EP2287966A1 - Mât d'antenne pour une antenne en forme de mât pour plusieurs services radio - Google Patents

Mât d'antenne pour une antenne en forme de mât pour plusieurs services radio Download PDF

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Publication number
EP2287966A1
EP2287966A1 EP10171466A EP10171466A EP2287966A1 EP 2287966 A1 EP2287966 A1 EP 2287966A1 EP 10171466 A EP10171466 A EP 10171466A EP 10171466 A EP10171466 A EP 10171466A EP 2287966 A1 EP2287966 A1 EP 2287966A1
Authority
EP
European Patent Office
Prior art keywords
rod
antenna
plastic
low
conductor
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
EP10171466A
Other languages
German (de)
English (en)
Other versions
EP2287966B1 (fr
Inventor
Stefan Lindenmeier
Heinz Lindenmeier
Leopold Reiter
Jochen Hopf
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.)
Delphi Delco Electronics Europe GmbH
Original Assignee
Delphi Delco Electronics Europe GmbH
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Filing date
Publication date
Application filed by Delphi Delco Electronics Europe GmbH filed Critical Delphi Delco Electronics Europe GmbH
Publication of EP2287966A1 publication Critical patent/EP2287966A1/fr
Application granted granted Critical
Publication of EP2287966B1 publication Critical patent/EP2287966B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/362—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith for broadside radiating helical antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • 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
    • 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 relates to an antenna rod for a rod antenna on a motor vehicle for attachment and electrical connection to the electro-mechanical base terminal of a low and on the vehicle body mounted plastic base member which includes the further antenna circuit which is connected to the electro-mechanical base terminal containing a plastic rod on which an antenna coil is applied.
  • An antenna rod of this kind is known, for example, as a short-rod antenna from the DE102004053354A1 , in particular for radio reception in motor vehicles.
  • the antenna rod is mounted on a plastic part and forms the RF emitter. It is envisaged to carry out the helix with differentiated pitch, in order to use the shank in addition to the frequencies of the radio broadcasting also for the operation in the frequencies of the mobile radio in the 900 MHz as well as in the 1.8 GHz range.
  • the height of such antennas is of particular importance. They are preferably used on the roof of the motor vehicle and, if the length is too great, constitute an obstacle, in particular in the case of parking garages with a low overall height and so-called double parkers.
  • the radiator bandwidth of electrically short rod antennas increases approximately with the cube of the length of the antenna rod relative to the free space wavelength of the operating frequency.
  • this law especially in the frequency range of the FM radio with the bandwidth of about 20 MHz in conjunction with the already low in this frequency range ambient noise a particular difficulty in the design of very short Rod antennas.
  • Antennas according to the cited prior art usually have a length of 40 cm. Add to that Demand for the lowest possible manufacturability of such antenna rods, which are subject to a particularly high cost pressure in vehicle technology.
  • the object of the invention is therefore to provide an antenna rod, which on the one hand in the frequency range of VHF radio provides the smallest possible length as large as possible reception voltage and also allows operation in the radio services with higher frequency and a particularly cost-effective production.
  • Fig. 1a shows a substantially vertical antenna rod 1 according to the invention for a rod antenna assembly on a vehicle body 12, which serves as a mass 29 of the rod antenna assembly.
  • the antenna rod 1 includes a plastic rod 7, on which an antenna coil 2 is applied.
  • a coupling conductor 4 which consists of a stretched, electrically conductive element and parallel to Rod axis 8 of the antenna rod 1 is guided.
  • the coupling conductor 4 is performed in coverage 9 of several, but at least two turns of the coil 2 via an interposed low-loss insulator 10 over the length of the cover 9 to the antenna coil 2 galvanically separated, so that over this length a capacitive coupling to the antennas -Wendel 2 is given.
  • the coupling conductor 4, the low-loss insulator 10 and the antenna rod are mechanically fixed to one another and at the lower end of the coupling conductor 4 it is equipped with an electromechanical connection element 14 for connection to the electro-mechanical base connection 5.
  • An antenna rod 1 of this type is usually connected to the electro-mechanical base terminal 5 of a low and on the vehicle body 12 fixed plastic base part 3, which includes the further antenna circuit 6, which is connected to the electro-mechanical base terminal 5.
  • An antenna rod according to the invention has the advantage over those of the prior art that the combination of the capacitive coupling of the coupling conductor 4 via the low-loss insulator 10 to the antenna coil 2 over the length of the cover 9, an increase in the receiving voltage of the antenna rod. 1 in the FM band is achievable.
  • This increased radiation resistance is advantageously increased in a wide frequency range around the passage of the impedance 33 in the frequency point of the low-impedance resonance, whereby an increase in the receiving voltage is given with a relatively large frequency bandwidth.
