EP2215685B1 - Antenna arrangement and method - Google Patents

Antenna arrangement and method Download PDF

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Publication number
EP2215685B1
EP2215685B1 EP08804940.8A EP08804940A EP2215685B1 EP 2215685 B1 EP2215685 B1 EP 2215685B1 EP 08804940 A EP08804940 A EP 08804940A EP 2215685 B1 EP2215685 B1 EP 2215685B1
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EP
European Patent Office
Prior art keywords
conductor structure
conductor
signals
antenna arrangement
antenna
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EP08804940.8A
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German (de)
French (fr)
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EP2215685A1 (en
Inventor
Rainer Kuehne
Michael Thole
Urs Natzschka
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Continental Advanced Antenna GmbH
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Blaupunkt Antenna Systems GmbH and Co KG
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Publication of EP2215685A1 publication Critical patent/EP2215685A1/en
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    • 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
    • H01Q1/1278—Supports; Mounting means for mounting on windscreens in association with heating wires or layers

Definitions

  • the invention relates to an antenna arrangement or a method according to the preamble of the independent claims.
  • the heating field serves as an antenna for the reception of FM signals (FM signals).
  • FM signals FM signals
  • AM signals LMK signals
  • the US 4,954,797 A discloses an antenna for a vehicle window comprising an anti-fog heater is coupled.
  • the anti-fog heating device comprises a plurality of heating strips which extend between two laterally arranged busbars, via which the heating strips are energized.
  • a first auxiliary line is electrically connected to one of the bus bars, and an antenna conductor pattern having horizontal and vertical conductor patterns is disposed adjacent to this auxiliary line.
  • the auxiliary cable can not be used to heat the vehicle window.
  • the US 6,239,758 B1 discloses a vehicle window antenna system in which a heater panel is provided for receiving FM signals, and in which another antenna structure disposed adjacent to the heater panel is provided for receiving AM signals.
  • the heating device is connected via a separate first electrical line to an FM amplifier and, moreover, via a second electrical line to a current source for energizing the heating device, and the AM receiving device is connected via an additional third separate electrical line to an AM amplifier connected.
  • the EP 1 168 888 A2 discloses a vehicle window glass and a method of manufacturing this vehicle window glass.
  • the vehicle window glass includes a conductive film that is applied to the vehicle window glass, and is exposed to an electric current, so that the film serves as an anti-fog device.
  • the thickness of the film is variable, so that the specific electrical conductivity of the film or the film can be varied as desired, so that the entire vehicle window pane can be heated uniformly.
  • the EP 0 375 331 A2 discloses an apparatus for producing a conductive pattern for a heating line structure. This document discloses that individual heat conductors can be made variable both in their thickness and in their width extension, so that a uniform heating of a window pane is possible.
  • both a heating of the entire disk is possible as well as the accommodation of a separate antenna structure.
  • Opposite the US 6,307,516 B1 results in the advantage that also in the region of the second conductor structure, a heating of the disc is possible, with only one heating circuit is provided.
  • the conductor structure on the disk must not be decoupled from the vehicle electrical system via blocking circuits with high frequency or a second heating circuit must be provided.
  • integration of at least one antenna structure electrically decoupled from the heating field is possible.
  • Another advantage is the crossing-free arrangement of the second conductor structure in the loops of a heat conductor. Additional complex contact bridges are unnecessary.
  • the first and second conductor structure By arranging the first and second conductor structure on the same side of the disk, all structures can advantageously be applied with the same screen printing.
  • a uniform heating can be achieved in that the loop-shaped heating conductor is designed by varying its width so that the resistance value is equal to the other heating conductors.
  • the second conductor structure for capacitively coupling with the first conductor structure.
  • the Wienleiterfeld can be shared as an antenna structure without complex AM blocking circuits are necessary.
  • the first conductor structure can be used as an FM antenna structure and the second conductor structure as an AM antenna conductor structure, it being possible to design the first conductor structure for FM diversity reception.
