.A. Fractal and space-filling transmission lines, resonators, filters and passive network elements
US9331382B2 (en) 2000-01-19 2016-05-03 Fractus, S.A. Space-filling miniature antennas
EP1152480A3 (fr) * 2000-04-19 2002-07-17 Nissi Telecom Co., Ltd. Atténuateurs d'ondes électromagnétiques pour utilisation dans les téléphones portables
US7511675B2 (en) 2000-10-26 2009-03-31 Advanced Automotive Antennas, S.L. Antenna system for a motor vehicle
US6870507B2 (en) 2001-02-07 2005-03-22 Fractus S.A. Miniature broadband ring-like microstrip patch antenna
US6937206B2 (en) 2001-04-16 2005-08-30 Fractus, S.A. Dual-band dual-polarized antenna array
US7439923B2 (en) 2001-10-16 2008-10-21 Fractus, S.A. Multiband antenna
US7541997B2 (en) 2001-10-16 2009-06-02 Fractus, S.A. Loaded antenna
US7202818B2 (en) 2001-10-16 2007-04-10 Fractus, S.A. Multifrequency microstrip patch antenna with parasitic coupled elements
US7215287B2 (en) 2001-10-16 2007-05-08 Fractus S.A. Multiband antenna
US7312762B2 (en) 2001-10-16 2007-12-25 Fractus, S.A. Loaded antenna
US9755314B2 (en) 2001-10-16 2017-09-05 Fractus S.A. Loaded antenna
US6876320B2 (en) 2001-11-30 2005-04-05 Fractus, S.A. Anti-radar space-filling and/or multilevel chaff dispersers
US9899727B2 (en) 2006-07-18 2018-02-20 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US9099773B2 (en) 2006-07-18 2015-08-04 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US10644380B2 (en) 2006-07-18 2020-05-05 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US11031677B2 (en) 2006-07-18 2021-06-08 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US11349200B2 (en) 2006-07-18 2022-05-31 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US11735810B2 (en) 2006-07-18 2023-08-22 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US12095149B2 (en) 2006-07-18 2024-09-17 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US8749436B2 (en) 2010-03-26 2014-06-10 Kyocera Corporation Mobile wireless device
CN103962483A (zh) * 2014-04-24 2014-08-06 安徽工业大学 一种火车轮立式轧制异步强化变形方法及装置

Also Published As

Publication number Publication date
CN1118950C (zh) 2003-08-20
KR20010021600A (ko) 2001-03-15
KR100579787B1 (ko) 2006-05-15
CN1262792A (zh) 2000-08-09
SE9702660D0 (sv) 1997-07-09
JP2001510289A (ja) 2001-07-31
EP0995232A1 (fr) 2000-04-26
SE509232C2 (sv) 1998-12-21
AU8362198A (en) 1999-02-08
SE9702660L (sv) 1998-12-21

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