WO2007104568A1 - Antenne tige multibande à ressort spiral pour véhicules à moteur et procédé de fabrication associé - Google Patents

Antenne tige multibande à ressort spiral pour véhicules à moteur et procédé de fabrication associé Download PDF

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Publication number
WO2007104568A1
WO2007104568A1 PCT/EP2007/002301 EP2007002301W WO2007104568A1 WO 2007104568 A1 WO2007104568 A1 WO 2007104568A1 EP 2007002301 W EP2007002301 W EP 2007002301W WO 2007104568 A1 WO2007104568 A1 WO 2007104568A1
Authority
WO
WIPO (PCT)
Prior art keywords
bending spring
elastic
coil
rod
elastic bending
Prior art date
Application number
PCT/EP2007/002301
Other languages
German (de)
English (en)
Inventor
Gerhard Vogt
Christian Magg
Mohamed Slimani
Original Assignee
Kathrein-Werke Kg
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 Kathrein-Werke Kg filed Critical Kathrein-Werke Kg
Publication of WO2007104568A1 publication Critical patent/WO2007104568A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/40—Radiating elements coated with or embedded in protective material
    • H01Q1/405—Radome integrated radiating elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • H01Q1/325—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle
    • H01Q1/3275—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle mounted on a horizontal surface of the vehicle, e.g. on roof, hood, trunk
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/08—Helical 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

