EP0588271B1 - Portable transceiver apparatus with low irradiation of the user, employing an antenna having an asymmetric radiation pattern - Google Patents

Portable transceiver apparatus with low irradiation of the user, employing an antenna having an asymmetric radiation pattern Download PDF

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Publication number
EP0588271B1
EP0588271B1 EP93114643A EP93114643A EP0588271B1 EP 0588271 B1 EP0588271 B1 EP 0588271B1 EP 93114643 A EP93114643 A EP 93114643A EP 93114643 A EP93114643 A EP 93114643A EP 0588271 B1 EP0588271 B1 EP 0588271B1
Authority
EP
European Patent Office
Prior art keywords
antenna
user
handset
irradiation
portable transceiver
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.)
Expired - Lifetime
Application number
EP93114643A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0588271A1 (en
Inventor
Claudio Maggio
Luigi Panico
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.)
Alcatel Lucent SAS
Original Assignee
Alcatel SA
Alcatel Alsthom Compagnie Generale dElectricite
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 Alcatel SA, Alcatel Alsthom Compagnie Generale dElectricite filed Critical Alcatel SA
Publication of EP0588271A1 publication Critical patent/EP0588271A1/en
Application granted granted Critical
Publication of EP0588271B1 publication Critical patent/EP0588271B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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 present invention relates to a portable transceiver apparatus, in particular a radiomobile telephone set, with low irradiation of the user, including a handset and an antenna applied to said handset.
  • FIGs. 1 and 2 there are illustrated schematically in a side view two of such sets nowadays extensively used on the market, in particular in Fig. 1 the Motorola 8800X model and in Fig. 2 the 9800X one; however the schematic side view of Fig. 1 is the view of all the portable transceiver apparatuses.
  • Such apparatuses basically comprise a handset AC and an antenna AA applied to the handset.
  • Located inside said handset generally are a loudspeaker AL, a microphone AM, a control panel AK and the circuitry for operating the apparatus.
  • the antenna AA of a radiomobile telephone set and, more in general, of a portable transceiver apparatus is placed in the upper portion of the handset AC; several models, all of the retractile and fixed whip type are available.
  • FIGs. 1 and 2 two schematic side views of two prior art portable transceiver apparatuses can be seen; for the purpose of describing the present invention it will suffice to say that such apparatuses comprise a handset AC and an antenna AA applied to the handset AC.
  • the solution, in accordance with the present invention, for limiting the irradiation of the user's head caused by a portable transceiver apparatus consists in using an antenna AA having a suitable asymmetric radiation pattern, such as to be extremely limited in the direction of the user's head.
  • Fig. 3 e.g., there is shown one of many possible radiation patterns RD of the assembly formed by handset AC and antenna AA in accordance with the present invention, represented in overlap to an apparatus and to the head U of its user.
  • Such radiation patterns having special shape can be obtained through suitable choice of the type and shape of antenna AA.
  • a first possibility consists in using a screened whip antenna. Another possibility is to use high frequency antenna arrays.
  • Such arrays basically comprise at least one horizontal-dipole radiator located at a suitable distance from a horizontal conducting plane.
  • Several dipoles may be placed in parallel to form bays and several bays can be associated to form curtains.
  • the radiation pattern assumes special shapes respectively increasing the vertical and horizontal directivity.
  • At least one reflector can be placed in the back zone to limit the radiation pattern in suitable directions; such reflectors can be constituted by tuned dipoles operating in a passive manner, or by a vertical reflecting screen, composed of densely-spaced horizontal turns.
  • antennas usable individually or in array fashion are, e.g., horizontal rhombic antennas, long singlewire antennas, horizontal V antennas both resonant and terminated.
  • the antenna when the apparatus is not in use, the antenna can be located inside it and, when the apparatus is to be used, it can be drawn out by sliding or by turning over; this in order to reduce the overall dimensions and the handiness of the apparatus when not in use, of course.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)
  • Transceivers (AREA)
  • Transmitters (AREA)
  • Telephone Set Structure (AREA)
  • Medicinal Preparation (AREA)
  • Adornments (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Details Of Aerials (AREA)
  • Lock And Its Accessories (AREA)
EP93114643A 1992-09-18 1993-09-11 Portable transceiver apparatus with low irradiation of the user, employing an antenna having an asymmetric radiation pattern Expired - Lifetime EP0588271B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI922146 1992-09-18
ITMI922146A IT1255602B (it) 1992-09-18 1992-09-18 Apparecchio ricetrasmettitore portatile a bassa irradiazione dell'utente, utilizzante una antenna avente diagramma di irradiazione asimmetrico.

