EP0297328B1 - Arrangement of several antennas in a glass window to get antenna diversity - Google Patents

Arrangement of several antennas in a glass window to get antenna diversity Download PDF

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Publication number
EP0297328B1
EP0297328B1 EP88109330A EP88109330A EP0297328B1 EP 0297328 B1 EP0297328 B1 EP 0297328B1 EP 88109330 A EP88109330 A EP 88109330A EP 88109330 A EP88109330 A EP 88109330A EP 0297328 B1 EP0297328 B1 EP 0297328B1
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EP
European Patent Office
Prior art keywords
antennae
diversity
antenna
conductor
window pane
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
EP88109330A
Other languages
German (de)
French (fr)
Other versions
EP0297328A3 (en
EP0297328A2 (en
Inventor
Heinz Prof. Dr.-Ing. Lindenmeier
Jochen Dr.-Ing. Hopf
Leopold Dr.-Ing. Reiter
Gerhard Prof. Dr.-Ing. Flachenecker
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.)
Fuba Hans Kolbe and Co
Original Assignee
Hans Kolbe and Co
Fuba Hans Kolbe and Co
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 Hans Kolbe and Co, Fuba Hans Kolbe and Co filed Critical Hans Kolbe and Co
Publication of EP0297328A2 publication Critical patent/EP0297328A2/en
Publication of EP0297328A3 publication Critical patent/EP0297328A3/en
Application granted granted Critical
Publication of EP0297328B1 publication Critical patent/EP0297328B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 a multi-antenna arrangement for an antenna diversity system in a motor vehicle window pane with a heating field arranged therein, according to the preamble of claim 1.
  • Such multi-antenna arrangements are used for the reception of frequency-modulated signals, such as FM radio.
  • Such an antenna is known from EP-A-0 065 263.
  • This known multi-antenna arrangement for an antenna diversity system consists of two antennas on the rear window of a motor vehicle, one of which, referred to as the auxiliary antenna, through the heating field, the other, as the main antenna designated, is realized by an antenna conductor arranged in the free space above the heating field of the rear window.
  • the Terminal pair of the heating field antenna has a connection point on the lowermost heating conductor and a second ground connection point on the adjacent section of the window frame.
  • the invention is therefore based on the object, a multi-antenna arrangement for an antenna diversity system in a motor vehicle window pane according to the preamble of claim 1, preferably for reception in the range of the meter waves (VHF) with more than two antennas, so that the middle Reception quality with each individual antenna is as good as possible and the number of interferences that occur simultaneously in the signals of the different antennas is as low as possible.
  • VHF meter wave
  • RF decoupling within the meaning of claim 1 exists when the received signals of the antennas, in particular with regard to reception interference, such as e.g. Dips in the RF level are different.
  • FIG. 1 shows a window pane surrounded by a metallic frame, which is referred to below as the mass.
  • the heating surface is used for the formation of at least two FM antennas.
  • suitable pairs of terminals which are each formed from the conductor part connection point (5a, b) and an adjacent earth point on the frame, can be Manufacture FM antennas whose signals are largely independent of each other.
  • additional VHF antennas can be attached in the partial areas of the window which are not covered with conductors, the reception signals of which also differ from the other VHF antennas, in particular with regard to the interference to be avoided.
  • FIG. 1 shows a window pane surrounded by a metallic frame, which is referred to below as the mass.
  • the heating surface is used for the formation of at least two FM antennas.
  • the left half of the window above the heating surfaces is covered with a VHF monopoly (5c), which is designed as a parallel conductor that is combined at the connection point.
  • the dimensions of this monopoly are selected using the available space in such a way that the average reception power assumes the best possible value. With the usual vehicle dimensions, the width of which in the FM range is approximately half a wavelength, monopoles with a favorable length of a quarter wavelength can thus be realized.
  • the distances from the frame and from the heating fields are set favorably according to known aspects. In the example in FIG. 1, the space above the heating field in the right part of the window is used for the design of an LMK antenna according to known aspects.
  • the heating field generally represents a mass for the LMK frequency range, just like the window frame, in terms of radio frequency.
  • the dimensions according to the dimensioning of the LMK antenna are as set out in DOS-P 34 10 415.1 Viewpoints set.

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  • Details Of Aerials (AREA)

Description

Die Erfindung bezieht sich auf eine Mehrantennen-Anordnung für eine Antennendiversity-Anlage in einer Kraftfahrzeug-Fensterscheibe mit einem in dieser angeordneten Heizfeld gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a multi-antenna arrangement for an antenna diversity system in a motor vehicle window pane with a heating field arranged therein, according to the preamble of claim 1.

