EP1305845B9 - Planare antenne für mobilfunkgeräte - Google Patents

Planare antenne für mobilfunkgeräte Download PDF

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Publication number
EP1305845B9
EP1305845B9 EP01958206A EP01958206A EP1305845B9 EP 1305845 B9 EP1305845 B9 EP 1305845B9 EP 01958206 A EP01958206 A EP 01958206A EP 01958206 A EP01958206 A EP 01958206A EP 1305845 B9 EP1305845 B9 EP 1305845B9
Authority
EP
European Patent Office
Prior art keywords
antenna
antenna according
ground plane
radiation
reception
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
EP01958206A
Other languages
English (en)
French (fr)
Other versions
EP1305845A1 (de
EP1305845B1 (de
Inventor
François BLANCHO
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.)
Vallaroche SAS
Original Assignee
Sagem Mobiles SA
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 Sagem Mobiles SA filed Critical Sagem Mobiles SA
Publication of EP1305845A1 publication Critical patent/EP1305845A1/de
Application granted granted Critical
Publication of EP1305845B1 publication Critical patent/EP1305845B1/de
Publication of EP1305845B9 publication Critical patent/EP1305845B9/de
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
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/06—Details
    • H01Q9/14—Length of element or elements adjustable
    • 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
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/321—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors within a radiating element or between connected radiating elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0442—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular tuning means

Definitions

  • the present invention relates to an antenna of the type with radiating surface (s) plane (s).
  • the invention notably proposes an antenna of this type capable of being used in transmission / reception over at least two frequency bands.
  • planar antennas called PIFA ("Planar Inverted-F Antenna" or flat antenna type F inverted) which include, as illustrated by the figure 1 , a ground plane 1 and a flat conductive surface 2 which is superimposed on this ground plane 1, and extends to the right and parallel thereto.
  • PIFA Planar Inverted-F Antenna
  • Such an arrangement has a resonance wavelength which is a function of the dimensions of the plane conductive surface 2 and the height which separates it from its ground plane 1.
  • An object of the invention is to overcome the aforementioned drawbacks and to provide an antenna of the aforementioned type with an optimized gain for different channels in the same resonance band of the antenna.
  • Another object of the invention is also to provide an antenna with at least two transmission / reception bands which is of small size.
  • WO90 / 13152 an antenna structure that has two radiating elements, one that is used for transmission, the other that is used for reception. It is not intended to use a resonant circuit simultaneously over several frequency bands, switching to different sub-bands receiving by switching capacitive or inductive means.
  • the invention proposes a transmitting / receiving antenna according to claim 1.
  • the means defining an adaptation circuit are advantageously connected in parallel with capacitive or inductive means themselves connected in series with means capable of being selectively switched between an on state and a locked state, these capacitive or inductive means shifting the resonance bands of the antenna, depending on whether the means capable of being switched are in the on state or in the off state.
  • the two radiation surfaces are advantageously in the same plane.
  • the antenna is connected to the ground plane and an electronic RF signal supply and reception by two points on either side of a radiating section.
  • the adaptation circuit means are then split on one side and the other of the radiating sections.
  • the invention also relates to a mobile phone which comprises such an antenna.
  • a mobile phone structure comprising a housing in the bottom of which is disposed a ground plane and a loudspeaker electronics, structure in which said ground plane is extended by a shielding piece which has a recess upwards. speaker and which is the ground plane of an antenna of the aforementioned type whose or radiating sections are arranged in the housing on the side of the shielding piece opposite the speaker.
