EP0403741A2 - Whip antenna - Google Patents

Whip antenna Download PDF

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Publication number
EP0403741A2
EP0403741A2 EP19900105964 EP90105964A EP0403741A2 EP 0403741 A2 EP0403741 A2 EP 0403741A2 EP 19900105964 EP19900105964 EP 19900105964 EP 90105964 A EP90105964 A EP 90105964A EP 0403741 A2 EP0403741 A2 EP 0403741A2
Authority
EP
European Patent Office
Prior art keywords
coil
rod
radio antenna
shaped radio
antenna according
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.)
Granted
Application number
EP19900105964
Other languages
German (de)
French (fr)
Other versions
EP0403741B1 (en
EP0403741A3 (en
Inventor
Horst Dörrie
Uwe Dipl.-Ing. Militz
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 EP0403741A2 publication Critical patent/EP0403741A2/en
Publication of EP0403741A3 publication Critical patent/EP0403741A3/en
Application granted granted Critical
Publication of EP0403741B1 publication Critical patent/EP0403741B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/32—Vertical arrangement of element

Definitions

  • the invention is based on a rod-shaped radio antenna according to the preamble of claim 1.
  • Such a rod-shaped radio antenna is known, which, however, has the disadvantage, in the case of mounting deviating from the vertical, that its all-round characteristic is no longer circular, but that it has strong drops of up to 30 dB.
  • the invention has for its object to develop a rod-shaped radio antenna according to the preamble of claim 1 in such a way that a gain antenna is formed which also has a circular antenna characteristic that is as uniform as possible even at an inclination angle of up to 40 ° with respect to the vertical.
  • a preferred area of application for the invention is a radio antenna for the radio network C of the Irish Bundespost, that is to say for a frequency range from 450 to 470 MHz.
  • 10 means a rod-shaped radio antenna with a flexible, electrically conductive spring element 11, which is preferably a plated-through coil spring.
  • the spring element is connected at one end to an elastic rod 12 made of dielectric material.
  • the elastic rod 12 carries a first coil SP1, which is electrically connected to the flexible spring element 11.
  • a first length L1 of the radio antenna 10 comprises the flexible spring element 11 and the first coil SP1.
  • the second coil SP2 is followed by a third coil SP3 within the second length L2, which is wound in the opposite manner to the second coil SP2 and is wound back and has a third length L3.
  • a fourth coil SP4 is connected to the third coil SP3, which is wound parallel to the second coil SP2 and in the same direction as this and also has a length L3.
  • the coils SP2 to SP4 are preferably wound from an uninterrupted piece of wire.
  • radiator part 13 which, for example, consists of a braid pushed onto the rod 12 and has a length L4.
  • the average operating wavelength of the radio range in question is designated by ⁇ .
  • a conductive lacquer layer or a tubular film preferably a copper film, can optionally be used.
  • FIG. 3 shows the arrangement of the rod-shaped radio antenna 10 on a roof 14, for example for a motor vehicle body.
  • the radio antenna 10 is preferably detachably connected in a foot piece 15 firmly connected to the roof.
  • the angle ⁇ of the radio antenna 10 with respect to the vertical is preferably 0 to 40 °.

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  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)

Abstract

The invention is based on the object of developing a known rod- shaped radio antenna, which does not have an approximately circular omnidirectional characteristic when arranged obliquely, such that the antenna operates as an antenna with gain, with a largely circular characteristic, at an inclination angle deviating from the vertical by up to 40 DEG . <??>This object is achieved by an elastic rod (12) of dielectric material being fixedly connected to a spring element (11) and carrying a plurality of coils (SP1 ... SP4) and a radiating part (13). Together with the spring part (11), a first coil (SP1) which is electrically connected to the said spring part (11) has a first length L1 = lambda /4. A second coil (SP2), connected to the first coil (SP1), has a length L2 = lambda /4. A third coil (SP3) is wound running backwards from the end of the second coil (SP2) and has a length L3 = lambda /8. A fourth coil (SP4) is wound from the end of the third coil (SP3) parallel to the second coil (SP2). A radiating part (13), having a length L4 = 3/8 lambda , is connected to the fourth coil (SP4). In this case, lambda is the mean operating wavelength of the relevant radio band. <??>A preferred area of application for the rod-shaped radio antenna is the Radio Network C of the German Federal Post Office. <??>The drawing shows a winding layout for the rod-shaped radio antenna. <IMAGE>