Definitions

  • the invention relates to a rod antenna, in particular for motor vehicles according to the preamble of claim 1 and a method for the production thereof according to claim 11.
  • Antenna emitters are commonly used in motor vehicles as rooftop mounted combination antennas. Such motor vehicle antennas serve for a reception of radio programs. In addition, these antennas usually serve as mobile antennas. In addition, additional services and specific customer requirements such as e.g. a radio central locking (FZV), a so-called Weatherband (WB) or a DAB band III (digital audio broadcasting) be integrated. In addition, the antenna can also work in other frequency ranges and / or other services may be provided.
  • FZV radio central locking
  • WB Weatherband
  • DAB band III digital audio broadcasting
  • An important component of a motor vehicle antenna represents the antenna conductor, which is designed and arranged differently depending on the type and number of function to be performed.
  • the individual antenna structures are usually conductively connected to one another and are then combined to form a unit in the form of a rod antenna.
  • a generic rod antenna is known for example from DE 41 41 783 B4.
  • an antenna foot-side metallic rod part in the axial extension of which a dielectric round rod is connected.
  • An antenna wire which is wound around the dielectric round rod into a coil, is galvanically connected to the antenna base-side metallic rod part.
  • the antenna wire is wound in a first section on block, so that touch the individual windings of the coil-shaped antenna conductor. In an adjoining section, the antenna conductor is wound at a greater pitch at a distance.
  • the antenna base has a threaded bolt-like connection to a flexible elastic spring 16, at whose end remote from the antenna base then the said dielectric rod is provided and fixed, on which an antenna conductor at a distance is wound.
  • the antenna must be galvanically contacted with the flexurally elastic spring.
  • the bending spring further projects a ladder part in a partial length of the spiral spring, so that here a blocking circuit for the frequency of mobile communication is formed, with a length corresponding to the length of the protruding into the bending spring ladder part. It is questionable whether such a parallel resonant circuit is necessary at all.
  • this design has the disadvantage that the spiral spring can not be bent again in the region of the conductor part introduced into it, that is to say the size of the bending region is thereby reduced again by the elasticity of the antenna spring.
  • the above-described known antenna structure is usually wound around a rod made of fiberglass, wherein these coils are arranged in series for the realization of several electrical functions. This causes the antenna radiator to become stiff, especially in the region of the dielectric rod.
  • the relatively long length of the antenna radiator results in many vehicles to severe restrictions on the design freedom.
  • due to the plastic rod system stiffness above the flexible spring leads to possible collisions when hitting external obstacles. This can lead to considerable damage to the antenna radiator or even to the distortion of the vehicle panel.
  • such antenna radiators therefore have a number of disadvantages due to the required overall height and complex system structure.
  • these complex and heterogeneous system structures also require that the antenna radiator becomes a reservoir for unpredictable error sources and quality defects, which can lead to impairment of the electrical function.
  • detected errors or deficiencies, if any, could only be remedied with great effort.
  • An antenna with a flexible antenna rod made of a self-supporting helical spring with an elastic layer surrounding the helix spring has also become known from DE 23 57 542 A1. It is a bending elastic spring device running at a uniform pitch, whose individual turns are wound at a distance. The area inside the spiral spring is empty. The distance between the turns of the spiral spring is provided with a spiral spring also outwardly covering elastic layer of an insulating material rubber elastic elasticity, in which the coil spring is embedded.
  • the coil spring is first attached to a cylindrical mandrel, which is slightly longer than the coil spring.
  • the coil spring is then wrapped in a piece of starting rubber material and placed in corresponding receptacles of a mold of two mold halves with the ends of the receiving mandrel projecting from both sides of the coil spring. Then the two mold halves are pressed together and heated so that the rubber material is vulcanized. After vulcanization, the mold is opened and the finished antenna rod removed.
  • a rod-shaped antenna in particular for a mobile device (mobile phone), can also be taken from EP 0 847 102 A2 as known.
  • the object of the present invention is to provide, on the basis of the aforementioned generic state of the art, an otherwise improved rod antenna and a method for the production thereof, wherein the rod antenna should have good electrical properties.
  • the risk of sources of error should be avoided. This should preferably be achievable at a lower assembly and manufacturing costs.
  • an electrically very efficient rod antenna is created, which is highly flexible and, compared to conventional solutions, has only a comparatively short axial extent.
