EP2287966B1 - 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
EP2287966B1
EP2287966B1 EP10171466.5A EP10171466A EP2287966B1 EP 2287966 B1 EP2287966 B1 EP 2287966B1 EP 10171466 A EP10171466 A EP 10171466A EP 2287966 B1 EP2287966 B1 EP 2287966B1
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EP
European Patent Office
Prior art keywords
rod
antenna
plastic
antenna coil
low
Prior art date
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Application number
EP10171466.5A
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German (de)
English (en)
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EP2287966A1 (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
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Delphi Delco Electronics Europe GmbH
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Publication of EP2287966A1 publication Critical patent/EP2287966A1/fr
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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

  • Another antenna rod 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 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.
  • 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 each other and at the lower end of the coupling conductor 4 it is equipped with an electro-mechanical connecting element 14 for connection to the electro-mechanical base terminal 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 member 3, which includes the further antenna circuit 6, which is connected to the electromechanical base terminal 5.
  • Such an antenna rod has over the prior art the advantage that by combining 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 VHF Frequency range is achievable.
  • this occurs caused by the capacitive coupling of the coupling conductor 4, over several turns to the antenna coil 2, a much larger active component of the impedance 33, as he with a simple antenna coil without the measures with respect to the wavelength
  • 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, 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 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 an advantageous embodiment of the invention
  • the diameter, the pitch of the turns and the diameter of the wire-shaped conductor 11 of the antenna coil. 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 for corresponding broadband design of the above-mentioned FM / VHF antenna amplifier as FMNHF / 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.
  • 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.
  • 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.

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

Claims (14)