Description

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

Stand der TechnikState of the art

Es ist eine derartige stabförmige Funkantenne bekannt, die jedoch bei von der Vertikalen abweichender Montage den Nachteil aufweist, daß ihre Rundum-Charakteristik nicht mehr kreisförmig ist, sondern daß sie starke Einbrüche bis zu 30 dB aufweist.Such a rod-shaped radio antenna is known, which, however, has the disadvantage, in the case of mounting deviating from the vertical, that its all-round characteristic is no longer circular, but that it has strong drops of up to 30 dB.

Aufgabetask

Der Erfindung liegt die Aufgabe zugrunde, eine stabförmige Funkantenne gemäß dem Oberbegriff des Anspruchs 1 derart weiterzubilden, daß eine Gewinnantenne entsteht, die auch noch bei einem Neigungswinkel von bis zu 40° gegenüber der Vertikalen eine möglichst gleichmäßige kreisför­mige Antennen-Charakteristik aufweist.The invention has for its object to develop a rod-shaped radio antenna according to the preamble of claim 1 in such a way that a gain antenna is formed which also has a circular antenna characteristic that is as uniform as possible even at an inclination angle of up to 40 ° with respect to the vertical.

Lösungsolution

Diese Aufgabe wird bei einer stabförmigen Funkantenne gemäß dem Oberbe­griff des Anspruchs 1 durch die im kennzeichnenden Teil dieses Anspruchs angegebenen Merkmale gelöst. Die mit der Erfindung erzielbaren Vorteile bestehen insbesondere darin, daß die stabförmige Funkantenne bei einem Einbau unter etwa 40° gegenüber der Vertikalen eine optimale Kreis-­Charakteristik aufweist.This object is achieved in a rod-shaped radio antenna according to the preamble of claim 1 by the features specified in the characterizing part of this claim. The advantages that can be achieved with the invention are, in particular, that the rod-shaped radio antenna has an optimal circular characteristic when installed at approximately 40 ° relative to the vertical.

Ein bevorzugtes Anwendungsgebiet für die Erfindung ist eine Funkantenne für das Funknetz C der Deutschen Bundespost, das heißt für einen Fre­quenzbereich von 450 bis 470 MHz.A preferred area of application for the invention is a radio antenna for the radio network C of the Deutsche Bundespost, that is to say for a frequency range from 450 to 470 MHz.

Beschreibungdescription

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung an Hand von drei Figuren dargestellt. Es zeigen

  • Fig. 1 eine Ansicht einer stabförmigen Funkantenne in vergrößertem Maßstab,
  • Fig. 2 ein Wicklungsschema für die Funkantenne nach Fig. 1 und
  • Fig. 3 eine Ansicht einer kompletten Dachantenne.
An embodiment of the invention is shown in the drawing using three figures. Show it
  • 1 is a view of a rod-shaped radio antenna on an enlarged scale,
  • Fig. 2 is a winding diagram for the radio antenna according to Fig. 1 and
  • Fig. 3 is a view of a complete roof antenna.

