EP1214752B1 - Antenna for receiving satellite signals and terrestrial signals and antenna modification device - Google Patents
Antenna for receiving satellite signals and terrestrial signals and antenna modification device Download PDFInfo
- Publication number
- EP1214752B1 EP1214752B1 EP00926895A EP00926895A EP1214752B1 EP 1214752 B1 EP1214752 B1 EP 1214752B1 EP 00926895 A EP00926895 A EP 00926895A EP 00926895 A EP00926895 A EP 00926895A EP 1214752 B1 EP1214752 B1 EP 1214752B1
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- EP
- European Patent Office
- Prior art keywords
- antenna
- monopole
- dipole
- signals
- modification device
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- 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.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/44—Resonant antennas with a plurality of divergent straight elements, e.g. V-dipole, X-antenna; with a plurality of elements having mutually inclined substantially straight portions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
-
- 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
- H01Q9/32—Vertical arrangement of element
-
- 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
- H01Q9/38—Vertical arrangement of element with counterpoise
Definitions
- the present invention relates to an antenna and especially on a universal antenna for reception of satellite signals and terrestrial signals, in particular is suitable for mobile use. Further relates The present invention relates to an antenna modification device to modify an existing monopole antenna.
- the reception field strengths of satellite signals in comparison to signals broadcast by terrestrial transmitters must be significantly lower when drafting and very much in the plastic structure of the receiving antenna Value for a maximum antenna gain in the direction of the satellite be placed.
- the elevation angle of a receiving antenna geostationary satellites between 30 ° and 60 ° depending on the Latitude at which the receiving antenna is located.
- the maximum gain of the receiving antenna should therefore be at 45 °.
- Usual vertical antennas for mobile reception which as so-called rod antennas are referred to, e.g. the classic ⁇ / 4 monopoly, have a system-related, theoretical, Zero at an elevation angle of 90 °, or an angle theta of 0 °.
- the maximum gain of these antennas at an elevation angle between 10 ° and 35 °.
- Above an elevation angle of The antenna gain quickly decreases by 35 °, which reduces the system reserve severely reduced in the case of satellite reception becomes. However, this can lead to loss of reception. Consequently are common automotive antennas for common reception terrestrial and satellite signals are not suitable.
- GB 2306252 A relates to a monopole type antenna, which has a plurality of conductive elements which via resistive elements with each other and with a feeding point are connected.
- US 5307078 A relates to a three-band antenna that a center conductor, one coaxial with the center conductor arranged first sleeve and one with respect to the central conductor has coaxially arranged second sleeve.
- US 5,173,713 A discloses an antenna that at least has two linear elements in a predetermined Angles are arranged to each other. Each of the antenna elements has at least one electrical resistance Establishment between two predetermined sections the same is arranged.
- the object of the present invention is a Antenna for receiving satellite signals and terrestrial Create signals at the loss of reception can be avoided with satellite reception.
- Another object of the present invention is an antenna modification device for modification existing monopoly antennas that enables to modify existing monopole antennas so that Eliminated or reduced reception losses in satellite reception could be.
- the present invention provides an antenna for reception of satellite signals and terrestrial signals that has a monopoly that has a first end that ends with a Feed point is connected, and has a second end.
- the antenna also has an unpowered dipole that is spaced apart from the second end of the monopoly in axial alignment is arranged to the monopoly.
- the monopoly is a ⁇ / 4 monopoly, while the dipole has a length in a range of ⁇ / 2 - 25% and ⁇ / 2 + 25%. Furthermore, the distance between the monopoly and the dipole is preferably less than ⁇ / 10.
- the dipole carries the arrangement of monopole and unpowered dipole as a purely passive element via a field coupling to the resulting Polar pattern, i.e. to the far field pattern, the Antenna at.
- the resulting directional characteristic shows a Maximum profit that is in the range of an elevation angle of 45 °.
- the antenna according to the invention is thus for reception of signals broadcast over geostationary satellites become, particularly suitable, so that reception losses can be eliminated or reduced.
- the present invention also provides an antenna modification device to modify a monopole antenna, which has a first end connected to a feed point and has a second end, the antenna modification device has a dipole and a connecting element.
- the connecting element serves to connect the dipole and of the monopoly such that the dipole is spaced apart from each other from the second end of the monopoly in axial alignment to the monopoly is arranged.
