EP2099093A1 - Massebrücke, Antennenvorrichtung mit einer derartigen Massebrücke und eine tragbare Funkkommunikationsvorrichtung mit einer derartigen Antennenvorrichtung - Google Patents

Massebrücke, Antennenvorrichtung mit einer derartigen Massebrücke und eine tragbare Funkkommunikationsvorrichtung mit einer derartigen Antennenvorrichtung Download PDF

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Publication number
EP2099093A1
EP2099093A1 EP08445010A EP08445010A EP2099093A1 EP 2099093 A1 EP2099093 A1 EP 2099093A1 EP 08445010 A EP08445010 A EP 08445010A EP 08445010 A EP08445010 A EP 08445010A EP 2099093 A1 EP2099093 A1 EP 2099093A1
Authority
EP
European Patent Office
Prior art keywords
ground
ground plane
electrically conductive
bridge
conductive 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Withdrawn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
EP08445010A
Other languages
English (en)
French (fr)
Inventor
Christian Braun
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.)
Laird Technologies AB
Original Assignee
Laird Technologies AB
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 Laird Technologies AB filed Critical Laird Technologies AB
Priority to EP08445010A priority Critical patent/EP2099093A1/de
Publication of EP2099093A1 publication Critical patent/EP2099093A1/de
Withdrawn legal-status Critical Current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
    • 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
    • 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

