EP0505673B1 - Multiband rod antenna - Google Patents

Multiband rod antenna Download PDF

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Publication number
EP0505673B1
EP0505673B1 EP92100327A EP92100327A EP0505673B1 EP 0505673 B1 EP0505673 B1 EP 0505673B1 EP 92100327 A EP92100327 A EP 92100327A EP 92100327 A EP92100327 A EP 92100327A EP 0505673 B1 EP0505673 B1 EP 0505673B1
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EP
European Patent Office
Prior art keywords
coil
wire
rod
multiband antenna
antenna according
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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
EP92100327A
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German (de)
French (fr)
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EP0505673A1 (en
Inventor
Horst Dörrie
Uwe Militz
Heinrich Dipl.-Ing. Wilken
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • 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
    • 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
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/321—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors within a radiating element or between connected radiating elements

Definitions

  • the invention is based on a rod-shaped multi-area radiator according to the preamble of claim 1.
  • Such a multi-range radiator is known (US-A-4 145 693) which is suitable for three different frequency bands within 3 to 30 MHz.
  • the frequency bands must be in a ratio of 1: 2: 4, starting from the lowest frequency band.
  • Average operating frequencies of 3.5 MHz, 7 MHz and 14 MHz are mentioned as an example.
  • document US-A-4 675 687 discloses a multi-range rod-shaped radiator which operates in the AM, FM and telephone (i.e. around 835 MHz) frequency ranges.
  • the invention has for its object to develop the known multi-range radiator such that it is broadband and can be used for four different frequency bands, namely preferably for a first, highest frequency band of, for example, 825 to 960 MHz (AMPS network or D network the German Bundespost), for a second, second highest frequency band of, for example, 450 to 470 MHz (C network of the Deutsche Bundespost), for a third, second lowest frequency band of, for example, 75 to 115 MHz (FM radio range) and a fourth, lowest Frequency band from, for example, 150 kHz to about 6 MHz (AM radio range).
  • AMPS network or D network the German Bundespost for a second, second highest frequency band of, for example, 450 to 470 MHz
  • C network of the Deutsche Bundespost for a third, second lowest frequency band of, for example, 75 to 115 MHz (FM radio range)
  • FM radio range for example, 75 to 115 MHz
  • AM radio range a fourth, lowest Frequency band from, for example, 150 kHz
  • the multi-range radiator according to the invention has the advantage that a broadband multi-range antenna for four frequency ranges can be realized with little technical effort. Without the use of a discrete capacitor, the first coil forms a parallel resonance circuit which de-energizes part of the radiator and thus causes different frequency bands to be separated.
  • the rod-shaped multi-range radiator according to the invention is particularly suitable as a vehicle antenna to which a car radio for the AM and FM range and a radio telephone which can be switched over to two different systems are connected.
  • the figure shows a view of a rod-shaped multi-area radiator 10 with an insulating rod 11, which, seen from the base point 12 or from a reference plane 13 lying at ground potential, a first, straight wire section 14, a first coil 15 connected to it, a second one connected to it Wire section 16, a second coil 17 connected thereto and an adjoining third, straight wire section 18 carries.
  • the straight wire sections 14, 16, 18 lie on a common axis parallel to the longitudinal symmetry axis of the insulating material rod 11 on the outside of the rod.
  • the wire sections 14, 16, 18 and the coils 15, 17 preferably consist of a single piece of wire 20 which is fastened, for example by an adhesive connection, to the insulating rod 11.
  • the complete piece of wire 20 can preferably be prefabricated, dipped in an adhesive and placed on the insulating rod. After the adhesive has hardened, the wire piece 20 is firmly seated on the insulating rod, which is preferably a glass fiber rod.
  • the piece of wire 20 is dimensioned as follows, for example.
  • the length l1 of the first, straight wire section 14 is ⁇ 1 4th , where ⁇ 1 is the average operating wavelength of the highest frequency band, for example 825 to 960 MHz.
  • the first coil 15 is dimensioned such that its inductive and capacitive component forms a parallel circuit or a blocking circuit which is tuned to the average operating wavelength ⁇ 1.
  • the second coil 17 is used for phase rotation. At the average operating wavelength ⁇ 2, it produces a phase shift of, for example, 135 °.
  • the second coil 17 has a plurality of turns wound at a distance.
  • the piece of wire preferably consists of enamelled copper wire.
  • the rod-shaped multi-area radiator 10 shown in the figure is surrounded by an insulating material layer which has been omitted in the figure for the sake of clarity, for example an insulating material shrink tube or a thin insulating material layer produced by dipping.
  • an insulating material layer which has been omitted in the figure for the sake of clarity, for example an insulating material shrink tube or a thin insulating material layer produced by dipping.
  • the first wire section 14 forms one ⁇ 1 4th Emitter for the highest frequency band.
  • the ⁇ 3 4th -Active effect that is tuned to the FM range and has satisfactory properties even in the lowest frequency band, for example the AM frequency band.