In Fig. 1 bedeutet 10 eine stabförmige Funkantenne mit einem biegsamen, elektrisch leitenden Federelement 11, das ist vorzugsweise eine durch­kontaktierte Wendelfeder. Das Federelement ist mit seinem einen Ende mit einem elastischen Stab 12 aus dielektrischem Material verbunden. Der elastische Stab 12 trägt eine erste, mit dem biegsamen Federelement 11 elektrisch verbundene Spule SP1. Eine erste Länge L1 der Funkantenne 10 umfaßt das biegsame Federelement 11 und die erste Spule SP1. Auf einer zweiten, sich an die erste Länge L1 anschließenden Länge L2 des Stabes 12 sitzen mehrere Spulen (vgl. Fig. 1 und 2), und zwar eine zweite Spule SP2, die elektrisch mit der ersten Spule SP1 verbunden ist und die sich über die gesamte Länge L2 erstreckt. An die zweite Spule SP2 schließt sich innerhalb der zweiten Länge L2 eine dritte Spule SP3 an, die ent­gegengesetzt wie die zweite Spule SP2 und rücklaufend gewickelt ist und die eine dritte Länge L3 hat. Mit der dritten Spule SP3 ist eine vierte Spule SP4 verbunden, die parallel zu der zweiten Spule SP2 und in glei­cher Richtung wie diese gewickelt ist und ebenfalls eine Länge L3 hat. Die Spulen SP2 bis SP4 sind vorzugsweise aus einem ununterbrochenen Drahtstück gewickelt.In Fig. 1, 10 means a rod-shaped radio antenna with a flexible, electrically conductive spring element 11, which is preferably a plated-through coil spring. The spring element is connected at one end to an elastic rod 12 made of dielectric material. The elastic rod 12 carries a first coil SP1, which is electrically connected to the flexible spring element 11. A first length L1 of the radio antenna 10 comprises the flexible spring element 11 and the first coil SP1. On a second length L2 of the rod 12 adjoining the first length L1, there are several coils (see FIGS. 1 and 2), specifically a second coil SP2, which is electrically connected to the first coil SP1 and which extends over the extends entire length L2. The second coil SP2 is followed by a third coil SP3 within the second length L2, which is wound in the opposite manner to the second coil SP2 and is wound back and has a third length L3. A fourth coil SP4 is connected to the third coil SP3, which is wound parallel to the second coil SP2 and in the same direction as this and also has a length L3. The coils SP2 to SP4 are preferably wound from an uninterrupted piece of wire.

An das freie Ende der vierten Spule SP4 schließt sich ein Strahlerteil 13 an, der beispielsweise aus einem auf den Stab 12 geschobenen Geflecht besteht und eine Länge L4 hat.At the free end of the fourth coil SP4 there is a radiator part 13 which, for example, consists of a braid pushed onto the rod 12 and has a length L4.

Die Längen L1 bis L4 betragen vorzugsweise L1 = λ/4, L2 = λ/4, L3 = λ/8 und L4 = 3/8 λ, so daß sich eine Gesamtlänge der stabförmigen Funk­antenne 10 von 7/8 λ ergibt. Mit λ ist die mittlere Betriebswellenlänge des betreffenden Funkbereiches bezeichnet.The lengths L1 to L4 are preferably L1 = λ / 4, L2 = λ / 4, L3 = λ / 8 and L4 = 3/8 λ, so that the overall length of the rod-shaped radio antenna 10 is 7/8 λ. The average operating wavelength of the radio range in question is designated by λ.

An die Stelle des als Strahlerteil 13 verwendeten Geflechtes kann gege­benenfalls auch eine leitende Lackschicht oder eine rohrförmige Folie, vorzugsweise eine Kupferfolie, treten.In place of the braid used as the radiator part 13, a conductive lacquer layer or a tubular film, preferably a copper film, can optionally be used.

In Fig. 3 ist die Anordnung der stabförmigen Funkantenne 10 auf einem Dach 14 zum Beipiel einer Kraftfahrzeugkarosserie gezeigt. Die Funk­antenne 10 ist in einem mit dem Dach fest verbundenen Fußstück 15 vor­zugsweise lösbar verbunden. Der Winkel α der Funkantenne 10 gegenüber der Vertikalen beträgt vorzugsweise 0 bis 40°.FIG. 3 shows the arrangement of the rod-shaped radio antenna 10 on a roof 14, for example for a motor vehicle body. The radio antenna 10 is preferably detachably connected in a foot piece 15 firmly connected to the roof. The angle α of the radio antenna 10 with respect to the vertical is preferably 0 to 40 °.