  • the length of the cover 9 is chosen to be 5 cm and should generally be at least 2 cm and not more than 6 cm. With a total of about 200 turns of constant pitch, an overlap 9 of about 60 turns has been found to be useful. Furthermore, it proves to be further appropriate to make the static capacitance between the coupling conductor 4 and the antenna coil 2 sufficiently large and not smaller than 3pF.
  • the tuning of the antenna rod is advantageously to be carried out in such a way that the low-resistance resonance in the frequency range between 75 MHz and 110 MHz occurs.
  • An essential advantage associated with the present invention in the low-effort production of the antenna rod results from the fixed mechanical connection between the coupling conductor 4, the low-loss insulator 10 and the antenna rod.
  • the coupling conductor 4 is equipped at its lower end with an electromechanical connecting element 14. According to the invention, there is thus no galvanically conductive connection between the antenna helix 2 and the connection to the continuing antenna circuit 6.
  • the antenna coil 2 supporting plastic rod 7 can thus be produced, for example, endless, separated into appropriate lengths and completely encased with an insulating material and - without soldering - for example by gluing with the coupling conductor be added to the antenna rod 1.
  • Fig. 1b shows the perspective view of an antenna rod 1 according to the invention, which is designed substantially with a rectangular cross-section.
  • For capacitive coupling of the coupling conductor 4 is advantageously designed as a flat band conductor.
  • Fig. 1c the longitudinal section of the antenna rod 1 with representation of the electro-mechanical connecting element 14 with a fixed electrical connection to the coupling conductor 4 is shown.
  • a particular advantage of an antenna rod 1 according to the invention is its particular suitability for the low-effort design for multiple radio services.
  • the antenna rod 1 is designed for a rod antenna arrangement for the additional reception of VHF broadcast signals.
  • the antenna rod 1 connected to the electro-mechanical base terminal 5 of the plastic base part 3, as in connection with the Fig. 1a is described, and the electro-mechanical base terminal 5 is a parallel resonant circuit 35 with the parallel resonant frequency between 120 MHz and 160 MHz, as in Fig. 1d shown, connected downstream, so the vote of the antenna rod 1 and the parallel resonant circuit 35 are each designed in such a way that the measurable between the free end of the parallel resonant circuit 35 and the ground 29 impedance 33 in the Figure 3 has shown frequency profile.
  • the impedance 33 in the frequency range between 75 MHz and 110 MHz for the function in the FM frequency range, a first low-impedance resonance and in the Frequency range between 175 MHz and 240 MHz for the function in the VHF frequency range passes through a second low-impedance resonance.
  • Antennenstabil 13 of h 15 cm and less are for the reception of the FM and VHF radio band in a further advantageous embodiment of the invention
  • the diameter, the pitch of the turns and the diameter of the wire-shaped conductor 11 of the antenna helix 2 matched in the following special way.
  • This tuning takes place in such a way that when a series connection of a capacitance and an inductance is inserted between the base terminal 5 and the ground 29, the impedance measured in parallel to the inductance passes through a low-impedance resonance in the frequency range between 190 MHz and 230 MHz.
  • the inductance is advantageous in the way to choose that when using this circuit in the continuing antenna circuit 6 in both the frequency range of FM broadcasting and VHF broadcasting when connecting an FM / VHF antenna amplifier with input side high-impedance field effect transistor parallel to the inductor each gives the necessary bandwidth in these frequency ranges.
  • the capacity for the propagation of the signals in these frequency ranges sufficiently, however, on the other hand not too large to choose when connecting an AM amplifier with input side high-impedance field effect transistor at the input of the AM amplifier between the base terminal 5 and the ground 29, these signals not too much to weaken.
  • Favorable values for such a capacity are between 5pF and 20pF; favorable values for the inductance are between 500nH and 1500nH.
  • the coupling conductor 4 is designed for the design of an antenna rod 1 for a rod antenna arrangement for the reception of AM / FM / VHF and a radio service in the L-band.
  • the length of the coupling conductor 15 for the reception of a radio service in the L-frequency band is selected to be 1 ⁇ 4 of the free space wavelength of the frequency of the radio service.
  • the necessary for the vote of the antenna coil 2 low slope
  • the wire helix leads to a high-impedance structure in the frequency range of the L-frequency band, which barely influences the radiation behavior of the coupling conductor 4 designed as an L-band radiator.
  • Such an advantageously designed antenna rod 1 allows in accordance with broadband design of the above-mentioned FM / VHF antenna amplifier as FM / VHF / L-band amplifier, the inclusion of the broadcast band in the L-band frequency.
  • the antenna rod 1 thus designed enables the reception of all the broadcast bands AM, FM, VHF and L-band in the above-mentioned advantageous small antenna rod length 13.
  • the plastic rod 7 - as in FIG. 4 shown - designed in its lower portion at least over the length of the cover 9 tubular.
