EP0841715B1 - Flat antenna - Google Patents
Flat antenna Download PDFInfo
- Publication number
- EP0841715B1 EP0841715B1 EP97118934A EP97118934A EP0841715B1 EP 0841715 B1 EP0841715 B1 EP 0841715B1 EP 97118934 A EP97118934 A EP 97118934A EP 97118934 A EP97118934 A EP 97118934A EP 0841715 B1 EP0841715 B1 EP 0841715B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- surface segment
- segment
- short
- earth reference
- flat
- 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.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
-
- 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
- H01Q1/3291—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle mounted in or on other locations inside the vehicle or vehicle body
-
- 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
- H01Q5/378—Combination of fed elements with parasitic 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
- H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
-
- 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
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
Definitions
- the invention relates to flat antennas for terrestrial radiated signals and for Radio links with frequencies in the GHz range, in particular for mobile radio in the 900 MHz band and in the 1.8 GHz band, with those specified in the preamble of the main claim Generic features.
- the invention is based on an active principle which is characterized, inter alia, in German Patent Application No. 195 04 577 by means of typical solutions of the preceding prior art:
- Two planar-parallel surface elements of electrically conductive material which are connected by a lateral short circuit and one of which (the "ground reference surface") to the outer conductor and the other (the "surface segment” with the function-determining contours and dimensions) to the inner conductor of a coaxial feed cable is connected, form quasi a cavity resonator during operation.
- a field builds up in the resonance case, which leads to a radial radiation in useful orders of magnitude.
- the essentially function-determining dimension of the surface segment connected to the inner conductor namely the distance from the side with the short-circuit connection to the opposite surface edge, is usually based on the dimension of a quarter of the wavelength corresponding to the average operating frequency range.
- German Patent Application No. 196 14 068 If you bulge the ground reference surface at least in one coordinate on both sides towards the edge, for example, it forms similar to a shallow trough or dome, then the dimensions of the ground reference surface can be reduced without the antenna function and the radiation parameters are affected.
- the first describes an antenna for the Japanese PDC 800 mobile network operating in two adjacent subbands separated by a frequency gap.
- an independent upper surface segment with antenna function is provided above the common ground reference surface.
- the dimensions of the surface segments hardly differ, and they are one above the other, arranged in a manner of action.
- the fitting curve of the overall arrangement shows narrowband matching separately for each of the two subbands.
- the upper antenna can be moved above the lower parallel to the ground reference surface.
- this principle is very specific to the Japanese mobile networks and not suitable for use in other countries.
- a universal antenna for the different network frequencies together requires broadband and gapless adaptation from the smallest of the possible frequencies to the highest.
- the invention is based on the object cost-effective measures for lossless. Influencing the operating parameters of broadband, universally deployable Flat antennas to develop the specified in the preamble of the main claim genus so that the antennas better adapted to the specifics of different mounting positions and flexibility in the application of the principle is extended.
- the variation of the radiation characteristic is determined by the division of the area segment in Connection with the second short circuit allows.
- the division about in two halves below Maintaining the overall size ⁇ / 4 has proven to be a good starting position in experiments proven; with small changes in the division ratio and the width of the gap then additional corrections are possible.
- To adjust or correct the impedance in the feed point serve the short, band-like Line sections on both sides of the to the inner conductor of the antenna cable galvanic connected subarea.
- the dimensioning is done experimentally. The dimensions will be with spherical formation of the ground reference surface even from the distance to the edge of the Calotte determined.
- With the measures according to the invention could also the radiation characteristics of the antenna to be corrected by DE 195 14 068: By the division principle and with the Pipe sections achieved almost perfect all-round radiation with good adaptation.
- FIG 2 shows an embodiment according to the above-mentioned German application no. 196 14 068.
- the ground reference surface is formed here, with all sides bent edge, as a flat cap 7.
- the dome is connected to one side conductive to the mass 8, for example, to the metallic roof edge above the vehicle rear window. 9
- the dimensions of the dome are reduced to a quarter of the dimensions of the ground reference surface 3 according to Figure 1, and except for the mentioned level differences in the vehicle longitudinal axis relative to the antenna of Figure 1 no impairment of the antenna parameters are observed.
- the new antenna consists of two partial surfaces 10 and 11, which are each connected via a separate web 12, 13 - as short-circuit connections - with the ground reference surface 3.
