EP1753081A1 - Planar mobile radio antenna for a vehicle - Google Patents

Planar mobile radio antenna for a vehicle Download PDF

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Publication number
EP1753081A1
EP1753081A1 EP06013683A EP06013683A EP1753081A1 EP 1753081 A1 EP1753081 A1 EP 1753081A1 EP 06013683 A EP06013683 A EP 06013683A EP 06013683 A EP06013683 A EP 06013683A EP 1753081 A1 EP1753081 A1 EP 1753081A1
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EP
European Patent Office
Prior art keywords
antenna
mobile radio
oval
radio antenna
mobile
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06013683A
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German (de)
French (fr)
Inventor
Jörg Alber
Ying Zhang
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.)
Hirschmann Car Communication GmbH
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Hirschmann Car Communication GmbH
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Filing date
Publication date
Application filed by Hirschmann Car Communication GmbH filed Critical Hirschmann Car Communication GmbH
Publication of EP1753081A1 publication Critical patent/EP1753081A1/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • 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
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths

Definitions

  • the invention relates to a flat-construction mobile radio antenna according to the features of the preamble of patent claim 1.
  • a roof antenna manufactured by the applicant has a base plate which is produced by casting. This base plate receives one or more radiators for transmitting and / or receiving high-frequency signals and is inserted via a downwardly directed threaded pin in an opening of the vehicle roof and screwed there.
  • a protective cover made of plastic is provided which extends over the radiator. It is for optical and aerodynamic reasons of disadvantage that this plastic hood is directed several centimeters in height. This is partly also necessary so that the radiators, which must have a certain spatial extent for transmitting and / or receiving the high-frequency signals, even fit under the cover.
  • the invention is therefore based on the object to provide a mobile radio antenna for a vehicle for receiving and / or transmitting high-frequency signals, which at least retains the previously achieved transmission and / or reception properties or is improved to that effect, at the same time particularly flat design, especially at a height of ⁇ 20 mm.
  • the at least one antenna element for receiving and / or transmitting high-frequency signals is oval or semi-oval-shaped.
  • the oval antenna element preferably extends over almost the entire base area of the mobile radio antenna, while the semi-oval-shaped antenna element extends approximately over one half of the base area of the mobile radio antenna.
  • This form has, as has surprisingly been found, the advantage that signals of a few hundred megahertz or a few gigahertz can be easily sent and / or received, while the plane-parallel to a base of the mobile antenna arranged oval or semi-oval shaped antenna element a particularly flat-built mobile radio antenna results.
  • the at least one antenna element is arranged at a certain distance plane-parallel to the mass element of the mobile radio antenna.
  • another, likewise oval or semi-oval-shaped antenna element is arranged in the same plane in the first antenna element, wherein a slot is present between the two antenna elements. Due to the different planar extent and shape of the two antenna elements, it is possible to transmit and / or receive high-frequency signals in different frequency ranges while maintaining the flat design of the mobile radio antenna.
  • the first antenna element which is arranged around the further antenna element for example, for the reception of high-frequency signals in the range of 900 megahertz is formed.
  • mobile services such as AMPS or GSM 900 can be received.
