EP0652645A1 - Appareil radio portable muni de moyens pour protéger l'utilisateur contre le rayonnement - Google Patents

Appareil radio portable muni de moyens pour protéger l'utilisateur contre le rayonnement Download PDF

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Publication number
EP0652645A1
EP0652645A1 EP94202861A EP94202861A EP0652645A1 EP 0652645 A1 EP0652645 A1 EP 0652645A1 EP 94202861 A EP94202861 A EP 94202861A EP 94202861 A EP94202861 A EP 94202861A EP 0652645 A1 EP0652645 A1 EP 0652645A1
Authority
EP
European Patent Office
Prior art keywords
antenna
user
radio
radio device
antenna element
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Withdrawn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
EP94202861A
Other languages
German (de)
English (en)
Inventor
Peter C/O Philips Patentverwaltung Gmbh Fischer
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.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
Koninklijke Philips Electronics NV
Philips Electronics NV
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 Philips Patentverwaltung GmbH, Koninklijke Philips Electronics NV, Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Publication of EP0652645A1 publication Critical patent/EP0652645A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, 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

Definitions

  • the invention relates to a radio with an antenna.
  • Portable radio devices are meanwhile being realized in such a small design that both electroacoustic transducers such as microphone and earpiece, as well as high-frequency transmitter and antenna can be arranged in one and the same housing.
  • the antenna of the radio is located near the user's head when used as intended.
  • concerns have increased that the emission of electromagnetic fields in the immediate vicinity of the head of a user of such a portable radio device could lead to health problems.
  • the object of the invention is to provide a radio of the type mentioned, in which the risk of adverse health effects should be low.
  • At least one further antenna element is arranged essentially parallel to the antenna axis and which, during operation of the radio device, faces the head of a user of the radio device.
  • This additional antenna element can be designed, for example, as a passive reflector or, for example, as an element that is actively fed in the correct phase (for example, as in the antenna form known as HB9CV antenna).
  • HB9CV antenna the antenna form known as HB9CV antenna.
  • the antenna is mounted on the side of the housing facing away from the user. In this way, on the one hand, there is a greater distance between the antenna and the user's head.
  • a rod-shaped antenna element leads to a measurable reduction in the energy radiated in the direction of the user's head.
  • the mechanical strength of the antenna and antenna element can advantageously be increased by a common cover.
  • a further advantageous embodiment provides that the antenna is covered by a cover, the antenna element formed from conductive material being formed as part of this cover.
  • the antenna element can be made particularly inexpensive as part of the cover, for example as a metallization of the inner wall of the cover.
  • the position of use is determined by sound outlet openings 5 of a loudspeaker which are aligned with the user's ear and sound inlet openings 6 for a microphone which are aligned with the user's mouth.
  • Particularly small portable radio devices are designed so that the radio device is held in the position of use in such a way that the sound outlet openings lie against the user's ear. Deviating from this representation, somewhat larger portable radio devices are designed so that they are held in front of the user's head.
  • the radio is cantilevered in front of the head of the user or, as in Figure 1, on the side of the user's head, that is, on the user's ear, there is always a housing side or an uppermost edge of the housing surface, which in the position of use The user's head is closest.
  • This housing surface or housing edge is referred to below as the housing side 4 facing the head 7 of the user during operation of the radio device 1.
  • the housing side opposite this housing surface or housing edge has the greatest distance from the user's head and is therefore referred to below as the housing side 8 facing away from the user's head 7.
  • the antenna 2 is mounted on the housing surface pointing upwards in the position of use on the housing side 8 facing away from the user 7.
  • an electrically conductive rod is parallel to the antenna 2, i.e. a further antenna element 3 is arranged as a reflector, which can be made smaller or the same length as the antenna 2 itself.
  • the radiation characteristic of the antenna 2 is bent by the reflector 3 in such a way that the head region of the user 7 is kept largely free of electromagnetic radiation (cf. FIG. 3).
  • electromagnetic radiation in the direction of the head 7 of the user of the radio device 1 can be avoided or at least significantly reduced.
  • antenna 2 and reflector 3 are encased by a common cover 9, which is made of plastic, for example.
  • cover 9 which is made of plastic, for example.
  • Reflector 3 itself is not subject to high mechanical demands, it can therefore also be formed, for example, from a metal braid which is cast into cover 9.
  • FIG. 2 shows the top of the hand-held radio device 1 shown in FIG. 1, the reference numbers already given in connection with FIG. 1 being used.
  • FIG. 3 shows a basic illustration of an antenna radiation diagram for a radio device shown in FIGS. 1 and 2 with an antenna 2 and an antenna element 3.
  • the distance d between the antenna 2 and the antenna element 3 is designated by d.
  • the distance d between the antenna 2 and the reflector 3 is preferably of the order of a quarter wavelength ( ⁇ / 4) of the transmission frequency.
  • a distance d of the order of one twentieth to one tenth of the wavelength of the transmission frequency can be achieved under certain circumstances. But even at these distances, due to the achievable forward gain of the antenna of 2dB - 3dB, the transmission power can be reduced accordingly, so that the electromagnetic energy radiated in the direction of the head 7 of the user is correspondingly lower than that of an omnidirectionally radiating antenna.
  • the arrangement of the further antenna element 3 at a distance d from the antenna 2 creates an antenna radiation diagram 11 with a heart-shaped directivity (cardiode).
  • an antenna radiation diagram 12 is compared to an omnidirectionally radiating antenna.
  • FIG. 4 shows a further embodiment of a handheld radio in side view and FIG. 5 shows the top of the handheld radio shown in FIG. 4.
  • antenna 2 and reflector are encased by a common cover 9, which consists, for example, of plastic.
  • the reflector is formed, for example, from a metal braid 10 which is cast into the cover 9.
  • the cover 9 can, for example, also be coated with an electrically conductive surface by vapor deposition of a metal layer 10 as a reflector. As shown in FIGS. 4 and 5, such a coating 10 is applied to the inside of the hollow cover 9, since the coating is thus better protected against abrasion.
  • a cover 9 Another advantage of such a cover 9 is that it can be made detachable. In this way, the radio device 1 can be easily equipped with a reflector 10 simply by placing the cover 9 on the antenna 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)
  • Transceivers (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Aerials With Secondary Devices (AREA)
EP94202861A 1993-10-09 1994-10-04 Appareil radio portable muni de moyens pour protéger l'utilisateur contre le rayonnement Withdrawn EP0652645A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4334439A DE4334439A1 (de) 1993-10-09 1993-10-09 Funkgerät mit einer Antenne
DE4334439 1993-10-09