  • the second conductor structure can also be used for the high-frequency connection of an impedance network for influencing the directivity for the FM reception via the second conductor structure coupled to the first conductor structure in terms of high frequency. This saves separate contacts for the connection of this impedance network.
  • the second conductor structure can be designed both for a frequency range of FM and AM signals. It is also possible to accommodate a further conductor structure in a comb-like manner in a further loop-shaped heating conductor, if different frequency ranges are to be decoupled from one another or different orientations of the antenna conductor structure are desired for different polarizations.
  • the antenna arrangement according to the invention consists of a first conductor structure 1 on a window pane 2, preferably the rear window of a motor vehicle, and of a second conductor structure 3.
  • the conductor structure 1 is formed by the heating field for heating the window pane 2. This consists of the parallel running in the horizontal direction of the heating wires 4 and the vertical bus bars 5, in which the heating current is fed.
  • At least one conductor 41 of the heating field runs in a loop between the actual heating field and the outer edge 6 of the disc 5, which is usually formed as a metallic frame.
  • the loops 7 of the conductor 41 run essentially in a horizontal direction parallel to the actual heating wires 4.
  • the upper end of the loops 7 is guided over a vertical conductor section on the right busbar.
  • the second conductor structure 3 protrudes like a comb into the loops 7 formed by the conductor 41.
  • the ladder structure is 3 galvanically separated from the first conductor structure 1 and thus from the heating field. There are therefore no blocking circuits for high-frequency decoupling of the conductor structure 3 from the electrical system required.
  • the first conductor pattern 1 and the second conductor pattern 3 can preferably be applied on the same disk side in the same screen printing.
  • the conductor structure 3 can be used both for a frequency range for receiving AM signals, z. B. in the LMK area, as well as for the reception of FM signals, z. B. in the FM area, be designed, for. B. by different lengths of the fingers 31, which protrude into the loops 7.
  • the conductor pattern 3 may be provided only for receiving AM signals and the conductor pattern 1 only for receiving FM signals. In this case, at least a cost and weight-intensive AM blocking circuit for electrical system decoupling is unnecessary. If the conductor structure 3 is designed to receive FM signals, the heating field for the reception of FM signals can be shared via a suitable capacitive coupling between at least one of the fingers 31 and the loops 7 of the conductor 41.
  • an impedance network 10 is then connected to the connection point 11 of the second conductor structure in the base 12 of the FM antenna structure via a diversity evaluation device 9 assigned to the FM reception device 8.
  • a diversity evaluation device 9 assigned to the FM reception device 8.
  • the directivity changes with FM reception, which again allows undisturbed FM reception.
  • the AM receiving device 13 is ineffective in FM reception from the connection point 11.
  • FIG. 2 shows a further embodiment of the invention.
  • the conductor 41 has on the conductor section on the upper edge of the disc 2 a secondary circuit in the form of the conductor 42, which is also designed loop-shaped.
  • the z. B. is designed for AM reception when the second conductor pattern 3 is designed for FM reception.
  • the loops 71 of the conductor 42 extend in the vertical direction.
  • the further conductor structure 14 can also be used / shared for another FM frequency range, eg for C2x (vehicle to vehicle communication or vehicle for infrastructure communication) in contrast to FM radio reception or TV reception. Due to the different orientation of the loops 7 and 21 and thus also of the conductor structures 3 and 14, an improved separation at differently polarized transmit and receive signals is possible. This different orientation of the conductor structure 3 and 14 can also be used for diversity reception, ie the diversity evaluation device 9 switches over in each case to that conductor loop 3 or 14 which offers the best reception. This switching can also be combined with the connection or disconnection of the impedance network 10, resulting in a total of four virtual FM antenna beam characteristics.
  • C2x vehicle to vehicle communication or vehicle for infrastructure communication
  • the disc 2 is to be heated evenly, make sure that the loop-shaped conductor 41 of the FIG. 1 despite its extension for looping the same resistance value as the other heating wires 4 of the heating field. This can be achieved most easily by varying its width relative to the other heating wires 4, such that a higher heating current flows through it in order to achieve the same heating power. This must also be the case for the width of the conductor 42 FIG. 2 be taken into account in the secondary circuit of the conductor 41.