Definitions

  • the present invention relates generally to antennas, and particularly to a ground bridge for an antenna device for a portable radio communication device, such as a mobile phone or similar.
  • the bandwidth of an on-ground antenna can preferably be increased by removing parts of the ground plane under the antenna, but when the parts of the ground plane is removed from under the antenna SAR is at the same time increased, which is undesirable.
  • PIFA in Figs. 1 and 2 an illustrative partly off-ground PIFA is shown, comprising a driven radiating element 1 having a feed 4 and a ground 5, and a parasitic element 2 having a ground 6.
  • the PIFA is partly off-ground a ground plane 3, made up by a printed wiring board.
  • PIFA in Fig 3 another illustrative partly off-ground PIFA is shown, comprising a driven radiating element 1 having a feed 4 and a ground 5, and a parasitic element 2 having a ground 6.
  • the PIFA is partly off-ground a ground plane 3, made up by a printed wiring board, which ground plane 3 is unevenly cut.
  • a ground bridge comprising an electrically conductive element and at least one ground plane connection portion, wherein the electrically conductive element is configured to be arranged in the same plane as a ground plane of a portable radio communication device comprising the ground bridge, and wherein the at least one ground plane connection portion is configured to electrically direct connect the electrically conductive element to the ground plane
  • improved design flexibility is achieved since the ground bridge is much more easily redesigned than the printed wiring board.
  • at least two ground plane connection portions it is easier to avoid undesired resonances in the ground bridge, which e.g. could increase SAR or interfere with desired antenna characteristics.
  • Another advantage with a ground bridge according to the present invention is that its use reduces influences to the antenna device from the user.
  • ground plane connection portions configured to connect the ground bridge to the ground plane on either side of the feed portion
  • the ground bridge is preferably configured to be snap-fitted to the ground plane, whereby positioning easily is achieved.
  • the ground plane is preferably made up of a printed wiring board of a portable radio communication device.
  • the printed wiring board preferably also comprises a straight edge across the portable radio communication device, off which edge the radiating element protrudes with its off ground part.
  • FIG. 4-5 illustrate an antenna device according to the present invention.
  • the antenna device comprises a driven radiating element 1 and a parasitic element 2.
  • the driven radiating element 1 has a feed portion 4 and a ground portion 5.
  • the parasitic element 2 has a ground portion 6, but no feed portion.
  • the ground portions 5 and 6 are connected to a ground plane 3, preferably made up by a printed wiring board of a portable radio communication device, such as a mobile phone, PDA, or similar device.
  • the feed portion 4 is connected to RF circuitry of the portable radio communication device.
  • the driven radiating element 1 and the parasitic element 2 are positioned partly off-ground the ground plane 3 and partly on ground the ground plane 3.
  • the antenna device further comprises a ground bridge including an electrically conductive element 7 and three ground connection portions 8.
  • the electrically conductive element 7 of the ground bridge is positioned in the off-ground part of the portable radio communication device, such that the electrically conductive element 7 is arranged between the feed portion 4 and a user of the portable radio communication device.
  • the electrically conductive element 7 is connected to the ground plane 3 through the three ground connection portions 8.
  • one ground connection portion 8 directly connects the electrically conductive element 7 to the ground plane 3
  • a second ground connection portion 8 connects the electrically conducive element 7 to the ground portion 5 of the driven radiating element 1
  • a third ground connection portion 8 connects the electrically conducive element 7 to the ground portion 6 of the parasitic element 2.
  • the ground bridge is preferably made up the same way as the rest of the antenna device, e.g. a flexfilm comprising electrically conductive portions, supported by a dielectric carrier.
  • a ground connection portion 8 going directly to the ground plane 3 require its own connector arrangement, whereas a ground connection portion that is connected via ground portion 5 of the driven radiating element 1 or ground portion 6 of the parasitic element 2 does not need a connector arrangement of its own since it is inherently connected to the ground plane 3.
  • the ground bridge could alternatively be included in the antenna device, wherein it could be a metal object snap-fitted into a carrier of the antenna device and then connected to the ground plane 3 by normal contacting means, such as clips or similar, or the metal object could itself create the connection. Further, the ground bridge is preferably snap fitted to the ground plane 3 and also to the ground portions 5 and 6 of the driven radiating element 1 and the parasitic element 2, respectively.
  • the ground connection portions 8 of the ground bridge are preferably arranged such that no part, or only small parts, of the electrically conductive element 7 protrudes out there from, in such a way that resonance could be generated therein, which would interfere with desired resonance frequencies of the antenna device. Further, the ground connection portions 8 of the ground bridge are preferably also arranged such that a slot created between the electrically conductive element 7 and the ground plane 3 is not tuned to any resonance frequency which would interfere with desired resonance frequencies of the antenna device.
  • ground connection portions Although three ground connection portions have been described, at least one is sufficient to give desired properties. However, at least two ground connection portions makes it easier to avoid undesired resonances in the ground bridge, and the more ground connection portions utilized the more stability of the ground bridge can be achieved.
  • FIG. 6-7 An alternative configuration of the ground bridge of the antenna device according to the first embodiment of the present invention is illustrated in Figs. 6-7 , wherein the ground bridge comprises two ground connection portions 8, arranged at opposing sides of the electrically conductive element 7.
  • FIG. 8 A second embodiment of the present invention will now be described with reference to Fig. 8 .
  • This second embodiment of the present invention is identical with the first embodiment described above, apart from the following.
  • the ground plane 3 does not exhibit a straight edge across the portable radio communication device, off which edge the radiating element 1 protrudes with its off-ground part.
  • the electrically conductive element 20 of the ground bridge is arranged in a part of the cut-out portion of the ground plane 3, to adapt e.g. for redesign late in design process of the antenna device.
  • the ground bridge comprises two ground plane connection portions 8 at opposing portions thereof.
  • FIG. 9 An alternative configuration of the ground bridge of the antenna device according to the second embodiment of the present invention is illustrated in Fig. 9 , wherein the ground bridge comprises only one ground connection portion 8.
  • the antenna device further comprises a floating bridge 9 connected to the ground bridge.
  • the connection to the ground bridge is through a low pass filter 10, which can be used to make the floating bridge look floating from an RF perspective.
  • the low pass filter 10 can e.g. consist of one lumped component, or comprise more complex filter solutions. Since low frequency and DC signals can pass the low pass filter the floating bridge 9 can contain components 11 like speakers, vibration devices, etc.
  • the floating bridge can also have further connections 12 to the ground plane 3 through filters.
  • the third embodiment of the present invention could easily be adapted to the configuration of the second embodiment of the present invention described above.
  • Radiating elements have in this description been illustrated with particular shapes, but for the present invention their particular shapes are not important and can have many different shapes. Further, the radiating elements have been described as partly on-ground and partly off-ground a ground plane, but the same principle with a ground bridge at desired positions is applicable also for a completely off-ground antenna, such as a monopole of an IFA (Inverted F-Antenna) antenna.
  • IFA Inverted F-Antenna

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)
EP08445010A 2008-03-05 2008-03-05 Massebrücke, Antennenvorrichtung mit einer derartigen Massebrücke und eine tragbare Funkkommunikationsvorrichtung mit einer derartigen Antennenvorrichtung Withdrawn EP2099093A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08445010A EP2099093A1 (de) 2008-03-05 2008-03-05 Massebrücke, Antennenvorrichtung mit einer derartigen Massebrücke und eine tragbare Funkkommunikationsvorrichtung mit einer derartigen Antennenvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08445010A EP2099093A1 (de) 2008-03-05 2008-03-05 Massebrücke, Antennenvorrichtung mit einer derartigen Massebrücke und eine tragbare Funkkommunikationsvorrichtung mit einer derartigen Antennenvorrichtung