- a universal antenna for mobile reception of satellites and terrestrial signals such as can be attached to a car roof, explained in more detail.
- the antenna is preferably on a conductive Base area, for example a car roof 10, attached.
- a monopoly 12, which is preferably a ⁇ / 4 monopoly at its base where it is attached to the car roof 10 is connected to a feed point 14.
- Feed point 14 is, for example, a coaxial one Connection.
- the invention is now spaced from the second end of the monopole 12 a dipole 16 in the axial Alignment to the monopoly 12, being between the Monopoly 12 and the dipole 16 a distance 18 is provided.
- the length of the dipole is preferably between ⁇ / 2 minus 25% and ⁇ / 2 plus 25%, where ⁇ is the wavelength that the frequency is assigned to the signals to be received. In the most preferred case the length of the dipole is 16 ⁇ / 2.
- the distance 18 between the monopole 12 and the dipole 16 is preferably less than ⁇ / 10.
- the dipole 16 is not self-fed, but as a purely passive element, that does not have its own connection, via a field coupling to the resulting directional characteristic, which is shown in FIG. 2 is shown.
- the antenna arrangement according to the invention has with the result that the maximum profit 20 in one Range of an elevation angle of 45 ° is as by the Arrow 22 is shown in Fig. 2. Furthermore, from FIG see that the maximum gain in the range of an elevation angle of 45 ° about 6 dBi, i.e. 6 dB compared to an isotropic Spotlight. This guarantees optimal reception of satellite signals. As can also be seen in FIG. 2, the gain of the antenna decreases towards the footprint what however due to the already high reception field strengths of the terrestrial broadcast signals at an elevation angle hit the receiving antenna between 0 ° and 20 °, acceptable is.
- the absolute gain can as well the location of the maximum profit in relation to the base area, i.e. the elevation angle influences or optimizes it become.
- the antenna signals at a frequency of 2.34 GHz i.e. one wavelength ⁇ of 12.8 cm should be received is the monopoly 12 for example with a length of 3.2 cm and the dipole 16 with a length of 6.4 cm.
- the antenna is realized by the monopoly 12 and the dipole 16 is encased in a plastic sheath are, for example, for conventional monopoly automotive antennas is common. For example, the Spacing between monopole 12 and dipole 16 through plastic be assured.
- An antenna modification device is built up from a conventional monopole antenna an antenna according to the invention for reception of satellite signals and terrestrial signals.
- the antenna modification device according to the invention has a dipole, for example the dipole 16, which is shown in Fig. 1 corresponds.
- the Antenna modification device a connector (not shown) to the dipole and the conventional To combine monopoly so that they refer to the above have relationship to each other described in FIG. 1.
- at the connecting element can be, for example a receptacle or other device that is suitable for an element containing the dipole on the second end of a conventional monopoly, usually is clad with plastic.
Description
Die vorliegende Erfindung bezieht sich auf eine Antenne und insbesondere auf eine universelle Antenne für den Empfang von Satellitensignalen und terrestrischen Signalen, die insbesondere für einen mobilen Einsatz geeignet ist. Ferner bezieht sich die vorliegende Erfindung auf eine Antennenmodifikationsvorrichtung zum Modifizieren einer bestehenden Monopol-Antenne.The present invention relates to an antenna and especially on a universal antenna for reception of satellite signals and terrestrial signals, in particular is suitable for mobile use. Further relates The present invention relates to an antenna modification device to modify an existing monopole antenna.
In jüngerer Zeit bedienen sich immer mehr Dienste geostationärer Satelliten zur Austrahlung von Radiosignalen, Fernsehsignalen oder anderen Signalen. Dabei besteht die Tendenz dazu, hybride Lösungen zu realisieren, d.h. Systeme, bei denen Signale gleichzeitig sowohl über Satellit als auch über terrestrische Sender ausgestrahlt werden. Durch eine solche Vorgehensweise können die Vorteile beider Varianten kombiniert werden.In recent times, more and more services are using geostationaries Satellite for broadcasting radio signals, television signals or other signals. There is a tendency to implement hybrid solutions, i.e. Systems where Signals simultaneously both via satellite and via terrestrial channels are broadcast. By such Approach can combine the advantages of both variants become.