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Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Antennenanordnung oder einem Verfahren nach Gattung der unabhängigen Ansprüche.The invention relates to an antenna arrangement or a method according to the preamble of the independent claims.

Aus der US 6,307,516 B1 ist bereits eine solche Antennenanordnung bekannt. Dort dient das Heizfeld als Antenne für den Empfang von UKW-Signalen (FM-Signalen). Zwischen dem oberen Rand der Kraftfahrzeug-Fensterscheibe und dem Heizfeld befindet sich eine separate, nicht mit dem Heizfeld galvanisch verbundene Leitungsstruktur als Antenne für den Empfang von LMK-Signalen (AM-Signalen).From the US 6,307,516 B1 already such an antenna arrangement is known. There, the heating field serves as an antenna for the reception of FM signals (FM signals). Between the upper edge of the motor vehicle window pane and the heating field there is a separate line structure, which is not galvanically connected to the heating field, as an antenna for receiving LMK signals (AM signals).

Es sind auch Heizstrukturen bekannt, bei denen das komplette Heizfeld als Antenne für AM- und FM-Signale genutzt wird, z.B. gemäß EP 1 076 375 A2 .There are also known heating structures in which the entire heating field is used as an antenna for AM and FM signals, eg according to EP 1 076 375 A2 ,

Die US 4,954,797 A offenbart eine Antenne für ein Fahrzeugfenster, die mit einer Antibeschlagheizseinrichtung gekoppelt ist. Die Antibeschlagheizseinrichtung umfasst mehrere Heizstreifen, die zwischen zwei seitlich angeordneten Sammelschienen verlaufen, über die die Heizstreifen bestromt werden. Eine erste Hilfsleitung ist mit einer der Sammelschienen elektrisch verbunden, und eine Antennenleiterstruktur mit horizontal und vertikal verlaufenden Leiterstrukturen ist benachbart zu dieser Hilfsleitung angeordnet. Die Hilfsleitung kann nicht zum Beheizen der Fahrzeugscheibe verwendet werden.The US 4,954,797 A discloses an antenna for a vehicle window comprising an anti-fog heater is coupled. The anti-fog heating device comprises a plurality of heating strips which extend between two laterally arranged busbars, via which the heating strips are energized. A first auxiliary line is electrically connected to one of the bus bars, and an antenna conductor pattern having horizontal and vertical conductor patterns is disposed adjacent to this auxiliary line. The auxiliary cable can not be used to heat the vehicle window.

Die US 6,239,758 B1 offenbart ein Fahrzeugfensterantennensystem, bei dem ein Heizfeld für den Empfang von FM-Signalen vorgesehen ist, und bei dem eine weitere Antennenstruktur, die benachbart zum Heizfeld angeordnet ist, für den Empfang von AM-Signalen vorgesehen ist. Dabei ist die Heizeinrichtung über eine separate erste elektrische Leitung mit einem FM-Verstärker und darüber hinaus über eine zweite elektrische Leitung mit eine Stromquelle zum Bestromen der Heizeinrichtung verbunden, und die AM-Empfangseinrichtung ist über eine weitere dritte separate elektrische Leitung mit einem AM-Verstärker verbunden.The US 6,239,758 B1 discloses a vehicle window antenna system in which a heater panel is provided for receiving FM signals, and in which another antenna structure disposed adjacent to the heater panel is provided for receiving AM signals. In this case, the heating device is connected via a separate first electrical line to an FM amplifier and, moreover, via a second electrical line to a current source for energizing the heating device, and the AM receiving device is connected via an additional third separate electrical line to an AM amplifier connected.

Die EP 1 168 888 A2 offenbart ein Fahrzeugfensterglas und ein Verfahren zum Herstellen dieses Fahrzeugfensterglases. Das Fahrzeugfensterglas umfasst einen leitenden Film, der auf dem Fahrzeugfensterglas aufgebracht wird, und der mit einem elektrischen Strom beaufschlagbar ist, so dass der Film als eine Antibeschlageinrichtung dient. Die Dicke des Films ist variabel ausgestaltet, so dass die spezifische elektrische Leitfähigkeit des Films bzw. der Folie wie gewünscht variiert werden kann, so dass die gesamte Fahrzeugfensterscheibe gleichmäßig beheizt werden kann.The EP 1 168 888 A2 discloses a vehicle window glass and a method of manufacturing this vehicle window glass. The vehicle window glass includes a conductive film that is applied to the vehicle window glass, and is exposed to an electric current, so that the film serves as an anti-fog device. The thickness of the film is variable, so that the specific electrical conductivity of the film or the film can be varied as desired, so that the entire vehicle window pane can be heated uniformly.

Die EP 0 375 331 A2 offenbart eine Vorrichtung zum Herstellen eines Leitungsmusters für eine Heizleitungsstruktur. Dieses Dokument offenbart, dass einzelne Heizleiter sowohl in ihrer Dickenerstreckung als auch in ihrer Breitenerstreckung variabel gestaltet werden können, damit eine gleichmäßige Beheizung einer Fensterscheibe möglich ist.The EP 0 375 331 A2 discloses an apparatus for producing a conductive pattern for a heating line structure. This document discloses that individual heat conductors can be made variable both in their thickness and in their width extension, so that a uniform heating of a window pane is possible.