- the width of the gap 14 in the variant in Figure 3a and b is chosen so that the gap is not recognized by the respective operating frequency of the antenna field as such and that there is a continuous area for this field.
- the relative dielectric constant can be the antenna parameters additionally influence.
- the attached to the surface portion 11 sections serve 15, by Variation of the dimensions C and D, the precise adaptation to the input impedance of the cable.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Waveguide Aerials (AREA)
Description
Die Erfindung betrifft Flachantennen für terrestrisch abgestrahlte Signale und für Funkverbindungen mit Frequenzen im GHz-Bereich, insbesondere für den Mobilfunk im 900-MHz- und im 1,8-GHz-Band, mit den im Oberbegriff des Hauptanspruchs angegebenen Gattungsmerkmalen.The invention relates to flat antennas for terrestrial radiated signals and for Radio links with frequencies in the GHz range, in particular for mobile radio in the 900 MHz band and in the 1.8 GHz band, with those specified in the preamble of the main claim Generic features.
Die Erfindung geht von einem Wirkprinzip aus, das u.a. in der deutschen Patentanmeldung
Nr. 195 04 577 an Hand typischer Lösungen des vorangegangenen Stands der Technik
charakterisiert wird:
Zwei zueinander planparallele Flächenelemente aus elektrisch leitendem Material, die durch
einen seitlichen Kurzschluß verbunden sind und von denen eines (die "Massebezugsfläche")
an den Außenleiter und das andere (das "Flächensegment" mit den funktionsbestimmenden
Konturen und Abmessungen) an den Innenleiter eines speisenden Koaxialkabels angeschlossen
ist, bilden bei Betrieb quasi einen Hohlraumresonator. An den offenen Seitenbereichen baut
sich im Resonanzfall ein Feld auf, das zu einer radialen Strahlung in nutzbaren
Größenordnungen führt.The invention is based on an active principle which is characterized, inter alia, in German Patent Application No. 195 04 577 by means of typical solutions of the preceding prior art:
Two planar-parallel surface elements of electrically conductive material, which are connected by a lateral short circuit and one of which (the "ground reference surface") to the outer conductor and the other (the "surface segment" with the function-determining contours and dimensions) to the inner conductor of a coaxial feed cable is connected, form quasi a cavity resonator during operation. At the open side areas, a field builds up in the resonance case, which leads to a radial radiation in useful orders of magnitude.
Wenn bei dieser Anordnung die Massebezugsfläche ausreichend größer als das mit dem
Innenleiter verbundene Flächensegment ist, oder wenn sie unmittelbar über einer größeren
leitenden Fläche positioniert wird, erhält man eine Strahlungscharakteristik ähnlich der eines
Monopols.
Das im wesentlichen funktionsbestimmende Maß des an den Innenleiter angeschlossenen
Flächensegments, nämlich der Abstand von der Seite mit der Kurzschlußverbindung zum
gegenüberliegenden Flächenrand, orientiert sich üblicherweise an dem Maß eines Viertels der
dem mittleren Betriebsfrequenzbereich entsprechenden Wellenlänge.With this arrangement, if the ground reference area is sufficiently larger than the area segment connected to the inner conductor, or if it is positioned immediately above a larger conductive area, a radiation characteristic similar to that of a monopole is obtained.
The essentially function-determining dimension of the surface segment connected to the inner conductor, namely the distance from the side with the short-circuit connection to the opposite surface edge, is usually based on the dimension of a quarter of the wavelength corresponding to the average operating frequency range.
Besondere Ausgestaltungen dieses Prinzips finden sich in der europäischen Patentanmeldung 0 740 361. Dort wird vorgeschlagen, Flachantennen fur unterschiedliche Frequenzen miteinander und mit anderen Antennentypen zu kombinieren. So ist es möglich, eine Antenne für den 1,8-GHz-Bereich mit einer für 900 MHz auf einer gemeinsamen Grundplatte zu montieren - übereinander oder nebeneinander - oder eine der beiden Flachantennen oder beide mit einer Streifenleiterantenne (patch antenna) zu kombinieren. Die Anordnungen sind für den Betrieb auf waagerechten metallischen Karosserieflächen geeignet.Particular embodiments of this principle can be found in the European patent application 0 740 361. There is proposed flat antennas for different frequencies to combine with each other and with other types of antennas. So it is possible to have an antenna for the 1.8 GHz range with one for 900 MHz on a common base plate too mount - one above the other or next to each other - or one of the two flat antennas or both to be combined with a patch antenna. The arrangements are for the Operation on horizontal metallic body surfaces suitable.