Claims (8)

1. Stabförmige Funkantenne aus einem biegsamen, elektrisch leitenden Federelement und einem damit verbundenen elastischen Stab aus dielek­trischem Material, der elektrisch miteinander verbundene Spulen trägt, dadurch gekennzeichnet, daß das biegsame Federelement (11) und eine elektrisch damit verbundene erste Spule (SP1) zusammen eine Länge von L1 = λ/4 aufweisen, daß eine mit der ersten Spule verbundene, λ/4 lange zweite Spule (SP2) mit einer λ/8 langen dritten Spule (SP3) ver­bunden ist, die entgegengesetzt wie die zweite Spule (SP2) und rück­laufend gewickelt ist, daß die dritte Spule (SP3) mit einer ebenfalls λ/8 langen vierten Spule (SP4) verbunden ist, die parallel zur zweiten Spule gewickelt ist, und daß sich an die vierte Spule (SP4) ein 3/8 λ langer Strahlerteil (13) anschließt, wobei λ die mittlere Betriebs­wellenlänge des betreffenden Funkbereiches ist.1. Rod-shaped radio antenna made of a flexible, electrically conductive spring element and an associated elastic rod made of dielectric material, which carries electrically connected coils, characterized in that the flexible spring element (11) and an electrically connected first coil (SP1) together a Length of L1 = λ / 4 have that a λ / 4 long second coil (SP2) connected to the first coil is connected to a λ / 8 long third coil (SP3) which is opposite to the second coil (SP2) and is wound in reverse, that the third coil (SP3) is connected to a λ / 8 long fourth coil (SP4), which is wound parallel to the second coil, and that the fourth coil (SP4) is 3/8 λ long Radiator part (13) connects, where λ is the average operating wavelength of the radio range in question. 2. Stabförmige Funkantenne nach Anspruch 1, dadurch gekennzeichnet, daß die Funkantenne (10) unter einem Winkel (α) von 0 ... 40° zur Verti­kalen angeordnet ist.2. Rod-shaped radio antenna according to claim 1, characterized in that the radio antenna (10) is arranged at an angle (α) of 0 ... 40 ° to the vertical. 3. Stabförmige Funkantenne nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Strahlerteil (13) ein auf den elastischen Stab (12) aufgebrach­tes leitendes Geflecht ist.3. Rod-shaped radio antenna according to claim 1 or 2, characterized in that the radiator part (13) is a conductive braid applied to the elastic rod (12). 4. Stabförmige Funkantenne nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Strahlerteil (13) ein auf den elastischen Stab (12) aufgebrach­ter elektrisch leitender Lack ist.4. Rod-shaped radio antenna according to claim 1 or 2, characterized in that the radiator part (13) is an electrically conductive paint applied to the elastic rod (12). 5. Stabförmige Funkantenne nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Strahlerteil (13) eine den elastischen Stab (12) umschließende elektrisch leitende Folie ist.5. rod-shaped radio antenna according to claim 1 or 2, characterized in that the radiator part (13) is an elastic rod (12) enclosing electrically conductive film. 6. Stabförmige Funkantenne nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der elastische Stab (12) ein Glasfiberstab ist, der sich vom Fußpunkt der Funkantenne zum freien Ende hin konisch verjüngt.6. Rod-shaped radio antenna according to one of claims 1 to 5, characterized in that the elastic rod (12) is a glass fiber rod which tapers conically from the base of the radio antenna to the free end. 7. Stabförmige Funkantenne nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das biegsame Federelement (11) und alle Spulen (SP1 ... SP4) sowie der Strahlerteil (13) von einer Isolierstoff­schicht umgeben sind.7. Rod-shaped radio antenna according to one of claims 1 to 6, characterized in that the flexible spring element (11) and all coils (SP1 ... SP4) and the radiator part (13) are surrounded by an insulating material layer. 8. Stabförmige Funkantenne nach Anspruch 1, dadurch gekennzeichnet, daß die zweite bis vierte Spule (SP2 ... SP4) aus einem ununter­brochenen Drahtstück bestehen.8. rod-shaped radio antenna according to claim 1, characterized in that the second to fourth coil (SP2 ... SP4) consist of an uninterrupted piece of wire.
EP90105964A 1989-06-19 1990-03-29 Whip antenna Expired - Lifetime EP0403741B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3919884A DE3919884C2 (en) 1989-06-19 1989-06-19 Rod-shaped radio antenna
DE3919884 1989-06-19

Publications (3)

Publication Number Publication Date
EP0403741A2 true EP0403741A2 (en) 1990-12-27
EP0403741A3 EP0403741A3 (en) 1991-05-29
EP0403741B1 EP0403741B1 (en) 1994-06-01

Family

ID=6382985

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90105964A Expired - Lifetime EP0403741B1 (en) 1989-06-19 1990-03-29 Whip antenna