Da die Empfangsfeldstärken von Satellitensignalen im Vergleich zu Signalen, die von terrestrischen Sendern ausgestrahlt werden, wesentlich geringer sind, muß beim Entwurf und beim plastischen Aufbau der Empfangsantenne sehr viel Wert auf einen maximalen Antennengewinn in Richtung des Satelliten gelegt werden. In der nördlichen Hemisphäre beträgt beispielsweise der Elevationswinkel einer Empfangsantenne zu geostationären Satelliten zwischen 30° und 60° abhängig vom Breitengrad, an dem sich die Empfangsantenne befindet. Beim Empfang von Signalen, die über geostationäre Satelliten ausgestrahlt werden, sollte daher das Gewinnmaximum der Empfangsantenne bei 45° liegen.Because the reception field strengths of satellite signals in comparison to signals broadcast by terrestrial transmitters must be significantly lower when drafting and very much in the plastic structure of the receiving antenna Value for a maximum antenna gain in the direction of the satellite be placed. In the northern hemisphere is for example the elevation angle of a receiving antenna geostationary satellites between 30 ° and 60 ° depending on the Latitude at which the receiving antenna is located. At the Receiving signals broadcast over geostationary satellites should therefore be the maximum gain of the receiving antenna be at 45 °.
Übliche vertikale Antennen für den mobilen Empfang, die als sogenannte Stabantennen bezeichnet werden, wie z.B. der klassische λ/4-Monopol, besitzen systembedingt eine, theoretische, Nullstelle bei einem Elevationswinkel von 90°, bzw. einem Winkel Theta von 0°. Durch den Einfluß einer endlichen elektrischen Leitfähigkeit sowie von Verlusten in der metallischen Grundfläche, beispielsweise dem Autodach, liegt das Gewinnmaximum dieser Antennen bei einem Elevationswinkel zwischen 10° und 35°. Oberhalb eines Elevationswinkels von 35° nimmt der Antennengewinn rasch ab, wodurch die Systemreserve im Falle eines Satellitenempfangs stark geschmälert wird. Dies kann jedoch zu Empfangsverlusten führen. Somit sind übliche Automobilantennen für den gemeinsamen Empfang von terrestrischen Signalen und Satellitensignalen nicht geeignet.Usual vertical antennas for mobile reception, which as so-called rod antennas are referred to, e.g. the classic λ / 4 monopoly, have a system-related, theoretical, Zero at an elevation angle of 90 °, or an angle theta of 0 °. By the influence of a finite electrical conductivity and losses in the metallic base, such as the car roof the maximum gain of these antennas at an elevation angle between 10 ° and 35 °. Above an elevation angle of The antenna gain quickly decreases by 35 °, which reduces the system reserve severely reduced in the case of satellite reception becomes. However, this can lead to loss of reception. Consequently are common automotive antennas for common reception terrestrial and satellite signals are not suitable.
Die GB 2306252 A bezieht sich auf eine Antenne vom Monopoltyp, die eine Mehrzahl leitfähiger Elemente aufweist, die über resistive Elemente untereinander und mit einem Speisungspunkt verbunden sind.GB 2306252 A relates to a monopole type antenna, which has a plurality of conductive elements which via resistive elements with each other and with a feeding point are connected.
Die US 5307078 A bezieht sich auf eine Dreibandantenne, die einen Mittelleiter, eine bezüglich des Mittelleiters koaxial angeordnete erste Hülse und eine bezüglich des Mittelleiters koaxial angeordnete zweite Hülse aufweist.US 5307078 A relates to a three-band antenna that a center conductor, one coaxial with the center conductor arranged first sleeve and one with respect to the central conductor has coaxially arranged second sleeve.
Die US 5,173,713 A offenbart eine Antenne, die zumindest zwei lineare Elemente aufweist, die in einem vorbestimmten Winkel zueinander angeordnet sind. Jedes der Antennenelemente weist zumindest eine elektrische widerstandsbehaftete Einrichtung auf, die zwischen zwei vorbestimmten Abschnitten desselben angeordnet ist.US 5,173,713 A discloses an antenna that at least has two linear elements in a predetermined Angles are arranged to each other. Each of the antenna elements has at least one electrical resistance Establishment between two predetermined sections the same is arranged.
Die Aufgabe der vorliegenden Erfindung besteht darin, eine Antenne für den Empfang von Satellitensignalen und terrestrischen Signalen zu schaffen, bei der Empfangsverluste beim Satellitenempfang vermieden werden können.The object of the present invention is a Antenna for receiving satellite signals and terrestrial Create signals at the loss of reception can be avoided with satellite reception.