Publications (1)

Publication Number Publication Date
EP0652645A1 true EP0652645A1 (fr) 1995-05-10

Family

ID=6499767

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94202861A Withdrawn EP0652645A1 (fr) 1993-10-09 1994-10-04 Appareil radio portable muni de moyens pour protéger l'utilisateur contre le rayonnement

Country Status (4)

Country Link
EP (1) EP0652645A1 (fr)
JP (1) JPH07177053A (fr)
KR (1) KR950012799A (fr)
DE (1) DE4334439A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996021254A1 (fr) * 1995-01-05 1996-07-11 Paul Francis Bickert Antenne perfectionnee pour dispositif de communication radio portable
WO1997044911A1 (fr) * 1996-05-17 1997-11-27 Ryhaenen Heikki Procede et dispositif visant a eliminer ou a restreindre localement un champ de rayonnement a frequence radioelectrique
DE19701839A1 (de) * 1997-01-21 1998-07-23 Christoph Sonntag Vorrichtung und ein Verfahren zur Reduktion von Strahlenbelastung des Gehirns beim Telefonieren mit mobilen Sendeeinheiten
US5907307A (en) * 1995-01-05 1999-05-25 Bickert; Paul F. Antenna for a portable radio communication device
US6181297B1 (en) 1994-08-25 2001-01-30 Symmetricom, Inc. Antenna
WO2001056110A1 (fr) * 2000-01-24 2001-08-02 Siemens Aktiengesellschaft Antenne tige pour un appareil radiomobile
EP1137101A2 (fr) * 2000-03-21 2001-09-26 Sony Corporation Dispositif d'antenne et appareil de communication sans fil
US6300917B1 (en) 1999-05-27 2001-10-09 Sarantel Limited Antenna
US6369776B1 (en) 1999-02-08 2002-04-09 Sarantel Limited Antenna
EP1206001A1 (fr) * 2000-11-14 2002-05-15 Northrop Grumman Corporation Antenne réseau pour un téléphone cellulaire
US6552693B1 (en) 1998-12-29 2003-04-22 Sarantel Limited Antenna
US6690336B1 (en) 1998-06-16 2004-02-10 Symmetricom, Inc. Antenna
DE19823126B4 (de) * 1998-05-23 2012-08-23 Ipcom Gmbh & Co. Kg Funkgerät