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  • Details Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Description

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

Es ist ein derartiger Mehrbereichsstrahler bekannt (US-A-4 145 693), der für drei verschiedene Frequenzbänder innerhalb von 3 bis 30 MHz geeignet ist. Die Frequenzbänder müssen dabei in einem Verhältnis von 1 : 2 : 4, ausgehend von dem niedrigsten Frequenzband, stehen. Als Beispiel sind mittlere Betriebsfrequenzen von 3,5 MHz, 7 MHz und 14 MHz genannt.Such a multi-range radiator is known (US-A-4 145 693) which is suitable for three different frequency bands within 3 to 30 MHz. The frequency bands must be in a ratio of 1: 2: 4, starting from the lowest frequency band. Average operating frequencies of 3.5 MHz, 7 MHz and 14 MHz are mentioned as an example.

Weiterhin offenbart Dokument US-A-4 675 687 einen stabförmigen Mehrbereichstrahler, der in den AM, FM- und Telefon- (d.h. um 835 MHz) Frequenzbereichen Funktioniert.Furthermore, document US-A-4 675 687 discloses a multi-range rod-shaped radiator which operates in the AM, FM and telephone (i.e. around 835 MHz) frequency ranges.

Der Erfindung liegt die Aufgabe zugrunde, den bekannten Mehrbereichsstrahler derart weiterzubilden, daß er breitbandig ist und für vier verschiedene Frequenzbänder eingesetzt werden kann, nämlich vorzugsweise für ein erstes, höchstes Frequenzband von zum Beispiel 825 bis 960 MHz (AMPS-Netz bzw. D-Netz der Deutschen Bundespost), für ein zweites, zweithöchstes Frequenzband von zum Beispiel 450 bis 470 MHz (C-Netz der Deutschen Bundespost), für ein drittes, zweitniedrigstes Frequenzband von zum Beispiel 75 bis 115 MHz (FM-Rundfunkbereich) und ein viertes, niedrigstes Frequenzband von zum Beispiel 150 kHz bis etwa 6 MHz (AM-Rundfunkbereich).The invention has for its object to develop the known multi-range radiator such that it is broadband and can be used for four different frequency bands, namely preferably for a first, highest frequency band of, for example, 825 to 960 MHz (AMPS network or D network the German Bundespost), for a second, second highest frequency band of, for example, 450 to 470 MHz (C network of the Deutsche Bundespost), for a third, second lowest frequency band of, for example, 75 to 115 MHz (FM radio range) and a fourth, lowest Frequency band from, for example, 150 kHz to about 6 MHz (AM radio range).

Diese Aufgabe wird bei einem stabförmigen Mehrbereichsstrahler durch die Merkmale des Anspruchs 1 gelöst. Der erfindungsgemäße Mehrbereichsstrahler hat den Vorteil, daß bei geringem technischen Aufwand eine breitbandige Mehrbereichsantenne für vier Frequenzbereiche realisiert werden kann. Die erste Spule bildet ohne die Verwendung eines diskreten Kondensators einen Parallelresonanzkreis, der einen Teil des Strahlers stromlos macht und somit eine Trennung verschiedener Frequenzbänder bewirkt.This object is achieved in the case of a rod-shaped multi-area radiator by the features of claim 1. The multi-range radiator according to the invention has the advantage that a broadband multi-range antenna for four frequency ranges can be realized with little technical effort. Without the use of a discrete capacitor, the first coil forms a parallel resonance circuit which de-energizes part of the radiator and thus causes different frequency bands to be separated.

