EP1829158B1 - Disc-monopole antenna structure - Google Patents

Disc-monopole antenna structure Download PDF

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Publication number
EP1829158B1
EP1829158B1 EP05811095A EP05811095A EP1829158B1 EP 1829158 B1 EP1829158 B1 EP 1829158B1 EP 05811095 A EP05811095 A EP 05811095A EP 05811095 A EP05811095 A EP 05811095A EP 1829158 B1 EP1829158 B1 EP 1829158B1
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EP
European Patent Office
Prior art keywords
antenna structure
area
frame
structure according
conductor
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EP05811095A
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German (de)
French (fr)
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EP1829158A1 (en
Inventor
Thomas Hansen
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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
    • 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
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
    • 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
    • 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
    • H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
    • H01Q5/25—Ultra-wideband [UWB] systems, e.g. multiple resonance systems; Pulse systems
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • 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
    • 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
    • H01Q9/40—Element having extended radiating surface

Definitions

  • Multi-band roof antennas based on a monopole-like antenna structure are often used.
  • Monopole-like antennas have the advantage of omnidirectional characteristics and constant polarization ratios.
  • For roof antennas the lowest possible height is desired.
  • increased risk of injury in accidents involving pedestrians and Zweiradfahrenn are currently required building heights of 4 cm for roof mounting the antenna.
  • additional measures are needed to minimize the risk of injury in the event of an accident. This results in a more complicated and expensive construction of the antenna.
  • an antenna with a small height can be better integrated into the general vehicle optics, often a decisive criterion on the part of the car manufacturers.
  • the height of an antenna is determined by the lowest frequency to be received. In the case of a mobile phone antenna for Europe this is 890 MHz. For a classic ⁇ / 4 monopole, this results in a height of about 8 cm ( FIG. 1 ).
  • the height can be reduced by meandering or folding the monopoly ( FIG. 2 and FIG. 3 ).
  • the height reduction comes at the expense of the achievable bandwidth.
  • meandered or folded antennas it is often possible to cover just such a communication frequency band of a region, eg Europe or America. You then have to develop and offer your own antenna for the respective other region.
  • Disc monopole antennas are known from the prior art, which radiate adjusted from a lower cutoff frequency to a few GHz ( FIGS. 4 to 6 ).
  • the overall height of such an antenna corresponds approximately to that of a ⁇ / 4 monopole for the same lower limit frequency. In the case of 800 MHz, this is about 8 cm.
  • an antenna having a semicircular region and a frame-like region which faces away from the semicircular region. It is provided within the semicircular area a folded conductor structure which is located in a plane.
  • the JP 2003 273638 A discloses a folded antenna structure having a semicircular boundary frame and a central recess.
  • the WO 2004/010532 A1 discloses a ring structure with frame-like lugs.
  • the JP 08 018 320 A1 shows a circular disk section with an inductive conductor coupling in the region of the incomplete circular disk.
  • an antenna can be set up which radiates or receives very broadband adapted from a lower cutoff frequency and which has one or optionally further narrowband frequency bands, which are preferably below the very broadband frequency range and can cover a complete lower mobile band ,
  • the invention provides a size-reduced antenna for regionally independent mobile communication of current and future systems.
  • an additional frequency band is formed in the invention, which is broadband than in an inductive coupling of a conductor bar.
  • an additional frequency band can be made available or by combining with the first frequency band, a common broadband frequency band can be generated.
  • AMPS America
  • GSM European
  • Figures 1-6 refer to the state of the art.
  • FIG. 7 shows the basic principle of the antenna according to the invention in the form of a disc monopole structure 2, both for transmitting and for receiving operation suitable is.
  • This has in its lower region / half on a semi-circular course and has a frame-like portion having a preferably rectangular recess 5, which faces away from the semi-circular region, that is located at the opposite end.
  • two uniform and width conductor strips are formed by the recess 5 at the left and at the right edge.
  • the height of the disc monopole determines the lower limit frequency of the very broadband frequency range for higher frequency.
  • the shape of the lower edge of the disc monopole structure 2 and its distance to a conductive base plate (GND plane), the impedance behavior of the antenna is determined.
  • the recess 5 in the antenna has both an influence on the lower limit frequency of the broadband frequency range as well as on the further frequency response for the higher frequencies.
  • a first additional folded conductor in the form of a rod 3 preferably at one of its two ends galvanically or optionally via an impedance, such as a resistor 6, is connected to the lateral conductor strips of the recessed disc monopole 2.
  • At the other end remains a separation point in the form of a slot 4 between rod 3 and disc monopoly.
  • a ring current is generated in a certain frequency range, which leads to an additional frequency band of the antenna.
  • This frequency band is preferably below the lower limit frequency of the frequency range covered by the disc monopole.
  • the formation of the ring current is essentially co-controlled by the position and design of the slot 4.
  • the position of the optional resistor 6 may differ from those shown here.
  • the position of the additional frequency band can preferably be controlled by the depth of the recess 5.
  • the first additional rod can preferably be U-shaped 3a upwards ( FIG. 7 . FIGS. 9 and 10 ).
  • the additional frequency band is broadband, but also leads to a higher design.
  • the slot 4 is provided on the frame base so at the transition to the disc-like region of the structure 2, it is according to the embodiment FIG. 8 at the upper frame edge and thus also at the upper edge of the disc monopole. According to the embodiment FIG. 9 the slot 4 is provided centrally in one of the side conductors.
  • a further additional conductor bar 7 can be introduced into the region formed by the recess 5 and the first conductor bar 3 ( FIG. 12 ).
  • the additional additional rod 7 is preferably inductively coupled to one of the two strips of the disc monopole 2 formed by the recess 5 and forms either a further additional frequency band or, together with the first additional frequency band, a common broadband additional frequency band.
  • the position of the second additional frequency band can usually be adjusted via the inductance 8 of the coupling, the length and the position of the second rod 7.
  • Another possibility for optimizing the impedance behavior of the antenna in the frequency band influenced by the further rod 7 is the parallel connection of an optional active component / resistor to the inductance 8 for the coupling of the further rod 7.
  • the antenna is preferably realized on a printed circuit board, preferably consisting of a metallized on both sides with the structure of the antenna dielectric carrier.
  • a printed circuit board preferably consisting of a metallized on both sides with the structure of the antenna dielectric carrier.
  • Other today common Mehrlagen inconvenienceten are as well feasible, such as leaving dielectric carrier outside the metallic structure of the antenna.
  • FIGS. 11 and 12 show such implementations with both sides metallized circuit board 12.
  • the via which is particularly necessary in one-sided feed, done via the vias 50th
  • the recess 5 may have a shape deviating from the rectangle.
  • the width of the conductor bar 3 preferably remains opposite the embodiment with a rectangular recess FIG. 8 unchanged.
  • FIG. 13 shows a streamlined design.
  • the coupled via an inductor 8 with optional resistor further bar 7 can then be preferably arranged in the oblique edge 3a.