Weiterführende Untersuchungen hatten die in der deutschen Patentanmeldung Nr. 196 14 068
beschriebene Erfindung zum Ergebnis:
Wenn man die Massebezugsfläche zumindest in einer Koordinate beidseitig zum Rand hin
aufwölbt, sie z.B. ähnlich einer flachen Mulde oder Kalotte ausbildet, dann können die
Abmessungen der Massebezugsfläche verringert werden, ohne daß die Antennenfunktion und
die Strahlungsparameter beeinträchtigt werden.Further investigations led to the result of the invention described in German Patent Application No. 196 14 068:
If you bulge the ground reference surface at least in one coordinate on both sides towards the edge, for example, it forms similar to a shallow trough or dome, then the dimensions of the ground reference surface can be reduced without the antenna function and the radiation parameters are affected.
Einen Nachteil hat das hier beschriebene Antennenprinzip: Es verlangt annähernd symmetrische Verhältnisse in der Zuordnung der beiden flächigen Komponenten, d.h. eine möglichst zentrische Anordnung des Flächensegments über der Massebezugsfläche. Das führt zu Problemen bei der Positionierung derartiger Antennen z.B. an Fahrzeugkarosserien, für die sie auf Grund der flachen Bauweise an sich prädestiniert sind. Wenn die Flachantenne nicht als zusätzliches Außen- und Anbauteil - z.B. auf dem metallischen Dach oder einer Haube - "geduldet" wird, dann bietet sich am ehesten noch die Anbringung im Fahrzeuginneren unterhalb der Front- oder der Heckscheibe an. Dazu sollte die Scheibe möglichst flach geneigt sein. Eine Anordnung z.B. an einer Heckscheibe ist in der schon erwähnten DE 196 14 068 beschrieben; sie wurde ermöglicht durch die Verringerung der Abmessungen der Massebezugsfläche auf Grund der sphärischen Ausbildung. Dabei haben die Scheibenschräge und ein gewisses, durch das anschließende Fahrzeugdach gegebenes Masse-Ungleichgewicht zur Folge, daß sich die Strahlungscharakteristik in der Horizontalen etwas veschiebt, d.h. die Strahlungscharakteristik erscheint als in Richtung des Fahrzeughecks verschobener Kreis, und der Pegel ist in Richtung Fahrzeugfront etwas schwächer. Dieses Ergebnis galt es im vorliegenden Kontext zu verbessern.One disadvantage has the antenna principle described here: it requires approximately symmetrical Ratios in the assignment of the two sheet components, i. one possible Centric arrangement of the surface segment over the ground reference surface. That leads to Problems in positioning such antennas e.g. on vehicle bodies for which they due to the flat design are predestined in itself. If the flat antenna is not as additional exterior and attachment - e.g. on the metallic roof or a hood - is "tolerated", then offers itself most likely still the attachment in the vehicle interior below the front or rear window. For this purpose, the disc should be inclined as flat as possible be. An arrangement e.g. on a rear window is in the already mentioned DE 196 14 068 described; it was made possible by reducing the dimensions of the Ground reference surface due to the spherical training. Here are the disc slant and a certain mass imbalance given by the adjoining vehicle roof As a result, the radiation pattern in the horizontal is slightly displaced, i. e. the Radiation characteristic appears as shifted in the direction of the vehicle rear circle, and the level is slightly weaker towards the front of the vehicle. This result was in the present context.
Weitere interessante Abwandlungen des Flachantennentyps finden sich in den japanischen
Patentanmeldungen Nr. 05090828 und 08250917.
Die erste beschreibt eine Antenne für das japanische PDC 800-Mobilfunknetz, das in zwei
benachbarten, durch eine Frequenzlücke getrennten Teilbändern arbeitet. Für jedes der beiden
Teilbänder ist ein eigenständiges oberes Flächensegment mit Antennenfunktion oberhalb der
gemeinsamen Massebezugsfläche vorgesehen. Die Abmessungen der Flächensegmente
differieren kaum, und sie sind übereinander, gewissermaßen gestockt, angeordnet. Es gibt
Varianten mit je einem Kurzschluß für jedes Flächensegment einzeln bzw. mit einem
gemeinsamen Kurzschlußsteg, und eine Speisung in galvanischem Anschluß für jede der
Antennen bzw. galvanisch für die untere und parasitär für die obere.