Der erfindungsgemäße stabförmige Mehrbereichsstrahler eignet sich besonders als Fahrzeugantenne, an die ein Autoradio für den AM- und FM-Bereich sowie ein auf zwei verschiedene Systeme umschaltbares Funktelefon angeschlossen sind.The rod-shaped multi-range radiator according to the invention is particularly suitable as a vehicle antenna to which a car radio for the AM and FM range and a radio telephone which can be switched over to two different systems are connected.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung an Hand einer einzigen Figur dargestellt und wird im folgenden näher beschrieben.An embodiment of the invention is shown in the drawing using a single figure and is described in more detail below.

Die Figur zeigt eine Ansicht eines stabförmigen Mehrbereichsstrahlers 10 mit einem Isolierstoffstab 11, der vom Fußpunkt 12 bzw. von einer auf dem Massepotential liegenden Bezugsebene 13 aus gesehen einen ersten, geraden Drahtabschnitt 14, eine damit verbundene erste Spule 15, einen damit verbundenen zweiten, geraden Drahtabschnitt 16, eine damit verbundene zweite Spule 17 und einen sich daran anschließenden dritten, geraden Drahtabschnitt 18 trägt. Die geraden Drahtabschnitte 14, 16, 18 liegen auf einer gemeinsamen zu der Längssymmetrieachse des Isolierstoffstabes 11 parallelen Achse an der Außenseite des Stabes. Die Drahtabschnitte 14, 16, 18 und die Spulen 15, 17 bestehen vorzugsweise aus einem einzigen Drahtstück 20, das zum Beispiel durch eine Klebverbindung auf dem Isolierstoffstab 11 befestigt ist. Vorzugsweise kann das komplette Drahtstück 20 vorgefertigt, in einen Klebstoff getaucht und auf den Isolierstoffstab aufgesteckt werden. Nach dem Aushärten des Klebstoffs sitzt das Drahtstück 20 fest auf dem Isolierstoffstab, das ist vorzugsweise ein Glasfaserstab.The figure shows a view of a rod-shaped multi-area radiator 10 with an insulating rod 11, which, seen from the base point 12 or from a reference plane 13 lying at ground potential, a first, straight wire section 14, a first coil 15 connected to it, a second one connected to it Wire section 16, a second coil 17 connected thereto and an adjoining third, straight wire section 18 carries. The straight wire sections 14, 16, 18 lie on a common axis parallel to the longitudinal symmetry axis of the insulating material rod 11 on the outside of the rod. The wire sections 14, 16, 18 and the coils 15, 17 preferably consist of a single piece of wire 20 which is fastened, for example by an adhesive connection, to the insulating rod 11. The complete piece of wire 20 can preferably be prefabricated, dipped in an adhesive and placed on the insulating rod. After the adhesive has hardened, the wire piece 20 is firmly seated on the insulating rod, which is preferably a glass fiber rod.

Das Drahtstück 20 ist zum Beispiel folgendermaßen dimensioniert. Die Länge l1 des ersten, geraden Drahtabschnitts 14 beträgt λ1  4