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

Abstract

In a disk monopole antenna structure, a semicircular region is provided, as well as an oppositely disposed, second frame-type region, which faces away from the semicircular region and forms a cut-out in the antenna structure.

Description

Stand der TechnikState of the art

Für den Betrieb von z.B. Handys zur mobilen Kommunikation aus einem Fahrzeug heraus, werden zur Verbesserung der Qualität der Kommunikation verstärkt Antennen außerhalb des Fahrzeuges verbaut. Dadurch wird die abschirmende Wirkung der Fahrzeughülle, die im allgemeinen aus elektrisch leitenden Materialien besteht, je nach Einbauort vernachlässigbar.For the operation of e.g. Cell phones for mobile communication out of a vehicle are used to enhance the quality of communication amplified antennas outside the vehicle. As a result, the shielding effect of the vehicle body, which generally consists of electrically conductive materials, depending on the installation negligible.

Da es mehrere Mobilfunk-Anbieter auf unterschiedlichen Frequenzbändern gibt, z.B. in Europa 890 bis 960 MHz und 1710 bis 1880 MHz für GSM und zukünftig 1920 bis 2170 MHz für UMTS, benötigt man Mehrband-Antennen, die diese Frequenzbereiche abdecken. Je nach Region, z.B. Europa und Amerika, liegen diese Frequenzbänder leicht versetzt zueinander, so dass eine für z.B. Europa optimierte Antenne sich nicht automatisch für den Betrieb in Amerika eignet.Since there are several mobile providers on different frequency bands, e.g. in Europe 890 to 960 MHz and 1710 to 1880 MHz for GSM and in the future 1920 to 2170 MHz for UMTS, multi-band antennas covering these frequency ranges are needed. Depending on the region, e.g. Europe and America, these frequency bands are slightly offset from one another so that one for e.g. Europe optimized antenna is not automatically suitable for operation in America.

