EP1589606B1 - Passive Drahtstruktur zur Erhöhung der Verstärkung einer Fensterantenne - Google Patents

Passive Drahtstruktur zur Erhöhung der Verstärkung einer Fensterantenne Download PDF

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Publication number
EP1589606B1
EP1589606B1 EP04026430.1A EP04026430A EP1589606B1 EP 1589606 B1 EP1589606 B1 EP 1589606B1 EP 04026430 A EP04026430 A EP 04026430A EP 1589606 B1 EP1589606 B1 EP 1589606B1
Authority
EP
European Patent Office
Prior art keywords
antenna
segment
wirelike
passive
wire
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
EP04026430.1A
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English (en)
French (fr)
Other versions
EP1589606A1 (de
Inventor
Matteo Cerretelli
Andre Giere
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Ask Industries SpA
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Ask Industries SpA
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Publication of EP1589606A1 publication Critical patent/EP1589606A1/de
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    • 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
    • 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
    • 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
    • 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

Definitions

  • U.S. Patent No. 6.369,767 discloses an FM antenna characterised by dimensions that can be considered compatible with those to which the present invention relates to.
  • the structure of the antenna disclosed in this patent doesn't have any optimization in order to avoid reduction of the gain by the interaction with the surrounding metal body.
  • it requires an additional wire in order to receive the AM signal because the FM antenna is a loop antenna and its grounding on one side is not compatible with the receiving of AM signals.
  • a passive wirelike structure for increasing the gain of a window antenna for vehicles is known from US-A-2004/008 144 .
  • the disclosed passive wirelike structure has the features of the preamble of claim 1.
  • the object of the present invention is to solve the above drawbacks.
  • the object of the present invention is to provide a AM-FM antenna having improved performances when located on small window.
  • a further object of the present invention is to provide an AM-FM antenna which can also be used for other applications with different operative frequencies, like GSM (Global System Mobile) telephone antennas placed on a conductive windscreen within a small non-conductive area.
  • GSM Global System Mobile
  • a further object of the present invention is to provide an AM-FM antenna suitable to be integrated in a free space smaller than those necessary for other solution as being able to reduce for FM waves the negative influence carried out by the surrounding metal body on the antenna gain.
  • a passive wirelike structure comprising at least one conductive wirelike segment constituted by metallic tracks, arranged on the window glass provided with the antenna and connected to the metallic chassis delimiting the window; said at least one conductive wirelike segment having a length substantially equal to one quarter of the working wavelength of the antenna and being arranged between said antenna and the metallic border of the metallic chassis delimiting the window glass; wherein said passive wirelike structure is constituted by four wire conductive segments: a first wire conductive segment is connected at one end to the metallic border of the chassis surrounding the window glass; a second conductive wire segment is connected to the first segment and arranged parallel to the next edge of the window glass; and a third segment connecting said second wire segment with a fourth segment, this latter wire segment being arranged parallel to the second wire segment and between the next edge of the window glass and said second wire segment.
  • the passive wirelike structure improves the gain of the antenna by changing the intrinsic resonance of the window.
  • antenna a monopole structure optimised to be small, for example, by using a fractal shaped profile.
  • the passive wirelike structure is completely separated from the antenna giving more degree of freedom in the definition and optimisation of the antenna that best cover the required specifications.
  • the wirelike passive structure is placed between the antenna and the edge of the conductive chassis delimiting the window glass and connected to this one so that it changes the interaction between the antenna and the surrounding metal body.
  • the number of the used wirelike passive structures 4a -4d , 6a - 6d is variable in function of the available space of the window glass 1 and of the antenna type.
  • Figure 5 shows another application where the wirelike passive structure of the present invention is useful to improve the quality of an antenna.
  • the constellation shown in figure 5 is a windscreen 9 with a reflecting layer able to screen the IR frequencies over nearly the whole area of the window.
  • the IR reflecting layer is constituted by a conductive metallic layer, which extends on all the surface of the windscreen except a limited zone for the application of the antenna 8 without interferring with the function of the antenna.
  • the structure of the present invention can be used to reduce the coupling effects between the antenna and the IR reflecting layer 9.
  • the wire segments 4 and 6 are connected to the reflecting layer 9 either directly or using a capacitive coupling.
  • the lengths of the wire segments 4 and 6 are also approximately equal to a quarter of the used wavelength of the antenna and are placed with the same criteria of those illustrated in figs. 1 -4 .