Figure imgb0001
, wobei λ1 die mittlere Betriebswellenlänge des höchsten Frequenzbandes von zum Beispiel 825 bis 960 MHz ist. Die erste Spule 15 ist so bemessen, daß ihre induktive und kapazitive Komponente einen Parallelstromkreis bzw. einen Sperrkreis bildet, der auf die mittlere Betriebswellenlänge λ1 abgestimmt ist. Der erste, gerade Drahtabschnitt 14 und ein zweiter, gerader Drahtabschnitt 16 haben zusammen mit der dazwischen liegenden Spule 15 eine Länge l2 = λ2  4 ,
Figure imgb0002
 wobei λ2 die mittlere Betriebswellenlänge des zweithöchsten Frequenzbandes von zum Beispiel 450 bis 470 MHz ist.The piece of wire 20 is dimensioned as follows, for example. The length l1 of the first, straight wire section 14 is λ1 4th
Figure imgb0001
 , where λ1 is the average operating wavelength of the highest frequency band, for example 825 to 960 MHz. The first coil 15 is dimensioned such that its inductive and capacitive component forms a parallel circuit or a blocking circuit which is tuned to the average operating wavelength λ1. The first, straight wire section 14 and a second, straight wire section 16 together with the coil 15 lying therebetween have a length l2 = λ2 4th ,
Figure imgb0002
 where λ2 is the average operating wavelength of the second highest frequency band, for example 450 to 470 MHz.

Die zweite Spule 17 dient zur Phasendrehung. Sie erzeugt bei der mittleren Betriebswellenlänge λ2 eine Phasendrehung von zum Beispiel 135°.The second coil 17 is used for phase rotation. At the average operating wavelength λ2, it produces a phase shift of, for example, 135 °.

Während die erste Spule 15 mehrere eng aneinanderliegende Windungen hat, weist die zweite Spule 17 mehrere, auf Abstand gewickelte Windungen auf.While the first coil 15 has a plurality of turns lying close to one another, the second coil 17 has a plurality of turns wound at a distance.

Der dritte, gerade Drahtabschnitt 18 hat eine Länge l3 = 5/8 λ2, und das gesamte Drahtstück 20 hat eine Länge l4 = λ3  4

Figure imgb0003
, wobei λ3 die mittlere Betriebswellenlänge des zweitniedrigsten Frequenzbereiches von zum Beispiel 75 bis 115 MHz ist. Das Drahtstück besteht vorzugsweise aus Kupferlackdraht.The third straight wire section 18 has a length l3 = 5/8 λ2, and the entire piece of wire 20 has a length l4 = λ3 4th
Figure imgb0003
 , where λ3 is the average operating wavelength of the second lowest frequency range from, for example, 75 to 115 MHz. The piece of wire preferably consists of enamelled copper wire.

Der in der Figur gezeigte stabförmige Mehrbereichsstrahler 10 ist von einer in der Figur der Übersichtlichkeit halber weggelassenen Isolierstoffschicht umgeben, das ist zum Beispiel ein Isolierstoff-Schrumpfschlauch oder eine durch Tauchen erzeugte dünne Isolierstoffschicht.The rod-shaped multi-area radiator 10 shown in the figure is surrounded by an insulating material layer which has been omitted in the figure for the sake of clarity, for example an insulating material shrink tube or a thin insulating material layer produced by dipping.

Die Wirkungsweise des vorstehend beschriebenen stabförmigen Strahlers ist folgende.The operation of the rod-shaped radiator described above is as follows.

Der erste Drahtabschnitt 14 bildet einen λ1  4

Figure imgb0004
-Strahler für das höchste Frequenzband. Im zweithöchsten Frequenzband kommt ein gestockter λ2  4
Figure imgb0005
- + 5/8-λ2-Strahler mit der Phasendrehspule 17 zur Wirkung. Für den zweitniedrigsten und niedrigsten Frequenzbereich kommt der λ3  4
Figure imgb0006
-Strahler zur Wirkung, der auf den UKW-Bereich abgestimmt ist und auch im niedrigsten Frequenzband, zum Beispiel dem AM-Frequenzband, zufriedenstellende Eigenschaften aufweist.The first wire section 14 forms one λ1 4th
Figure imgb0004
 Emitter for the highest frequency band. In the second highest frequency band comes a bushhammer λ2 4th
Figure imgb0005
 - + 5/8-λ2 radiator with the phase moving coil 17 to effect. For the second lowest and lowest frequency range comes the λ3 4th
Figure imgb0006
 -Active effect that is tuned to the FM range and has satisfactory properties even in the lowest frequency band, for example the AM frequency band.