Zum Einsatz kommen oft Mehrband-Dachantennen, die auf einer monopolartigen Antennenstruktur basieren. Monopolartige Antennen haben den Vorteil einer rundstrahlenden Charakteristik und konstanter Polarisationsverhältnisse. Für Dachantennen ist eine möglichst niedrige Bauhöhe angestrebt. Aus sicherheitstechnischen Gründen, erhöhte Verletzungsgefahr bei Unfällen mit Fußgängern und Zweiradfahrenn, sind zur Zeit noch Bauhöhen von 4 cm bei Dachmontage der Antenne verlangt. Darüber hinaus bedarf es zusätzlicher Maßnahmen, um im Falle eines Unfalls das Verletzungsrisiko zu minimieren. Dies hat einen komplizierteren und teureren Aufbau der Antenne zur Folge. Außerdem lässt sich eine Antenne mit kleiner Bauhöhe besser in die allgemeine Fahrzeugoptik integrieren, oft ein entscheidendes Kriterium seitens der Automobilhersteller.Multi-band roof antennas based on a monopole-like antenna structure are often used. Monopole-like antennas have the advantage of omnidirectional characteristics and constant polarization ratios. For roof antennas the lowest possible height is desired. For safety reasons, increased risk of injury in accidents involving pedestrians and Zweiradfahrenn, are currently required building heights of 4 cm for roof mounting the antenna. In addition, additional measures are needed to minimize the risk of injury in the event of an accident. This results in a more complicated and expensive construction of the antenna. In addition, an antenna with a small height can be better integrated into the general vehicle optics, often a decisive criterion on the part of the car manufacturers.

Die Bauhöhe einer Antenne wird durch die niedrigste zu empfangende Frequenz bestimmt. Im Falle einer Mobilfunkantenne für Europa ist dies 890 MHz. Für einen klassischen λ/4-Monopol ergibt sich daraus eine Bauhöhe von ca. 8 cm (Figur 1).The height of an antenna is determined by the lowest frequency to be received. In the case of a mobile phone antenna for Europe this is 890 MHz. For a classic λ / 4 monopole, this results in a height of about 8 cm ( FIG. 1 ).

Die Bauhöhe lässt sich jedoch durch Mäandrierung oder Faltung des Monopols reduzieren (Figur 2 und Figur 3). Die Bauhöhenreduktion geht allerdings auf Kosten der erreichbaren Bandbreite. So lassen sich mit mäandrierten bzw. gefalteten Antennen oft gerade so ein Kommunikations-Frequenzband einer Region, z.B. Europa oder Amerika, abdecken. Man muss dann für die jeweilige andere Region eine eigene Antenne entwickeln und anbieten.However, the height can be reduced by meandering or folding the monopoly ( FIG. 2 and FIG. 3 ). The height reduction, however, comes at the expense of the achievable bandwidth. With meandered or folded antennas, it is often possible to cover just such a communication frequency band of a region, eg Europe or America. You then have to develop and offer your own antenna for the respective other region.

Die Automobilindustrie fordert verstärkt neben Antennen mit niedrigen Bauhöhen, dass sich diese unabhängig von der Region einsetzen lassen.In addition to antennas with low heights, the automotive industry is increasingly demanding that they can be used independently of the region.

Aus dem Stand der Technik sind Disc-Monopol-Antennen bekannt, die ab einer unteren Grenzfrequenz bis einige GHz angepasst abstrahlen (Figur 4 bis 6). Die Bauhöhe einer solchen Antenne entspricht in etwa der eines λ/4-Monopols für die gleiche untere Grenzfrequenz. Im Falle von 800 MHz sind dies ca. 8 cm.Disc monopole antennas are known from the prior art, which radiate adjusted from a lower cutoff frequency to a few GHz ( FIGS. 4 to 6 ). The overall height of such an antenna corresponds approximately to that of a λ / 4 monopole for the same lower limit frequency. In the case of 800 MHz, this is about 8 cm.

