EP0443088B1 - Rod antenna for at least two frequency ranges - Google Patents

Rod antenna for at least two frequency ranges Download PDF

Info

Publication number
EP0443088B1
EP0443088B1 EP90117741A EP90117741A EP0443088B1 EP 0443088 B1 EP0443088 B1 EP 0443088B1 EP 90117741 A EP90117741 A EP 90117741A EP 90117741 A EP90117741 A EP 90117741A EP 0443088 B1 EP0443088 B1 EP 0443088B1
Authority
EP
European Patent Office
Prior art keywords
bar
conductive
shaped radiator
radiator according
coverings
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
EP90117741A
Other languages
German (de)
French (fr)
Other versions
EP0443088A2 (en
EP0443088A3 (en
Inventor
Horst Dörrie
Uwe Dipl.-Ing. Militz
Heinrich Dipl.-Ing. Wilken
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0443088A2 publication Critical patent/EP0443088A2/en
Publication of EP0443088A3 publication Critical patent/EP0443088A3/en
Application granted granted Critical
Publication of EP0443088B1 publication Critical patent/EP0443088B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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 is based on a rod-shaped radiator according to the preamble of claim 1.
  • Such a radiator is known (DE 89 O8 175 U1), which is suitable for radio traffic and for radio reception (VHF, K, M, L), particularly in vehicles.
  • the known radiator has the disadvantage that its bandwidth is too small for certain applications of the radiator.
  • the invention has for its object to develop the rod-shaped radiator according to the preamble of claim 1 such that the bandwidth of the radiator increases both in the direction of higher and lower frequencies with little technical effort.
  • a preferred field of application for the rod-shaped radiator is a vehicle radio antenna, which is preferably also suitable for radio reception with a car radio.
  • Fig. 1 10 denotes a rod-shaped radiator for different frequency ranges, for example the radio range and the long, medium, short and ultra-short wave broadcasting range.
  • the radiator comprises a cylindrical rod 11 made of a dielectric material, preferably of glass fiber, which contains a coaxial inner conductor 12 which extends over the entire length of the radiator.
  • the rod 11 has a length of approximately 3/2 ⁇ , where ⁇ is the average operating wavelength of the radio range in question.
  • a lower length range of the rod 11 has a length L1 of approximately ⁇ / 2 and carries a first thin, conductive coating 13.
  • a medium length range of the rod which also has a length L2 of approximately ⁇ / 2, carries a second thin, conductive coating 14. There is a distance a between the two conductive coverings 13 and 14, so that the coverings are insulated from one another.
  • an inner conductor end 23 of the inner conductor 12 emerges from the latter. It is bent around the end of the rod and connected to the first conductive coating 13 in a conductive manner, for example by soldering.
  • the conductive covering 13 can be guided around the lower end face of the rod 11 and the inner conductor end 23, which is shorter in this case, can reach through the end covering, be radially bent and conductively connected to the end covering.
  • the lower end of the rod is in a recess 15 of a threaded bolt 16, which is used to fasten the radiator to a foot piece connected to a wall, for example a vehicle body.
  • the entire length L of the radiator 10 comes into effect during radio reception.
  • radio traffic that takes place in a comparatively high frequency range for example between 450 ... 470 MHz, only the lower and upper part comes into effect.
  • rod 17 which tapers conically from the base point of the radiator and likewise carries two conductive coverings 18 and 19, as in the exemplary embodiment according to FIG. 1.
  • a cylindrical rod 20 is shown, which is provided in place of the pads 13, 14 of FIG. 1 with two conductive braids 21 and 22.
  • the conductive braids are pushed onto the rod 20, for example.
  • the foils and the tube parts are preferably made of copper and can be injected into the rod 27 during the manufacture of the radiator, so that the foils or tube parts do not protrude beyond the outer surface of the rod 27.
  • radiators shown in FIGS. 1 to 4 are covered, for example, with an insulating tube, which is preferably a shrink tube; see. the hose 28 shown shortened in FIG. 4.
  • an insulating tube which is preferably a shrink tube; see. the hose 28 shown shortened in FIG. 4.

