EP0833402B1 - Radio transmission apparatus with a retractable antenna and an antenna for such apparatus - Google Patents

Radio transmission apparatus with a retractable antenna and an antenna for such apparatus Download PDF

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Publication number
EP0833402B1
EP0833402B1 EP97202822A EP97202822A EP0833402B1 EP 0833402 B1 EP0833402 B1 EP 0833402B1 EP 97202822 A EP97202822 A EP 97202822A EP 97202822 A EP97202822 A EP 97202822A EP 0833402 B1 EP0833402 B1 EP 0833402B1
Authority
EP
European Patent Office
Prior art keywords
antenna
spiral
wire
retracted position
excitation
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
EP97202822A
Other languages
German (de)
French (fr)
Other versions
EP0833402A1 (en
Inventor
David c/o Société Civile S.P.I.D. Duperray
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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Publication of EP0833402A1 publication Critical patent/EP0833402A1/en
Application granted granted Critical
Publication of EP0833402B1 publication Critical patent/EP0833402B1/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
    • H01Q1/243—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
    • H01Q1/244—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 extendable from a housing along a given path
    • 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

Definitions

  • the invention also relates to an antenna device for such an apparatus.
  • the invention provides an apparatus of the kind mentioned in the preamble which largely mitigates the aforementioned drawbacks.
  • a device 1 in Figure 1, there is shown a device 1 according to the invention.
  • This device can be a GSM terminal and must therefore have small dimensions. It includes, as in usual, a keyboard 2, a screen 3, a microphone 4 and a earpiece 5. It is also provided with an antenna device 10 with a folded position, which is shown in A at the Figure 1, and an unfolded position, which is shown in B on this same figure. The stowed position is used when the device is waiting for a call. This implies that only the receiving part of the device is in operation. In the unfolded position the device is transmitting and, in this case, the antenna adaptation performance must be better.
  • FIG. 2 shows in more detail the device antenna 10.
  • this antenna is shown in position folded and at B in the unfolded position.
  • the reference 20 indicates the antenna excitation point. This point is in contact with a conductive ring 21 which is in contact with a first end of a first propeller 25. The other end of this propeller is in contact with a conductive ring 28.
  • These two rings 21 and 28 allow the passage of a strand of radiation 30. This strand of radiation enters a cavity 32 formed in the device 1 when the antenna is in the folded position and emerges outside when the antenna is in the unfolded position.
  • a second propeller 35 is placed above this radiating strand 30.
  • an insulating element 50 allows a mechanical connection of this propeller 35 with the upper end of said strand 30. This element is rendered visible at A by a notch made in the drawing.
  • the lower end of the strand 30 is connected mechanically and electrically to a conductive part circular 55.
  • the strand 30 and the propeller 25 participate in the radiation.
  • the antenna has an extended bandwidth due to these two coupled resonant systems.
  • the two propellers When the antenna is in the folded position, the two propellers are placed in series or in cascade which increases their mechanical height and, therefore, radio efficiency which is related to this height.
  • FIG 3 shows the performance, in wave rate stationary (VSWR), obtained by these antennas.

Description

L'invention concerne un appareil de radiotransmission comportant un dispositif d'antenne dépliable depuis une position repliée vers une position dépliée, dispositif formé par :

  • une liaison d'excitation (20) pour être raccordé à des circuits d'émission et/ou de réception,
  • une première hélice de rayonnement (25) dont une première extrémité est reliée à ladite liaison d'excitation,
  • un brin de rayonnement (30) pour rayonner et/ou capter de l'énergie issue ou en direction de ladite liaison d'excitation, notamment en position dépliée, comportant à une de ses extrémités une partie de contact en forme d'anneau (21) pour être reliée à ladite liaison d'excitation en position dépliée.
  • une deuxième hélice (35) située au voisinage d'une extrémité dudit brin,
  • un élément isolant (50) pour isoler l'autre extrémité dudit brin de ladite deuxième hélice.
The invention relates to a radio transmission device comprising an antenna device which can be extended from a folded position to an extended position, a device formed by:
  • an excitation link (20) to be connected to transmission and / or reception circuits,
  • a first radiation helix (25) of which a first end is connected to said excitation link,
  • a radiation strand (30) for radiating and / or capturing energy from or towards said excitation link, in particular in the unfolded position, comprising at one of its ends a ring-shaped contact part (21 ) to be connected to said excitation link in the unfolded position.
  • a second propeller (35) located in the vicinity of one end of said strand,
  • an insulating element (50) for isolating the other end of said strand from said second helix.

L'invention concerne aussi un dispositif d'antenne pour un tel appareil.The invention also relates to an antenna device for such an apparatus.

