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WO2003034537A1 - Appareil radiotelephonique mobile comprenant un element de correction reduisant la valeur de das (debit d'absorption specifique) - Google Patents

Appareil radiotelephonique mobile comprenant un element de correction reduisant la valeur de das (debit d'absorption specifique) Download PDF

Info

Publication number
WO2003034537A1
WO2003034537A1 PCT/DE2002/003813 DE0203813W WO03034537A1 WO 2003034537 A1 WO2003034537 A1 WO 2003034537A1 DE 0203813 W DE0203813 W DE 0203813W WO 03034537 A1 WO03034537 A1 WO 03034537A1
Authority
WO
WIPO (PCT)
Prior art keywords
mobile radio
keyboard
absorption rate
mobile radiotelephone
specific absorption
Prior art date
Application number
PCT/DE2002/003813
Other languages
German (de)
English (en)
Inventor
Thorsten Kowalski
Stefan Huber
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP02774449A priority Critical patent/EP1435124A1/fr
Publication of WO2003034537A1 publication Critical patent/WO2003034537A1/fr

Links

Classifications

    • 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
    • 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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/526—Electromagnetic shields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/002—Materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/024—Properties of the substrate
    • H01H2209/026—Properties of the substrate metallic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2231/00—Applications
    • H01H2231/022—Telephone handset
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/004—High frequency adaptation or shielding

Definitions

  • the present invention relates to a mobile radio device, in particular a mobile radio telephone, with a housing and a keyboard provided in the top of the housing, which extends essentially in the area of the center of the device.
  • SAR Specific Absorption Rate
  • This value indicates the specific absorption rate in watts per kilogram, with which a given tissue volume range, e.g. B. is thermally stressed in the head of the respective user of the mobile device.
  • One type of protective measure is e.g. B. is known from EP 0 603 081 AI, in which an electro-magnetically absorbing shielding plate is housed between the most radiating zone of the mobile radio telephone and the head of the respective user as a kind of radiation-blocking partition in the housing of the mobile radio telephone.
  • a protective measure requires an additional element or several additional elements, which makes the manufacture of the mobile radio device more complicated and expensive.
  • the object of the present invention is to provide a mobile radio device of the type mentioned at the beginning, in which there is adequate protection against electrical without additional components. magnetic radiation is given to the respective user.
  • the keyboard has, inter alia, a keyboard mat which consists of an electrically conductive and / or magnetically and / or dielectrically active material.
  • This type of protective measure is therefore very effective for reducing the exposure dose to electromagnetic radiation, since the location of the strongest radiation of the electromagnetic field and thus the cause of a high SAR value in the current length of the mobile radio devices, which are likely to remain in the future is located in the area of the center of the device on the device board, which acts as the opposite pole to the actual antenna.
  • the energy radiated into the human tissue can be reduced on the one hand and the performance of the antenna can be improved or kept constant by reflection.
  • the SAR value can be easily reduced.
  • the figure shows a perspective exploded view of a mobile radio device in which the invention is used.
  • the mobile phone consists essentially of the upper shell 1 and the lower shell 2, wherein there is a battery compartment for the battery 3 in the lower shell 2 and the battery compartment is closed by means of the cover 4.
  • the cover 4 In the upper shell there is, among other things, the display with the display cover 5 and the keyboard 6.
  • a component of the keyboard 6 is the keyboard mat 7.
  • This keyboard mat 7 extends at least partially in the area of the center of the device and additionally serves to reduce the exposure dose to electromagnetic radiation for the respective user whose head is on the keyboard and display side of the mobile radio telephone when using the mobile radio telephone.
  • the location with the greatest electromagnetic radiation is located on the board below the keyboard mat 7, so that the keyboard mat 7 is located between the head of the user and the location with the greatest electromagnetic radiation from the mobile radio telephone.
  • this keyboard mat is now either made of an electrically conductive material and / or a magnetically active and / or a dielectric material. posed.
  • the radiated energy ie the energy radiated into the tissue of the user's head, is considerably reduced.
  • the magnetic materials prefferably have a relative permeability ⁇ r which is greater than 1 and for the dielectrically active materials to have a relative dielectric constant ⁇ r which is greater than 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)