Description

Die Erfindung geht von einem stabförmigen Strahler nach dem Oberbegriff des Anspruchs 1 aus.The invention is based on a rod-shaped radiator according to the preamble of claim 1.

Stand der TechnikState of the art

Es ist ein derartiger Strahler bekannt (DE 89 O8 175 U1), der für den Funkverkehr und für den Rundfunkempfang (UKW, K, M, L) insbesondere in Fahrzeugen geeignet ist. Der bekannte Strahler hat den Nachteil, daß seine Bandbreite für bestimmte Anwendungen des Strahlers zu gering ist.Such a radiator is known (DE 89 O8 175 U1), which is suitable for radio traffic and for radio reception (VHF, K, M, L), particularly in vehicles. The known radiator has the disadvantage that its bandwidth is too small for certain applications of the radiator.

Aufgabetask

Der Erfindung liegt die Aufgabe zugrunde, den stabförmigen Strahler gemäß dem Oberbegriff des Anspruchs 1 derart weiterzubilden, daß sich bei geringem technischem Aufwand die Bandbreite des Strahlers sowohl in Richtung auf höhere als auch auf tiefere Frequenzen vergrößert.The invention has for its object to develop the rod-shaped radiator according to the preamble of claim 1 such that the bandwidth of the radiator increases both in the direction of higher and lower frequencies with little technical effort.

Lösungsolution

Diese Aufgabe wird bei einem stabförmigen Strahler gemäß dem Oberbegriff des Anspruchs 1 durch die im kennzeichnenden Teil dieses Anspruchs angegebenen Merkmale gelöst. Der mit der Erfindung erzielbare Vorteil besteht insbesondere darin, daß der eine Gewinnantenne bildende stabförmige Strahler eine größere Bandbreite und außerdem über seine gesamte Länge eine gleichmäßige Dicke bzw. Konizität aufweist.This object is achieved in a rod-shaped radiator according to the preamble of claim 1 by the features specified in the characterizing part of this claim. The advantage that can be achieved with the invention is, in particular, that the rod-shaped radiator forming a gain antenna has a larger bandwidth and also has a uniform thickness or taper over its entire length.

Ein bevorzugtes Anwendungsgebiet für den stabförmigen Strahler ist eine Fahrzeug-Funkantenne, die vorzugsweise auch für den Rundfunkempfang mit einem Autoradio geeignet ist.A preferred field of application for the rod-shaped radiator is a vehicle radio antenna, which is preferably also suitable for radio reception with a car radio.

Beschreibungdescription

Vier Ausführungsbeispiele der Erfindung sind in der Zeichnung an Hand mehrerer Figuren dargestellt und werden im folgenden näher erläutert. Es zeigen

Fig. 1
einen stabförmigen Strahler in einer ersten Ausführungsform,
Fig. 2
einen stabförmigen Strahler in einer zweiten Ausführungsform,
Fig. 3
einen stabförmigen Strahler in einer dritten Ausführungsform und
Fig. 4
einen stabförmigen Strahler in einer vierten Ausführungsform, teilweise im Schnitt.
Four exemplary embodiments of the invention are shown in the drawing using several figures and are explained in more detail below. Show it
Fig. 1
a rod-shaped radiator in a first embodiment,
Fig. 2
a rod-shaped radiator in a second embodiment,
Fig. 3
a rod-shaped radiator in a third embodiment and
Fig. 4
a rod-shaped radiator in a fourth embodiment, partly in section.