  • the further antenna element arranged within the first antenna element is designed such that it is suitable, for example, for high-frequency signals in the frequency range around 1800 to 2200 megahertz. This can be used to receive mobile services, such as GSM 1800, PCS 1900 and UMTS.
  • mobile services such as GSM 1800, PCS 1900 and UMTS.
  • GSM 1800, PCS 1900 and UMTS mobile services
  • the two oval or semi-oval antenna elements which are nested and arranged in the same plane planparallel (coplanar) to the ground plane (mass element) of the mobile antenna, the advantage that the high-frequency signals of different services can be sent and / or received at the same time flat construction (preferably a height ⁇ 20 mm) is given.
  • the figure shows as part of a mobile radio antenna according to the invention for use in or on vehicles a mass element 1, which forms a base plate.
  • the mass element 1 is formed as a printed circuit board with arranged thereon electrically conductive regions. These electrically conductive regions form a shielding as areal areas or, in the form of strip conductors, a supply or discharge of the high-frequency signals to be transmitted or received.
  • a cable is connected to the ground element 1 designed as a printed circuit board, with which the mobile radio antenna is connected to a downstream electronic device (for example, amplifier, receiver, transmitter or the like).
  • the entire mobile radio antenna is located in a housing, preferably a plastic housing, and has a seal at the point at which the cable is passed through the housing.
  • a feed point 3 and a ground terminal 4 is provided.
  • a printed circuit board, not shown, of the printed circuit board formed as mass element 1 while the ground terminal 4 is connected to a planar-shaped electrically conductive region of the mass element 1.
  • the two antenna elements 2 a, 2 b are separate components or manufactured in one piece, it being particularly advantageous in the case of one-piece design, the two antenna elements 2 a, 2 b, form as a sheet metal part and preferably by means of a stamping process.
  • a sheet metal part has the advantage that it has excellent electrical properties for transmitting and / or receiving high-frequency signals, while the desired shape can be achieved quickly, easily and inexpensively by means of the punch bending process.
  • such a sheet metal part has the advantage that it can easily be electrically connected, in particular soldered, in the region of the feed point 3 or the ground connection 4 to the associated electrically conductive regions of the mass element 1.
  • printed circuit boards with flat, electrically conductive areas are also suitable here.
  • the cable is attached and this unit is inserted into a housing and the housing is closed. Thereafter, the finished mobile antenna is available for use in a vehicle or for attachment to a vehicle.
  • the planar extent of the mass element 1 largely corresponds to the antenna elements 2 a, 2 b, wherein it is conceivable to use more than two antenna elements.
  • the use of a GPS receiver module is also considered, which can be arranged as a finished unit on the mass element 1. In this case, it makes sense, the free surface of the mass element 1 according to the figure for attachment of the GPS receiver module.
  • the semi-oval shape of the antenna element 2a, 2b is particularly advantageous, since they can be arranged at a sufficient distance from the GPS receiver module to reduce or avoid mutual interference in the form of interference radiation.
  • the base plate also from a die-cast.
  • a part of the housing is made of a base plate of a die-cast (for example brass) or in a stamping bending process. Then, this base plate is plane-parallel (coplanar) to the mass element, in particular the circuit board arranged.
  • the attachment is then for example via a screw (in particular by means of a threaded pin on the base plate) or an adhesive bond (in particular a two-sided adhesive film between the underside of the housing of the antenna and the surface of the vehicle component.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)
  • Details Of Aerials (AREA)