Solche Mehrantennenanordnungen werden verwendet für den Empfang frequenzmodulierter Signale, wie z.B. des UKW-Rundfunks. Eine derartige Antenne ist bekannt aus EP-A-0 065 263. Diese bekannte Mehrantennenanordnung für eine Antennendiversity-Anlage besteht aus zwei Antennen auf der Heckscheibe eines Kraftfahrzeuges, von denen die eine, als Hilfsantenne bezeichnete, durch das Heizfeld, die andere, als Hauptantenne bezeichnete, durch einen in dem über dem Heizfeld befindlichen Freiraum der Heckscheibe angeordneten Antennenleiter realisiert ist. Das Anschlußklemmenpaar der Heizfeldantenne weist einen Anschlußpunkt auf dem untersten Heizleiter und einen zweiten Masseanschlußpunkt an dem benachbarten Abschnitt des Fensterrahmens auf.Such multi-antenna arrangements are used for the reception of frequency-modulated signals, such as FM radio. Such an antenna is known from EP-A-0 065 263. This known multi-antenna arrangement for an antenna diversity system consists of two antennas on the rear window of a motor vehicle, one of which, referred to as the auxiliary antenna, through the heating field, the other, as the main antenna designated, is realized by an antenna conductor arranged in the free space above the heating field of the rear window. The Terminal pair of the heating field antenna has a connection point on the lowermost heating conductor and a second ground connection point on the adjacent section of the window frame.

Eine derartige Anordnung weist den Nachteil auf, daß das Diversitysystem auf zwei UKW-Antennen beschränkt ist. Sind die Signale von beiden Antennen gleichzeitig gestört, so ist der Empfang unbefriedigend und die empfundene Störung wird dadurch erheblich vergrößert, daß das Diversitysystem während dieser Zeit fortwährend zwischen den beiden Antennen umschaltet und das in der Praxis unvermeidbare Schaltgeräusch sich der Empfangsstörung zusätzlich überlagert. Dieser Fall ist in der Praxis häufig gegeben. Es ist deshalb notwendig, die Anzahl der für Antennendiversity zur Verfügung stehenden Antennen zu erhöhen. Andererseits ist die Verwendung zusätzlicher Antennen am Fahrzeug außerhalb des Fensters kostenintensiv.Such an arrangement has the disadvantage that the diversity system is limited to two FM antennas. If the signals from both antennas are disturbed at the same time, the reception is unsatisfactory and the perceived disturbance is considerably increased by the fact that the diversity system continuously switches between the two antennas during this time and the switching noise that is inevitable in practice is also superimposed on the reception disturbance. This is often the case in practice. It is therefore necessary to increase the number of antennas available for antenna diversity. On the other hand, the use of additional antennas on the vehicle outside the window is expensive.

Zu beachten ist auch, daß die Realisierung von Fahrzeugantennen in der Heckscheibe auf das dort vorhandene Heizfeld Rücksicht nehmen muß, dessen Ausführung und Abmessungen unter fahrzeugspezifischen und stilistischen Gesichtspunkten vorgegeben sind.It should also be noted that the implementation of vehicle antennas in the rear window must take into account the heating field there, the design and dimensions of which are specified from a vehicle-specific and stylistic point of view.

Der Erfindung liegt deshalb die Aufgabe zugrunde, eine Mehrantennenanordnung für eine Antennendiversity-Anlage in einer Kraftfahrzeug-Fensterscheibe gemäß dem Oberbegriff des Anspruchs 1, vorzugsweise für den Empfang im Bereich der Meterwellen (UKW) mit mehr als zwei Antennen, so auszubilden, daß die mittlere Empfangsqualität mit jeder Einzelantenne möglichst gut ist und die Anzahl der Störungen, die in den Signalen der verschiedenen Antennen gleichzeitig auftreten, möglichst gering ist.The invention is therefore based on the object, a multi-antenna arrangement for an antenna diversity system in a motor vehicle window pane according to the preamble of claim 1, preferably for reception in the range of the meter waves (VHF) with more than two antennas, so that the middle Reception quality with each individual antenna is as good as possible and the number of interferences that occur simultaneously in the signals of the different antennas is as low as possible.

Diese Aufgabe wird erfindungsgemäß bei einer Mehrantennen-Anordnung für eine Antennendiversity-Anlage der eingangs genannten Art durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.This object is achieved according to the invention in a multi-antenna arrangement for an antenna diversity system of the type mentioned at the outset by the characterizing features of claim 1.