  • the manufacturing and assembly costs are comparatively low.
  • the space-saving design also reduces the potential risk of collisions with external obstacles.
  • the rod antenna according to the invention has a short axia
  • the structure is very flexible and highly flexible. It may be equipped for a plurality of reception areas and / or services, preferably for simultaneous operation in at least three frequency ranges and / or for at least three services (for example for receiving radio programs, for transmitting mobile telephone calls, for providing a centralized radio interlock, for a weather station). Band, etc.).
  • the specially manufactured antenna conductor which may be wound differently in terms of the type and number of frequency ranges, is formed from a spring steel which is provided with an outer insulation. This makes it possible to electrically isolate the windings from each other, so as to realize also wound on block coils. Another subsequent antenna section may then have a larger pitch for the individual coil windings.
  • these at least two winding sections are formed by a continuous antenna conductor to provide no galvanic contact point here. This eliminates otherwise necessary and error-prone connection measures of the individual radiator structures.
  • the coil design according to the invention itself is formed by the spiral spring, so the elastic bending spring, this is not necessary as an additional, the axial height increasing technical measure to ensure the flexibility of the rod antenna. Since a dielectric, non-bendable plastic carrier material for the antenna conductor thus also disappears, the rod antenna according to the invention as a whole is highly flexible and at the same time has an axially short design. The production of the antenna radiator off The mentioned coated spring steel thus makes it possible for the spotlight on the one hand to give the necessary stability and flexibility in the external loads occurring and on the other hand to prevent damage to the antenna conductor and thus impairment of its electrical function.
  • the rod antenna formed in this way can be produced by first providing the coil construction with a first so-called inward coating after inserting a rod-shaped metal core into the coil winding, after it has preferably been placed and contacted on an antenna foot-side connection bolt the spool was clamped between tool jaws).
  • the coil construction thus provided which is provided with an inner encapsulation, can then be provided with an (elastic) outer encapsulation surrounding the entire antenna, by inserting the antenna into a corresponding tool and then encapsulating it.
  • a corresponding elastic rod preferably plastic rod, preferably consisting of polyoxymethylene (POM), are used, whereby the elasticity of the entire antenna is significantly influenced again.
  • POM polyoxymethylene
  • the bending-elastic see spring is produced with different winding sections.
  • the elastic bending spring can have a winding section, in which the individual turns are wound at a distance. Since the elastic bending spring is provided with an insulating layer, it may also have other coil sections in which the individual turns are wound on contact.
  • This spiral spring is the first to be made. Only in a second step is an internal encapsulation provided, which covers the coil winding in the interior and penetrates between the individual winding sections (at least where the coil is wound at a distance) and fills this spacer space and thereby the bending spring and its winding spacings stabilized. The individual winding sections are essentially still recognizable from the outside. Only then in a further step, the thus prepared and stabilized flexural elastic spring is encapsulated with an outer plastic sheath.
  • FIG. 1 shows a schematic side view of the basic construction of the bar antenna according to the invention.
  • Figure 2 a corresponding axial section of a total completed rod antenna.
  • connection device 1 in the form of a connecting bolt I 1 , which is formed in the embodiment shown in the manner of a screw bolt. It is electrically conductive and is preferably made of metal. This connection device 1 is thus part of an antenna or connection foot 3.
  • the connecting bolt 1 ' may be formed so that it can be mechanically anchored and electrically contacted by a suitable fastening device on the motor vehicle side in a detachable manner.
  • a suitable fastening device on the motor vehicle side in a detachable manner.
  • an external thread can be provided here on the connecting bolt I 1 in order to screw the connecting bolt 1 'on the motor vehicle side into a corresponding threaded bushing.
  • connection side 5 joins in the axial extension of the connecting bolt 1 ', a coil-shaped radiating element 9, in the form of an antenna conductor 9 ".
  • the coil-shaped antenna conductor 9 is wound over an axial length of the bolt-shaped connection device 1 at the end 1a of the connection device opposite the connection side 5 and is connected to the end 9a of the antenna conductor 9 'at a point 11, for example Crimp connection 12 is electrically contacted and is thereby held on the connection device 1.
  • the radiator element 9 with the coil-shaped antenna conductor 9 ' is divided into at least two axially offset regions, namely in a first But both coil sections 13, 15 are formed by a continuous antenna conductor 9 1 , namely while avoiding a separatemaschinetechniks- point between two coil sections.