Abstract

A flat weight (1) is arranged parallel to an antenna element (2a,2b). The antenna element is oval or half-oval in shape. The internal contour of a housing is adapted to the weight and antenna element. A dielectric is arranged in a slot to improve antenna characteristics.

Description

Die Erfindung betrifft eine flachbauende Mobilfunkantenne gemäß den Merkmalen des Oberbegriffes des Patentanspruchs 1.The invention relates to a flat-construction mobile radio antenna according to the features of the preamble of patent claim 1.

Mobilfunkantennen zum Empfangen und/oder Senden hochfrequenter Signale bestimmter Dienste für Fahrzeuge sind bekannt. Eine von der Anmelderin hergestellte Dachantenne weist eine Grundplatte auf, die im Gußverfahren hergestellt wird. Diese Grundplatte nimmt einen oder mehrere Strahler zum Senden und/oder Empfangen hochfrequenter Signale auf und wird über einen nach unten gerichteten Gewindezapfen in eine Öffnung des Fahrzeugdaches gesteckt und dort festgeschraubt. Zum Schutz der Strahler und auch aus aerodynamischen Gründen ist eine Schutzhaube aus Kunststoff vorgesehen, die sich über die Strahler erstreckt. Dabei ist es aus optischen und aerodynamischen Gründen von Nachteil, dass diese Kunststoffhaube mehrere Zentimeter in die Höhe gerichtet ist. Dies ist teilweise auch deshalb erforderlich, damit die Strahler, die zum Senden und/oder Empfangen der hochfrequenten Signale eine bestimmte räumliche Ausdehnung aufweisen müssen, überhaupt unter die Abdeckhaube passen.Mobile radio antennas for receiving and / or transmitting high-frequency signals of certain services for vehicles are known. A roof antenna manufactured by the applicant has a base plate which is produced by casting. This base plate receives one or more radiators for transmitting and / or receiving high-frequency signals and is inserted via a downwardly directed threaded pin in an opening of the vehicle roof and screwed there. To protect the spotlights and also for aerodynamic reasons, a protective cover made of plastic is provided which extends over the radiator. It is for optical and aerodynamic reasons of disadvantage that this plastic hood is directed several centimeters in height. This is partly also necessary so that the radiators, which must have a certain spatial extent for transmitting and / or receiving the high-frequency signals, even fit under the cover.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Mobilfunkantenne für ein Fahrzeug zum Empfangen und/oder Senden hochfrequenter Signale bereitzustellen, die die bisher erzielten Sende- und/oder Empfangseigenschaften zumindest beibehält oder dahingehend verbessert ist, bei gleichzeitig besonders flacher Bauweise, insbesondere bei einer Höhe von ≤ 20 mm.The invention is therefore based on the object to provide a mobile radio antenna for a vehicle for receiving and / or transmitting high-frequency signals, which at least retains the previously achieved transmission and / or reception properties or is improved to that effect, at the same time particularly flat design, especially at a height of ≤ 20 mm.

Diese Aufgabe ist durch die Merkmale des Patentanspruchs 1 gelöst.This object is solved by the features of patent claim 1.

In erfindungsgemäßer Weise ist das zumindest eine Antennenelement zum Empfangen und/oder Senden hochfrequenter Signale oval oder halb ovalförmig ausgebildet. Das ovale Antennenelement erstreckt sich vorzugsweise über die nahezu gesamte Grundfläche der Mobilfunkantenne, während das halbovalförmige Antennenelement sich etwa über eine Hälfte der Grundfläche der Mobilfunkantenne erstreckt. Diese Form hat, wie sich überraschend herausgestellt hat, den Vorteil, dass damit Signale von einigen hundert Megahertz oder wenigen Gigahertz problemlos gesendet und/oder empfangen werden können, während das planparallel zu einer Grundfläche der Mobilfunkantenne angeordnete ovale oder halbovalförmige Antennenelement eine besonders flach bauende Mobilfunkantenne ergibt. Zu diesem Zweck ist das zumindest eine Antennenelement in einem bestimmten Abstand planparallel zu dem Masseelement der Mobilfunkantenne angeordnet.In accordance with the invention, the at least one antenna element for receiving and / or transmitting high-frequency signals is oval or semi-oval-shaped. The oval antenna element preferably extends over almost the entire base area of the mobile radio antenna, while the semi-oval-shaped antenna element extends approximately over one half of the base area of the mobile radio antenna. This form has, as has surprisingly been found, the advantage that signals of a few hundred megahertz or a few gigahertz can be easily sent and / or received, while the plane-parallel to a base of the mobile antenna arranged oval or semi-oval shaped antenna element a particularly flat-built mobile radio antenna results. For this purpose, the at least one antenna element is arranged at a certain distance plane-parallel to the mass element of the mobile radio antenna.