Eine HF-mäßige Entkopplung im Sinne des Anspruchs 1 liegt vor, wenn die Empfangssignale der Antennen, insbesondere im Hinblick auf Empfangsstörungen, wie z.B. Einbrüche des HF-Pegels, unterschiedlich sind.RF decoupling within the meaning of claim 1 exists when the received signals of the antennas, in particular with regard to reception interference, such as e.g. Dips in the RF level are different.

Ausführungsbeispiele der Erfindung, die in der Zeichnung dargestellt sind, werden im folgenden näher beschrieben. Im einzelnen zeigt:

  • Fig. 1 eine Mehrantennen-Anordnung nach der Erfindung mit einer in der nicht mit Heizleitern besteckten Fläche der Fensterscheibe angeordneten Diversity-Antenne links oben im Fensterfeld, zwei aus dem Heizfeld gebildeten Diversity-Antennen und einer Antenne für LMK-Empfang (rechts oben),
  • Fig. 2 eine Mehrantennen-Anordnung nach der Erfindung wie Fig. 1, jedoch mit einer zusätzlichen aus dem Heizfeld gebildeten Diversity-Antenne,
  • Fig. 3 eine Mehrantennen-Anordnung wie in Fig. 1, jedoch mit einem Faltmonopol für die Ausbildung der in der nicht mit Heizleitern bedeckten Fläche der Fensterscheibe angeordneten Diversity-Antenne (links oben),
  • Fig. 4 eine Mehrantennenanordnung nach der Erfindung mit zwei in der nicht mit Heizleitern bedeckten Fläche der Fensterscheibe angeordneten Diversity-Antennen unterhalb des Heizfeldes, von denen die eine als Faltmonopol (5c) und die andere als Drahtmonopol (5d) ausgeführt ist, wobei rechts unten im Fensterfeld beispielhaft eine Antenne für den LMK-Empfang angebracht ist,
  • Fig. 5 eine Mehrantennenanordnung nach der Erfindung mit einer weiteren in der nicht mit Heizleitern bedeckten Fläche der Fensterscheibe angeordneten Diversity-Antenne oberhalb des Heizfeldes, deren Antennenleiter (5c) auch als Teil einer LMK-Antenne verwendet ist.
Embodiments of the invention, which are shown in the drawing, are described in more detail below. In detail shows:
  • 1 shows a multi-antenna arrangement according to the invention with a diversity antenna arranged in the area of the window pane which is not equipped with heating conductors, at the top left in the window field, two diversity antennas formed from the heating field and an antenna for LMK reception (top right),
  • 2 shows a multi-antenna arrangement according to the invention as in FIG. 1, but with an additional diversity antenna formed from the heating field,
  • 3 shows a multi-antenna arrangement as in FIG. 1, but with a folding monopoly for the formation of the diversity antenna arranged in the area of the window pane not covered with heating conductors (top left),
  • 4 shows a multi-antenna arrangement according to the invention with two diversity antennas arranged in the area of the window pane not covered with heating conductors, below the heating field, one of which acts as a folding monopole (5c). and the other is designed as a wire monopole (5d), an antenna for LMK reception being provided as an example at the bottom right in the window field,
  • 5 shows a multi-antenna arrangement according to the invention with a further diversity antenna arranged in the area of the window pane which is not covered with heating conductors, above the heating field, the antenna conductor (5c) of which is also used as part of an LMK antenna.