Diese Aufgabe wird durch eine Antenne gemäß Anspruch 1 gelöst. Eine weitere Aufgabe der vorliegenden Erfindung besteht darin, eine Antennenmodifikationsvorrichtung zum Modifizieren bestehender Monopol-Antennen zu schaffen, die es ermöglicht, bestehende Monopol-Antennen dahingehend zu modifizieren, daß Empfangsverluste beim Satellitenempfang beseitigt bzw. reduziert sein können.This object is achieved by an antenna according to claim 1. Another object of the present invention is an antenna modification device for modification existing monopoly antennas that enables to modify existing monopole antennas so that Eliminated or reduced reception losses in satellite reception could be.
Diese Aufgabe wird durch eine Antennenmodifikationsvorrichtung nach Anspruch 7 gelöst.This task is accomplished by an antenna modification device solved according to claim 7.
Die vorliegende Erfindung schafft eine Antenne für den Empfang von Satellitensignalen und terrestrischen Signalen, die einen Monopol aufweist, der ein erstes Ende, das mit einem Speisepunkt verbunden ist, und ein zweites Ende aufweist. Die Antenne besitzt ferner einen ungespeisten Dipol, der beabstandet von dem zweiten Ende des Monopols in axialer Ausrichtung zu dem Monopol angeordnet ist.The present invention provides an antenna for reception of satellite signals and terrestrial signals that has a monopoly that has a first end that ends with a Feed point is connected, and has a second end. The antenna also has an unpowered dipole that is spaced apart from the second end of the monopoly in axial alignment is arranged to the monopoly.
Bei bevorzugten Ausführungsbeispielen der vorliegenden Erfindung ist der Monopol ein λ/4-Monopol, während der Dipol eine Länge in einem Bereich von λ/2 - 25% und λ/2 + 25% besitzt. Ferner beträgt der Abstand zwischen Monopol und Dipol vorzugsweise weniger als λ/10. Durch die erfindungsgemäße Anordnung von Monopol und ungespeistem Dipol trägt der Dipol als rein passives Element über eine Feldkopplung zur resultierenden Richtcharakteristik, d.h. zum Fernfeldmuster, der Antenne bei. Die resultierende Richtcharakteristik zeigt ein Gewinnmaximum, das im Bereich eines Elevationswinkels von 45° liegt. Somit ist die erfindungsgemäße Antenne zum Empfang von Signalen, die über geostationäre Satelliten ausgestrahlt werden, vorzüglich geeignet, so daß Empfangsverluste beseitigt bzw. reduziert sein können.In preferred embodiments of the present invention the monopoly is a λ / 4 monopoly, while the dipole has a length in a range of λ / 2 - 25% and λ / 2 + 25%. Furthermore, the distance between the monopoly and the dipole is preferably less than λ / 10. By the invention The dipole carries the arrangement of monopole and unpowered dipole as a purely passive element via a field coupling to the resulting Polar pattern, i.e. to the far field pattern, the Antenna at. The resulting directional characteristic shows a Maximum profit that is in the range of an elevation angle of 45 °. The antenna according to the invention is thus for reception of signals broadcast over geostationary satellites become, particularly suitable, so that reception losses can be eliminated or reduced.
Die vorliegende Erfindung schafft ferner eine Antennenmodifikationsvorrichtung zum Modifizieren einer Monopol-Antenne, die ein mit einem Speisepunkt verbundenes erstes Ende und ein zweites Ende aufweist, wobei die Antennenmodifikationsvorrichtung einen Dipol und ein Verbindungselement besitzt. Das Verbindungselement dient zum Verbinden des Dipols und des Monopols derart, daß der Dipol ungespeist beabstandet von dem zweiten Ende des Monopols in axialer Ausrichtung zum dem Monopol angeordnet ist. Somit ermöglicht die vorliegende Erfindung das Modifizieren bestehender Monopol-Antennen, um einen Satellitenempfang ohne merkliche Empfangsverluste realisieren zu können.The present invention also provides an antenna modification device to modify a monopole antenna, which has a first end connected to a feed point and has a second end, the antenna modification device has a dipole and a connecting element. The connecting element serves to connect the dipole and of the monopoly such that the dipole is spaced apart from each other from the second end of the monopoly in axial alignment to the monopoly is arranged. Thus, the present enables Invention Modifying Existing Monopole Antennas To realize a satellite reception without noticeable loss of reception to be able to.