Um bei einem Disc-Monopol zusätzliche Resonanzen zu erzeugen, wurden Koppelelemente vorgeschlagen. Diese erzeugen allerdings nur relativ schmalbandige Resonanzen, die nicht in der Lage sind, beispielsweise ein komplettes unteres Mobilfunkband bei 900 MHz für Europa und Amerika abzudecken.In order to generate additional resonances in a disc monopole, coupling elements have been proposed. However, these only produce relatively narrow-band resonances that are not able to cover, for example, a complete lower mobile band at 900 MHz for Europe and America.

Aus der US 2004/100408 A1 sind die Merkmale des Oberbegriffs des Anspruchs 1 bekannt. Auch dort ist eine Antenne mit einem semizirkularen Bereich und einem rahmenartigen Bereich bekannt, der dem semizirkularen Bereich abgewandt ist. Es ist innerhalb des semizirkularen Bereiches eine gefaltete Leiterstruktur vorgesehen, die sich in einer Ebene befindet.From the US 2004/100408 A1 the features of the preamble of claim 1 are known. There is also known an antenna having a semicircular region and a frame-like region which faces away from the semicircular region. It is provided within the semicircular area a folded conductor structure which is located in a plane.

Aus der US 2004/100409 A1 ist eine ähnliche Struktur bekannt.From the US 2004/100409 A1 a similar structure is known.

Die JP 2003 273638 A offenbart eine gefaltete Antennenstruktur mit einem Rahmen mit semizirkularer Begrenzung und einer zentralen Aussparung.The JP 2003 273638 A discloses a folded antenna structure having a semicircular boundary frame and a central recess.

Die WO 2004/010532 A1 offenbart eine Ringstruktur mit rahmenartigen Ansätzen.The WO 2004/010532 A1 discloses a ring structure with frame-like lugs.

Die JP 08 018 320 A1 zeigt einen Kreisscheibenabschnitt mit einer induktiven Leiterankopplung im Bereich der nicht vollständigen Kreisscheibe.The JP 08 018 320 A1 shows a circular disk section with an inductive conductor coupling in the region of the incomplete circular disk.

Vorteile der ErfindungAdvantages of the invention

Mit den Maßnahmen des Anspruchs 1 lässt sich eine Antenne aufbauen, die ab einer unteren Grenzfrequenz sehr breitbandig angepasst abstrahlt bzw. empfängt und die einen bzw. optional weitere schmalbandigere Frequenzbänder aufweist, die vorzugsweise unterhalb des sehr breitbandigen Frequenzbereiches liegen und ein komplettes unteres Mobilfunkband abdecken können.With the measures of claim 1, an antenna can be set up which radiates or receives very broadband adapted from a lower cutoff frequency and which has one or optionally further narrowband frequency bands, which are preferably below the very broadband frequency range and can cover a complete lower mobile band ,

Die Erfindung stellt eine größenreduzierte Antenne für regional unabhängige mobile Kommunikation aktueller und zukünftiger Systeme zur Verfügung.The invention provides a size-reduced antenna for regionally independent mobile communication of current and future systems.

In den Unteransprüchen sind vorteilhafte Ausgestaltungen aufgezeigt.In the dependent claims advantageous embodiments are shown.

Neben dem zusätzlich nutzbaren mindestens einen schmalbandigeren aber dennoch relativ breitbandigen Frequenzbandes lässt sich auch eine Reduktion der Bauhöhe erzielen. Insbesondere wird bei der Erfindung ein zusätzliches Frequenzband ausgebildet, das breitbandiger ist als bei einer induktiven Ankopplung eines Leiterstabes.In addition to the additionally usable at least one narrowband but nevertheless relatively broadband frequency band, a reduction of the overall height can be achieved. In particular, an additional frequency band is formed in the invention, which is broadband than in an inductive coupling of a conductor bar.