Die Anpassungskurve der Gesamtanordnung zeigt schmalbandige Anpassung separat für jedes
der beiden Teilbänder. Zur Beeinflussung bestimmter Parameter kann die obere Antenne über
der unteren parallel zur Massebezugsfläche verschoben werden.
Wie gesagt, ist dieses Prinzip ganz speziell auf die japanischen Mobilfunknetze abgestimmt und
nicht für den Einsatz in anderen Ländern geeignet. Eine Universalantenne für die
unterschiedlichen Netzfrequenzen gemeinsam setzt breitbandige und lückenlose Anpassung
von der kleinsten der möglichen Frequenzen bis zur höchsten voraus. Further interesting modifications of the flat antenna type can be found in Japanese Patent Applications Nos. 05090828 and 08250917.
The first describes an antenna for the Japanese PDC 800 mobile network operating in two adjacent subbands separated by a frequency gap. For each of the two subbands, an independent upper surface segment with antenna function is provided above the common ground reference surface. The dimensions of the surface segments hardly differ, and they are one above the other, arranged in a manner of action. There are variants, each with a short circuit for each surface segment individually or with a common shorting bar, and a supply in galvanic connection for each of the antennas or galvanic for the lower and parasitic for the upper.
The fitting curve of the overall arrangement shows narrowband matching separately for each of the two subbands. To influence certain parameters, the upper antenna can be moved above the lower parallel to the ground reference surface.
As I said, this principle is very specific to the Japanese mobile networks and not suitable for use in other countries. A universal antenna for the different network frequencies together requires broadband and gapless adaptation from the smallest of the possible frequencies to the highest.
In der Anmeldung 08250917 wird die an sich bekannte Anordnung einer Flachantenne an einem am Körper tragbaren Funkgerät mit Möglichkeiten einer nachträglichen Adjustage ergänzt. Dazu wird das über der Massefläche befindliche Flächensegment mit verschiedenartigen Schlitzmustern versehen. Die jeweils mehreren Schlitze in der leitenden Metallfläche können kurz oder lang sein und am Rand oder innerhalb der Fläche angeordnet sein und sind über die ganze Fläche verteilt. Man will mit den relativ komplizierten Mustern die Resonanzfrequenz beeinflussen. Das Prinzip hat jedoch den Nachteil, daß durch die "Perforierung" innerhalb der Fläche die Strahlungsleistung verringert wird. Die nachträgliche Feinjustierung ist darüber hinaus auch mit zusätzlichen Kosten verbunden. Es ist bekannt, daß eine nachträgliche Feinabstimmung bei patches für GPS-Antennen bei manchen Produzenten manuell durch Abkratzen der metallischen Beschichtung vorgenommen wird.In the application 08250917 known per se arrangement of a flat antenna a portable radio with options for subsequent finishing added. For this purpose, the surface segment located above the ground surface is included provided various slot patterns. The several slots in the conductive Metal surface can be short or long and placed on the edge or inside the surface be and are spread over the whole area. One wants with the relatively complicated patterns the Affect resonant frequency. However, the principle has the disadvantage that by the "Perforation" within the area the radiant power is reduced. The subsequent Fine adjustment is also associated with additional costs. It is known that a subsequent fine-tuning of patches for GPS antennas with some producers manually by scraping off the metallic coating.
Der Erfindung liegt die Aufgabe zugrunde, kostengünstige Maßnahmen zur verlustlosen . Beeinflussung der Betriebsparameter von breitbandigen, universell einsatzfähigen Flachantennen der im Oberbegriff des Hauptanspruchs angegebenen Gattung zu entwickeln, damit die Antennen besser an die Spezifika unterschiedlicher Einbaupositionen angepaßt werden können und die Flexibilität in der Anwendung des Prinzips erweitert wird.The invention is based on the object cost-effective measures for lossless. Influencing the operating parameters of broadband, universally deployable Flat antennas to develop the specified in the preamble of the main claim genus so that the antennas better adapted to the specifics of different mounting positions and flexibility in the application of the principle is extended.