In Fig. 1 ist eine von einem metallischen Rahmen, der im folgenden als Masse bezeichnet wird, umgebene Fensterscheibe dargestellt. Die Heizfläche wird für die Bildung von mindestens zwei UKW-Antennen herangezogen. Durch Wahl geeigneter Anschlußklemmenpaare, die jeweils aus dem Leiterteil-Anschlußpunkt (5a,b) und einem benachbarten Massepunkt auf dem Rahmen gebildet sind, lassen sich UKW-Antennen herstellen, deren Signale weitgehend unabhängig voneinander sind. In den nicht mit Leitern bedeckten Teilflächen des Fensters können erfindungsgemäß weitere UKW-Antennen angebracht werden, deren Empfangssignale ebenfalls insbesondere hinsichtlich der zu vermeidenden Störungen von den übrigen UKW-Antennen unterschiedlich sind. Im Beispiel der Fig. 1 ist die linke Hälfte des Fensters oberhalb der Heizflächen mit einem UKW-Monopol (5c) belegt, der als parallel geführte Leiter, die am Anschlußpunkt zusammengefaßt sind, ausgeführt ist. Die Abmessungen dieses Monopols sind unter Nutzung des zur Verfügung stehenden Raumes so gewählt, daß die mittlere Empfangsleistung einen möglichst guten Wert annimmt. Bei den üblichen Fahrzeugabmessungen, deren Breite im UKW-Bereich ungefähr eine halbe Wellenlänge beträgt, lassen sich somit Monopole mit einer günstigen Länge von einer viertel Wellenlänge realisieren. Die Abstände vom Rahmen und von den Heizfeldern werden nach bekannten Gesichtspunkten günstig eingestellt. Im Beispiel der Fig. 1 wird der Raum oberhalb des Heizfeldes im rechten Fensterteil für die Gestaltung einer LMK-Antenne nach bekannten Gesichtspunkten verwendet. Das Heizfeld stellt im allgemeinen für den LMK-Frequenzbereich, ebenso wie der Fensterrahmen, hochfrequenzmäßig eine Masse dar. Um für LMK einen guten Empfang zu gewährleisten, werden hinsichtlich der Dimensionierung der LMK-Antenne die Abmessungen nach den in DOS-P 34 10 415.1 dargelegten Gesichtspunkten eingestellt.1 shows a window pane surrounded by a metallic frame, which is referred to below as the mass. The heating surface is used for the formation of at least two FM antennas. By choosing suitable pairs of terminals, which are each formed from the conductor part connection point (5a, b) and an adjacent earth point on the frame, can be Manufacture FM antennas whose signals are largely independent of each other. According to the invention, additional VHF antennas can be attached in the partial areas of the window which are not covered with conductors, the reception signals of which also differ from the other VHF antennas, in particular with regard to the interference to be avoided. In the example in FIG. 1, the left half of the window above the heating surfaces is covered with a VHF monopoly (5c), which is designed as a parallel conductor that is combined at the connection point. The dimensions of this monopoly are selected using the available space in such a way that the average reception power assumes the best possible value. With the usual vehicle dimensions, the width of which in the FM range is approximately half a wavelength, monopoles with a favorable length of a quarter wavelength can thus be realized. The distances from the frame and from the heating fields are set favorably according to known aspects. In the example in FIG. 1, the space above the heating field in the right part of the window is used for the design of an LMK antenna according to known aspects. The heating field generally represents a mass for the LMK frequency range, just like the window frame, in terms of radio frequency. In order to ensure good reception for LMK, the dimensions according to the dimensioning of the LMK antenna are as set out in DOS-P 34 10 415.1 Viewpoints set.

Claims (11)