Insbesondere durch die Maßnahmen des Anspruch 5 kann entweder ein zusätzliches Frequenzband zur Verfügung gestellt werden oder durch Kombination mit dem ersten Frequenzband ein gemeinsames breitbandigeres Frequenzband erzeugt werden. Durch die Erfindung kann z.B. dann auch eine regional unabhängige Abdeckung der unteren Kommunikation-Frequenzbänder für AMPS (Amerika) und GSM (Europa) erfolgen.In particular, by the measures of claim 5 either an additional frequency band can be made available or by combining with the first frequency band, a common broadband frequency band can be generated. By the invention, e.g. then a regionally independent coverage of the lower communication frequency bands for AMPS (America) and GSM (Europe) take place.

Zeichnungendrawings

Figuren 1 - 6 beziehen sich auf den Stand der Technik. Figures 1-6 refer to the state of the art.

Anhand der Figuren 7 - 12 werden Ausführungsbeispiele der Erfindung näher erläutert.Based on FIGS. 7-12 Embodiments of the invention will be explained in more detail.

Es zeigen:

  • Figur 7 eine Disc-Monopol-Antenne mit galvanisch angekoppeltem U-förmigen Leiter,
  • Figur 8 eine Disc-Monopol-Antenne mit galvanisch angekoppeltem gefalteten Leiter durch Aussparung des Disc-Monopols nach innen,
  • Figur 9 eine Disc-Monopol-Antenne mit Zusatzresonanz, die durch Kombination aus den Figuren 7 und 8 entsteht,
  • Figur 10 eine Optimierung der Zusatzresonanz über einen optionalen Widerstand zur Ankopplung des zusätzlichen Leiters an den Disc-Monopol,
  • Figur 11 ein Realisierungsbeispiel für eine Disc-Monopol-Antenne mit beidseitig metallisierter Leiterplatte,
  • Figur 12 eine Disc-Monopol-Antenne mit einer weiteren Zusatzresonanz ebenfalls auf beidseitig metallisierter Leiterplatte.
Show it:
  • FIG. 7 a disc monopole antenna with galvanically coupled U-shaped conductor,
  • FIG. 8 a disc monopole antenna with galvanically coupled folded conductor by recess of the disc monopole inside,
  • FIG. 9 a disc monopole antenna with additional resonance, by combining the FIGS. 7 and 8 arises
  • FIG. 10 an optimization of the additional resonance via an optional resistor for coupling the additional conductor to the disc monopole,
  • FIG. 11 an implementation example of a disc monopole antenna with metallized circuit board on both sides,
  • FIG. 12 a disc monopole antenna with a further additional resonance also on both sides metallized circuit board.