In einer weiteren Ausgestaltung der Erfindung ist in dem ersten Antennenelement ein weiteres, ebenfalls ovales oder halbovalförmiges Antennenelement in der gleichen Ebene angeordnet, wobei zwischen den beiden Antennenelementen ein Schlitz vorhanden ist. Aufgrund der unterschiedlichen flächigen Erstreckung und Formgebung der beiden Antennenelemente ist es unter Beibehaltung der flachen Bauweise der Mobilfunkantenne möglich, hochfrequente Signale in unterschiedlichen Frequenzbereichen zu senden und/oder zu empfangen. So ist das erste Antennenelement, das um das weitere Antennenelement herum angeordnet ist, zum Beispiel für den Empfang von hochfrequenten Signalen im Bereich um 900 Megahertz ausgebildet. Damit können beispielsweise Mobilfunkdienste wie AMPS oder GSM 900 empfangen werden. Das innerhalb des ersten Antennenelementes angeordnete weitere Antennenelement ist so gestaltet, dass es beispielsweise für hochfrequente Signale im Frequenzbereich um 1800 bis 2200 Megahertz geeignet ist. Damit lassen sich Mobilfunkdienste, wie GSM 1800, PCS 1900 und UMTS empfangen. Die vorstehende Aufzählung ist nur beispielhaft und nicht abschließend.In a further embodiment of the invention, another, likewise oval or semi-oval-shaped antenna element is arranged in the same plane in the first antenna element, wherein a slot is present between the two antenna elements. Due to the different planar extent and shape of the two antenna elements, it is possible to transmit and / or receive high-frequency signals in different frequency ranges while maintaining the flat design of the mobile radio antenna. Thus, the first antenna element which is arranged around the further antenna element, for example, for the reception of high-frequency signals in the range of 900 megahertz is formed. Thus, for example, mobile services such as AMPS or GSM 900 can be received. The further antenna element arranged within the first antenna element is designed such that it is suitable, for example, for high-frequency signals in the frequency range around 1800 to 2200 megahertz. This can be used to receive mobile services, such as GSM 1800, PCS 1900 and UMTS. The above list is exemplary only and not exhaustive.

Insgesamt bieten die beiden ovalen oder halbovalen Antennenelemente, die ineinander verschachtelt und in der gleichen Ebene planparallel (koplanar) zu der Massefläche (Masseelement) der Mobilfunkantenne angeordnet sind, den Vorteil, dass die hochfrequenten Signale verschiedener Dienste gesendet und/oder empfangen werden können bei gleichzeitig flacher Bauweise (vorzugsweise eine Höhe ≤ 20 mm) gegeben ist.Overall, the two oval or semi-oval antenna elements, which are nested and arranged in the same plane planparallel (coplanar) to the ground plane (mass element) of the mobile antenna, the advantage that the high-frequency signals of different services can be sent and / or received at the same time flat construction (preferably a height ≤ 20 mm) is given.

Weitere Ausgestaltungen der erfindungsgemäßen Mobilfunkantenne sind in den Unteransprüchen angegeben, im Folgenden beschrieben und anhand der Figur erläutert.Further embodiments of the mobile radio antenna according to the invention are specified in the subclaims, described below and explained with reference to the figure.

Die Figur zeigt als Bestandteil einer erfindungsgemäßen Mobilfunkantenne für die Anwendung in oder an Fahrzeugen ein Masseelement 1, das eine Grundplatte bildet. In bevorzugter Weise ist das Masseelement 1 als Leiterplatte mit darauf angeordneten elektrisch leitfähigen Bereichen ausgebildet. Diese elektrisch leitfähigen Bereiche bilden als flächige Bereiche eine Abschirmung oder in Form von Leiterbahnen eine Zufuhr bzw. Ableitung der zu sendenden bzw. empfangenden hochfrequenten Signale. So ist bei einem Ausführungsbeispiel an dem als Leiterplatte ausgebildeten Masseelement 1 ein Kabel angeschlossen, mit dem die Mobilfunkantenne an einem nachgeschalteten elektronischen Gerät (zum Beispiel Verstärker, Empfänger, Sender oder dergleichen) angeschlossen ist. Die gesamte Mobilfunkantenne befindet sich in einem Gehäuse, vorzugsweise einem Kunststoffgehäuse, und weist an der Stelle, an der das Kabel durch das Gehäuse geführt ist, eine Abdichtung auf.The figure shows as part of a mobile radio antenna according to the invention for use in or on vehicles a mass element 1, which forms a base plate. Preferably, the mass element 1 is formed as a printed circuit board with arranged thereon electrically conductive regions. These electrically conductive regions form a shielding as areal areas or, in the form of strip conductors, a supply or discharge of the high-frequency signals to be transmitted or received. Thus, in one exemplary embodiment, a cable is connected to the ground element 1 designed as a printed circuit board, with which the mobile radio antenna is connected to a downstream electronic device (for example, amplifier, receiver, transmitter or the like). The entire mobile radio antenna is located in a housing, preferably a plastic housing, and has a seal at the point at which the cable is passed through the housing.