Abstract

La présente invention concerne un appareil radiotéléphonique mobile comprenant un boîtier ainsi qu'un clavier situé dans la partie supérieure dudit boîtier, ce clavier s'étendant sensiblement dans la zone centrale de l'appareil. Pour réduire les rayonnements électromagnétiques nocifs, ce clavier comprend entre autres une armature support constituée d'un matériau électriquement conducteur et/ou à action magnétique et/ou diélectrique.
PCT/DE2002/003813 2001-10-10 2002-10-09 Appareil radiotelephonique mobile comprenant un element de correction reduisant la valeur de das (debit d'absorption specifique) WO2003034537A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02774449A EP1435124A1 (fr) 2001-10-10 2002-10-09 Appareil radiotelephonique mobile comprenant un element de correction reduisant la valeur de das (debit d'absorption specifique)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10149941.8 2001-10-10
DE10149941A DE10149941A1 (de) 2001-10-10 2001-10-10 Mobilfunkgerät mit einem den SAR-Wert reduzierenden Korrekturelement

Publications (1)

Publication Number Publication Date
WO2003034537A1 true WO2003034537A1 (fr) 2003-04-24

Family

ID=7702020

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2002/003813 WO2003034537A1 (fr) 2001-10-10 2002-10-09 Appareil radiotelephonique mobile comprenant un element de correction reduisant la valeur de das (debit d'absorption specifique)

Country Status (3)

Country Link
EP (1) EP1435124A1 (fr)
DE (1) DE10149941A1 (fr)
WO (1) WO2003034537A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102591463A (zh) * 2012-01-04 2012-07-18 安方高科电磁安全技术(北京)有限公司 一种低辐射键盘

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0603081A1 (fr) * 1992-12-17 1994-06-22 Alcatel N.V. Radio téléphone portable muni de moyens pour protéger l'utilisateur contre le rayonnement de cet émetteur
US5588041A (en) * 1995-01-05 1996-12-24 Motorola, Inc. Cellular speakerphone and method of operation thereof
WO1997036380A1 (fr) * 1996-03-26 1997-10-02 Euroconcept 2000 Limited Blindage pour un equipement radio
US6044152A (en) * 1998-01-15 2000-03-28 Ericsson Inc. Shielded keyboard for a portable communication device
WO2002071534A1 (fr) * 2001-03-07 2002-09-12 Siemens Aktiengesellschaft Appareil de radiocommunication pourvu d'un element de correction reduisant la valeur du sar

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4336529A (en) * 1980-02-19 1982-06-22 Pitney Bowes Inc. Postage meter having shielded keyboard to protect against electromagnetic radiation
EP0633585B1 (fr) * 1993-07-08 1997-11-05 Philips Patentverwaltung GmbH Boîtier pour appareils de télécommunication électrique
DE19600770C2 (de) * 1996-01-11 1997-11-13 Ibm Sicherheitsfolie mit EMV-Schutz

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0603081A1 (fr) * 1992-12-17 1994-06-22 Alcatel N.V. Radio téléphone portable muni de moyens pour protéger l'utilisateur contre le rayonnement de cet émetteur
US5588041A (en) * 1995-01-05 1996-12-24 Motorola, Inc. Cellular speakerphone and method of operation thereof
WO1997036380A1 (fr) * 1996-03-26 1997-10-02 Euroconcept 2000 Limited Blindage pour un equipement radio
US6044152A (en) * 1998-01-15 2000-03-28 Ericsson Inc. Shielded keyboard for a portable communication device
WO2002071534A1 (fr) * 2001-03-07 2002-09-12 Siemens Aktiengesellschaft Appareil de radiocommunication pourvu d'un element de correction reduisant la valeur du sar

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102591463A (zh) * 2012-01-04 2012-07-18 安方高科电磁安全技术(北京)有限公司 一种低辐射键盘

Also Published As

Publication number Publication date
EP1435124A1 (fr) 2004-07-07
DE10149941A1 (de) 2003-04-30

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