Diese Aufgabe wird erfindungsgemäß mit den im kennzeichnenden Teil des Hauptanspruchs angegebenen Merkmalen gelöst. Die Unteransprüche enthalten bevorzugte Ausführungsvarianten und -details.This object is achieved with the characterizing part of the main claim solved characteristics. The subclaims contain preferred Design variants and details.
Durch die Erfindung gelingt es, Einfluß auf die Strahlungscharakteristik der Flachantenne zu
nehmen und dadurch die typische Rundumstrahlung auch bei für das Prinzip zunächst
ungünstigen Einsatzbedingungen zu gewährleisten.
Parallel dazu wird mit den erfindungsgmäßen Mitteln abgesichert, daß unabhängig von allen
Modifikationen bei Antennen des hier beschriebenen Aufbaus immer auch eine gute Anpassung
und eine guter Gewinn erzielt werden kann.By means of the invention, it is possible to influence the radiation characteristic of the planar antenna and thereby to ensure the typical all-round radiation even when the operating conditions are initially unfavorable to the principle.
In parallel, it is ensured with the erfindungsgmäßen means that regardless of all the modifications in antennas of the structure described here always a good match and a good profit can be achieved.
Die Variation der Strahlungscharakteristik wird durch die Teilung des Flächensegments in Verbindung mit dem zweiten Kurzschluß ermöglicht. Die Teilung etwa in zwei Hälften unter Beibehaltung des Gesamtmaßes λ/4 hat sich in Versuchen als günstige Ausgangsposition erwiesen; mit geringen Änderungen des Teilungsverhältnisses sowie der Breite des Spalts sind dann ergänzende Korrekturen möglich. Zur Einstellung bzw. Korrektur der Impedanz im Speisepunkt dienen die kurzen, bandartigen Leitungsstücke beidseits der an den Innenleiter des Antennenkabels galvanisch angeschlossenen Teilfläche. Die Bemaßung erfolgt experimentell. Die Abmessungen werden bei sphärischer Ausbildung der Massebezugsfläche auch noch vom Abstand zum Rand der Kalotte bestimmt. Mit den erfindungsgemäßen Maßnahmen konnte auch die Strahlungscharakteristik der Antenne nach DE 195 14 068 "korrigiert" werden: Durch das Teilungsprinzip und mit den Leitungsstücken wurde eine fast vollkommene Rundumstrahlung bei guter Anpassung erzielt.The variation of the radiation characteristic is determined by the division of the area segment in Connection with the second short circuit allows. The division about in two halves below Maintaining the overall size λ / 4 has proven to be a good starting position in experiments proven; with small changes in the division ratio and the width of the gap then additional corrections are possible. To adjust or correct the impedance in the feed point serve the short, band-like Line sections on both sides of the to the inner conductor of the antenna cable galvanic connected subarea. The dimensioning is done experimentally. The dimensions will be with spherical formation of the ground reference surface even from the distance to the edge of the Calotte determined. With the measures according to the invention could also the radiation characteristics of the antenna to be corrected by DE 195 14 068: By the division principle and with the Pipe sections achieved almost perfect all-round radiation with good adaptation.
Die Erfindung wird im folgenden an Hand von Ausführungsbeispielen näher erläutert. In der zugehörigen Zeichnung zeigen in schematischer Darstellung
Figur 1.- Flachantenne, Stand der Technik
Figur 2.- Flachantenne mit kalottenartiger Massebezugsfläche, Stand der Technik
- Figur 3a, 3b
- Prinzip der vorliegenden Erfindung
- FIG. 1
- Flat antenna, prior art
- FIG. 2.
- Flat antenna with dome-shaped ground reference surface, prior art
- Figure 3a, 3b
- Principle of the present invention
Figur 1 verdeutlicht den grundsätzlichen Aufbau der Flachantenne gemäß dem Stand der
Technik. Die Antenne besteht aus dem Blechsegment 1, dem Steg 2 als Kurzschlußverbindung
und der Blechplatte 3 als Massebezugsfläche. Das Speisekabel 4 ist durch den Außenleiter im
Punkt 5 mit der Blechplatte 3 und durch den Innenleiter im Speisepunkt 6 mit dem
Blechsegment 1 verbunden.
Charakteristische Maße, die in einem Ausführungsbeispiel des bekannten Stands der Technik
z.B. für einen Betriebsfrequenzbereich bei 900 MHz angegeben wurden, sind
- Blechsegment: 76 x 87 mm,
- Abstand zwischen Blechsegment und Blechplatte: 13 mm,
- Blechplatte: 254 x 332 cm.