  1. Tige d'antenne (1) pour un agencement d'antenne en tige, dans laquelle
    - la tige d'antenne (1) comprend une tige en matière plastique (7) sur laquelle est montée une hélice d'antenne (2),
    - à l'extrémité inférieure de la tige en matière plastique (7) et parallèlement à son axe de tige (8), un élément étiré électriquement conducteur est mené à titre de conducteur de couplage (4) pour le couplage électromagnétique jusqu'à l'hélice d'antenne (2), en chevauchement (9) d'au moins deux spires de l'hélice d'antenne (2),
    - le conducteur de couplage (4) est séparé par voie galvanique de l'hélice d'antenne (2) par un isolateur (10) à faible perte, de sorte qu'il se présente un couplage capacitif à l'hélice d'antenne (2),
    - le conducteur de couplage (4), l'isolateur (10) à faible perte et la tige d'antenne sont fermement reliés entre eux par voie mécanique, et
    - le conducteur de couplage (4) est muni, à son extrémité inférieure, d'un élément de liaison électromécanique (14),
    caractérisée en ce que
    le conducteur de couplage (4) est conçu sous forme de douille électriquement conductrice (16) qui est habillée dans sa bordure intérieure par une enveloppe en matière plastique électriquement isolante à titre d'isolateur (10) à faible perte, enveloppe qui entoure par coopération de formes, au moins sur la longueur du chevauchement (9), la tige en matière plastique (7) qui est insérée dans la douille électriquement conductrice (16) et pourvue de l'enveloppe en matière plastique, et qui porte l'hélice d'antenne (2), et
    en ce que la douille électriquement conductrice (16) comprend à son extrémité inférieure l'élément de liaison électromécanique (14).
  2. Tige d'antenne (1) pour un agencement d'antenne en tige selon la revendication 1 pour la réception AM/FM,
    caractérisée par les éléments suivants :
    - la longueur de la tige d'antenne (13) est plus courte que 45 cm,
    - l'hélice d'antenne (2) est conçue à partir d'un conducteur (11) en forme de fil enroulé sur la tige en matière plastique (7) avec un pas sensiblement constant,
    - le diamètre, le pas des spires et le diamètre du conducteur en fil (11) de l'hélice d'antenne (2) sont adaptés entre eux pour la fonction dans la plage FM, de telle sorte que l'impédance de la tige d'antenne (1) mesurée contre la masse (29) subit une résonance de faible valeur ohmique dans la plage de fréquence comprise entre 75 MHz et 120 MHz,
    - le chevauchement (9) est choisi au minimum avec 2 cm et au maximum avec 6 cm, et l'isolateur (10) à faible perte reliant mécaniquement le conducteur de couplage (4) à la tige d'antenne (1) est choisi de telle sorte que la capacité statique entre le conducteur de couplage (4) et l'hélice d'antenne (2) est d'au moins 3 pF.
  3. Tige d'antenne (1) pour un agencement d'antenne en tige selon la revendication 2 pour la réception de radiodiffusion AM/FM et VHF,
    caractérisée en ce que cependant
    un circuit résonant parallèle de la fréquence de résonance parallèle comprise entre 120 MHz et 160 MHz est prévu à l'entrée d'un circuit d'antenne (6) complémentaire, qui est relié par l'une de ses bornes à l'élément de liaison électromécanique (14),
    en ce que le diamètre, le pas des spires et le diamètre du conducteur en fil (11) de l'hélice d'antenne (2) sont adaptés entre eux de telle sorte que l'impédance mesurée contre la masse (29) à l'autre borne du circuit résonant parallèle subit une première résonance à faible valeur ohmique pour la plage de fréquence comprise entre 75 MHz et 110 MHz pour la fonction dans la plage de fréquence FM, et subit une seconde résonance de faible valeur ohmique dans la plage de fréquence comprise entre 175 MHz et 240 MHz pour la fonction dans la plaque de fréquence VHF.
  4. Tige d'antenne (1) pour un agencement d'antenne en tige selon la revendication 3 pour la réception AM/FM/VHF et d'un service radio dans la bande L,
    caractérisée en ce que
    la longueur du conducteur de couplage (15) pour la réception d'un service radio dans la bande de fréquence L est d'environ [1/4] de la longueur d'onde en espace libre de la fréquence du service radio.
  5. Tige d'antenne (1) pour un agencement d'antenne en tige selon la revendication 2 pour la réception AM/FM et un d'service radio dans la bande L,
    caractérisée en ce que
    la longueur du conducteur de couplage (15) pour la réception d'un service radio dans la bande de fréquence L est d'environ [1/4] de la longueur d'onde en espace libre de la fréquence du service radio.
  6. Tige d'antenne (1) selon la revendication 1,
    caractérisée en ce que
    la tige en matière plastique (2) portant l'hélice d'antenne (2) et la douille électriquement conductrice (16) sont conçues chacune avec une section transversale circulaire, et il est prévu une douille d'isolateur (22) ayant une longueur minimale du chevauchement (9), dans laquelle la tige en matière plastique (7) portant l'hélice d'antenne (2) est introduite en coopération de formes par son extrémité inférieure, et celle-ci est introduite à son tour par coopération de formes dans la douille électriquement conductrice (16).
  7. Tige d'antenne (1) selon la revendication 6,
    caractérisée en ce que
    cependant, à la place de la douille d'isolateur (22), il est prévu un isolateur tubulaire (21) et à l'intérieur de la douille électriquement conductrice (16), à son extrémité inférieure, il est prévu une plaque isolante (24) pour éviter un contact galvanique entre l'hélice d'antenne (2) et la douille électriquement conductrice (16).