In Fig. 1 bezeichnet 10 einen stabförmigen Strahler für verschiedene Frequenzbereiche, zum Beispiel den Funkbereich und den Lang-, Mittel-, Kurz- und Ultrakurzwellen-Rundfunkbereich. Der Strahler umfaßt einen zylindrischen Stab 11 aus einem dielektrischen Material, vorzugsweise aus Glasfiber, der einen sich über die gesamte Länge des Strahlers ersteckenden koaxialen Innenleiter 12 enthält. Der Stab 11 hat eine Länge von etwa 3/2 λ, wobei λ die mittlere Betriebswellenlänge des betreffenden Funkbereiches ist. Ein unterer Längenbereich des Stabes 11 hat eine Länge L1 von etwa λ/2 und trägt einen ersten dünnen, leitenden Belag 13. Ein mittlerer Längenbereich des Stabes, der eine Länge L2 von ebenfalls etwa λ/2 hat, trägt einen zweiten dünnen, leitenden Belag 14. Zwischen den beiden leitenden Belägen 13 und 14 besteht ein Abstand a, so daß die Beläge gegeneinander isoliert sind.In Fig. 1, 10 denotes a rod-shaped radiator for different frequency ranges, for example the radio range and the long, medium, short and ultra-short wave broadcasting range. The radiator comprises a cylindrical rod 11 made of a dielectric material, preferably of glass fiber, which contains a coaxial inner conductor 12 which extends over the entire length of the radiator. The rod 11 has a length of approximately 3/2 λ, where λ is the average operating wavelength of the radio range in question. A lower length range of the rod 11 has a length L1 of approximately λ / 2 and carries a first thin, conductive coating 13. A medium length range of the rod, which also has a length L2 of approximately λ / 2, carries a second thin, conductive coating 14. There is a distance a between the two conductive coverings 13 and 14, so that the coverings are insulated from one another.

Am unteren Ende des Stabes 11 tritt aus diesem ein Innenleiterende 23 des Innenleiters 12 aus. Es ist um das Stabende herumgebogen und mit dem ersten leitenden Belag 13 leitend, zum Beispiel durch Löten, verbunden. Alternativ kann der leitende Belag 13 um die untere Stirnseite des Stabes 11 herumgeführt sein und das in diesem Fall kürzere Innenleiterende 23 durch den stirnseitigen Belag hindurchgreifen, radial abgebogen und mit dem stirnseiten Belag leitend verbunden sein.At the lower end of the rod 11, an inner conductor end 23 of the inner conductor 12 emerges from the latter. It is bent around the end of the rod and connected to the first conductive coating 13 in a conductive manner, for example by soldering. Alternatively, the conductive covering 13 can be guided around the lower end face of the rod 11 and the inner conductor end 23, which is shorter in this case, can reach through the end covering, be radially bent and conductively connected to the end covering.

Das untere Stabende steckt in einer Vertiefung 15 eines Gewindebolzens 16, der zur Befestigung des Strahlers an einem mit einer Wand, zum Beispiel einer Fahrzeugkarosserie, verbundenen Fußstück dient.The lower end of the rod is in a recess 15 of a threaded bolt 16, which is used to fasten the radiator to a foot piece connected to a wall, for example a vehicle body.

Beim Rundfunkempfang kommt die gesamte Länge L des Strahlers 10 zur Wirkung. Für den Funkverkehr, der in einem vergleichsweise hohen Frequenzbereich stattfindet, zum Beispiel zwischen 450 ... 470 MHz, kommt nur der untere und obere Teil zur Wirkung.The entire length L of the radiator 10 comes into effect during radio reception. For radio traffic that takes place in a comparatively high frequency range, for example between 450 ... 470 MHz, only the lower and upper part comes into effect.

Wie in Fig. 2 gezeigt, kann auch ein sich vom Fußpunkt des Strahlers aus konisch verjüngender Stab 17 angewendet werden, der wie in dem Ausführungsbeispiel nach Fig. 1 ebenfalls zwei leitende Beläge 18 und 19 trägt.As shown in FIG. 2, it is also possible to use a rod 17 which tapers conically from the base point of the radiator and likewise carries two conductive coverings 18 and 19, as in the exemplary embodiment according to FIG. 1.