Characteristic measures which have been given in an embodiment of the known state of the art, for example for an operating frequency range at 900 MHz, are
- Sheet metal segment: 76 x 87 mm,
- Distance between sheet metal segment and metal plate: 13 mm,
- Sheet metal: 254 x 332 cm.
Figur 2 zeigt eine Ausführung nach der oben erwähnten deutschen Anmeldung Nr. 196 14 068.
Die Massebezugsfläche ist hier, mit allseitig aufgebogenem Rand, als flache Kalotte 7
ausgebildet.
Die Kalotte ist an einer Seite leitend an die Masse 8 angeschlossen, z.B. an den metallischen
Dachrand oberhalb der Kfz-Heckscheibe 9.
Die Abmessungen der Kalotte sind auf ein Viertel der Maße der Massebezugsfläche 3 gemäß
Figur 1 reduziert, und bis auf die erwähnten Pegelunterschiede in der Fahrzeug-Längsachse
sind gegenüber der Antenne nach Figur 1 keine Beeinträchtigungen der Antennenparameter
festzustellen. Figure 2 shows an embodiment according to the above-mentioned German application no. 196 14 068. The ground reference surface is formed here, with all sides bent edge, as a
The dome is connected to one side conductive to the mass 8, for example, to the metallic roof edge above the vehicle rear window. 9
The dimensions of the dome are reduced to a quarter of the dimensions of the
In Figur 3 sind Anordnungen gemäß der vorliegenden Erfindung dargestellt. Die neue Antenne
besteht aus zwei Teilflächen 10 und 11, die jede über einen separaten Steg 12, 13 - als
Kurzschlußverbindungen - mit der Massebezugsfläche 3 verbunden sind.
Die Breite des Spalts 14 bei der Variante in Figur 3a und b ist so gewählt, daß der Spalt von
dem der jeweiligen Betriebsfrequenzder Antenne entsprechenden Feld nicht als solcher erkannt
wird und daß für dieses Feld eine durchgehende Fläche vorliegt.In Figure 3, arrangements according to the present invention are shown. The new antenna consists of two
The width of the
Durch Variation der Breite des Spalts 14 und
darüber hinaus der relativen Dielektrizitätskonstante kann man die Antennenparameter
zusätzlich beeinflussen. Die an die Teilfläche 11 angesetzten Abschitte 15 dienen, durch
Variation der Maße C und D, der präzisen Anpassung an die Eingangsimpedanz des Kabels.By varying the width of the
Es wird betont, daß mit allen hier gezeigten Ausführungsvarianten für den Funkbereich wie auch - bei Kombination zweier Antennen - für den Betrieb in einer zusätzlichen Frequenz gute bis sehr gute Strahlungscharakteristika erzielt wurden.It is emphasized that with all embodiments shown here for the radio range such also - when combining two antennas - good for operation in an additional frequency until very good radiation characteristics were achieved.
Claims (4)
- Flat aerial for frequencies in the GHz range, consisting of a first (10) and a second surface segment (11) of electrically conductive material and a larger conductive surface (3) acting as the earth reference surface, and an aerial cable (4), whereincharacterised in thatthe surface segments (10, 11) are arranged over the earth reference surface (3), in each case at a specified distance and plane-parallel thereto, and each comprise, in an edge region, their own short-circuit connection (12, 13) to the earth reference surface (3),the second surface segment (11) is galvanically connected to the inner conductor of the aerial cable (4) and the earth reference surface (3) is connected to the outer conductor of the aerial cable (4),the two surface segments (10, 11) are situated in one plane and arranged in a row so that the open side of the first surface segment (10) . faces the short-circuited side of the second surface segment and is spaced therefrom by a gap (14),the first surface segment (10) is electrically coupled, in the region of the gap (14), to the second surface segment (11) for the particular operating frequency of the arrangement,the second surface segment (11) is provided with symmetrically arranged surface portions (15) acting as open conducting members, to influence the impedance at the feeder point, the surface portions (15) projecting laterally on both sides in the plane of the second surface segment (11), andthe Hf-active overall dimensions between the edge of the short-circuit connection (12) on the first surface segment (10) and the opposite outer edge of the second surface segment (11) are equal to the dimensions of one-quarter of the wavelength corresponding to the mean operating frequency.
