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WO2009130781A1 - Antenne plane - Google Patents

Antenne plane Download PDF

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Publication number
WO2009130781A1
WO2009130781A1 PCT/JP2008/057965 JP2008057965W WO2009130781A1 WO 2009130781 A1 WO2009130781 A1 WO 2009130781A1 JP 2008057965 W JP2008057965 W JP 2008057965W WO 2009130781 A1 WO2009130781 A1 WO 2009130781A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
base material
planar
elements
trunk
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.)
Ceased
Application number
PCT/JP2008/057965
Other languages
English (en)
Japanese (ja)
Inventor
智之 藤枝
雅美 鈴木
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.)
Pioneer Corp
Original Assignee
Pioneer Corp
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 Pioneer Corp filed Critical Pioneer Corp
Priority to PCT/JP2008/057965 priority Critical patent/WO2009130781A1/fr
Priority to CN2008801287158A priority patent/CN102007643A/zh
Priority to JP2010509008A priority patent/JPWO2009130781A1/ja
Publication of WO2009130781A1 publication Critical patent/WO2009130781A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • 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
    • H01Q1/1271—Supports; Mounting means for mounting on windscreens
    • 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
    • H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
    • H01Q5/25—Ultra-wideband [UWB] systems, e.g. multiple resonance systems; Pulse systems
    • 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
    • H01Q5/378—Combination of fed elements with parasitic elements
    • H01Q5/385—Two or more parasitic 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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
    • H01Q9/285—Planar dipole