Publications (1)

Publication Number Publication Date
EP2099093A1 true EP2099093A1 (de) 2009-09-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08445010A Withdrawn EP2099093A1 (de) 2008-03-05 2008-03-05 Massebrücke, Antennenvorrichtung mit einer derartigen Massebrücke und eine tragbare Funkkommunikationsvorrichtung mit einer derartigen Antennenvorrichtung

Country Status (1)

Country Link
EP (1) EP2099093A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2234203A1 (de) * 2009-03-26 2010-09-29 HTC Corporation Mobile Vorrichtung
EP2676324A1 (de) * 2011-02-18 2013-12-25 Laird Technologies, Inc. Planare inverted-f-antennen (pifa) mit mehreren frequenzbereichen und systeme mit verbesserter isolation
JP2015002384A (ja) * 2013-06-13 2015-01-05 株式会社ソニー・コンピュータエンタテインメント アンテナ装置およびそれを用いた電子機器
WO2015167445A3 (en) * 2014-04-29 2016-04-28 Hewlett-Packard Development Company, L.P. Antennas with bridged ground planes

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006031170A1 (en) * 2004-09-13 2006-03-23 Amc Centurion Ab Antenna device and portable radio communication device comprising such an antenna device
WO2006070017A1 (en) * 2004-12-30 2006-07-06 Fractus, S.A. Shaped ground plane for radio apparatus
WO2006084951A1 (en) * 2005-02-08 2006-08-17 Pulse Finland Oy Internal monopole antenna
WO2007054616A1 (en) * 2005-11-11 2007-05-18 Pulse Finland Oy Internal monopole antenna

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006031170A1 (en) * 2004-09-13 2006-03-23 Amc Centurion Ab Antenna device and portable radio communication device comprising such an antenna device
WO2006070017A1 (en) * 2004-12-30 2006-07-06 Fractus, S.A. Shaped ground plane for radio apparatus
WO2006084951A1 (en) * 2005-02-08 2006-08-17 Pulse Finland Oy Internal monopole antenna
WO2007054616A1 (en) * 2005-11-11 2007-05-18 Pulse Finland Oy Internal monopole antenna

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2234203A1 (de) * 2009-03-26 2010-09-29 HTC Corporation Mobile Vorrichtung
US8310400B2 (en) 2009-03-26 2012-11-13 Htc Corporation Mobile apparatus
EP2676324A1 (de) * 2011-02-18 2013-12-25 Laird Technologies, Inc. Planare inverted-f-antennen (pifa) mit mehreren frequenzbereichen und systeme mit verbesserter isolation
EP2676324A4 (de) * 2011-02-18 2014-10-22 Laird Technologies Inc Planare inverted-f-antennen (pifa) mit mehreren frequenzbereichen und systeme mit verbesserter isolation
TWI489690B (zh) * 2011-02-18 2015-06-21 Laird Technologies Inc 具有經改善隔絕的多頻帶平面倒ｆ型之天線及系統
US9065166B2 (en) 2011-02-18 2015-06-23 Laird Technologies, Inc. Multi-band planar inverted-F (PIFA) antennas and systems with improved isolation
US9472846B2 (en) 2011-02-18 2016-10-18 Laird Technologies, Inc. Multi-band planar inverted-F (PIFA) antennas and systems with improved isolation
TWI562457B (en) * 2011-02-18 2016-12-11 Laird Technologies Inc Multi-band planar inverted-f (pifa) antennas and systems with improved isolation
JP2015002384A (ja) * 2013-06-13 2015-01-05 株式会社ソニー・コンピュータエンタテインメント アンテナ装置およびそれを用いた電子機器
US9368864B2 (en) 2013-06-13 2016-06-14 Sony Corporation Antenna device and electronic apparatus using it
WO2015167445A3 (en) * 2014-04-29 2016-04-28 Hewlett-Packard Development Company, L.P. Antennas with bridged ground planes
US10340591B2 (en) 2014-04-29 2019-07-02 Hewlett-Packard Development Company, L.P. Antenna with bridged ground planes

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