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  • Details Of Aerials (AREA)

Claims (4)

  1. Anordnung zur Erhöhung des Gewinns einer Antenne (8) für Fahrzeugfenster, wobei die Anordnung Folgendes umfasst:
    - eine Glasscheibe (1) des Fensters;
    - eine Metallkarosserie (2), die die Glasscheibe (1) begrenzt;
    - eine Antenne (8), die an der Glasscheibe (1) angebracht ist und ein Versorgungsende (7) aufweist;
    - eine passive Drahtstruktur, umfassend wenigstens ein aus metallischen Bahnen bestehendes, leitendes Drahtsegment (4a-4d, 6a-6d), das auf der Glasscheibe (1) angeordnet und mit der Metallkarosserie (2) mittels Verbindungsstellen (3, 5) verbunden ist, wobei das wenigstens eine leitende Drahtsegment (4a-4d, 6a-6d) eine Länge aufweist, die im Wesentlichen einem Viertel der Arbeitswellenlänge der Antenne (8) entspricht, und zwischen der Antenne (8) und dem Metallrand der Metallkarosserie (2) angeordnet ist, die die Glasscheibe (1) begrenzt;
    dadurch gekennzeichnet, dass
    die passive Drahtstruktur aus vier leitenden Drahtsegmenten besteht: ein erstes leitendes Drahtsegment (4a, 6a), das mittels Verbindungsstelle (3, 5) ein einem Ende mit dem Metallrand der die Glasscheibe (1) umgebenden Karosserie verbunden ist; ein zweites leitendes Drahtsegment (4b, 6b), das mit dem ersten Segment (4a, 6a) verbunden und parallel zu einem Rand der Glasscheibe (1) angeordnet ist, wobei der Rand der Seite entspricht, an der die passive Drahtstruktur mit dem ersten leitenden Drahtsegment (4a, 6a) verbunden ist; und ein drittes Segment (4c, 6c), welches das zweite leitende Drahtsegment (4b, 6b) mit einem vierten Segment (4d, 6d) verbindet, wobei das letzte Drahtsegment parallel zum zweiten Drahtsegment (4b, 6b) und zwischen dem Rand der Glasscheibe (1) und dem zweiten Drahtsegment (4b, 6b) angeordnet ist;
    die passive Drahtstruktur vollkommen von der Antenne (8) getrennt ist; und
    das wenigstens eine leitende Drahtsegment (4a - 4d, 6a - 6d) derart ausgerichtet ist, dass die Verbindungsstelle (3, 5) mit der Karosserie (2) sich auf der gegenüberliegenden Seite des Versorgungsendes (7) der Antenne (8) in Bezug auf die passiven Segmente befindet.
  2. Anordnung nach Anspruch 1, dadurch gekennzeichnet, dass die Länge des vierten Drahtsegments (4d) kürzer als die des zweiten Drahtsegments (4b) ist.
  3. Anordnung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass sie ferner eine IR-reflektierende Schicht (9) umfasst, die in der Lage ist, die IR-Frequenzen abzuschirmen und aus einer leitenden Metallschicht besteht, die sich über die gesamte Oberfläche der Glasscheibe (1) erstreckt, mit Ausnahme eines begrenzten Bereichs zur Anbringung der Antenne (8), und die Drahtsegmente mit der reflektierenden Schicht (9) verbunden sind und die Glasscheibe die Windschutzscheibe eines Fahrzeugs ist.
  4. Anordnung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass sie ferner eine IR-reflektierende Schicht (9) umfasst, die in der Lage ist, die IR-Frequenzen abzuschirmen und aus einer leitenden Metallschicht besteht, die sich über die gesamte Oberfläche der Glasscheibe (1) erstreckt, mit Ausnahme eines begrenzten Bereichs zur Anbringung der Antenne, und die Drahtsegmente mit der reflektierenden Schicht verbunden sind und die Glasscheibe die Heckscheibe eines Fahrzeugs ist.
EP04026430.1A 2004-04-22 2004-11-08 Passive Drahtstruktur zur Erhöhung der Verstärkung einer Fensterantenne Expired - Lifetime EP1589606B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRE20040037 2004-04-22
IT000037A ITRE20040037A1 (it) 2004-04-22 2004-04-22 Struttura filiforme passiva finalizzata all'incremento del guadagno di una antenna a vetro per veicolo

Publications (2)

Publication Number Publication Date
EP1589606A1 EP1589606A1 (de) 2005-10-26
EP1589606B1 true EP1589606B1 (de) 2018-09-19

Family

ID=34927277

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04026430.1A Expired - Lifetime EP1589606B1 (de) 2004-04-22 2004-11-08 Passive Drahtstruktur zur Erhöhung der Verstärkung einer Fensterantenne

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EP (1) EP1589606B1 (de)
IT (1) ITRE20040037A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100939704B1 (ko) * 2008-01-03 2010-02-01 (주) 모토텍 차량용 프랙탈 안테나
JP6169586B2 (ja) 2011-10-28 2017-07-26 コーニング インコーポレイテッド 赤外線反射能を有するガラス物品および同物品を製造する方法
CN107531562B (zh) 2015-04-30 2021-05-28 康宁股份有限公司 具有离散的金属银层的导电制品及其制造方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10163727A (ja) * 1996-11-28 1998-06-19 Asahi Glass Co Ltd 車両用ガラスアンテナ
US6822613B2 (en) * 2002-07-03 2004-11-23 Asahi Glass Company, Limited High frequency wave glass antenna for an automobile
TW574771B (en) * 2002-07-16 2004-02-01 Yen Tjing Ling Ind Dev Foundat Multi-band mono-input complex winding antenna

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
ITRE20040037A1 (it) 2004-07-22
EP1589606A1 (de) 2005-10-26

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