Definitions

  • the present invention relates to a planar dipole antenna.
  • a film-like antenna used for pasting on a windshield of a vehicle is known. Examples of such a film antenna are described in Patent Documents 1 and 2.
  • the film antenna as described above generally has a structure in which a sheet on which an element is formed is attached to a windshield, and therefore cannot be reused after being attached once. For this reason, once a film-like antenna is pasted, the pasting position cannot be changed. Further, since the film antenna has an elongated sheet shape, the pasting operation is not always easy.
  • the body ground type antenna as described in Patent Document 1 needs to connect the ground wire to the metal body, so that the mounting position is restricted.
  • An object of the present invention is to provide a planar antenna that is easy to attach because its shape is small and simple, and that can be reused.
  • the invention according to claim 1 is a planar antenna, comprising a planar substrate made of a dielectric, and a pair of elements provided on the substrate, each of the elements comprising: It has the trunk part extended in the length direction of the base material, and a plurality of branch parts branched from the trunk part.
  • the planar antenna includes a planar base material made of a dielectric and a pair of elements provided on the base material, each of the elements being the base.
  • a trunk extending in a length direction of the material; and a plurality of branches branched from the trunk.
  • the antenna described above is configured by providing a pair of elements (conductive wires) such as metal on one surface of a planar substrate made of a dielectric.
  • This antenna constitutes a so-called dipole antenna by a pair of elements.
  • Each element has a trunk portion extending in the length direction of the base material and a plurality of branch portions branched from the trunk portion.
  • the plurality of branch portions are provided substantially symmetrically with the trunk portion as a center line.
  • the electrical characteristics as the antenna can be stabilized.
  • substantially symmetrical includes not only a symmetric shape but also a form in which a meander shape is partially formed as described later.
  • a part of the plurality of branch portions has a meander shape.
  • each of the elements has a feeding point at one end of the trunk, and the plurality of branches have a longer length as the distance from the feeding point increases.
  • the frequency characteristics can be expanded by making each element have a tapered shape.
  • the feeding point is provided at a position shifted in the end direction from the center position in the length direction of the base material.
  • planar antenna includes a non-excitation element provided on the base material and on a surface opposite to the surface on which the element is provided.
  • Another aspect includes a non-excitation element provided on the base material, on the same surface as the surface on which the element is provided, or on another surface.
  • Yet another embodiment includes a non-excitation element disposed on the base material and at a position not overlapping the element. Thereby, the frequency band of an antenna can be expanded using the resonance by the side of a non-excitation element.
  • the non-excitation element is provided at a position shifted from the center position in the length direction of the base material toward the feeding point.
  • FIG. 1 shows a configuration of a planar antenna 100 (hereinafter simply referred to as “antenna”) according to a first embodiment of the present invention.
  • 1A is a plan view of the surface of the antenna 100
  • FIG. 1B is a side view of the antenna 100
  • FIG. 1C is a plan view of the back surface of the antenna 100.
  • FIG. 1A is a plan view of the surface of the antenna 100
  • FIG. 1B is a side view of the antenna 100
  • FIG. 1C is a plan view of the back surface of the antenna 100.
  • the antenna 100 includes a planar (thin flat plate) substrate 1 and a pair of elements (conductors) 10 provided on one surface of the substrate 1.
  • the substrate 1 is made of a dielectric material such as a plastic film or rubber, but a rigid material (ceramics or the like) may be used.
  • the pair of elements 10 constitute a dipole antenna.
  • Each element 10 is formed of a metal such as silver or copper, and has a trunk portion 11 that extends in the length direction of the substrate 1, and a plurality of branch portions 12 that branch out in a direction substantially perpendicular to the trunk portion 11, and A feeding point 13 provided at one end of the trunk 11.
  • each element 10 has a corrugated shape or a fishbone-like shape (hereinafter referred to as “corrugated structure”) provided so that the plurality of branch portions 12 are substantially orthogonal to the trunk portion 11.
  • the element 10 can be electrically equivalent to one long linear element.
  • the area occupied by the antenna 100 in the mounted portion can be reduced. This is particularly effective when the antenna 100 is attached to a windshield or the like of a vehicle, because it becomes easy to arrange the attachment position of the antenna 100 outside the driver's field of view.
  • the pair of feeding points 13 are provided at positions shifted from the end of the base material 1 with respect to the center position in the length direction of the base material 1. Thereby, impedance matching can be taken and electric energy can be efficiently supplied from the feeding point to the antenna 100.
  • the plurality of branch portions 12 may be provided only on one side of the trunk portion 11, but in the first embodiment, they are provided symmetrically about the trunk portion 11 as a central axis as shown in the figure. In this way, by providing the plurality of branch portions 12 symmetrically with the trunk portion 11 as the central axis, the electrical characteristics as an antenna are stable compared to the case where the plurality of branch portions 12 are provided only on one side of the trunk portion 11. Can be
  • FIG. 2 shows a configuration of an antenna 100a according to the second embodiment of the present invention.
  • 2A is a plan view of the surface of the antenna 100a
  • FIG. 2B is a side view of the antenna 100a
  • FIG. 1C is a plan view of the back surface of the antenna 100a.
  • the antenna 100a according to the second embodiment is configured by providing a pair of elements 10a on a base material 1 made of a dielectric, like the antenna 100 according to the first embodiment.