  8. Tige d'antenne (1) selon la revendication 1 à 7,
    caractérisée en ce que
    la tige en matière plastique (7) portant l'hélice d'antenne (2) est constituée d'une tige (26) hautement élastique à section transversale sensiblement ronde et en matière plastique renforcée de fibres de verre pour délivrer une force de rappel, dont le diamètre est choisi avec au moins 2 mm et sur laquelle est montée l'hélice d'antenne (2).
  9. Tige d'antenne (1) selon la revendication 1 à 8,
    caractérisée en ce que
    la tige en matière plastique (7) portant l'hélice d'antenne (2) est constituée d'une tige (26) hautement élastique en matière plastique renforcée de fibres de verre ayant de petites dimensions en section transversale pour délivrer une force de rappel, qui est entourée par une enveloppe de coeur de tige (17) en un matériau plus souple isolant à faible perte diélectrique pour concevoir une section transversale appropriée pour monter l'hélice d'antenne (2).
  10. Tige d'antenne (1) selon la revendication 1 à 9,
    caractérisée en ce que
    pour la protection mécanique de l'hélice d'antenne (2), la tige en matière plastique (7) portant l'hélice d'antenne (2) est entourée d'une enveloppe de protection (25) en matière plastique.
  11. Tige d'antenne (1) selon la revendication 10,
    caractérisée en ce que
    cependant, l'isolateur (10) à faible perte est formé par le matériau (27) isolant à faible perte diélectrique pour l'enveloppe de protection (25) en matière plastique,
    le diamètre de la douille électriquement conductrice (16) étant choisi d'autant plus grand que le diamètre de la tige en matière plastique (7) portant l'hélice d'antenne (2), et celle-ci est introduite dans la douille électriquement conductrice (16) lors de la fabrication de telle sorte que l'isolateur (10) à faible perte est formé par coulée du matériau (27) isolant à faible perte diélectrique entre la douille électriquement conductrice (16) et la tige en matière plastique (7) portant l'hélice d'antenne (2) lors du surmoulage de la tige d'antenne par l'enveloppe de protection (25) en matière plastique.
  12. Tige d'antenne (1) selon la revendication 9,
    caractérisée en ce que
    la tige d'antenne (1) présente une section transversale ronde et la longueur (13) de la tige d'antenne est d'environ 150 mm, le diamètre de la tige (26) hautement élastique en matière plastique renforcée de fibres de verre est d'environ 2 à 3 mm, le diamètre de l'enveloppe (18) du coeur de tige est d'environ 4 à 8 mm, le chevauchement (9) et la longueur du conducteur de couplage (15) sont d'environ 30 à 50 mm.
  13. Tige d'antenne (1) selon la revendication 1,
    caractérisée en ce que
    pour le couplage électromagnétique à l'hélice d'antenne (2), il est prévu une hélice de couplage (32) sur la tige en matière plastique (7), qui chevauche l'hélice d'antenne (2) par un chevauchement d'hélice (34) d'au moins 1/4 de la longueur de l'hélice d'antenne (2), elle est séparée de celle-ci par voie galvanique, et les deux hélices (2, 32) sont adaptées l'une à l'autre de telle sorte que la courbe de fréquence de l'impédance, mesurée contre la masse (29), de la tige d'antenne (1) raccordée à la borne de base (5) électromécanique forme, dans la plage de fréquence de la radiodiffusion FM, dans le plan d'impédance complexe, une boucle à large bande et correspond ainsi à celle d'un filtre passe-bande à deux circuits résonants.
  14. Tige d'antenne (1) pour un agencement d'antenne en tige selon la revendication 4 pour la réception AM/FM et de la bande de radiodiffusion VHF et pour la réception d'un service de radiodiffusion dans la bande L,
    caractérisée en ce que
    il est cependant prévu une capacité d'une valeur comprise entre 5 pF et 20 pF, qui est reliée par sa première borne à la borne de base (5) électromécanique, et il est prévu une inductance d'une valeur comprise entre 500 nH et 1500 nH entre une seconde borne de la capacité et la masse (29), et
    en ce que le diamètre, le pas des spires et le diamètre du conducteur en fil (11) de l'hélice d'antenne (2) sont adaptés entre eux de telle sorte que l'impédance mesurée en parallèle à l'inductance subit une résonance à faible valeur ohmique, dans la plage de fréquence comprise entre 190 MHz et 230 MHz.
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 EP2287966A1 (fr) 2011-02-23
EP2287966B1 true EP2287966B1 (fr) 2018-05-30

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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

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

Families Citing this family (8)

* 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
KR101246855B1 (ko) * 2011-04-27 2013-03-25 인팩일렉스 주식회사 차량용 듀얼 밴드 안테나
TWM424630U (en) * 2011-08-31 2012-03-11 Mascot Electric Co Ltd Antenna device
JP6010412B2 (ja) * 2012-09-26 2016-10-19 株式会社ヨコオ アンテナ装置
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
US11469502B2 (en) * 2019-06-25 2022-10-11 Viavi Solutions Inc. Ultra-wideband mobile mount antenna apparatus having a capacitive ground structure-based matching structure

Citations (1)

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JPH10242740A (ja) * 1997-02-26 1998-09-11 Nippon Antenna Co Ltd 多共振アンテナ

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US8610631B2 (en) 2013-12-17
EP2287966A1 (fr) 2011-02-23
US20110193755A1 (en) 2011-08-11
DE102009037722A1 (de) 2011-02-24

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