L'invention trouve d'importantes applications dans le domaine des radiomobiles utilisées dans les réseaux cellulaires genre GSM, AMPS, ETACS, etc.. Dans les réseaux modernes la bande passante utilisée est relativement importante. Comme les appareils utilisés sont portables, on souhaite que leurs dimensions soient faibles, ce qui impose que les antennes soient aussi peu encombrantes que possible surtout lorsque les appareils sont en phase d'attente d'une communication. Les antennes sont, alors, mises dans leur position repliée. On est donc confronté au problème de concilier un fonctionnement à large bande avec un encombrement réduit des antennes. Il faut rappeler qu'il y a des difficultés à faire fonctionner sur une large bande les antennes de faible encombrement.The invention finds important applications in the field of mobile phones used in cellular networks like GSM, AMPS, ETACS, etc. In modern networks the bandwidth used is relatively large. As the devices used are portable, we want their dimensions to be low, which means that the antennas must be as compact as possible especially when the devices are waiting for a call. The antennas are then placed in their folded position. So we are faced with problem of reconciling broadband operation with congestion reduces antennas. It must be remembered that there are difficulties in operating on a wide band antennas of small size.

Un appareil formé d'un tel dispositif d'antenne est connu du document de brevet WO 9512224AAn apparatus formed by such an antenna device is known from the document de WO 9512224A

En position dépliée, cette antenne met en série les deux hélices au moyen d'un brin rayonnant, l'hélice, dite inférieure, située près du pont d'alimentation va apporter une grave désadaptation à l'antenne. En effet les antennes se rapprochant du quart de la longueur d'onde ont une impédance facile à adapter et tout autre élément rajouté va apporte un effet perturbateur Ceci peut être considéré comme un inconvénient. Un autre inconvénientréside dans le fait que la hauteur de l'antenne, en position dépliée est limitée à la hauteur de l'hélice inférieureIn the unfolded position, this antenna puts the two propellers in series using with a radiating strand, the so-called lower propeller, located near the supply bridge goes bring a serious mismatch to the antenna. Indeed the antennas approaching the quarter of the wavelength have an easily adjustable impedance and any other element added will bring a disruptive effect This can be considered a disadvantage. Another disadvantage is that the height of the antenna, in the unfolded position is limited to the height of the lower propeller

L'invention propose un appareil du genre mentionné dans le préambule qui atténue dans une large mesure les inconvénients précités.The invention provides an apparatus of the kind mentioned in the preamble which largely mitigates the aforementioned drawbacks.

Pour cela un tel appareil est remarquable en ce qu'il est prévu une deuxième partie de contact en forme d'anneau (28) reliée à la deuxième extrémité de la première hélice (25) pour connecter en cascade les deux hélices en position repliée et en ce qu'il est prévu une cavité (32) pour contenir'en position repliée au moins une partie dudit brin. For this, such a device is remarkable in that it is provided a second ring-shaped contact part (28) connected to the second end of the first propeller (25) for cascading the two propellers in the folded position and in that a cavity (32) is provided for containing in the folded position at least one part of said strand.

La description suivante, faite en regard des dessins ci-annexés, le tout donné à titre d'exemple non limitatif fera bien comprendre comment l'invention peut être réalisée.

  • La figure 1 montre un appareil conforme à l'invention.
  • La figure 2 montre l'antenne faisant partie de l'appareil dans une première position.
  • La figure 3 montre l'antenne faisant partie de l'appareil dans une deuxième position.
    • The following description, given with reference to the appended drawings, all given by way of nonlimiting example will make it clear how the invention can be implemented.
  • Figure 1 shows an apparatus according to the invention.
  • Figure 2 shows the antenna forming part of the device in a first position.
  • Figure 3 shows the antenna forming part of the device in a second position.

    • A la figure 1, on a représenté un appareil 1 conforme à l'invention. Cet appareil peut être un terminal GSM et doit donc présenter de faibles dimensions. Il comporte, comme à l'accoutumée, un clavier 2, un écran 3, un microphone 4 et un écouteur 5. Il est également muni d'un dispositif d'antenne 10 présentant une position repliée, ce qui est montré en A à la figure 1, et une position dépliée, ce qui est représenté en B sur cette même figure. La position repliée est utilisée lorsque l'appareil est en attente d'une communication. Ceci implique que seule la partie réception de l'appareil est en fonctionnement. En position dépliée l'appareil est en émission et, dans ce cas, les performances en adaptation de l'antenne doivent être meilleures.In Figure 1, there is shown a device 1 according to the invention. This device can be a GSM terminal and must therefore have small dimensions. It includes, as in usual, a keyboard 2, a screen 3, a microphone 4 and a earpiece 5. It is also provided with an antenna device 10 with a folded position, which is shown in A at the Figure 1, and an unfolded position, which is shown in B on this same figure. The stowed position is used when the device is waiting for a call. This implies that only the receiving part of the device is in operation. In the unfolded position the device is transmitting and, in this case, the antenna adaptation performance must be better.