  • the shape of each element 10a is different from that of the antenna 100 according to the first embodiment.
  • the antenna 100a of the second embodiment is the same as the antenna 100 of the first embodiment except for the shape of the element 10a.
  • the element 10 a includes a trunk portion 11, a plurality of branch portions 12 a extending in a direction substantially orthogonal to the trunk portion 11, and a feeding point 13.
  • the element 10a according to the second embodiment has a tapered shape in which the length of the branch portion 12a increases as the distance from the feeding point 13 increases. That is, the branch portion 12a located near the feeding point 13 has a shorter length in the direction perpendicular to the trunk portion 11, and the branch portion 12a located farther from the feeding point 13 has a length in the direction perpendicular to the trunk portion 11. It is getting longer.
  • the band of the antenna 100a can be widened by making the element 10a into a tapered shape.
  • FIG. 3A shows a frequency characteristic 51 of an antenna whose element is non-tapered as in the first embodiment, and a frequency characteristic 52 of an antenna whose element is tapered as in the second embodiment.
  • the taper angle ⁇ ( ⁇ 1 and ⁇ 2) indicating the degree of the taper shape of the element 100a is determined according to the target characteristic of the antenna 100a.
  • the antenna 100a according to the second embodiment is the same as the antenna 100 according to the first embodiment. That is, by adopting the corrugated structure, the entire antenna can be reduced in size.
  • the plurality of branch portions 12 are preferably provided symmetrically about the trunk portion 11 as a central axis, but may be provided only on one side of the trunk portion 11.
  • FIG. 4 shows the planar shapes of the antennas 100c and 100d according to the third embodiment of the present invention.
  • one or more non-excitation elements (non-feed elements) 20 are provided on the back surface of the substrate 1, that is, the surface opposite to the surface on which the element 10 is formed.
  • two non-excitation elements 20 are provided.
  • the surface of the antenna 100c is the same as that of the antenna 100 according to the first embodiment as shown in FIG. 4A, but the non-exciting element 20 is formed on the back surface as shown in FIG. Is provided.
  • a frequency characteristic of the antenna 100c is shown as a characteristic 61 in FIG.
  • the surface of the antenna 100d is the same as that of the antenna 100a of the second embodiment as shown in FIG. 4 (b), but the excitation element 20 is provided on the back surface as shown in FIG. 4 (c). ing.
  • the frequency characteristic of the antenna 100d is shown as a characteristic 62 in FIG.
  • the frequency characteristics of the antenna can be expanded.
  • the antenna can be broadened by double resonance caused by resonance by the elements on the front surface side of the antennas 100c and 100d and resonance by the non-excitation element on the back surface side.
  • the position of the non-excitation element 20 on the back surface of the base material 1 is a position shifted to the feeding point 13 side from the center position in the length direction of the base material 1.
  • an arrangement relationship is preferable in which the arrangement position of the feeding point 13 is placed at least at a part of the arrangement position of the non-excitation element 20.
  • the non-excitation element 20 is provided at a position shifted from the center position in the length direction of the base material 1 from the end on the side where the feeding point 13 is provided.
  • the non-excitation element 20 is not limited to this arrangement.
  • the non-excitation element 20 may be disposed on the same surface as the surface on which the element is disposed. In that case, as shown in FIG. 5B, the non-excitation element 20 may be arranged along the tapered shape of the element 10.
  • the non-excitation element 20 may be disposed on the side surface of the substrate 1.
  • 6A is a plan view of the antenna 100j when the non-excitation element 20 is disposed on both side surfaces of the substrate 1
  • FIG. 6B is the antenna 100j when viewed in the direction of the arrow 72 in FIG. 6A.
  • FIG. In the case where the non-excitation element 20 is disposed on the side surface of the substrate 1, one non-excitation element 20 may be provided only on one side surface.
  • FIG. 7A shows a planar shape of an antenna 100e according to one modification.
  • the interval between the branch portions 12e constituting the element 10e of the antenna 100e may not be constant. That is, the plurality of branch portions 12e may not be provided at equal intervals.
  • the branch portion 12e has a portion provided at the interval p1 and a portion provided at the interval p2 ( ⁇ p1).
  • FIG. 7B shows a planar shape of an antenna 100f according to another modification.
  • the width of the branch portion 12f in the length direction of the substrate 1 may not be constant.
  • the width W1 of the branch portion 12f in the area 61 is smaller than the width W2 of the branch portion 12f in the area 62.
  • FIG. 7C shows a planar shape of an antenna 100g according to still another modification.
  • a part of the element 10g may have a meander shape.
  • the trunk portion 11g is located at the approximate center in the width direction of the base material 1, but in the area 63, the position of the trunk portion 11g is alternately shifted in the width direction of the base material 1 to form a so-called meander shape.
  • the element 10 is not completely symmetric with respect to the center line passing through the trunk portion 11g, but “substantially symmetric” in the present embodiment is such a part of the meander.
  • the form which is a shape is also included.
  • FIG. 8 is a cross-sectional view showing an example of use of the antenna.
  • the protective layer 5 made of a resin or the like is provided on both surfaces (front and back surfaces) of the substrate 1 when used, and the double-sided adhesive sheet 7 such as a double-sided tape. It is affixed on the to-be-attached part 70 using.
  • a typical example of the mounted portion is a windshield of a vehicle.
  • the antennas 100 to 100j of the present invention are affixed to the attached portion 70 using an adhesive sheet such as a double-sided tape.
  • an adhesive sheet such as a double-sided tape.
  • the present invention can be used for a planar antenna that is used by being attached to a mounted portion.
  • the planar antenna is used by being attached to a windshield of a vehicle.