Beschreibung von AusführungsbeispielenDescription of exemplary embodiments

Figur 7 zeigt das Grundprinzip der erfindungsgemäßen Antenne in Form einer Disc-Monopol-Struktur 2, die sowohl für Sende- als auch für Empfangsbetrieb geeignet ist. Diese weist in ihrem unteren Bereich/Hälfte einen semi-zirkularen Verlauf auf und besitzt einen rahmenartigen Bereich, der eine vorzugsweise rechteckige Aussparung 5 aufweist, die vom semi-zirkularen Bereich abgewandt ist, d.h. sich am gegenüberliegenden Ende befindet. Vorzugsweise werden durch die Aussparung 5 an der linken und an der rechten Kante zwei gleichförmige und -breite Leiterstreifen gebildet. Durch die Höhe des Disc-Monopols wird die untere Grenzfrequenz des sehr breitbandigen Frequenzbereichs für höhere Frequenz festgelegt. Durch die Form der unteren Kante der Disc-Monopol-Struktur 2 und ihrem Abstand zu einer leitenden Grundplatte (GND-Plane) wird das Impedanzverhalten der Antenne bestimmt. Die Aussparung 5 in der Antenne hat sowohl einen Einfluss auf die untere Grenzfrequenz des breitbandigen Frequenzbereiches als auch auf den weiteren Frequenzverlauf für die höheren Frequenzen. Quer zur oberen Kante des Disc-Monopols verläuft, vorzugsweise über die gesamte Breite, in einem gewissen Abstand ein erster zusätzlicher gefalteter Leiter in Form eines Stabes 3, der vorzugsweise an einem seiner beiden Enden galvanisch oder optional über eine Impedanz, beispielsweise einen Widerstand 6, mit den seitlichen Leiterstreifen des ausgesparten Disc-Monopols 2 verbunden ist. An dem anderen Ende verbleibt eine Trennstelle in Form eines Schlitzes 4 zwischen Stab 3 und Disc-Monopol. Um den durch den Stab 3 und der Kante der Aussparung 5 im Disc-Monopol gebildeten Bereich, wird in einem gewissen Frequenzbereich ein Ringstrom erzeugt, der zu einem zusätzlichen Frequenzband der Antenne führt. Dieses Frequenzband befindet sich vorzugsweise unterhalb der unteren Grenzfrequenz des durch den Disc-Monopol abgedeckten Frequenzbereiches. Die Ausbildung des Ringstromes wird im wesentlichen durch die Position und Ausführung des Schlitzes 4 mitgesteuert. Die Ankopplung des zusätzlichen Stabes 3 über einen optionalen Widerstand 6, anstelle einer rein galvanischen Kopplung, kann das Impedanzverhalten der Antenne im zusätzlichen Frequenzband günstig FIG. 7 shows the basic principle of the antenna according to the invention in the form of a disc monopole structure 2, both for transmitting and for receiving operation suitable is. This has in its lower region / half on a semi-circular course and has a frame-like portion having a preferably rectangular recess 5, which faces away from the semi-circular region, that is located at the opposite end. Preferably, two uniform and width conductor strips are formed by the recess 5 at the left and at the right edge. The height of the disc monopole determines the lower limit frequency of the very broadband frequency range for higher frequency. The shape of the lower edge of the disc monopole structure 2 and its distance to a conductive base plate (GND plane), the impedance behavior of the antenna is determined. The recess 5 in the antenna has both an influence on the lower limit frequency of the broadband frequency range as well as on the further frequency response for the higher frequencies. Transversely to the upper edge of the disc monopole runs, preferably over the entire width, at a certain distance, a first additional folded conductor in the form of a rod 3, preferably at one of its two ends galvanically or optionally via an impedance, such as a resistor 6, is connected to the lateral conductor strips of the recessed disc monopole 2. At the other end remains a separation point in the form of a slot 4 between rod 3 and disc monopoly. Around the area formed by the rod 3 and the edge of the recess 5 in the disc monopole, a ring current is generated in a certain frequency range, which leads to an additional frequency band of the antenna. This frequency band is preferably below the lower limit frequency of the frequency range covered by the disc monopole. The formation of the ring current is essentially co-controlled by the position and design of the slot 4. The coupling of the additional rod 3 via an optional resistor 6, instead of a purely galvanic coupling, the impedance behavior of the antenna in the additional frequency band low

beeinflussen. Die Position des optionalen Widerstandes 6 kann von den hier gezeigten abweichen. Die Lage des zusätzlichen Frequenzbandes lässt sich vorzugsweise durch die Tiefe der Aussparung 5 steuern. Optional kann man den ersten zusätzlichen Stab vorzugsweise U-förmig 3a nach oben ausbilden (Figur 7, Figur 9 und 10). Dabei wird das zusätzliche Frequenzband breitbandiger, führt aber auch zu einer höheren Bauform.influence. The position of the optional resistor 6 may differ from those shown here. The position of the additional frequency band can preferably be controlled by the depth of the recess 5. Optionally, the first additional rod can preferably be U-shaped 3a upwards ( FIG. 7 . FIGS. 9 and 10 ). The additional frequency band is broadband, but also leads to a higher design.

Während beim Ausführungsbeispiel gemäß Figur 7 der Schlitz 4 am Rahmengrund also am Übergang auf den scheibenartigen Bereich der Struktur 2 vorgesehen ist, liegt er beim Ausführungsbeispiel gemäß Figur 8 an der oberen Rahmenkante und damit auch an der Oberkante des Disc-Monopols. Beim Ausführungsbeispiel gemäß Figur 9 ist der Schlitz 4 mittig in einem der Seitenleiter vorgesehen.While in the embodiment according to FIG. 7 the slot 4 is provided on the frame base so at the transition to the disc-like region of the structure 2, it is according to the embodiment FIG. 8 at the upper frame edge and thus also at the upper edge of the disc monopole. According to the embodiment FIG. 9 the slot 4 is provided centrally in one of the side conductors.