Planparallel (koplanar) zu der flächig gestalteten Grundplatte (Masseelement 1) sind zwei Antennenelemente 2 a, 2 b, angeordnet, die bei diesem Ausführungsbeispiel ineinander verschachtelt und halbovalförmig ausgebildet sind. Zwischen diesen beiden Antennenelementen 2 a, 2 b ist ein Schlitz vorhanden, der ebenfalls oval oder in diesem Fall halbovalförmig verläuft. Im Ausführungsbeispiel gemäß der Figur ändert der Schlitz in seinem Verlauf die Breite, während es auch denkbar ist, dass der Schlitz in seinem Verlauf eine gleichbleibende Breite aufweist. Dadurch lassen sich mittels geeigneter Abstimmung die bestmöglichen Sende- und/oder Empfangseigenschaften der Antenne erzielen.Plane-parallel (coplanar) to the surface-shaped base plate (mass element 1), two antenna elements 2 a, 2 b, arranged, which are interleaved in this embodiment and formed halbovalförmig. Between these two antenna elements 2 a, 2 b, a slot is present, which also runs oval or in this case semi-oval. In the embodiment according to the figure, the slot changes in its course the width, while it is also conceivable that the slot in its course a constant width having. As a result, the best possible transmission and / or reception properties of the antenna can be achieved by means of suitable tuning.

In einem abgewinkelten Endbereich der beiden Antennenelemente 2 a, 2 b, ist ein Speisepunkt 3 und ein Masseanschluss 4 vorgesehen. Zu dem Speisepunkt 3 führt eine nicht dargestellte Leiterbahn der als Leiterplatte ausgebildeten Masseelementes 1, während der Masseanschluss 4 mit einem flächig gestalteten elektrisch leitfähigen Bereich des Masseelementes 1 verbunden ist.In an angled end region of the two antenna elements 2 a, 2 b, a feed point 3 and a ground terminal 4 is provided. To the feeding point 3 leads a printed circuit board, not shown, of the printed circuit board formed as mass element 1, while the ground terminal 4 is connected to a planar-shaped electrically conductive region of the mass element 1.

Die beiden Antennenelemente 2 a, 2 b, sind separate Bauteile oder einstückig hergestellt, wobei es insbesondere im Fall der einstückigen Bauweise von Vorteil ist, die beiden Antennenelemente 2 a, 2 b, als Blechteil auszubilden und vorzugsweise mittels eines Stanzbiegeverfahrens herzustellen. Ein solches Blechteil hat den Vorteil, dass es hervorragende elektrische Eigenschaften zum Senden und/oder Empfangen hochfrequenter Signale aufweist, während die gewünschte Formgebung schnell, einfach und kostengünstig mittels des Stanzbiegeverfahrens erzielt werden kann. Außerdem hat ein solches Blechteil den Vorteil, dass es sich im Bereich des Speisepunktes 3 bzw. des Masseanschlusses 4 mit den zugehörigen elektrisch leitfähigen Bereichen des Masseelementes 1 leicht elektrisch verbinden, insbesondere verlöten läßt. Alternativ zu einer Ausgestaltung der Antennenelemente 2 a, 2 b als Blechteil kommen auch hier Leiterplatten mit flächigen, elektrisch leitfähigen Bereichen in Betracht.The two antenna elements 2 a, 2 b, are separate components or manufactured in one piece, it being particularly advantageous in the case of one-piece design, the two antenna elements 2 a, 2 b, form as a sheet metal part and preferably by means of a stamping process. Such a sheet metal part has the advantage that it has excellent electrical properties for transmitting and / or receiving high-frequency signals, while the desired shape can be achieved quickly, easily and inexpensively by means of the punch bending process. In addition, such a sheet metal part has the advantage that it can easily be electrically connected, in particular soldered, in the region of the feed point 3 or the ground connection 4 to the associated electrically conductive regions of the mass element 1. As an alternative to an embodiment of the antenna elements 2 a, 2 b as a sheet metal part, printed circuit boards with flat, electrically conductive areas are also suitable here.