Offenbarung der ErfindungDisclosure of the invention Vorteile der ErfindungAdvantages of the invention

Mit der erfindungsgemäßen Antennenanordnung bzw. dem Verfahren ist sowohl eine Beheizung der ganzen Scheibe möglich als auch die Unterbringung einer separaten Antennenstruktur. Gegenüber der US 6,307,516 B1 ergibt sich der Vorteil, dass auch im Bereich der zweiten Leiterstruktur eine Beheizung der Scheibe möglich ist, wobei nur ein Heizkreis vorzusehen ist. Gegenüber der Struktur der EP 1 076 375 A2 muss die Leiterstruktur auf der Scheibe nicht über Sperrkreise hochfrequenzmäßig vom Bordnetz entkoppelt werden oder ein zweiter Heizkreis vorgesehen sein. Insbesondere bei geringen Scheibengrößen ist eine Integration mindestens einer vom Heizfeld galvanisch entkoppelten Antennenstruktur möglich. Ein weiterer Vorteil ist die kreuzungsfreie Anordnung der zweiten Leiterstruktur in den Schleifen eines Heizleiters. Zusätzliche aufwendige Kontaktbrücken sind dadurch entbehrlich.With the antenna arrangement according to the invention or the method both a heating of the entire disk is possible as well as the accommodation of a separate antenna structure. Opposite the US 6,307,516 B1 results in the advantage that also in the region of the second conductor structure, a heating of the disc is possible, with only one heating circuit is provided. Opposite the structure of EP 1 076 375 A2 the conductor structure on the disk must not be decoupled from the vehicle electrical system via blocking circuits with high frequency or a second heating circuit must be provided. Especially with small pane sizes, integration of at least one antenna structure electrically decoupled from the heating field is possible. Another advantage is the crossing-free arrangement of the second conductor structure in the loops of a heat conductor. Additional complex contact bridges are unnecessary.

Durch die Anordnung der ersten und zweiten Leiterstruktur auf der gleichen Scheibenseite können alle Strukturen vorteilhaft mit demselben Siebdruck aufgebracht werden. Vorteilhaft lässt sich eine gleichmäßige Beheizung dadurch erzielen, dass der schleifenförmig verlaufende Heizleiter durch Variation seiner Breite so ausgeführt ist, dass der Widerstandswert jeweils gleich ist gegenüber den übrigen Heizleitern.By arranging the first and second conductor structure on the same side of the disk, all structures can advantageously be applied with the same screen printing. Advantageously, a uniform heating can be achieved in that the loop-shaped heating conductor is designed by varying its width so that the resistance value is equal to the other heating conductors.

Vorteilhaft ist es zumindest die zweite Leiterstruktur dafür auszulegen, mit der ersten Leiterstruktur kapazitiv zu koppeln. Damit kann das Heizleiterfeld als Antennenstruktur mitbenutzt werden, ohne dass aufwendige AM-Sperrkreise notwendig sind. Vorteilhaft kann die erste Leiterstruktur als FM-Antennenstruktur und die zweite Leiterstruktur als AM-Antennenleiterstruktur benutzt werden, wobei die Möglichkeit besteht, die erste Leiterstruktur für einen FM-Diversity-Empfang auszulegen. Die zweite Leiterstruktur kann dabei auch für die hochfrequenzmäßige Zuschaltung eines Impedanznetzwerkes zur Beeinflussung der Richtwirkung für den FM-Empfang über die hochfrequenzmäßig mit der ersten Leiterstruktur gekoppelte zweite Leiterstruktur verwendet werden. Dies erspart separate Kontaktierungen für die Anschaltung dieses Impedanznetzwerkes.It is advantageous at least to design the second conductor structure for capacitively coupling with the first conductor structure. Thus, the Heizleiterfeld can be shared as an antenna structure without complex AM blocking circuits are necessary. Advantageously, the first conductor structure can be used as an FM antenna structure and the second conductor structure as an AM antenna conductor structure, it being possible to design the first conductor structure for FM diversity reception. The second conductor structure can also be used for the high-frequency connection of an impedance network for influencing the directivity for the FM reception via the second conductor structure coupled to the first conductor structure in terms of high frequency. This saves separate contacts for the connection of this impedance network.

Soll überhaupt auf eine hochfrequenzmäßige Kopplung zum Heizfeld verzichtet werden, so kann die zweite Leiterstruktur sowohl für einen Frequenzbereich von FM- als auch von AM-Signalen ausgelegt werden. Es ist auch möglich eine weitere Leiterstruktur in einem weiteren schleifenförmig ausgebildeten Heizleiter kammartig unterzubringen, wenn verschiedene Frequenzbereiche voneinander entkoppelt sein sollen oder für verschiedene Polarisationen unterschiedliche Ausrichtungen der Antennenleiterstruktur erwünscht sind.If it is even necessary to dispense with a high-frequency coupling to the heating field, the second conductor structure can be designed both for a frequency range of FM and AM signals. It is also possible to accommodate a further conductor structure in a comb-like manner in a further loop-shaped heating conductor, if different frequency ranges are to be decoupled from one another or different orientations of the antenna conductor structure are desired for different polarizations.