    La figure 2 montre plus en détail le dispositif d'antenne 10. En A, cette antenne est montrée en position repliée et en B en position dépliée. Sur cette figure, la référence 20 indique le point d'excitation de l'antenne. Ce point est en contact avec un anneau conducteur 21 qui est en contact avec une première extrémité d'une première hélice 25. L'autre extrémité de cette hélice est en contact avec un anneau conducteur 28. Ces deux anneaux 21 et 28 permettent le passage d'un brin de rayonnement 30. Ce brin de rayonnement pénètre dans une cavité 32 ménagée dans l'appareil 1 lorsque l'antenne est en position repliée et émerge à l'extérieur lorsque l'antenne est en position dépliée. Une deuxième hélice 35 est placée au-dessus de ce brin rayonnant 30.Figure 2 shows in more detail the device antenna 10. At A, this antenna is shown in position folded and at B in the unfolded position. In this figure, the reference 20 indicates the antenna excitation point. This point is in contact with a conductive ring 21 which is in contact with a first end of a first propeller 25. The other end of this propeller is in contact with a conductive ring 28. These two rings 21 and 28 allow the passage of a strand of radiation 30. This strand of radiation enters a cavity 32 formed in the device 1 when the antenna is in the folded position and emerges outside when the antenna is in the unfolded position. A second propeller 35 is placed above this radiating strand 30.

    Conformément à l'invention, un élément isolant 50 permet une liaison mécanique de cette hélice 35 avec l'extrémité supérieure dudit brin 30. Cet élément est rendu visible en A par une échancrure ménagée sur le dessin.According to the invention, an insulating element 50 allows a mechanical connection of this propeller 35 with the upper end of said strand 30. This element is rendered visible at A by a notch made in the drawing.

    L'extrémité inférieure du brin 30 est reliée mécaniquement et électriquement à une partie conductrice circulaire 55.The lower end of the strand 30 is connected mechanically and electrically to a conductive part circular 55.

    Ainsi lorsque l'antenne est en position dépliée, le brin 30 et l'hélice 25 participent au rayonnement. Comme les longueurs électriques de ce brin et de cette hélice avoisinent λ/4 (où λ est une longueur d'onde moyenne à laquelle l'antenne rayonne), l'antenne possède une largeur de bande étendue due à ces deux systèmes résonnants couplés.So when the antenna is in the unfolded position, the strand 30 and the propeller 25 participate in the radiation. Like the electrical lengths of this strand and this propeller are close to λ / 4 (where λ is an average wavelength at which the antenna ), the antenna has an extended bandwidth due to these two coupled resonant systems.

    Lorsque l'antenne est en position repliée, les deux hélices sont mises en série ou en cascade ce qui augmente leur hauteur mécanique et, de ce fait, le rendement radioélectrique qui est lié à cette hauteur.When the antenna is in the folded position, the two propellers are placed in series or in cascade which increases their mechanical height and, therefore, radio efficiency which is related to this height.

    La figure 3 montre les performances, en taux d'ondes stationnaires (VSWR), obtenues par ces antennes. Figure 3 shows the performance, in wave rate stationary (VSWR), obtained by these antennas.

    En A, les performances de l'antenne, montrées en trait plein, sont comparées avec celles d'un brin λ/4 montrées en tirets.In A, the performance of the antenna, shown in solid line, are compared with those of a strand λ / 4 shown in dashes.

    En B, les performances de l'antenne, montrées en trait plein, sont comparées avec celles, représentées en tirets d'une hélice seule.In B, the performance of the antenna, shown in solid line, are compared with those, represented in dashes of a single propeller.