In Fig. 3 ist ein zylindrischer Stab 20 gezeigt, der an Stelle der Beläge 13, 14 nach Fig. 1 mit zwei leitenden Geflechten 21 und 22 versehen ist. Die leitenden Geflechte sind beispielsweise auf den Stab 20 aufgeschoben.In Fig. 3, a cylindrical rod 20 is shown, which is provided in place of the pads 13, 14 of FIG. 1 with two conductive braids 21 and 22. The conductive braids are pushed onto the rod 20, for example.

Die leitenden Beläge 13, 14 nach Fig. 1 können auch durch je eine leitende Folie oder je ein dünnwandiges Rohrteil 25, 26 (Fig. 4) gebildet sein. Die Folien und die Rohrteile bestehen vorzugsweise aus Kupfer und können bei der Herstellung des Strahlers in den Stab 27 miteingespritzt werden, so daß die Folien bzw. Rohrteile nicht über die Mantelfläche des Stabes 27 hinausragen.1 can also be formed by a conductive film or a thin-walled tubular part 25, 26 (FIG. 4). The foils and the tube parts are preferably made of copper and can be injected into the rod 27 during the manufacture of the radiator, so that the foils or tube parts do not protrude beyond the outer surface of the rod 27.

Die in den Fig. 1 bis 4 gezeigten Strahler werden beispielsweise mit einem isolierenden Schlauch, das ist vorzugsweise ein Schrumpfschlauch, überzogen; vgl. den in Fig. 4 verkürzt dargestellten Schlauch 28.The radiators shown in FIGS. 1 to 4 are covered, for example, with an insulating tube, which is preferably a shrink tube; see. the hose 28 shown shortened in FIG. 4.

Claims (7)

  1. Bar-shaped radiator for at least two frequency ranges, having a bar which has a length of approximately 3/2 λ and which comprises dielectric material and which includes a coaxial inner conductor extending over the entire length of the bar and which is surrounded, in its central region having a length of approximately λ/2, by a conductive covering, where λ is the mean operating wavelength of the higher frequency range, characterized in that the bar (11) carries, beneath the conductive covering (14), a further conductive covering (13) also having a length of approximately λ/2, in that the coverings (13, 14) exhibit a spacing (a) from one another, and in that the lower end of the inner conductor (12) is conductively connected to the lower end of the further covering (13).
  2. Bar-shaped radiator according to Claim 1, characterized in that the conductive coverings (13, 14) comprise a conductive lacquer.
  3. Bar-shaped radiator according to Claim 1, characterized in that the conductive coverings are electrically conductive meshes (21, 22).
  4. Bar-shaped radiator according to Claim 1, characterized in that the conductive coverings are conductive foils or thin-walled tubular parts (25, 26).
  5. Bar-shaped radiator according to one of Claims 1 to 4, characterized in that the inner conductor (12) of the bar (11) is led out at its lower end and conductively connected to the further covering (13).
  6. Bar-shaped radiator according to Claim 5, characterized in that the lower end of the bar (11) is secured in a recess (15) of a bolt (16).
  7. Bar-shaped radiator according to one of Claims 1 to 5, characterized in that the bar (11) including the conductive coverings (13, 14) is covered over with a tube (28) of insulating material.
EP90117741A 1990-02-21 1990-09-14 Rod antenna for at least two frequency ranges Expired - Lifetime EP0443088B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9002022U DE9002022U1 (en) 1990-02-21 1990-02-21
DE9002022U 1990-02-21

Publications (3)

Publication Number Publication Date
EP0443088A2 EP0443088A2 (en) 1991-08-28
EP0443088A3 EP0443088A3 (en) 1991-09-11
EP0443088B1 true EP0443088B1 (en) 1994-12-07

Family

ID=6851223

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90117741A Expired - Lifetime EP0443088B1 (en) 1990-02-21 1990-09-14 Rod antenna for at least two frequency ranges

Country Status (3)

Country Link
EP (1) EP0443088B1 (en)
DE (2) DE9002022U1 (en)
DK (1) DK0443088T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2702598B1 (en) * 1993-03-12 1995-06-16 Rayan LOW PROFILE ANTENNA FOR MULTI FREQUENCY ONBOARD RADIO EQUIPMENT.
EP1088366B1 (en) * 1998-06-17 2006-09-20 Young Joon Kim Antenna for mobile communications
FI112981B (en) 1999-07-08 2004-02-13 Filtronic Lk Oy More frequency antenna