Beschreibung der ZeichnungenDescription of the drawings

Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:

Figur 1
eine erste Antennenanordnung nach der Erfindung mit einer im Wesentlichen horizontal ausgebildeten Antennenleiterstruktur,
Figur 2
eine Ausgestaltung der Antennenanordnung nach der Erfindung mit horizontal und vertikal ausgebildeten Antennenleiterstrukturen.
Embodiments of the invention are illustrated in the drawings and explained in more detail in the following description. Show it:
FIG. 1
a first antenna arrangement according to the invention with a substantially horizontally formed antenna conductor structure,
FIG. 2
an embodiment of the antenna arrangement according to the invention with horizontally and vertically formed antenna conductor structures.

Ausführungsformen der ErfindungEmbodiments of the invention

Wie Figur 1 zeigt, besteht die Antennenanordnung nach der Erfindung aus einer ersten Leiterstruktur 1 auf einer Fensterscheibe 2 vorzugsweise der Heckscheibe eines Kraftfahrzeugs sowie aus einer zweiten Leiterstruktur 3 . Die Leiterstruktur 1 wird durch das Heizfeld zum Beheizen der Fensterscheibe 2 gebildet. Dieses besteht aus den parallel in horizontaler Richtung verlaufenden Heizdrähten 4 und den vertikalen Sammelschienen 5 , in die der Heizstrom eingespeist wird. Mindestens ein Leiter 41 des Heizfeldes verläuft schleifenförmig zwischen dem eigentlichen Heizfeld und dem Außenrand 6 der Scheibe 5 , der meist als metallischer Rahmen ausgebildet ist. Die Schleifen 7 des Leiters 41 verlaufen im Wesentlichen in horizontaler Richtung parallel zu den eigentlichen Heizdrähten 4 . Das obere Ende der Schleifen 7 ist über einen vertikalen Leiterabschnitt auf die rechte Sammelschiene geführt. Die zweite Leiterstruktur 3 ragt kammartig in die vom Leiter 41 gebildeten Schleifen 7 hinein. Somit ist die Leiterstruktur 3 galvanisch von der ersten Leiterstruktur 1 und damit vom Heizfeld getrennt. Es sind daher keine Sperrkreise zur hochfrequenzmäßigen Entkopplung der Leiterstruktur 3 vom Bordnetz erforderlich. Die erste Leiterstruktur 1 und die zweite Leiterstruktur 3 können vorzugsweise auf der gleichen Scheibenseite im selben Siebdruck aufgebracht werden.As FIG. 1 1, the antenna arrangement according to the invention consists of a first conductor structure 1 on a window pane 2, preferably the rear window of a motor vehicle, and of a second conductor structure 3. The conductor structure 1 is formed by the heating field for heating the window pane 2. This consists of the parallel running in the horizontal direction of the heating wires 4 and the vertical bus bars 5, in which the heating current is fed. At least one conductor 41 of the heating field runs in a loop between the actual heating field and the outer edge 6 of the disc 5, which is usually formed as a metallic frame. The loops 7 of the conductor 41 run essentially in a horizontal direction parallel to the actual heating wires 4. The upper end of the loops 7 is guided over a vertical conductor section on the right busbar. The second conductor structure 3 protrudes like a comb into the loops 7 formed by the conductor 41. Thus, the ladder structure is 3 galvanically separated from the first conductor structure 1 and thus from the heating field. There are therefore no blocking circuits for high-frequency decoupling of the conductor structure 3 from the electrical system required. The first conductor pattern 1 and the second conductor pattern 3 can preferably be applied on the same disk side in the same screen printing.