- Flat aerial according to claim 1, characterised in that the short-circuit connection (12) of the first surface segment (10) is connected to the surface segment (10) not at right angles but at an obtuse angle.
- Flat aerial according to claim 1, characterised in that the first surface segment (10) overlaps the second surface segment (11) via an interposed dielectric.
- Flat aerial according to claim 1, characterised in that the earth reference surface (3) is domed on both sides towards the edge in at least one coordinate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19646100 | 1996-11-08 | ||
| DE19646100A DE19646100A1 (en) | 1996-11-08 | 1996-11-08 | Flat antenna |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0841715A2 EP0841715A2 (en) | 1998-05-13 |
| EP0841715A3 EP0841715A3 (en) | 2000-04-26 |
| EP0841715B1 true EP0841715B1 (en) | 2005-03-16 |
Family
ID=7811040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97118934A Expired - Lifetime EP0841715B1 (en) | 1996-11-08 | 1997-10-30 | Flat antenna |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US5929812A (en) |
| EP (1) | EP0841715B1 (en) |
| DE (2) | DE19646100A1 (en) |
Families Citing this family (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19828122A1 (en) * | 1998-06-25 | 1999-12-30 | Fuba Automotive Gmbh | Flat antenna, especially for frequencies in GHz range |
| SE513525C2 (en) | 1998-11-20 | 2000-09-25 | Smarteq Ab | An antenna device |
| AU2903600A (en) * | 1999-03-05 | 2000-09-28 | Telital R & D Denmark A/S | A microstrip antenna arrangement in a communication device |
| GB2347792B (en) * | 1999-03-10 | 2001-06-06 | Andrew Jesman | Antenna |
| DE10080718D2 (en) * | 1999-03-24 | 2002-02-28 | Siemens Ag | Multiband antenna |
| DE19922699C2 (en) | 1999-05-18 | 2001-05-17 | Hirschmann Electronics Gmbh | Antenna with at least one vertical radiator |
| US6211831B1 (en) * | 1999-06-24 | 2001-04-03 | Delphi Technologies, Inc. | Capacitive grounding system for VHF and UHF antennas |
| WO2001028035A1 (en) | 1999-10-12 | 2001-04-19 | Arc Wireless Solutions, Inc. | Compact dual narrow band microstrip antenna |
| SE517564C2 (en) | 1999-11-17 | 2002-06-18 | Allgon Ab | Antenna device for a portable radio communication device, portable radio communication device with such antenna device and method for operating said radio communication device |
| SE516474C2 (en) * | 1999-11-19 | 2002-01-22 | Allgon Ab | Antenna device and communication device comprising such an antenna device |
| DE19957865A1 (en) * | 1999-12-01 | 2001-06-07 | Volkswagen Ag | Antenna arrangement for a vehicle |
| US6509882B2 (en) | 1999-12-14 | 2003-01-21 | Tyco Electronics Logistics Ag | Low SAR broadband antenna assembly |
| US6518933B2 (en) | 2001-05-30 | 2003-02-11 | Ads Corporation | Low profile antenna |
| GB2392563B (en) * | 2002-08-30 | 2004-11-03 | Motorola Inc | Antenna structures and their use in wireless communication devices |
| DE102006039357B4 (en) * | 2005-09-12 | 2018-06-28 | Heinz Lindenmeier | Antenna diversity system for radio reception for vehicles |
| RU2465738C2 (en) * | 2006-02-22 | 2012-10-27 | Медиа Тек Инк. | Mobile communication device with internal antennae |
| WO2008027719A1 (en) * | 2006-08-31 | 2008-03-06 | 3M Innovative Properties Company | Rfid tag including a three-dimensional antenna |
| DE102007017478A1 (en) * | 2007-04-13 | 2008-10-16 | Lindenmeier, Heinz, Prof. Dr. Ing. | Receiving system with a circuit arrangement for the suppression of switching interference in antenna diversity |
| DE102008031068A1 (en) * | 2007-07-10 | 2009-01-15 | Lindenmeier, Heinz, Prof. Dr. Ing. | Antenna diversity system for relatively broadband radio reception in vehicles |