Optional lässt sich in die erfindungsgemäße Antenne mit einer Aussparung 5 ein weiterer zusätzlicher Leiterstab 7 in dem durch die Aussparung 5 und erstem Leiterstab 3 gebildeten Bereich einbringen (Figur 12). Der weitere zusätzliche Stab 7 ist vorzugsweise induktiv 8 an einem der beiden durch die Aussparung 5 gebildeten Streifen des Disc-Monopols 2 angekoppelt und bildet entweder ein weiteres zusätzliches Frequenzband oder zusammen mit dem ersten zusätzlichen Frequenzband ein gemeinsames breitbandigeres zusätzliches Frequenzband. Die Lage des zweiten zusätzlichen Frequenzbandes kann üblicherweise über die Induktivität 8 der Ankopplung, der Länge und der Lage des zweiten Stabes 7 eingestellt werden. Eine weitere Möglichkeit zur Optimierung des Impedanzverhaltens der Antenne in dem durch den weiteren Stab 7 beeinflussten Frequenzband besteht in der Parallelschaltung eines optionalen Wirkanteiles/Widerstandes zu der Induktivität 8 für die Ankopplung des weiteren Stabes 7.Optionally, in the antenna according to the invention with a recess 5, a further additional conductor bar 7 can be introduced into the region formed by the recess 5 and the first conductor bar 3 ( FIG. 12 ). The additional additional rod 7 is preferably inductively coupled to one of the two strips of the disc monopole 2 formed by the recess 5 and forms either a further additional frequency band or, together with the first additional frequency band, a common broadband additional frequency band. The position of the second additional frequency band can usually be adjusted via the inductance 8 of the coupling, the length and the position of the second rod 7. Another possibility for optimizing the impedance behavior of the antenna in the frequency band influenced by the further rod 7 is the parallel connection of an optional active component / resistor to the inductance 8 for the coupling of the further rod 7.

Es ist natürlich möglich weitere zusätzliche Stäbe 7, vorzugsweise induktiv an einem der beiden durch die Aussparung 5 gebildeten Streifen des Disc-Monopols 2 anzukoppeln. Dadurch lässt sich vorzugsweise die Bandbreite des zusätzlichen Frequenzbandes günstig beeinflussen.It is of course possible to couple additional additional rods 7, preferably inductively, to one of the two strips of the disc monopole 2 formed by the recess 5. As a result, preferably the bandwidth of the additional frequency band can be favorably influenced.

Für einen kostengünstigen Aufbau wird die Antenne vorzugsweise auf einer Leiterplatte, vorzugsweise bestehend aus einem beidseitig mit der Struktur der Antenne metallisierten dielektrischen Träger realisiert. Weitere heute übliche Mehrlagenaufbauten sind ebenso realisierbar, wie das Stehenlassen von dielektrischem Träger außerhalb der metallischen Struktur der Antenne.For a cost-effective design, the antenna is preferably realized on a printed circuit board, preferably consisting of a metallized on both sides with the structure of the antenna dielectric carrier. Other today common Mehrlagenaufbauten are as well feasible, such as leaving dielectric carrier outside the metallic structure of the antenna.

Die Figuren 11 und 12 zeigen solche Realisierungen mit beidseitig metallisierter Leiterplatte 12. Die Durchkontaktierung, die insbesondere bei einseitiger Speisung notwendig ist, geschieht über die Vias 50.The FIGS. 11 and 12 show such implementations with both sides metallized circuit board 12. The via, which is particularly necessary in one-sided feed, done via the vias 50th

Für eine bessere Integration in das die Antenne umgebende Design, kann die Aussparung 5 eine vom Rechteck abweichende Form aufweisen. Die Breite des Leiterstabes 3 bleibt vorzugsweise gegenüber der Ausführung mit rechteckförmiger Aussparung Figur 8 unverändert.For a better integration in the design surrounding the antenna, the recess 5 may have a shape deviating from the rectangle. The width of the conductor bar 3 preferably remains opposite the embodiment with a rectangular recess FIG. 8 unchanged.