  • the coupling conductor 4 is designed in the form of a round rod, is inserted into the tubular plastic rod 7 and mechanically fixedly connected thereto.
  • the low-loss insulator 10 is tubular in this case formed by the tubular plastic rod 7 itself. At its lower end, this coupling conductor 4 is connected to the electro-mechanical connecting element 14.
  • the entire plastic rod 7 is tubular and is wound with a wire-shaped conductor 11 for the design of the antenna helix 2 with a constant pitch.
  • the length of the cover 9 is given by the length of the penetrating into the tubular plastic rod 7 coupling conductor 4.
  • the coupling conductor 4 is - as in FIG. 5 shown - designed as an electrically conductive sleeve 16, which consists of a substantially tubular body having a lid located at one end.
  • the sleeve is lined in an exemplary embodiment in its inner boundary with an electrically insulating plastic sheath as a low-loss insulator 10.
  • the latter comprises positively locking the introduced into the electrically conductive sleeve 16 with plastic sheath, the antenna coil 2 supporting plastic rod 7 at least over the length of the cover 9.
  • the electrically conductive sleeve 16 includes at its lower end the electro-mechanical connecting element 14 for connection to the electro-mechanical base terminal 5 of the plastic base part.
  • FIG. 6a In a further advantageous embodiment of the invention are - as in FIG. 6a represented - the antenna coil 2 supporting plastic rod 7 and the electrically conductive sleeve 16 each designed with a circular cross-section.
  • the low-loss insulator 10 is formed by an insulator sleeve 22, the latter being positively inserted into the electrically conductive sleeve 16 and in which turn the antenna coil 2 supporting plastic rod 7 at least over the length of the cover 9 at its lower end is introduced positively.
  • the tubular insulator 21 is formed in the interior of the electrically conductive sleeve 16, wherein at the lower end of an insulating disc 24 is inserted to avoid a galvanic contact between the antenna coil 2 and the electrically conductive sleeve 16. If, for structural reasons, a very thin wall thickness of the tubular insulator 21 is required, the pipe wall can be provided with apertures for reducing the coupling capacity for a given dielectric constant of the insulator material.
  • FIG. 6b represents - the antenna coil 2 supporting plastic rod 7 made of a highly elastic rod 26 with a substantially circular cross-section made of fiberglass reinforced plastic to form the restoring force.
  • the diameter of the plastic rod 7 should not be chosen smaller than 2 mm.
  • the low-loss insulator 10 is as in FIG. 6c represented by the dielectrically low-loss insulating selected material 27 for the plastic protective casing 25 itself formed.
  • the diameter of the electrically conductive sleeve 16 is chosen to be correspondingly larger than the diameter of the antenna helix 2 supporting plastic rod 7. This is introduced during manufacture in the electrically conductive sleeve 16 that the low-loss insulator 10 by inflow of the dielectric low-loss insulating material 27 between the electrically conductive sleeve 16 and the antenna coil 2 supporting plastic rod 7 is formed.
  • the encapsulation of the antenna rod 1 with the protective plastic coating 25 and the production of the low-loss insulator 10 can be carried out advantageously in one operation.
  • the plastic rod 7 and the antenna helix 2 of the antenna rod 1 are formed from one part in such a way that the wire-shaped conductor 11 as a printed conductor 28 on both sides of an elongated, printed circuit board 23 is applied.
  • Figure 7a shows an antenna coil 2 as a printed conductor 28 on both sides of an elongated printed circuit board 23 as a plastic rod 7 in a perspective view.
  • the mutually associated portions of the printed conductors on both sides are connected to form the antenna coil 2 by means of vias 31 conductive each other.
  • the coupling conductor 4 embodied as a printed conductor track 28 is capacitively coupled to the plated-through holes 31, so-called via-holes.
  • the thickness of the circuit board for achieving a sufficiently large cross-sectional area of the antenna coil 2 thus formed is selected to be correspondingly large.
  • FIG. 7b is to increase the existing between the coupling conductor 4 and the turns of the antenna helix 2 thus formed existing Capacity an interdigital structure 30 designed.
  • This is formed by the fact that short printed circuit printed conductors are led to the printed conductor track 28 of the coupling conductor and are arranged interdigitally between the conductor parts of the antenna coil 2 which are also guided essentially parallel to one another.
  • FIG. 7c shows a side view of the antenna rod 1 to illustrate the electro-mechanical connecting element 14 for attachment to the electro-mechanical base terminal 5 of the plastic base part.
  • this coupling coil 32 can be applied, for example, made of wire to a tubular body, which is pushed over the antenna coil 2.
  • the increase in the bandwidth results from the formation of the loop in the complex impedance plane, which can be achieved by the appropriate coordination of the two helices 2 and 32 with respect to the geometry of the two turns together with the dielectric properties of the materials.
  • the spiral cover 34 - this is the length over which the antenna coil 2 is covered by the coupling coil 32 - should not fall below 1/4 of the antenna coil 2.