  • the antenna represented on the figure 3 comprises a ground plane 10 and two planar radiating elements 11 and 12 which extend superimposed on said ground plane 10, being parallel thereto and arranged in the same plane.
  • These two elements 11 and 12 are both rectangular sections. They are in this case aligned with each other and have the same width l. Their respective lengths, referenced L1 and L2, may be equal or different.
  • the radiating section 11 is connected on one side to the earth plane (connection point 13) and on the other side to an RF signal supply / reception electronics (connection point 14).
  • the two sections 11 and 12 are connected to each other by at least one circuit which allows the antenna to resonate on two frequency bands centered on the frequencies F1 and F2.
  • a plug circuit behaves substantially as a purely inductive element before its resonant frequency and as a purely capacitive element after its resonant frequency.
  • An assembly of the type shown on the figure 1 therefore operates with two resonance bands, which by varying the dimensions of the radiating sections and the height h, as well as on the values of the components L and C, can be centered on the two resonance frequencies F1 and F2.
  • the antenna that is illustrated on the figure 4 (with differences of scale of representations) takes over all the different elements of the assembly of the figure 3 .
  • a branch which comprises a capacitor C1 connected in series with a controlled switch element D, which in this case is a PIN diode.
  • a similar arrangement is connected in parallel with the plug circuit 18.
  • the two diodes D of these arrangements are controlled by a voltage signal CT transmitted through shock inductors Lc.
  • a protective capacitor C2 is furthermore provided between point 14 and the power supply / reception electronics associated with the antenna.
  • the assembly is equivalent to that of the figure 3 .
  • the plug circuits 17, 18 are modified by the presence of the capacitors C1 connected in parallel thereto, so that the frequencies of the two resonance bands then created are offset with respect to those obtained when the diodes D are blocked.
  • the values of the various components of the assembly which has just been described and in particular the inductive and capacitive values are chosen so that the resonant frequencies F1 and F2 correspond in one case to the "duplex" transmission frequencies.
  • TX curve in solid lines on the figure 5
  • reception frequencies "duplex" f RX dotted line curve on the figure 5 ).
  • the antenna is perfectly resonant for one and the other of the two bands and this both on transmission and on reception.
  • Such an antenna is advantageously integrated with a mobile phone structure, as illustrated on the figure 6 .
  • This mobile phone structure comprises in a housing B a card 19 which is arranged in the vicinity of the front face of the telephone housing and which carries the various keys 20 of the keyboard, control means of the screen 21 of the telephone, as well as means 22 forming a loudspeaker.
  • a metallization 23 which defines the neutral (or mass) of the mobile phone and to which the card 19 and any other cards of the telephone (card 24 on the figure 6 ) are connected.
  • This ground plane 23 is extended by a metal shield 25 which extends with a recess to the right of the means 22 forming a loudspeaker.
  • This metal shield 25 is used to make the ground plane of the antenna, the sections 11 and 12 thereof being arranged on the bottom of the housing B, to the right of the shield 25.
  • the volume occupied by the antenna assembly is minimal, the height h between the shield 25 and the radiating sections 11 and 12 being 8 mm or smaller.
  • a significant advantage of this configuration is that the shield effectively protects the user against electromagnetic radiation emitted by the antenna.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Waveguide Aerials (AREA)
  • Support Of Aerials (AREA)
  • Details Of Aerials (AREA)
  • Transceivers (AREA)
  • Telephone Set Structure (AREA)