Bevorzugte Ausführungsbeispiele der vorliegenden Erfindung werden nachfolgend bezugnehmend auf die beiliegenden Zeichnungen näher erläutert. Es zeigen:
- Fig. 1
- eine schematische Darstellung eines Ausführungsbeispiels einer erfindungsgemäßen Antenne für den Empfang von Satellitensignalen und terrestrischen Signalen; und
- Fig. 2
- eine Richtcharakteristik der in Fig. 1 dargestellten Antenne.
- Fig. 1
- is a schematic representation of an embodiment of an antenna according to the invention for the reception of satellite signals and terrestrial signals; and
- Fig. 2
- a directional characteristic of the antenna shown in Fig. 1.
Bezugnehmend auf Fig. 1 wird nun der prinzipielle Aufbau
einer universellen Antenne für den mobilen Empfang von Satelliten
und terrestrischen Signalen, wie sie beispielsweise
auf einem Autodach angebracht sein kann, näher erläutert.
Die Antenne wird dabei vorzugsweise auf einer leitfähigen
Grundfläche, beispielsweise einem Autodach 10, angebracht.
Ein Monopol 12, der vorzugsweise eine λ/4-Monopol ist, ist
an seinem Fußpunkt, an dem derselbe an dem Autodach 10 angebracht
ist, mit einem Speisepunkt 14 verbunden. Bei dem
Speisepunkt 14 handelt es sich beispielsweise um einen koaxialen
Anschluß. Erfindungsgemäß ist nun beabstandet von
dem zweiten Ende des Monopols 12 ein Dipol 16 in axialer
Ausrichtung zu dem Monopol 12 angeordnet, wobei zwischen dem
Monopol 12 und dem Dipol 16 ein Abstand 18 vorgesehen ist.
Die Länge des Dipols beträgt vorzugsweise zwischen λ/2 minus
25% und λ/2 plus 25%, wobei λ die Wellenlänge, die der Frequenz
der zu empfangenden Signale zugeordnet ist, ist. Im am
meisten bevorzugten Fall beträgt die Länge des Dipols 16
λ/2. Der Abstand 18 zwischen dem Monopol 12 und dem Dipol 16
ist vorzugsweise kleiner als λ/10.Referring now to Fig. 1, the basic structure
a universal antenna for mobile reception of satellites
and terrestrial signals, such as
can be attached to a car roof, explained in more detail.
The antenna is preferably on a conductive
Base area, for example a
Wie in Fig. 1 zu erkennen ist, wird der Dipol 16 nicht
selbst gespeist, sondern trägt als rein passives Element,
das keinen eigenen Anschluß besitzt, über eine Feldkopplung
zur resultierenden Richtcharakteristik bei, die in Fig. 2
dargestellt ist.As can be seen in Fig. 1, the
Wie in Fig. 2 zu erkennen ist, hat die erfindungsgemäße Antennenanordnung
zur Folge, daß das Gewinnmaximum 20 in einem
Bereich eines Elevationswinkels von 45° liegt, wie durch den
Pfeil 22 in Fig. 2 angezeigt ist. Ferner ist aus Fig. 2 zu
sehen, daß das Gewinnmaximum im Bereich eines Elevationswinkel
von 45° etwa 6 dBi, also 6 dB gegenüber einem isotropen
Strahler, beträgt. Dies garantiert einen optimalen Empfang
von Satellitensignalen. Wie ferner in Fig. 2 zu sehen ist,
nimmt der Gewinn der Antenne in Richtung Grundfläche ab, was
jedoch aufgrund der ohnehin hohem Empfangsfeldstärken der
terrestrischen Sendesignale, die in einem Elevationswinkel
zwischen 0° und 20° auf die Empfangsantenne treffen, akzeptabel
ist.As can be seen in FIG. 2, the antenna arrangement according to the invention has
with the result that the
Durch eine Variation der Länge des Dipols 16, beispielsweise
zwischen λ/2 - 25% und λ/2 + 25%, kann der Absolutgewinn sowie
die Lage des Gewinnmaximums bezüglich der Grundfläche,
d.h. der Elevationswinkel desselben beeinflußt bzw. optimiert
werden.By varying the length of the
Bei einem Ausführungsbeispiel, bei dem mit der Antenne Signale
bei einer Frequenz von 2,34 GHz, d.h. einer Wellenlänge
λ von 12,8 cm, empfangen werden sollen, ist der Monopol
12 beispielsweise mit einer Länge von 3,2 cm und der Dipol
16 mit einer Länge von 6,4 cm zu realisieren.In one embodiment, in which the antenna signals
at a frequency of 2.34 GHz, i.e. one wavelength
λ of 12.8 cm should be received is the