Die Leiterstruktur 3 kann sowohl für einen Frequenzbereich zum Empfang von AM-Signalen, z. B. im LMK-Bereich, als auch zum Empfang von FM-Signalen, z. B. im UKW-Bereich, ausgelegt sein, z. B. durch unterschiedliche Längen der Finger 31 , die in die Schleifen 7 ragen. Alternativ hierzu kann die Leiterstruktur 3 nur zum Empfang von AM-Signalen vorgesehen sein und die Leiterstruktur 1 nur zum Empfang von FM-Signalen. In diesem Falle ist zumindest ein kosten- und gewichtsintensiver AM-Sperrkreis zur Bordnetzentkopplung entbehrlich. Wenn die Leiterstruktur 3 zum Empfang von FM-Signalen ausgebildet ist, kann über eine geeignete kapazitive Kopplung zwischen mindestens einem der Finger 31 und den Schleifen 7 des Leiters 41 das Heizfeld für den Empfang von FM-Signalen mitbenutzt werden. Auch dann sind keine Bordnetzentkopplungen notwendig. Falls das Heizfeld zum Empfang von FM-Signalen vorgesehen ist, kann ohne erheblichen Zusatzaufwand (zusätzliche Hochfrequenzkontaktierungen des Heizfeldes) ein Diversity-Betrieb realisiert werden. Bei gestörtem FM-Empfang wird dann im Fußpunkt 12 der FM-Antennenstruktur über eine der FM-Empfangseinrichtung 8 zugeordnete Diversity-Auswerteeinrichtung 9 ein Impedanznetzwerk 10 an den Anschlusspunkt 11 der zweiten Leiterstruktur geschaltet. Über die Kapazitätverkopplung des Leiters 41 des Heizfeldes mit der zweiten Leiterstruktur 3 und damit mit dem Impedanznetzwerk 10 , ändert sich die Richtwirkung bei FM-Empfang, was wieder einen ungestörten FM-Empfang ermöglicht. Die AM-Empfangseinrichtung 13 ist bei FM-Empfang vom Anschlusspunkt 11 wirkungslos geschaltet.The conductor structure 3 can be used both for a frequency range for receiving AM signals, z. B. in the LMK area, as well as for the reception of FM signals, z. B. in the FM area, be designed, for. B. by different lengths of the fingers 31, which protrude into the loops 7. Alternatively, the conductor pattern 3 may be provided only for receiving AM signals and the conductor pattern 1 only for receiving FM signals. In this case, at least a cost and weight-intensive AM blocking circuit for electrical system decoupling is unnecessary. If the conductor structure 3 is designed to receive FM signals, the heating field for the reception of FM signals can be shared via a suitable capacitive coupling between at least one of the fingers 31 and the loops 7 of the conductor 41. Even then, no on-board decoupling is necessary. If the heating field is provided for receiving FM signals, a diversity operation can be realized without significant additional effort (additional Hochfrequenzkontaktierungen the heating field). In the case of disturbed FM reception, an impedance network 10 is then connected to the connection point 11 of the second conductor structure in the base 12 of the FM antenna structure via a diversity evaluation device 9 assigned to the FM reception device 8. About the capacitance coupling of the conductor 41 of the heating field with the second conductor structure 3 and thus with the impedance network 10, the directivity changes with FM reception, which again allows undisturbed FM reception. The AM receiving device 13 is ineffective in FM reception from the connection point 11.

Figur 2 zeigt eine weitere Ausführungsform der Erfindung. Der Leiter 41 besitzt auf dem Leiterabschnitt am Oberrand der Scheibe 2 einen Nebenkreis in Form des Leiters 42, der ebenfalls schleifenförmig ausgestaltet ist. In diese Schleifen 71 des Leiters 42 ragt ebenso kammartig eine weitere Leiterstruktur 14 , die z. B. für den AM-Empfang ausgelegt ist, wenn die zweite Leiterstruktur 3 für FM-Empfang ausgelegt ist. Im Gegensatz zur Leiterstruktur 3 verlaufen die Schleifen 71 des Leiters 42 in vertikaler Richtung. FIG. 2 shows a further embodiment of the invention. The conductor 41 has on the conductor section on the upper edge of the disc 2 a secondary circuit in the form of the conductor 42, which is also designed loop-shaped. In these loops 71 of the conductor 42 protrudes comb-like another conductor structure 14, the z. B. is designed for AM reception when the second conductor pattern 3 is designed for FM reception. In contrast to the conductor structure 3, the loops 71 of the conductor 42 extend in the vertical direction.

Die weitere Leiterstruktur 14 kann auch für einen anderen FM-Frequenzbereich benutzt/mitbenutzt werden, z.B. für C2x (Fahrzeug zu Fahrzeug-Kommunikation oder Fahrzeug zur Infrastruktur-Kommunikation) im Gegensatz zu UKW-Rundfunkempfang oder TV-Empfang. Durch die unterschiedliche Orientierung der Schleifen 7 und 21 und damit auch der Leiterstrukturen 3 und 14, ist eine verbesserte Trennung bei unterschiedlich polarisierten Sende- und Empfangssignalen möglich. Auch kann diese unterschiedliche Orientierung der Leiterstruktur 3 und 14 für einen Diversity-Empfang benutzt werden, d.h. die Diversity-Auswerteeinrichtung 9 schaltet jeweils auf jene Leiterschleife 3 oder 14 um, die den besten Empfang bietet. Dieses Umschalten kann auch mit dem Zu- oder Abschalten des Impedanznetzwerkes 10 kombiniert werden, so dass insgesamt vier virtuelle FM-Antennen-Strahlcharakteristiken entstehen.The further conductor structure 14 can also be used / shared for another FM frequency range, eg for C2x (vehicle to vehicle communication or vehicle for infrastructure communication) in contrast to FM radio reception or TV reception. Due to the different orientation of the loops 7 and 21 and thus also of the conductor structures 3 and 14, an improved separation at differently polarized transmit and receive signals is possible. This different orientation of the conductor structure 3 and 14 can also be used for diversity reception, ie the diversity evaluation device 9 switches over in each case to that conductor loop 3 or 14 which offers the best reception. This switching can also be combined with the connection or disconnection of the impedance network 10, resulting in a total of four virtual FM antenna beam characteristics.