  • the radiator element 9 consisting of the at least two coil sections 13, 15 is formed in the context of the invention from a spring steel wire, so that the first and second coil section 13, 15 simultaneously form an elastic bending spring 17.
  • This elastic bending spring 17 is provided, at least in a partial length, preferably in its entire length or almost to its entire length, with an insulating or plastic coating or sheathing, which makes it possible to have at least one coil section, namely the second one in the embodiment shown Coil section 15 to wind on block.
  • the coil turns are wound on contact, the individual coil turns being not electrically connected by their insulating or plastic coating.
  • the structure and the axial dimensioning of the individual sections is, for example, such that in the exemplary embodiment shown, three areas A, B and C adjoining in the axial direction are formed, the area A being at least approximately or approximately the axial length of the bolt-shaped connection device 1, the area B the first coil portion 13 wound at a distance and the portion C corresponding to the second coil portion 15 wound on the block.
  • this so constructed rod antenna for receiving and / or transmitting for at least three services, preferably in at least three frequency ranges.
  • the first axial region A corresponds at least approximately to the axial length of the bolt-shaped connection device and serves, for example, for transmitting and / or receiving signals for the mobile radio range, ie in a first frequency range, whereby a first service S1 is made available.
  • the total area S2 formed from the axial area A and B serves, for example, for receiving the WB band (weather band) or, for example, for a radio central locking (FZV).
  • WB band weather band
  • FZV radio central locking
  • the third section S3 of the antenna radiator structure formed of the three areas A, B and C can be used to receive the radio frequencies.
  • At least one further coil section can adjoin the first and second coil sections 13, 15, this at least one further coil section (not shown in the drawings) likewise being formed by a continuous common antenna conductor 9 1 ,
  • the rod antenna thus formed can be manufactured by having the coil construction, preferably at one end, on an antenna base side
  • Connection pin is placed and contacted there, first after insertion of one of the open coil side 21st
  • Tool jaws - for example in the form of two half-cylindrical mold halves - was clamped).
  • an inner plastic layer 23 is formed, which surrounds the coil at least in a substantial axial length and, in particular, fills the spaces between the individual windings.
  • the two cooperating tool jaws or mold halves can also be designed, at least in a partial peripheral area, in a certain circumferential area of the spiral spring to not enclose them on their outer circumference under contact, so that the so-called inner plastic layer 23 is at least slightly individual in these areas Sections of the turns of the spiral spring also outside can still cover with.
  • the vast area of the coil spring is still recognizable.
  • the coil construction thus formed provided with an inner encapsulation in the form of a plastic layer 23, can then be connected to a further (preferably) elastic outer plastic protective covering 27, preferably the entire or almost the entire antenna be provided by the antenna is inserted into a corresponding tool and then encapsulated.
  • a corresponding elastic rod preferably plastic rod 25, preferably consisting of polyoxymethylene (POM)
  • POM polyoxymethylene
  • the inner plastic layer 23 is made and then the outer elastic plastic layer 25 is applied to finally introduce the plastic rod 25 inside as the last step.
  • the threaded bolt 1, 1 ' is electrically-galvanically connected to the antenna conductor 9 1, preferably by a crimp connection 12, and that the emitter system as a whole is encapsulated twice in order to provide the necessary stability and the required protection, namely with one rather, inner rubber-elastic plastic material 23 and elastic outer sheath 27.
  • the preferably final inserted rod 25 serves to support the flexibility characteristics of the antenna radiator and close the manufacturing process related opening.
  • the inserted rod 25 is made of a material having the desired elastic properties in order to give the antenna as a whole exactly that elasticity, the it is asked for.
  • the preferred material consists of polyoxymethylene. This material is characterized by its excellent resilience.
  • this winding end is, for example wound on distance and, optionally, to the cylindrical connecting pin I 1 a corresponding helical structure is engraved on the outer periphery, in which the windings can be screwed at the terminal end of the spiral spring 17th
  • a corresponding adaptation of the winding diameter or outside diameter of the connecting bolt I 1 With a corresponding adaptation of the winding diameter or outside diameter of the connecting bolt I 1 , a good mechanical and electrical connection between the bending spring 17 and the connecting bolt 1 ', ie the bolt-shaped connecting device 1 , is thereby ensured.
  • the bending spring 17 By fastening the bending spring 17 to the connecting bolt 1 ', the bending spring 17 is held over the connecting bolt 1'.