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  • Details Of Aerials (AREA)

Abstract

L'invention porte sur une antenne constituée de deux éléments (fils conducteurs) faits de métal ou analogue sur une surface d'une base plane faite d'un diélectrique. L’antenne et les deux éléments constituent une antenne dite dipôle. Chaque élément comprend une partie tronc s'étendant dans la direction longitudinale de la base et une pluralité de parties branches ramifiées à partir de la partie tronc. Une telle structure permet de gagner une longueur de trajet efficace car l'élément et l'antenne elle-même sont miniaturisés.
PCT/JP2008/057965 2008-04-24 2008-04-24 Antenne plane Ceased WO2009130781A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2008/057965 WO2009130781A1 (fr) 2008-04-24 2008-04-24 Antenne plane
CN2008801287158A CN102007643A (zh) 2008-04-24 2008-04-24 平面状天线
JP2010509008A JPWO2009130781A1 (ja) 2008-04-24 2008-04-24 平面状アンテナ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2008/057965 WO2009130781A1 (fr) 2008-04-24 2008-04-24 Antenne plane

Publications (1)

Publication Number Publication Date
WO2009130781A1 true WO2009130781A1 (fr) 2009-10-29

Family

ID=41216530

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/057965 Ceased WO2009130781A1 (fr) 2008-04-24 2008-04-24 Antenne plane

Country Status (3)

Country Link
JP (1) JPWO2009130781A1 (fr)
CN (1) CN102007643A (fr)
WO (1) WO2009130781A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110828993A (zh) * 2019-11-08 2020-02-21 深圳市安拓浦科技有限公司 一种透明薄膜天线及其制作方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1084212A (ja) * 1996-09-10 1998-03-31 Nippon Mektron Ltd 粘着機能付アンテナ
JP2005210456A (ja) * 2004-01-23 2005-08-04 Ngk Spark Plug Co Ltd 複数の周波数帯に対応可能なアンテナ
JP2005244778A (ja) * 2004-02-27 2005-09-08 Sharp Corp 小型アンテナ及びそれを備えた無線タグ
WO2006039699A2 (fr) * 2004-10-01 2006-04-13 De Rochemont L Pierre Module d'antenne en ceramique et ses procedes de fabrication

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN88211608U (zh) * 1988-04-08 1988-12-28 龚成 平板型电视接收天线
JP2006140789A (ja) * 2004-11-12 2006-06-01 Hitachi Cable Ltd 無視認アンテナ
CN101051705B (zh) * 2006-04-04 2011-06-29 黄启芳 碎形化天线
JP2008084307A (ja) * 2006-08-31 2008-04-10 Semiconductor Energy Lab Co Ltd 半導体装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1084212A (ja) * 1996-09-10 1998-03-31 Nippon Mektron Ltd 粘着機能付アンテナ
JP2005210456A (ja) * 2004-01-23 2005-08-04 Ngk Spark Plug Co Ltd 複数の周波数帯に対応可能なアンテナ
JP2005244778A (ja) * 2004-02-27 2005-09-08 Sharp Corp 小型アンテナ及びそれを備えた無線タグ
WO2006039699A2 (fr) * 2004-10-01 2006-04-13 De Rochemont L Pierre Module d'antenne en ceramique et ses procedes de fabrication

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110828993A (zh) * 2019-11-08 2020-02-21 深圳市安拓浦科技有限公司 一种透明薄膜天线及其制作方法

Also Published As

Publication number Publication date
JPWO2009130781A1 (ja) 2011-08-11
CN102007643A (zh) 2011-04-06

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