Wenn die Scheibe 2 gleichmäßig beheizt werden soll, ist sicherzustellen, dass der schleifenförmig verlaufende Leiter 41 der Figur 1 trotz seiner Verlängerung für die Schleifenbildung den gleichen Widerstandswert aufweist wie die übrigen Heizdrähte 4 des Heizfeldes. Dies kann am einfachsten durch Variation seiner Breite gegenüber den übrigen Heizdrähten 4 erreicht werden, derart, dass ihn ein höherer Heizstrom durchfließt, um die gleiche Heizleistung zu erzielen. Dies muss auch für die Breite des Leiters 42 bei Figur 2 im Nebenkreis des Leiters 41 berücksichtigt werden.If the disc 2 is to be heated evenly, make sure that the loop-shaped conductor 41 of the FIG. 1 despite its extension for looping the same resistance value as the other heating wires 4 of the heating field. This can be achieved most easily by varying its width relative to the other heating wires 4, such that a higher heating current flows through it in order to achieve the same heating power. This must also be the case for the width of the conductor 42 FIG. 2 be taken into account in the secondary circuit of the conductor 41.

Durch senkrechte Leiter 15 im Heizfeld kann der Diversity-Effekt verbessert werden.By vertical conductor 15 in the heating field of the diversity effect can be improved.

Claims (12)

  1. An antenna arrangement, in particular for a motor vehicle windshield antenna, consisting of a first conductor structure (1) by means of which the heat field of a window pane (2) is formed, and of a second conductor structure (3) which is implemented as an antenna conductor structure and which is galvanically separated from the heat field,
    characterized in that
    at least one heat conductor (41) of the heat field extends in a looped fashion between the actual heat field and an outer edge of the pane (5), and that the second conductor structure (3) projects into the loops (7) formed by this at least one heat conductor of the heat field (41) in a comb-like manner.
  2. The antenna arrangement according to Claim 1,
    characterized in that
    the second conductor structure (3) is applied on the same side of the pane as the first conductor structure (1).
  3. The antenna arrangement according to Claim 1 or 2,
    characterized in that
    by variation in its width, the heat field conductor (41), which extends in a looped fashion, is designed such that despite the increase in its length due to the formation of loops, the resistance value thereof is equal to that of the other heating wires (4).
  4. The antenna arrangement according to any one of Claims 1 to 3,
    characterized in that
    the conductor structures (1, 3) are applied using the screen printing method.
  5. The antenna arrangement according to any one of Claims 1 to 4,
    characterized in that
    at least the second conductor structure (3) is designed to capacitively couple to the first conductor structure (1) at high frequencies.
  6. The antenna arrangement according to any one of Claims 1 to 5,
    characterized in that
    the first conductor structure (1) is designed for a frequency range of FM signals and the second conductor structure (3) is designed for a frequency range of AM signals.
  7. The antenna arrangement according to any one of Claims 1 to 5,
    characterized in that
    the second conductor structure (3) is designed both for a frequency range for receiving FM signals and for an additional frequency range, e.g. for receiving AM signals or additional FM signals.
  8. The antenna arrangement according to any one of Claims 1 to 6,
    characterized in that
    the first conductor structure (1) is designed for FM diversity reception.
  9. The antenna arrangement according to any one of Claims 5, 6 or 8,
    characterized in that
    the second conductor structure (3) is designed for connecting an impedance network (10) at high frequencies for influencing the directional characteristic for the FM reception via the second conductor structure (3), which is coupled to the first conductor structure (1) at high frequencies.
  10. A method for operating an antenna arrangement, in particular for a motor vehicle windshield antenna according to any one of Claims 1 to 9,
    characterized in that
    FM signals are picked up at the first conductor structure (1) and AM signals are picked up at the second conductor structure (3).
  11. The method for operating a conductor structure, in particular for a motor vehicle windshield antenna according to any one of Claims 1 to 9,
    characterized in that
    both FM and AM signals are picked up at the second conductor structure (3).
  12. The method according to Claim 9,
    characterized in that
    the first conductor structure (1) is used for a diversity mode of operation, wherein the second conductor structure (3) is used for connecting an impedance network (10) at high frequencies if the FM reception is impaired.
EP08804940.8A 2007-11-30 2008-10-01 Antenna arrangement and method Active EP2215685B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007057714A DE102007057714A1 (en) 2007-11-30 2007-11-30 Antenna arrangement and method
PCT/EP2008/063115 WO2009068350A1 (en) 2007-11-30 2008-10-01 Antenna arrangement and method