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  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Details Of Aerials (AREA)
EP10171466.5A 2009-08-17 2010-07-30 Mât d'antenne pour une antenne en forme de mât pour plusieurs services radio Active EP2287966B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009037722A DE102009037722A1 (de) 2009-08-17 2009-08-17 Antennenstab für eine Stabantenne für mehrere Funkdienste

Publications (2)

Publication Number Publication Date
EP2287966A1 true EP2287966A1 (fr) 2011-02-23
EP2287966B1 EP2287966B1 (fr) 2018-05-30

Family

ID=43303241

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10171466.5A Active EP2287966B1 (fr) 2009-08-17 2010-07-30 Mât d'antenne pour une antenne en forme de mât pour plusieurs services radio

Country Status (3)

Country Link
US (1) US8610631B2 (fr)
EP (1) EP2287966B1 (fr)
DE (1) DE102009037722A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2518827A1 (fr) * 2011-04-27 2012-10-31 Infac Elecs Co., Ltd. Antenne double bande pour véhicule
CN110011023A (zh) * 2012-09-26 2019-07-12 株式会社友华 天线装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009037722A1 (de) * 2009-08-17 2011-02-24 Heinz Prof. Dr.-Ing. Lindenmeier Antennenstab für eine Stabantenne für mehrere Funkdienste
DE102012003460A1 (de) 2011-03-15 2012-09-20 Heinz Lindenmeier Multiband-Empfangsantenne für den kombinierten Empfang von Satellitensignalen und terrestrisch ausgestrahlten Rundfunksignalen
TWM424630U (en) * 2011-08-31 2012-03-11 Mascot Electric Co Ltd Antenna device
JP6334313B2 (ja) * 2014-08-19 2018-05-30 株式会社ヨコオ 複合アンテナ及びその製造方法
CN108321527A (zh) * 2017-12-29 2018-07-24 浙江联品电子科技有限公司 一种便于安装的调频广播发射天线

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0790666A1 (fr) * 1996-02-16 1997-08-20 Lk-Products Oy Structure combinée d'une antenne hélice et une plaque diélectrique
WO2001011721A1 (fr) * 1999-08-11 2001-02-15 Allgon Ab Petite antenne multibande
GB2410837A (en) * 2004-02-06 2005-08-10 Harada Ind Co Ltd Multi-band mast antenna using parasitic element
DE102004053354A1 (de) 2004-09-06 2006-03-09 Fuba Automotive Gmbh & Co. Kg Kurzstab-Antenne
EP1926175A1 (fr) * 2006-11-22 2008-05-28 Hirschmann Car Communication GmbH Antenne fouet avec différents enroulements segmentés d'antenne

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4137534A (en) * 1977-05-26 1979-01-30 Goodnight Roy G Vertical antenna with low angle of radiation
JP3213564B2 (ja) * 1997-02-26 2001-10-02 日本アンテナ株式会社 多共振アンテナ
JP3825408B2 (ja) * 2001-02-26 2006-09-27 日本アンテナ株式会社 多周波用アンテナ
GB2400497B (en) * 2003-04-07 2007-03-21 Harada Ind Multi-band antenna and connectable communication circuitry,for vehicular application
DE102009037722A1 (de) * 2009-08-17 2011-02-24 Heinz Prof. Dr.-Ing. Lindenmeier Antennenstab für eine Stabantenne für mehrere Funkdienste

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0790666A1 (fr) * 1996-02-16 1997-08-20 Lk-Products Oy Structure combinée d'une antenne hélice et une plaque diélectrique
WO2001011721A1 (fr) * 1999-08-11 2001-02-15 Allgon Ab Petite antenne multibande
GB2410837A (en) * 2004-02-06 2005-08-10 Harada Ind Co Ltd Multi-band mast antenna using parasitic element
DE102004053354A1 (de) 2004-09-06 2006-03-09 Fuba Automotive Gmbh & Co. Kg Kurzstab-Antenne
EP1926175A1 (fr) * 2006-11-22 2008-05-28 Hirschmann Car Communication GmbH Antenne fouet avec différents enroulements segmentés d'antenne

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2518827A1 (fr) * 2011-04-27 2012-10-31 Infac Elecs Co., Ltd. Antenne double bande pour véhicule
CN110011023A (zh) * 2012-09-26 2019-07-12 株式会社友华 天线装置
CN110011023B (zh) * 2012-09-26 2021-03-12 株式会社友华 天线装置

Also Published As

Publication number Publication date
US20110193755A1 (en) 2011-08-11
EP2287966B1 (fr) 2018-05-30
DE102009037722A1 (de) 2011-02-24
US8610631B2 (en) 2013-12-17

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