Country Status (5)

Country Link
US (1) US5061942A (en)
EP (1) EP0403741B1 (en)
AT (1) ATE106612T1 (en)
DE (2) DE3919884C2 (en)
DK (1) DK0403741T3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5359340A (en) * 1992-09-30 1994-10-25 Fujitsu Limited Helical antenna for portable radio communication equipment
JPH07504795A (en) * 1993-01-29 1995-05-25 モトローラ・インコーポレイテッド Antenna structure for wireless circuit and its method
DE202005008338U1 (en) * 2005-05-24 2005-12-22 Fuba Automotive Gmbh & Co. Kg Antenna configuration for radio reception in motor vehicle e.g. cabriolet, has bulk connection for transducers and arranged in roof system, over springy contact that is between movable metallic components of system and metallic carriage
RU2755589C1 (en) * 2020-03-23 2021-09-17 Федеральное государственное казенное военное образовательное учреждение высшего образования "Военная академия войсковой противовоздушной обороны Вооруженных Сил Российской Федерации имени Маршала Советского Союза А.М. Василевского" Министерства обороны Российской Федерации Common-mode straight-line vhf pin antenna array

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE864710C (en) * 1951-08-21 1953-01-26 Sihn Kg Wilhelm Jun Flexible rod antenna, especially for vehicles
FR2001420A1 (en) * 1968-02-06 1969-09-26 Ohkubo Yoshie PREPARATION OF AN ANTENNA TO MAKE AN ELECTROCONDUCTOR A SOFT INSULATING ROD
US3541554A (en) * 1967-10-09 1970-11-17 Coil Research L Tunable whip antenna
DE2257352A1 (en) * 1972-11-22 1974-05-30 Kathrein Werke Kg VEHICLE ANTENNA
US4375642A (en) * 1980-09-25 1983-03-01 Robert Bosch Gmbh Rod antenna, particularly for mobile FM signal transducing applications
DE8622412U1 (en) * 1986-08-21 1986-11-20 Hummel, Peter, 7012 Fellbach, De

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4097867A (en) * 1975-09-23 1978-06-27 James Joseph Eroncig Helical antenna encased in fiberglass body
US4101898A (en) * 1976-07-26 1978-07-18 David Lee Ingram Base fed, top-loaded vertical whip antenna
US4161737A (en) * 1977-10-03 1979-07-17 Albright Eugene A Helical antenna
US4163981A (en) * 1978-03-27 1979-08-07 Wilson Thomas J Spring tunable helical whip antenna
US4490727A (en) * 1979-10-18 1984-12-25 Mobile Mark, Inc. Adjustable top loaded antenna
US4404564A (en) * 1980-01-09 1983-09-13 Wilson George P Attachment for antennas to improve reception and transmission
US4675687A (en) * 1986-01-22 1987-06-23 General Motors Corporation AM-FM cellular telephone multiband antenna for motor vehicle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE864710C (en) * 1951-08-21 1953-01-26 Sihn Kg Wilhelm Jun Flexible rod antenna, especially for vehicles
US3541554A (en) * 1967-10-09 1970-11-17 Coil Research L Tunable whip antenna
FR2001420A1 (en) * 1968-02-06 1969-09-26 Ohkubo Yoshie PREPARATION OF AN ANTENNA TO MAKE AN ELECTROCONDUCTOR A SOFT INSULATING ROD
DE2257352A1 (en) * 1972-11-22 1974-05-30 Kathrein Werke Kg VEHICLE ANTENNA
US4375642A (en) * 1980-09-25 1983-03-01 Robert Bosch Gmbh Rod antenna, particularly for mobile FM signal transducing applications
DE8622412U1 (en) * 1986-08-21 1986-11-20 Hummel, Peter, 7012 Fellbach, De

Also Published As

Publication number Publication date
DE3919884A1 (en) 1990-12-20
EP0403741B1 (en) 1994-06-01
DE3919884C2 (en) 1994-05-19
DE59005882D1 (en) 1994-07-07
DK0403741T3 (en) 1994-09-19
US5061942A (en) 1991-10-29
ATE106612T1 (en) 1994-06-15
EP0403741A3 (en) 1991-05-29

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