Claims (9)

  1. Multiband rod antenna having a rod of insulating material as a carrier for a wire extending over the entire length of the rod, having a first, straight wire section (14), which connects the base (12) of the multi-band antenna (10) to one end of a first coil (15), a second, straight wire section (16), which connects the other end of the first coil to one end of a second coil (17), and a third, straight wire section (18), which leads from the other end of the second coil up to the free end of the multiband antenna (10), characterized in that the wire sections (14, 16, 18) extend coaxially with respect to one another and axially parallel to the longitudinal axis of symmetry of the rod of insulating material (11), the first wire section (14) having a length l1 = λ1  4
    Figure imgb0010
     , the second wire section (16) together with the first wire section (14) and the first coil (15) having a length l2 = λ2  4
    Figure imgb0011
     , the third wire section (18) having a length l3 = 5/8 λ2, and the entire multiband antenna having an electrical length l4 = λ3  4
    Figure imgb0012
     , λ3 being the average operating wavelength of the second-lowest frequency band, the first coil (15) forming a parallel resonant circuit tuned to the average operating wavelength λ1 of the highest frequency band and the second coil (17) being a phase-shifting coil tuned to the average operating wavelength λ2 of the second-highest frequency band.
  2. Multiband antenna according to Claim 1, characterized in that the three straight wire sections (14, 16, 18) and the two coils (15, 17) are an uninterrupted piece of wire (20).
  3. Multiband antenna according to Claim 1 or 2, characterized in that the piece of wire (20) comprises an enamelled copper wire.
  4. Multiband antenna according to Claim 1, characterized in that the rod of insulating material (11) is a glass fibre rod.
  5. Multiband antenna according to one of Claims 1 to 4, characterized in that at least the wire sections (14, 16, 18) are bonded to the rod of insulating material (11).
  6. Multiband antenna according to one of Claims 1 to 5, characterized in that the rod of insulating material (11) and the piece of wire (20) are surrounded by a common layer of insulating material.
  7. Multiband antenna according to one of Claims 1 to 6, characterized in that the multiband antenna (10) is a vehicle aerial.
  8. Multiband antenna according to one of Claims 1, 2, 3 or 6, characterized in that the first coil (15) is an air-core coil comprising a plurality of directly adjacent turns.
  9. Multiband antenna according to one of Claims 1, 2, 3 or 6, characterized in that the second coil (17) is an air-core coil comprising a plurality of turns which are wound spaced apart.
EP92100327A 1991-03-23 1992-01-10 Multiband rod antenna Expired - Lifetime EP0505673B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4109630A DE4109630A1 (en) 1991-03-23 1991-03-23 ROD-SHAPED MULTI-RANGE EMITTER
DE4109630 1991-03-23

Publications (2)

Publication Number Publication Date
EP0505673A1 EP0505673A1 (en) 1992-09-30
EP0505673B1 true EP0505673B1 (en) 1995-10-04

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EP92100327A Expired - Lifetime EP0505673B1 (en) 1991-03-23 1992-01-10 Multiband rod antenna

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US (1) US5258765A (en)
EP (1) EP0505673B1 (en)
JP (1) JP3188509B2 (en)
CZ (1) CZ281157B6 (en)
DE (2) DE4109630A1 (en)
DK (1) DK0505673T3 (en)
ES (1) ES2079084T3 (en)
HU (1) HU210506B (en)

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Publication number Publication date
EP0505673A1 (en) 1992-09-30
DE4109630A1 (en) 1992-09-24
HU9200938D0 (en) 1992-05-28
HUT63272A (en) 1993-07-28
CZ281157B6 (en) 1996-07-17
JPH0575330A (en) 1993-03-26
DK0505673T3 (en) 1995-12-27
ES2079084T3 (en) 1996-01-01
JP3188509B2 (en) 2001-07-16
HU210506B (en) 1995-04-28
CS74692A3 (en) 1992-10-14
DE59203865D1 (en) 1995-11-09
US5258765A (en) 1993-11-02

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