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  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)

Abstract

L'invention concerne une antenne tige perfectionnée qui présente les caractéristiques suivantes: un pied d'antenne (3), un élément rayonnant (9) maintenu sur le pied d'antenne (3) et doté d'un ensemble bobine formé d'un conducteur d'antenne (91), l'ensemble bobine comportant au moins deux sections de bobine (13,15) à décalage axial mutuel. Au moins une section de bobine (13) est enroulée avec un espacement, au moins une autre section de bobine (15) est enroulée en bloc. Au moins dans la section de bobine (15) enroulée en bloc, le conducteur d'antenne (91) est entouré d'une couche isolante ou d'une enveloppe isolante. L'antenne tige comprend un ressort spiral (17) élastique qui est fixé au moins indirectement sur le pied d'antenne (2), la première et la deuxième section de bobine (13,15) étant formées par ce ressort spiral (17) élastique.
PCT/EP2007/002301 2006-03-16 2007-03-15 Antenne tige multibande à ressort spiral pour véhicules à moteur et procédé de fabrication associé WO2007104568A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006012193.7 2006-03-16
DE102006012193A DE102006012193A1 (de) 2006-03-16 2006-03-16 Stabantenne, insbesondere für Kraftfahrzeuge

Publications (1)

Publication Number Publication Date
WO2007104568A1 true WO2007104568A1 (fr) 2007-09-20

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PCT/EP2007/002301 WO2007104568A1 (fr) 2006-03-16 2007-03-15 Antenne tige multibande à ressort spiral pour véhicules à moteur et procédé de fabrication associé

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Country Link
DE (2) DE202006020780U1 (fr)
WO (1) WO2007104568A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2488227A (en) * 2011-02-15 2012-08-22 Harada Ind Co Ltd A compact flexible monopole antenna

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2357542A1 (de) * 1973-11-17 1975-05-22 Bosch Elektronik Gmbh Antenne mit einem biegsamen antennenstab aus einer selbsttragenden schraubenfeder und einer die schraubenfeder umgebenden elastischen schicht
DE4141783A1 (de) * 1991-01-31 1993-06-24 Kolbe & Co Hans Kraftfahrzeug-antenne fuer mehrere getrennte frequenzbereiche
JPH10322122A (ja) * 1997-05-20 1998-12-04 Nippon Antenna Co Ltd デュアルバンドアンテナ
US5914689A (en) * 1997-06-25 1999-06-22 Centurion Intl., Inc. Antenna for a portable, wireless communication device
WO1999048167A1 (fr) * 1998-03-19 1999-09-23 Smarteq Ab Dispositif d'antenne pourvu d'un organe de fixation magnetique et d'un organe de couplage de mise a la terre pouvant fonctionner a des frequences multiples
EP0997970A1 (fr) * 1997-01-28 2000-05-03 Yokowo Co., Ltd. Antenne a installer sur un vehicule, element d'antenne, et procede de fabrication
WO2000077885A1 (fr) * 1999-06-16 2000-12-21 Avantego Ab Agencement d'antenne
EP1291967A1 (fr) * 2001-02-26 2003-03-12 Nippon Antena Kabushiki Kaisha Antenne multifrequence

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10173421A (ja) 1996-12-05 1998-06-26 Harada Ind Co Ltd 携帯送受信機用棒状アンテナ

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2357542A1 (de) * 1973-11-17 1975-05-22 Bosch Elektronik Gmbh Antenne mit einem biegsamen antennenstab aus einer selbsttragenden schraubenfeder und einer die schraubenfeder umgebenden elastischen schicht
DE4141783A1 (de) * 1991-01-31 1993-06-24 Kolbe & Co Hans Kraftfahrzeug-antenne fuer mehrere getrennte frequenzbereiche
EP0997970A1 (fr) * 1997-01-28 2000-05-03 Yokowo Co., Ltd. Antenne a installer sur un vehicule, element d'antenne, et procede de fabrication
JPH10322122A (ja) * 1997-05-20 1998-12-04 Nippon Antenna Co Ltd デュアルバンドアンテナ
US5914689A (en) * 1997-06-25 1999-06-22 Centurion Intl., Inc. Antenna for a portable, wireless communication device
WO1999048167A1 (fr) * 1998-03-19 1999-09-23 Smarteq Ab Dispositif d'antenne pourvu d'un organe de fixation magnetique et d'un organe de couplage de mise a la terre pouvant fonctionner a des frequences multiples
WO2000077885A1 (fr) * 1999-06-16 2000-12-21 Avantego Ab Agencement d'antenne
EP1291967A1 (fr) * 2001-02-26 2003-03-12 Nippon Antena Kabushiki Kaisha Antenne multifrequence

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2488227A (en) * 2011-02-15 2012-08-22 Harada Ind Co Ltd A compact flexible monopole antenna
GB2488227B (en) * 2011-02-15 2014-10-22 Harada Ind Co Ltd Vehicle pole antenna

Also Published As

Publication number Publication date
DE202006020780U1 (de) 2010-02-18
DE102006012193A1 (de) 2007-09-20

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