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100372888B1 (ko) * 2000-12-27 2003-02-19 한국전자통신연구원 반노출 고정형 광대역 모노폴 안테나를 구비한 폴더형 휴대폰
JP2003069327A (ja) 2001-08-28 2003-03-07 Nec Saitama Ltd 携帯型無線通信装置のアンテナ構造及びこのアンテナ構造を備えた携帯型無線通信装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4138681A (en) * 1977-08-29 1979-02-06 Motorola, Inc. Portable radio antenna
EP0214806A2 (fr) * 1985-08-29 1987-03-18 Nec Corporation Radio portable
CA2022958A1 (fr) * 1990-08-09 1992-02-10 Martin Greenwood Combines portatifs
JPH04220851A (ja) * 1990-12-21 1992-08-11 Mitsubishi Electric Corp コードレス電話装置
EP0548663A1 (fr) * 1991-12-19 1993-06-30 Siemens Aktiengesellschaft Radio émetteur-récepteur compact, particulièrement portable avec un antenne rétractable ou pliable
DE9311242U1 (de) * 1993-07-28 1993-09-16 Votronic Entwicklungs- und Produktionsgesellschaft für elektronische Geräte mbH, 66386 St Ingbert Mobiles Telefon für Kraftfahrzeuge
DE4221121C1 (de) * 1992-06-26 1993-10-21 Siemens Ag Handfunkgerät
WO1994014208A1 (fr) * 1992-12-16 1994-06-23 University Of Bradford Ameliorations concernant les telephones portatifs

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4138681A (en) * 1977-08-29 1979-02-06 Motorola, Inc. Portable radio antenna
EP0214806A2 (fr) * 1985-08-29 1987-03-18 Nec Corporation Radio portable
CA2022958A1 (fr) * 1990-08-09 1992-02-10 Martin Greenwood Combines portatifs
JPH04220851A (ja) * 1990-12-21 1992-08-11 Mitsubishi Electric Corp コードレス電話装置
EP0548663A1 (fr) * 1991-12-19 1993-06-30 Siemens Aktiengesellschaft Radio émetteur-récepteur compact, particulièrement portable avec un antenne rétractable ou pliable
DE4221121C1 (de) * 1992-06-26 1993-10-21 Siemens Ag Handfunkgerät
WO1994014208A1 (fr) * 1992-12-16 1994-06-23 University Of Bradford Ameliorations concernant les telephones portatifs
DE9311242U1 (de) * 1993-07-28 1993-09-16 Votronic Entwicklungs- und Produktionsgesellschaft für elektronische Geräte mbH, 66386 St Ingbert Mobiles Telefon für Kraftfahrzeuge

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
KOMMRUSCH: "High speed antenna", MOTOROLA TECHNICAL DEVELOPMENTS, vol. 18, March 1993 (1993-03-01), SCHAUMBURG, ILLINOIS US, pages 84 *
PATENT ABSTRACTS OF JAPAN vol. 16, no. 570 (E - 1297) *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6181297B1 (en) 1994-08-25 2001-01-30 Symmetricom, Inc. Antenna
US5907307A (en) * 1995-01-05 1999-05-25 Bickert; Paul F. Antenna for a portable radio communication device
WO1996021254A1 (fr) * 1995-01-05 1996-07-11 Paul Francis Bickert Antenne perfectionnee pour dispositif de communication radio portable
WO1997044911A1 (fr) * 1996-05-17 1997-11-27 Ryhaenen Heikki Procede et dispositif visant a eliminer ou a restreindre localement un champ de rayonnement a frequence radioelectrique
DE19701839A1 (de) * 1997-01-21 1998-07-23 Christoph Sonntag Vorrichtung und ein Verfahren zur Reduktion von Strahlenbelastung des Gehirns beim Telefonieren mit mobilen Sendeeinheiten
DE19823126B4 (de) * 1998-05-23 2012-08-23 Ipcom Gmbh & Co. Kg Funkgerät
US6690336B1 (en) 1998-06-16 2004-02-10 Symmetricom, Inc. Antenna
US6552693B1 (en) 1998-12-29 2003-04-22 Sarantel Limited Antenna
US6369776B1 (en) 1999-02-08 2002-04-09 Sarantel Limited Antenna
US6300917B1 (en) 1999-05-27 2001-10-09 Sarantel Limited Antenna
WO2001056110A1 (fr) * 2000-01-24 2001-08-02 Siemens Aktiengesellschaft Antenne tige pour un appareil radiomobile
EP1137101A2 (fr) * 2000-03-21 2001-09-26 Sony Corporation Dispositif d'antenne et appareil de communication sans fil
EP1137101A3 (fr) * 2000-03-21 2003-12-17 Sony Corporation Dispositif d'antenne et appareil de communication sans fil
US6437746B1 (en) 2000-11-14 2002-08-20 Northrop Grumman Corp Cellular telephone antenna array
EP1206001A1 (fr) * 2000-11-14 2002-05-15 Northrop Grumman Corporation Antenne réseau pour un téléphone cellulaire

Also Published As

Publication number Publication date
DE4334439A1 (de) 1995-04-13
KR950012799A (ko) 1995-05-17
JPH07177053A (ja) 1995-07-14

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