So lässt sich z.B. wie Figur 13 zeigt ein stromlinienförmiges Design erzielen. Der über eine Induktivität 8 mit optionalem Widerstand angekoppelte weitere Stab 7 kann dann vorzugsweise in der schrägen Kante 3a angeordnet werden.So can be like FIG. 13 shows a streamlined design. The coupled via an inductor 8 with optional resistor further bar 7 can then be preferably arranged in the oblique edge 3a.

Natürlich ist es möglich noch weitere Stäbe in der Aussparung 5 unterzubringen, um weitere Frequenzbänder abzudecken.Of course, it is possible to accommodate even more rods in the recess 5 to cover more frequency bands.

Claims (10)

  1. Disc-monopole antenna structure having a first disc-like, semi-circular area and a second frame-like area which is arranged opposite the semi-circular area, facing away therefrom, and forms a cut-out (5) in the antenna structure, wherein the frame-like area is electrically coupled or coupled via an impedance (6) to the other disc-monopole antenna structure, characterized in that the frame-like area is composed of a folded conductor structure which has a dividing point (4), wherein the dividing point (4) constitutes a slit in the frame-like area, and in that the frame-like area is essentially enclosed.
  2. Antenna structure according to Claim 1, characterized in that the frame-like area is embodied in a rectangular shape with two side conductors and an upper conductor, wherein these three conductors form the edge of the antenna structure on the side opposite the semi-circular area.
  3. Antenna structure according to Claim 2, characterized in that the central conductor is embodied in a U-shape (3a), wherein at least one of its limbs is continuous with one of the two side conductors or ends at the dividing point (4) or at the coupling point of the impedance (6).
  4. Antenna structure according to one of Claims 1 to 3, characterized in that at least one conductor (7) projects into the cut-out (5) from the frame-like area.
  5. Antenna structure according to Claim 4, characterized in that the at least one conductor (7) which projects into the frame-like area is connected via a coupling (8) to one of the conductors of the frame-like area.
  6. Antenna structure according to Claim 5, characterized in that the coupling is embodied in essentially inductive fashion, if appropriate parallel to a resistor.
  7. Antenna structure according to one of Claims 1 to 6, characterized in that the conductor structures (3, 3a) of the frame-like area are embodied in strip shapes or rod shapes.
  8. Antenna structure according to one of Claims 1 to 7, characterized in that the frame-like area which is formed by the conductor structures (3, 3a) deviate from the rectangular shape.
  9. Antenna structure according to one of Claims 1 to 8, characterized in that the antenna structure is implemented on a printed circuit board, preferably composed of a dielectric carrier which is metallized on both sides with the structure of the antenna.
  10. Antenna structure according to one of Claims 1 to 9, characterized in that the antenna structure is dimensioned in such a way that it has a broadband irradiation behaviour starting from a lower cut-off frequency, and at least one further narrowband irradiation area, preferably below the cut-off frequency.
EP05811095A 2004-12-13 2005-11-18 Disc-monopole antenna structure Not-in-force EP1829158B1 (en)

Applications Claiming Priority (2)

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DE102004059916A DE102004059916A1 (en) 2004-12-13 2004-12-13 Disc monopole antenna structure
PCT/EP2005/056064 WO2006063916A1 (en) 2004-12-13 2005-11-18 Disc-monopole antenna structure

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EP1829158A1 EP1829158A1 (en) 2007-09-05
EP1829158B1 true EP1829158B1 (en) 2010-05-19

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EP (1) EP1829158B1 (en)
JP (1) JP4630344B2 (en)
KR (1) KR101067657B1 (en)
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AT (1) ATE468627T1 (en)
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DE (2) DE102004059916A1 (en)
WO (1) WO2006063916A1 (en)

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JP2008523751A (en) 2008-07-03
AU2005315689A1 (en) 2006-06-22
KR101067657B1 (en) 2011-09-27
CN101076922B (en) 2012-07-18
WO2006063916A1 (en) 2006-06-22
US20080094285A1 (en) 2008-04-24
CN101076922A (en) 2007-11-21
DE102004059916A1 (en) 2006-06-14
ATE468627T1 (en) 2010-06-15
US8223086B2 (en) 2012-07-17
KR20070091142A (en) 2007-09-07
DE502005009613D1 (en) 2010-07-01
AU2005315689B2 (en) 2010-05-27
EP1829158A1 (en) 2007-09-05
JP4630344B2 (en) 2011-02-09

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