  1. A multi-antennae arrangement for an antenna diversity installation in a motor vehicle window pane (1) having a heating field (2) disposed therein, which is used as a part of the antenna diversity installation, having at least one antennae conductor, disposed in the surface of the window pane (1) which is without heat conductors, of an antenna of the antenna diversity installation having a connecting terminal pair consisting of an antennae conductor connection point (5c) and an earth connection point (14c), wherein the form of the antennae conductor and the position of the connecting terminal pair (5c, 14c) are chosen in such a way that this antenna is decoupled, with respect to diversity, within the multi-antennae arrangement,
    characterised in that the heating field (2) is divided into at least two partial fields (2a, 2b) lying one above the other, wherein each partial field (2a, 2b) comprises, on both front faces, conductor parts (4a, b, c, d) connecting the heat conductors of the partial field and serving to supply the heating current which supplies this partial field,
    that each partial field (2a, 2b) is used for at least one antenna of the antenna diversity installation and to this end has at least one connecting terminal pair (5a, b, c, d, 14a, b, c, d) and two connecting terminal pairs, wherein each terminal pair consists of a conductor part connection or terminal point and an earth connection or terminal point,
    that in the heating current supplies to the individual front face conductor parts (4a, b, c, d) of the partial fields (2a, 2b) networks (6a, b, c, d) are inserted which allow the passage of the heating direct current but not for high frequency power, and at their outlet connected to the respective conductor part (4a, b, c, d) form a connecting terminal pair, to which they load the associated antenna with a low-loss impedance with respect to high frequency, and
    that in order to achieve an optimal decoupling, with respect to diversity, of the individual antennae of the antenna diversity installation
    a) in the connecting terminal pairs of the antennae formed by the heating field (3) the position of the conductor part connection points (5a, 5b, 5d) is differently selected in such a way that these antennae are substantially decoupled from each other with respect to diversity,
    b) the impedances, with respect to high frequency, with which the individual antennae of the heating field are loaded at the connecting terminal pairs by the networks (6a, b, c, d) connected into the heating current supplies, are differently selected in such a way that these antennae are substantially decoupled from each other with respect to diversity.
  2. A multi-antennae arrangement according to claim 1, characterised in that at the connecting terminal pairs (5a, 14a; 5b, 14b) a respective continuing network (8a, 8b) with transformation and/or amplification properties is connected, of which the outlet forms the antennae connection point (7a, 7b) of one of the diversity antennae respectively.
  3. A multi-antennae arrangement according to one of claims 1 or 2, characterised in that each of the diversity antennae disposed in the surface of the window pane which is without heat conductors contains a continuing network connected to the connecting terminal pair and having transformation and/or amplification properties, of which the outlet forms the antennae connection point (7c, 7d) of one of the diversity antennae respectively.
  4. A multi-antennae arrangement according to one of claims 1 to 3, characterised in that at least one of the diversity antennae disposed in the surface of the window pane which is without heat conductors has an antennae conductor formed two dimensionally and in the form of an electric monopole.
  5. A multi-antennae arrangement according to claim 4, characterised in that the two dimensionally formed antennae conductor consists of a series of parallel directed wires, which are connected conductively to each other at least on one front face and the antennae conductor connection point (5c) is connected to such a front face.
  6. A multi-antennae arrangement according to one of claims 1 to 3, characterised in that at least one of the diversity antennae disposed in the surface of the window pane which is without heat conductors has an antenna conductor which is formed as a folded monopole.
  7. A multi-antennae arrangement according to one of claims 1 to 3, characterised in that at least one of the diversity antennae disposed in the surface of the window pane which is without heat conductors has an antennae conductor which is formed as a straight linear conductor.
  8. A multi-antennae arrangement according to one of claims 1 to 7, characterised in that the antennae conductors of two of the diversity antennae above or below the heating field, disposed in the surface of the window pane which is without heat conductors, are disposed one in the left and the other in the right partial surfaces of the window pane.
  9. A multi-antennae arrangement according to one of claims 1 to 8 , characterised in that the heating field (2)is divided into two partial fields (2a, 2b) lying one above the other, each partial field is used for one antenna of the antenna diversity installation, that the conductor part connection points (5a, 5b) of each antenna are attached at the end of the respective conductor parts (4a, 4c) and diagonally opposed to each other.
  10. A multi-antennae arrangement according to one of claims 2 to 9, characterised in that one of the diversity antennae disposed in the surface of the window pane which is without heat conductors is also used for the reception of long, medium and short wave signals and the continuing network contains a signal path with amplifiers for long, medium and short wave signals and a separate signal path for VHF signals and the two signals paths are connected to each other at the inlet side by a diplexer and the antennae connection point of this diversity antenna (7c) is formed by the outlet of a diplexer at the outlet of the continuing network.
  11. A multi-antennae arrangement according to one of claims 1 to 10, characterised in that in a surface of the window pane which is without heat conductors, an antenna for the reception of long, medium and short wave signals is attached.
EP88109330A 1987-06-12 1988-06-11 Arrangement of several antennas in a glass window to get antenna diversity Expired - Lifetime EP0297328B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873719692 DE3719692A1 (en) 1987-06-12 1987-06-12 MULTI-ANTENNA ARRANGEMENT FOR ANTENNA DIVERSITY IN A WINDOW WINDOW
DE3719692 1987-06-12

Publications (3)

Publication Number Publication Date
EP0297328A2 EP0297328A2 (en) 1989-01-04
EP0297328A3 EP0297328A3 (en) 1991-01-16
EP0297328B1 true EP0297328B1 (en) 1995-05-03

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EP88109330A Expired - Lifetime EP0297328B1 (en) 1987-06-12 1988-06-11 Arrangement of several antennas in a glass window to get antenna diversity

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DE (2) DE3719692A1 (en)

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DE10100812B4 (en) 2001-01-10 2011-09-29 Heinz Lindenmeier Diversity antenna on a dielectric surface in a vehicle body
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Also Published As

Publication number Publication date
DE3719692C2 (en) 1991-09-19
DE3853699D1 (en) 1995-06-08
DE3719692A1 (en) 1988-12-22
EP0297328A3 (en) 1991-01-16
EP0297328A2 (en) 1989-01-04

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