Nach Herstellung des "Innenlebens" der Mobilfunkantenne, wie es in der Figur dargestellt ist, wird das Kabel angebracht und diese Einheit in ein Gehäuse eingesetzt und das Gehäuse verschlossen. Danach steht die fertige Mobilfunkantenne für den Einsatz in einem Fahrzeug oder für die Anbringung an einem Fahrzeug zur Verfügung. Die flächige Erstreckung des Masseelementes 1 entspricht weitestgehend den Antennenelementen 2 a, 2 b, wobei es denkbar ist, auch mehr als zwei Antennenelemente einzusetzen. Insbesondere kommt auch noch der Einsatz eines GPS-Empfangsmoduls in Betracht, das als fertige Einheit auf dem Masseelement 1 angeordnet werden kann. In diesem Fall bietet es sich an, die freie Fläche des Masseelementes 1 gemäß der Figur für die Anbringung des GPS-Empfangsmoduls zu nutzen. Insbesondere in diesem Fall ist die halbovale Form der Antennenelement 2a, 2b von besonderem Vorteil, da diese in einem ausreichenden Abstand zu dem GPS-Empfangsmodul angeordnet werden können, um gegenseitige Beeinflussungen in Form von Störstrahlungen zu reduzieren oder zu vermeiden.After making the "inner life" of the mobile radio antenna, as shown in the figure, the cable is attached and this unit is inserted into a housing and the housing is closed. Thereafter, the finished mobile antenna is available for use in a vehicle or for attachment to a vehicle. The planar extent of the mass element 1 largely corresponds to the antenna elements 2 a, 2 b, wherein it is conceivable to use more than two antenna elements. In particular, the use of a GPS receiver module is also considered, which can be arranged as a finished unit on the mass element 1. In this case, it makes sense, the free surface of the mass element 1 according to the figure for attachment of the GPS receiver module. In particular, in this case, the semi-oval shape of the antenna element 2a, 2b is particularly advantageous, since they can be arranged at a sufficient distance from the GPS receiver module to reduce or avoid mutual interference in the form of interference radiation.

Es ist weiterhin denkbar, die Grundplatte auch aus einem Druckguß herzustellen. Ebenso ist es denkbar, dass anstelle eines Kunststoffgehäuses, insbesondere anstelle dessen Unterteil, mit dem die Antenne an dem Fahrzeugbauteil befestigbar ist, ein Teil des Gehäuses aus einer Grundplatte aus einem Druckguß (zum Besipiel Messing) oder in einem Stanzbiegeverfahren hergestellt wird. Dann ist diese Grundplatte planparallel (koplanar) zu dem Masseelement, insbesondere der Leiterplatte, angeordnet. Die Befestigung erfolgt dann zum Beispiel über eine Schraubverbindung (insbesondere mittels eines Gewindezapfens an der Grundplatte) oder eine Klebeverbindung (insbesondere eine zweiseitige Klebefolie zwischen der Unterseite des Gehäuses der Antenne und der Oberfläche des Fahrzeugbauteils.It is also conceivable to produce the base plate also from a die-cast. It is also conceivable that instead of a plastic housing, in particular instead of the lower part, with which the antenna is fastened to the vehicle component, a part of the housing is made of a base plate of a die-cast (for example brass) or in a stamping bending process. Then, this base plate is plane-parallel (coplanar) to the mass element, in particular the circuit board arranged. The attachment is then for example via a screw (in particular by means of a threaded pin on the base plate) or an adhesive bond (in particular a two-sided adhesive film between the underside of the housing of the antenna and the surface of the vehicle component.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1.1.
Masseelementmass element
2 a2 a
Antennenelementantenna element
2 b2 B
Antennenelementantenna element
33
Speisepunktfeedpoint
44
Masseanschlußearth terminal

Claims (9)