Publications (2)

Publication Number Publication Date
EP2215685A1 EP2215685A1 (en) 2010-08-11
EP2215685B1 true EP2215685B1 (en) 2013-08-28

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Application Number Title Priority Date Filing Date
EP08804940.8A Active EP2215685B1 (en) 2007-11-30 2008-10-01 Antenna arrangement and method

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US (1) US8587487B2 (en)
EP (1) EP2215685B1 (en)
CN (1) CN101878560B (en)
DE (1) DE102007057714A1 (en)
TW (1) TW200924282A (en)
WO (1) WO2009068350A1 (en)

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Publication number Priority date Publication date Assignee Title
JP5428847B2 (en) * 2009-12-25 2014-02-26 セントラル硝子株式会社 Glass antenna for automobile
EP2913889B1 (en) * 2012-10-25 2021-09-08 AGC Inc. Automotive window glass and attachment structure for same
JP6601312B2 (en) * 2015-10-30 2019-11-06 Ａｇｃ株式会社 GLASS ANTENNA FOR VEHICLE AND BACK WINDOW GLASS HAVING THE GLASS ANTENNA FOR VEHICLE
GB201608383D0 (en) * 2016-05-12 2016-06-29 Pilkington Group Ltd Connector for antennas, a glazing comprising the connector and an antenna system comprising the connector
WO2019177098A1 (en) * 2018-03-16 2019-09-19 日本板硝子株式会社 Rear glass
JP2023023135A (en) * 2021-08-04 2023-02-16 Ａｇｃ株式会社 Window glass for vehicle

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Publication number Priority date Publication date Assignee Title
US4954797A (en) 1987-09-29 1990-09-04 Central Glass Company, Limited Vehicle window glass antenna coupled with defogging heater
JPH02165591A (en) 1988-12-20 1990-06-26 Nippon Sheet Glass Co Ltd Conductor printing pattern plotter for automobile window heater line
DE4034548C2 (en) 1989-05-01 2003-05-15 Heinz Lindenmeier Automotive windshield antenna for frequencies above the high frequency range
JP2515158B2 (en) * 1989-08-03 1996-07-10 日本板硝子株式会社 Car window glass antenna
DE10033336A1 (en) * 1999-08-11 2001-04-12 Heinz Lindenmeier Diversity antenna for diversity system in vehicle has edge conductor on side of conducting surface with minimum length of about tenth of wavelength, forming low impedance coupling line
US6239758B1 (en) * 2000-01-24 2001-05-29 Receptec L.L.C. Vehicle window antenna system
US6307516B1 (en) 2000-05-01 2001-10-23 Delphi Technologies, Inc. Antenna for automobile radio
JP2002020142A (en) 2000-06-29 2002-01-23 Nippon Sheet Glass Co Ltd Windshield for vehicle and method for manufacturing the same
JP2006033498A (en) * 2004-07-16 2006-02-02 Nippon Sheet Glass Co Ltd Glass antenna device for vehicle
US7038630B1 (en) * 2004-11-10 2006-05-02 Delphi Technologies AM/FM dual grid antenna
JP4370303B2 (en) * 2005-03-29 2009-11-25 セントラル硝子株式会社 Glass antenna for vehicles
DE102005039914A1 (en) * 2005-08-24 2007-03-08 Robert Bosch Gmbh Multi-range antenna array
TWM478824U (en) * 2014-01-15 2014-05-21 Noyn Electronics Corp Signal adapting line of probe detector

Also Published As

Publication number Publication date
EP2215685A1 (en) 2010-08-11
CN101878560A (en) 2010-11-03
CN101878560B (en) 2014-04-09
WO2009068350A1 (en) 2009-06-04
TW200924282A (en) 2009-06-01
US20100328170A1 (en) 2010-12-30
DE102007057714A1 (en) 2009-06-04
US8587487B2 (en) 2013-11-19

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