| DE102007039914A1 (en) * | 2007-08-01 | 2009-02-05 | Lindenmeier, Heinz, Prof. Dr. Ing. | Antenna diversity system with two antennas for radio reception in vehicles |
| DE102008003532A1 (en) * | 2007-09-06 | 2009-03-12 | Lindenmeier, Heinz, Prof. Dr. Ing. | Antenna for satellite reception |
| US8289163B2 (en) * | 2007-09-27 | 2012-10-16 | 3M Innovative Properties Company | Signal line structure for a radio-frequency identification system |
| US20090085750A1 (en) * | 2007-09-27 | 2009-04-02 | 3M Innovative Properties Company | Extended RFID tag |
| US8717244B2 (en) | 2007-10-11 | 2014-05-06 | 3M Innovative Properties Company | RFID tag with a modified dipole antenna |
| US8085203B1 (en) | 2008-04-18 | 2011-12-27 | Aero Antenna Inc. | Ground surrounded non-resonant slot-like patch antenna |
| EP2209221B8 (en) * | 2009-01-19 | 2019-01-16 | Fuba Automotive Electronics GmbH | Receiver for summating phased antenna signals |
| DE102009011542A1 (en) * | 2009-03-03 | 2010-09-09 | Heinz Prof. Dr.-Ing. Lindenmeier | Antenna for receiving circularly in a direction of rotation of the polarization of broadcast satellite radio signals |
| DE102009023514A1 (en) * | 2009-05-30 | 2010-12-02 | Heinz Prof. Dr.-Ing. Lindenmeier | Antenna for circular polarization with a conductive base |
| WO2018101104A1 (en) * | 2016-11-29 | 2018-06-07 | 株式会社村田製作所 | Antenna device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08250917A (en) * | 1995-03-09 | 1996-09-27 | Matsushita Electric Ind Co Ltd | Antenna for radio equipment |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0659009B2 (en) * | 1988-03-10 | 1994-08-03 | 株式会社豊田中央研究所 | Mobile antenna |
| US5121127A (en) * | 1988-09-30 | 1992-06-09 | Sony Corporation | Microstrip antenna |
| JP2537390B2 (en) * | 1988-12-23 | 1996-09-25 | 原田工業株式会社 | Plane antenna |
| US5291210A (en) * | 1988-12-27 | 1994-03-01 | Harada Kogyo Kabushiki Kaisha | Flat-plate antenna with strip line resonator having capacitance for impedance matching the feeder |
| JPH02308604A (en) * | 1989-05-23 | 1990-12-21 | Harada Ind Co Ltd | Flat plate antenna for mobile communication |
| JP2712931B2 (en) * | 1991-09-30 | 1998-02-16 | 三菱電機株式会社 | Antenna device |
| US5402136A (en) * | 1991-10-04 | 1995-03-28 | Naohisa Goto | Combined capacitive loaded monopole and notch array with slits for multiple resonance and impedance matching pins |
| US5355142A (en) * | 1991-10-15 | 1994-10-11 | Ball Corporation | Microstrip antenna structure suitable for use in mobile radio communications and method for making same |
| WO1994003940A1 (en) * | 1992-08-07 | 1994-02-17 | Deltec New Zealand Limited | A dipole |
| DE19504577A1 (en) * | 1995-02-11 | 1996-08-14 | Fuba Automotive Gmbh | Flat aerial for GHz frequency range for vehicle mobile radio or quasi-stationary aerial |
| EP0740361B1 (en) * | 1995-04-20 | 1998-03-04 | FUBA Automotive GmbH | Flat antenna arrangement |
| DE29606475U1 (en) * | 1996-04-09 | 1996-06-27 | FUBA Automotive GmbH, 31162 Bad Salzdetfurth | Flat antenna |
-
1996
- 1996-11-08 DE DE19646100A patent/DE19646100A1/en not_active Withdrawn
-
1997
- 1997-10-30 EP EP97118934A patent/EP0841715B1/en not_active Expired - Lifetime
- 1997-10-30 DE DE59712229T patent/DE59712229D1/en not_active Expired - Lifetime
- 1997-11-07 US US08/966,500 patent/US5929812A/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08250917A (en) * | 1995-03-09 | 1996-09-27 | Matsushita Electric Ind Co Ltd | Antenna for radio equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0841715A3 (en) | 2000-04-26 |
| DE19646100A1 (en) | 1998-05-14 |
| US5929812A (en) | 1999-07-27 |
| EP0841715A2 (en) | 1998-05-13 |
| DE59712229D1 (en) | 2005-04-21 |
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