Mobilfunkantenne für ein Fahrzeug zum Empfangen und/oder Senden hochfrequenter Signale bestimmter Dienste mit einem flächig gestalteten Masseelement (1) und zumindest einem planparallel darüber angeordneten Antennenelement (2 a) dadurch gekennzeichnet, dass das Antennenelement (2 a) oval oder halbovalförmig ausgebildet ist.Mobile antenna for a vehicle for receiving and / or transmitting high-frequency signals of certain services with a mass element (1) and at least one plane-parallel arranged antenna element (2 a), characterized in that the antenna element (2 a) is oval or semi-oval. Mobilfunkantenne nach Anspruch 1, dadurch gekennzeichnet, dass in dem Antennenelement (2 a) ein weiteres, ebenfalls ovales oder halbovalförmiges Antennenelement (2 b) in der gleichen Ebene angeordnet ist, wobei zwischen den beiden Antennenelementen (2 a, 2 b) ein Schlitz vorhanden ist.Mobile antenna according to claim 1, characterized in that in the antenna element (2 a) another, also oval or halbovalförmiges antenna element (2 b) is arranged in the same plane, wherein between the two antenna elements (2 a, 2 b) a slot present is. Mobilfunkantenne nach Anspruch 2, dadurch gekennzeichnet, dass der Schlitz oval oder halbovalförmig verläuft.Mobile antenna according to claim 2, characterized in that the slot is oval or semi-oval. Mobilfunkantenne nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die Breite des Schlitzes in seinem Verlauf gleich bleibt oder sich ändert.Mobile radio antenna according to claim 2 or 3, characterized in that the width of the slot remains the same in its course or changes. Mobilfunkantenne nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das eine Antennenelement (2 a), insbesondere beide Antennenelemente (2 a, 2 b), über einen Speisepunkt (3) und einem Masseanschluss (4) mit dem Masseelement (1) verbunden sind.Mobile radio antenna according to one of the preceding claims, characterized in that the one antenna element (2 a), in particular both antenna elements (2 a, 2 b), via a feed point (3) and a ground terminal (4) to the ground element (1) are connected , Mobilfunkantenne nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Masseelement (1) als Leiterplatte mit darauf angeordneten elektrisch leitfähigen Bereiche ausgebildet ist.Mobile radio antenna according to one of the preceding claims, characterized in that the mass element (1) is designed as a printed circuit board with arranged thereon electrically conductive regions. Mobilfunkantenne nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Antennenelemente (2 a, 2 b) als Blechteil ausgebildet und vorzugsweise mittels eines Stanzbiegeverfahrens herstellbar sind.Mobile radio antenna according to one of the preceding claims, characterized in that the antenna elements (2 a, 2 b) formed as a sheet metal part and preferably by means of a stamping bending process can be produced. Mobilfunkantenne nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Mobilfunkantenne ein Gehäuse aus Kunststoff aufweist, wobei die Innenkontur des Gehäuses dem Masseelement (1) und dem zumindest einen Antennenelement (2 a) angepaßt ist.Mobile radio antenna according to one of the preceding claims, characterized in that the mobile radio antenna has a housing made of plastic, wherein the inner contour of the housing is adapted to the mass element (1) and the at least one antenna element (2 a). Mobilfunkantenne nach einem der Ansprüche 3 bis 8, dadurch gekennzeichnet, dass im Bereich des Schlitzes ein Dielektrikum zur Verbesserung der Antenneneigenschaften vorhanden ist.Mobile radio antenna according to one of claims 3 to 8, characterized in that in the region of the slot, a dielectric for improving the antenna properties is present.
EP06013683A 2005-08-12 2006-07-01 Planar mobile radio antenna for a vehicle Withdrawn EP1753081A1 (en)

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DE102005038196A DE102005038196A1 (en) 2005-08-12 2005-08-12 Low-profile mobile radio antenna for a vehicle

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EP0575211A1 (en) * 1992-06-16 1993-12-22 AEROSPATIALE Société Nationale Industrielle Radiating element of an antenna with wide bandwidth and antenna array comprising such elements
EP1011167A1 (en) * 1998-07-02 2000-06-21 Matsushita Electric Industrial Co., Ltd. Antenna unit, communication system and digital television receiver
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