Claims (9)

  1. Sende/Empfangs-Antenne, die folgendes umfasst: eine Masseebene (10) und eine Strahlungsfläche, die sich vor der Masseebene und parallel zu dieser erstreckt, dadurch gekennzeichnet, dass die ebene Strahlungsfläche wenigstens zwei ebene Strahlungsabschnitte (11, 12) umfasst, die miteinander durch Mittel verbunden sind, die eine Anpassungsschaltung definieren, die es der Antenne gestattet, sowohl beim Senden wie beim Empfangen gleichzeitig auf wenigstens zwei Bändern verschiedener Frequenz abzustrahlen, die auf Mittenfrequenzen F1 und F2 liegen, wobei die Mittel, die eine Anpassungsschaltung definieren, wenigstens einen Sperrkreis (17, 18) umfassen, der eine Resonanzfrequenz hat, die im Wesentlichen in der Mitte der Frequenzen F1 und F2 liegt.
  2. Antenne nach Anspruch 1, dadurch gekennzeichnet, dass die Mittel, die eine Anpassungsschaltung (17, 18) definieren, parallel zu kapazitiven oder induktiven Mitteln geschaltet sind, die ihrerseits in Reihe mit Mitteln geschaltet sind, die dazu geeignet sind, wahlweise zwischen einem Durchlasszustand und einem Sperrzustand umgeschaltet zu werden, wobei diese kapazitiven oder induktiven Mittel die Resonanzbänder der Antenne verschieben, und dies in Abhängigkeit vom durchlassenden oder gesperrten Zustand der Mittel, die dazu geeignet sind umgeschaltet zu werden.
  3. Antenne nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Strahlungsabschnitte in ein und derselben Ebene liegen.
  4. Antenne nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass sie über zwei Punkte auf beiden Seiten eines Strahlungsabschnitts mit der Masseebene und mit einer Elektronik zur RF-Versorgung/zum RF-Empfang verbunden ist.
  5. Antenne nach Anspruch 4, dadurch gekennzeichnet, dass die Mittel, die eine Anpassungsschaltung definieren, auf eine Seite und auf die andere der Strahlungsabschnitte aufgeteilt sind.
  6. Antenne nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, dass die Elektronik zur RF-Versorgung/zum RF-Empfang mit dem Strahlungsabschnitt über eine Kapazität verbunden ist.
  7. Antenne nach Anspruch 2, allein oder in Verbindung mit einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass die Mittel, die dazu geeignet sind wahlweise zwischen einem Durchlasszustand und einem Sperrzustand umgeschaltet zu werden, wenigstens eine PIN-Diode umfassen.
  8. Mobiltelefon, dadurch gekennzeichnet, dass es eine Antenne gemäß einem der vorhergehenden Ansprüche umfasst.
  9. Mobiltelefon, das ein Gehäuse umfasst, an dessen Rückseite eine Masseebene und eine Lautsprecherelektronik angeordnet sind, dadurch gekennzeichnet, dass die Masseebene durch ein Abschirmungsteil verlängert ist, das einen Absatz in Richtung des Lautsprechers hat und das die Masseebene einer Antenne gemäß einem der Ansprüche 1 bis 7 bildet, deren Strahlungsabschnitte im Gehäuse auf der zum Lautsprecher entgegengesetzt liegenden Seite des Abschirmungsteils angeordnet sind.
EP01958206A 2000-08-01 2001-07-31 Planare antenne für mobilfunkgeräte Expired - Lifetime EP1305845B9 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0010126A FR2812766B1 (fr) 2000-08-01 2000-08-01 Antenne a surface(s) rayonnante(s) plane(s) et telephone portable comportant une telle antenne
FR0010126 2000-08-01
PCT/FR2001/002498 WO2002011236A1 (fr) 2000-08-01 2001-07-31 Antenne a surface(s) rayonnante(s) plane(s) et telephone portable comportant une telle antenne

Publications (3)

Publication Number Publication Date
EP1305845A1 EP1305845A1 (de) 2003-05-02
EP1305845B1 EP1305845B1 (de) 2008-12-17
EP1305845B9 true EP1305845B9 (de) 2009-08-05

Family

ID=8853182

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01958206A Expired - Lifetime EP1305845B9 (de) 2000-08-01 2001-07-31 Planare antenne für mobilfunkgeräte

Country Status (6)

Country Link
US (1) US20030146873A1 (de)
EP (1) EP1305845B9 (de)
JP (1) JP2004505581A (de)
DE (1) DE60137047D1 (de)
FR (1) FR2812766B1 (de)
WO (1) WO2002011236A1 (de)

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US9484619B2 (en) 2011-12-21 2016-11-01 Pulse Finland Oy Switchable diversity antenna apparatus and methods
US8988296B2 (en) 2012-04-04 2015-03-24 Pulse Finland Oy Compact polarized antenna and methods
US9041619B2 (en) 2012-04-20 2015-05-26 Apple Inc. Antenna with variable distributed capacitance
US9979078B2 (en) 2012-10-25 2018-05-22 Pulse Finland Oy Modular cell antenna apparatus and methods
US10069209B2 (en) 2012-11-06 2018-09-04 Pulse Finland Oy Capacitively coupled antenna apparatus and methods
US9647338B2 (en) 2013-03-11 2017-05-09 Pulse Finland Oy Coupled antenna structure and methods
US10079428B2 (en) 2013-03-11 2018-09-18 Pulse Finland Oy Coupled antenna structure and methods
US9634383B2 (en) 2013-06-26 2017-04-25 Pulse Finland Oy Galvanically separated non-interacting antenna sector apparatus and methods
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Also Published As

Publication number Publication date
EP1305845A1 (de) 2003-05-02
FR2812766B1 (fr) 2006-10-06
EP1305845B1 (de) 2008-12-17
US20030146873A1 (en) 2003-08-07
FR2812766A1 (fr) 2002-02-08
WO2002011236A1 (fr) 2002-02-07
DE60137047D1 (de) 2009-01-29
JP2004505581A (ja) 2004-02-19

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