Publications (2)

Publication Number Publication Date
EP0588271A1 EP0588271A1 (en) 1994-03-23
EP0588271B1 true EP0588271B1 (en) 1998-05-06

Family

ID=11363964

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93114643A Expired - Lifetime EP0588271B1 (en) 1992-09-18 1993-09-11 Portable transceiver apparatus with low irradiation of the user, employing an antenna having an asymmetric radiation pattern

Country Status (8)

Country Link
EP (1) EP0588271B1 (it)
AT (1) ATE165942T1 (it)
AU (1) AU668748B2 (it)
DE (1) DE69318361T2 (it)
DK (1) DK0588271T3 (it)
ES (1) ES2116378T3 (it)
IT (1) IT1255602B (it)
NZ (1) NZ248624A (it)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0954050A1 (en) * 1993-05-27 1999-11-03 Griffith University Antennas for use in portable communications devices
NL9302192A (nl) * 1993-07-09 1995-02-01 Ericsson Business Mobile Netwo Draadloze telefoon.
DE4326117A1 (de) * 1993-08-04 1995-02-09 Philips Patentverwaltung Funkgerät mit einer Antenne
US5528254A (en) * 1994-05-31 1996-06-18 Motorola, Inc. Antenna and method for forming same
GB9417450D0 (en) 1994-08-25 1994-10-19 Symmetricom Inc An antenna
US6288682B1 (en) 1996-03-14 2001-09-11 Griffith University Directional antenna assembly
FI962091A0 (fi) * 1996-05-17 1996-05-17 Heikki Ryhaenen Foerfarande och anordning foer lokal avlaegsning och begraensning av ett radiofrekvent straolningsfelt
FI104662B (fi) * 1997-04-11 2000-04-14 Nokia Mobile Phones Ltd Antennijärjestely pienikokoisiin radioviestintä-laitteisiin
SE509232C2 (sv) * 1997-07-09 1998-12-21 Allgon Ab Handportabel telefon med strålningsabsorberande anordning
GB2327572B (en) * 1997-07-22 1999-06-02 Matsushita Communication Ind Telephone with multiple antenna configuration
GB9813002D0 (en) 1998-06-16 1998-08-12 Symmetricom Inc An antenna
GB9828768D0 (en) 1998-12-29 1999-02-17 Symmetricom Inc An antenna
GB9902765D0 (en) 1999-02-08 1999-03-31 Symmetricom Inc An antenna
GB9912441D0 (en) 1999-05-27 1999-07-28 Symmetricon Inc An antenna
CN110501614A (zh) * 2019-08-31 2019-11-26 广东电网有限责任公司 适用于电磁暂态仿真的电动机负荷暂态过程计算方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2702109B2 (ja) * 1985-08-29 1998-01-21 日本電気株式会社 携帯無線機
US4876552A (en) * 1988-04-27 1989-10-24 Motorola, Inc. Internally mounted broadband antenna
US4876709A (en) * 1988-09-08 1989-10-24 Dynascan Corporation Antenna for cordless telephone system
FR2701613B1 (fr) * 1993-02-11 1995-03-31 Alcatel Radiotelephone Appareil émetteur-récepteur radiotéléphonique portatif.

Also Published As

Publication number Publication date
AU4607593A (en) 1994-03-24
IT1255602B (it) 1995-11-09
ITMI922146A1 (it) 1994-03-18
EP0588271A1 (en) 1994-03-23
ITMI922146A0 (it) 1992-09-18
NZ248624A (en) 1996-01-26
ATE165942T1 (de) 1998-05-15
AU668748B2 (en) 1996-05-16
DK0588271T3 (da) 1998-10-07
ES2116378T3 (es) 1998-07-16
DE69318361D1 (de) 1998-06-10
DE69318361T2 (de) 1999-04-01

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