    Claims (4)

    1. A radio transmission apparatus comprising an antenna that can be extended from a retracted position to an extended position, which antenna is formed by:
      an excitation link (20) to be connected to transceiver circuits,
      a first radiation spiral (25) of which one end is connected to said excitation link,
      a radiation wire (30) for radiating and/or capturing energy from or in the direction of said excitation link, notably in extended position, comprising at one of its ends an annular contact part (21) to be connected to said excitation link in extended position,
      a second spiral (35) positioned in the neighborhood of an end of said wire,
      an insulation element (50) for insulating the other end of the wire of said second spiral, characterized in that a second annular contact part (28) is provided, connected to the second end of the first spiral (25), to connect the two spirals in cascade in retracted position and in that a cavity (32) is provided for containing at least part of said wire in retracted position.
    2. A radio transmission apparatus as claimed in claim 1, characterized in that said insulating element is located inside said first spiral when the antenna is in retracted position.
    3. An extendable antenna formed by:
      an excitation link (20) to be connected to transceiver circuits,
      a first radiation spiral (25) of which one end is connected to said excitation link,
      a radiation wire (30) for radiating and/or capturing energy from or in the direction of said excitation link, notably in extended position, comprising at one of its ends an annular contact part (21) to be connected to said excitation link in extended position,
      a second spiral (35) positioned in the neighborhood of an end of said wire,
      an insulation element (50) for insulating the other end of the wire of said second spiral. characterized in that a second annular contact part (28) is provided, connected to the second end of the first spiral (25), to connect the two spirals in cascade in retracted position and in that a cavity (32) is provided for containing at least part of said wire in retracted position.
    4. An extendable antenna as claimed in claim 3, characterized in that said insulating element is placed inside said first spiral when the antenna is in retracted position.
    EP97202822A 1996-09-25 1997-09-15 Radio transmission apparatus with a retractable antenna and an antenna for such apparatus Expired - Lifetime EP0833402B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9611667 1996-09-25
    FR9611667 1996-09-25

    Publications (2)

    Publication Number Publication Date
    EP0833402A1 EP0833402A1 (en) 1998-04-01
    EP0833402B1 true EP0833402B1 (en) 2004-12-08

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    Application Number Title Priority Date Filing Date
    EP97202822A Expired - Lifetime EP0833402B1 (en) 1996-09-25 1997-09-15 Radio transmission apparatus with a retractable antenna and an antenna for such apparatus

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    US (1) US5900839A (en)
    EP (1) EP0833402B1 (en)
    JP (1) JP3919895B2 (en)
    DE (1) DE69731861T2 (en)

    Families Citing this family (11)

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    Publication number Priority date Publication date Assignee Title
    FI102434B1 (en) * 1996-08-22 1998-11-30 Lk Products Oy Dual frequency antenna
    BR9917171A (en) * 1998-02-27 2001-12-04 Motorola Inc Antenna adapted to operate in various frequency bands
    US6047166A (en) * 1998-03-23 2000-04-04 Lan; Chih Hung Gain structure of antennae of mobile phones
    JP2000091827A (en) * 1998-09-07 2000-03-31 Ace Technol Co Ltd Helical antenna for portable communication terminal equipment using ceramic dielectric and manufacture of the same
    WO2000054879A1 (en) 1999-03-18 2000-09-21 Matsushita Electric Works, Ltd. Catalyst for water gas shift reaction, method for removing carbon monoxide in hydrogen gas and electric power-generating system of fuel cell
    US7226591B2 (en) * 2000-05-22 2007-06-05 Genentech, Inc. Interleukin-22 polypeptides, nucleic acids encoding the same and methods for the treatment of pancreatic disorders
    US6204818B1 (en) * 2000-02-01 2001-03-20 Auden Technology Mfg. Co., Ltd. Stretchable antenna for mobile phones
    US6417808B1 (en) 2000-03-07 2002-07-09 Nec Corporation Transceiver including antenna apparatus which is compactly accommodated in body of transceiver
    US6359592B1 (en) 2000-11-10 2002-03-19 Motorola, Inc. Minimum frequency shift telescoping antenna
    JP3515559B2 (en) * 2002-01-09 2004-04-05 日本アンテナ株式会社 Multi-frequency antenna
    CN110416730B (en) * 2018-04-27 2021-08-31 Oppo广东移动通信有限公司 Electronic device and control method of electronic device

    Family Cites Families (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    JP2974895B2 (en) * 1993-09-16 1999-11-10 富士通株式会社 Portable wireless devices
    SE514027C2 (en) * 1993-10-29 2000-12-11 Allgon Ab Broadband antenna device
    US5650789A (en) * 1995-10-10 1997-07-22 Galtronics Ltd. Retractable antenna system
    US5764191A (en) * 1996-10-07 1998-06-09 Sony Corporation Retractable antenna assembly for a portable radio device

    Also Published As

    Publication number Publication date
    DE69731861T2 (en) 2006-03-02
    DE69731861D1 (en) 2005-01-13
    EP0833402A1 (en) 1998-04-01
    US5900839A (en) 1999-05-04
    JPH10112606A (en) 1998-04-28
    JP3919895B2 (en) 2007-05-30

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