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2493514A (en) * 1945-12-22 1950-01-03 Rca Corp Multiply-resonant stub antenna
US4509056A (en) * 1982-11-24 1985-04-02 George Ploussios Multi-frequency antenna employing tuned sleeve chokes
US4748450A (en) * 1986-07-03 1988-05-31 American Telephone And Telegraph Company, At&T Bell Laboratories Vehicular multiband antenna feedline coupling device
US4725846A (en) * 1986-12-12 1988-02-16 Western Mobile Communications, Inc. Disguise antenna operating in the cellular band
DE8908175U1 (en) * 1989-06-19 1989-08-31 Robert Bosch Gmbh, 7000 Stuttgart, De
DE8909175U1 (en) * 1989-07-28 1989-09-14 Klever, Hans, 5207 Ruppichteroth, De

Also Published As

Publication number Publication date
DK0443088T3 (en) 1995-05-01
EP0443088A2 (en) 1991-08-28
EP0443088A3 (en) 1991-09-11
DE59007938D1 (en) 1995-01-19
DE9002022U1 (en) 1990-04-26

Similar Documents

Publication Publication Date Title
DE69838424T2 (en) ANTENNA FOR MOUNTING ON A VEHICLE, ANTENNA ELEMENT AND MANUFACTURING METHOD THEREFOR
DE2911885C2 (en)
DE4318869C2 (en) Radio antenna arrangement on the window pane of a motor vehicle and method for determining its wiring
DE3612534A1 (en) BROADBAND ANTENNA
DE2642013A1 (en) ANTENNA ARRANGEMENT
DE3023055A1 (en) ANTENNA
EP0374371B1 (en) Rod antenna for t.v. reception
WO2003071630A1 (en) Antenna for a receiver and/or transmitter, especially a roof antenna for motor vehicles
DE69824466T2 (en) Window glass antenna system
DE60105447T2 (en) PRINTED PATCH ANTENNA
DE833064C (en) Transmitting or receiving antenna for a large frequency range
EP1454381B1 (en) Wide band slot cavity antenna
EP0443088B1 (en) Rod antenna for at least two frequency ranges
DE3046255A1 (en) BROADBAND AERIAL SMALL DIMENSIONS FOR THE RADIO FREQUENCY BAND
DE3824417A1 (en) VEHICLE DISC ANTENNA
DE2262522A1 (en) RADIO TRAFFIC ANTENNA OF SMALL DIMENSIONS
EP0406564B1 (en) Rod antenna for two frequency ranges
DE7623497U1 (en) Antenna assigned to a pane for several wave ranges
DE4141783B4 (en) Motor vehicle antenna for several separate frequency ranges
DE3410950A1 (en) Antenna arrangement, especially for motor vehicles
DE3919884C2 (en) Rod-shaped radio antenna
DE102006039645B4 (en) Antenna with adjustable resonance frequency
EP3231036B1 (en) Bendable monopole antenna for use in mobile environments
DE4230518A1 (en) Rod-shaped antenna, which is pivotally and detachably connected to a base
DE3738226C2 (en) Vehicle window antenna

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): CH DE DK FR GB IT LI SE

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): CH DE DK FR GB IT LI SE

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ROBERT BOSCH GMBH

17P Request for examination filed

Effective date: 19920219

17Q First examination report despatched

Effective date: 19940225

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE DK FR GB IT LI SE

REF Corresponds to:

Ref document number: 59007938

Country of ref document: DE

Date of ref document: 19950119

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19950210

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19950930

Ref country code: CH

Effective date: 19950930

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20030826

Year of fee payment: 14

Ref country code: DK

Payment date: 20030826

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20030917

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040914

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040915

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040930

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20040914

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20091120

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20090924

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20091005

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20100914