Bei einem bevorzugten Ausführungsbeispiel der vorliegenden
Erfindung wird die Antenne realisiert, indem der Monopol 12
und der Dipol 16 in eine Kunststoffumhüllung eingekleidet
sind, wie es beispielsweise für herkömmliche Monopol-Automobilantennen
üblich ist. Dabei kann beispielsweise auch die
Beabstandung zwischen Monopol 12 und Dipol 16 durch Kunststoff
sichergestellt sein.In a preferred embodiment of the present
Invention, the antenna is realized by the
Eine Antennenmodifikationsvorrichtung gemäß der vorliegenden
Erfindung ist aufgebaut, um aus einer herkömmlichen Monopol-Antenne
eine erfindungsgemäße Antenne für den Empfang
von Satellitensignalen und terrestrischen Signalen herzustellen.
Dazu besitzt die erfindungsgemäße Antennenmodifikationsvorrichtung
einen Dipol, der beispielsweise dem Dipol
16, der in Fig. 1 gezeigt ist, entspricht. Ferner weist die
Antennenmodifikationsvorrichtung ein Verbindungselement
(nicht dargestellt) auf, um den Dipol und den herkömmlichen
Monopol so zu verbinden, daß dieselben die oben bezugnehmend
auf Fig. 1 beschriebene Beziehung zueinander aufweisen. Bei
dem Verbindungselement kann es sich dabei beispielsweise um
eine Steckhülse oder um eine andere Vorrichtung handeln, die
dazu geeignet ist, ein den Dipol enthaltendes Element an dem
zweiten Ende eines herkömmlichen Monopols, der üblicherweise
mit Kunststoff verkleidet ist, zu befestigen. Somit können
erfindungsgemäß übliche Monopolantennen aufgerüstet werden,
um einen störungsfreien Empfang von Satellitensignalen zu
ermöglichen. Somit müssen herkömmliche Monopolantennen nicht
vollständig durch die erfindungsgemäße Antenne ersetzt werden,
sondern können durch die erfindungsgemäße Antennenmodifikationsvorrichtung
aufgerüstet werden, was eine beträchtliche
Kosteneinsparung darstellt.An antenna modification device according to the present
Invention is built up from a conventional monopole antenna
an antenna according to the invention for reception
of satellite signals and terrestrial signals.
For this purpose, the antenna modification device according to the invention has
a dipole, for example the
Claims (9)
- Antenna for receiving satellite signals and terrestrial signals, comprising:characterized bya monopole (12) having a first end, which is connected to a feeding point (14), and a second end;
an unfed dipole (16) which is arranged in spaced relationship with the second end of the monopole (12) and in axial alignment with said monopole and which contributes to the directional pattern of the antenna via a field coupling. - Antenna according to claim 1, wherein the monopole (12) is a λ/4 monopole, λ being the wavelength of the signals to be received.
- Antenna according to claim 2, wherein the dipole has a length in the range between λ/2 - 25% and λ/2 + 25%.
- Antenna according to one of the claims 1 to 3, wherein the monopole (12) is arranged such that a conductive surface (10) is arranged below the first end.
- Antenna according to one of the claims 1 to 4, wherein the feeding point (14) is a coaxial connection.
- Antenna according to one of the claims 1 to 5, wherein the distance between said monopole (12) and said dipole (16) is smaller than λ/10, λ being the wavelength of the signals to be received.
- Antenna modification device for modifying a monopole antenna having a first end, which is connected to a feeding point, and a second end, said antenna modification device comprising:a dipole; anda connection element for connecting the dipole and the monopole such that the dipole is unfed and arranged in spaced relationship with the second end of the monopole as well as in axial alignment with said monopole, said dipole contributing to the directional pattern of the antenna via a field coupling.
- Antenna modification device according to claim 7 for modifying a λ/4 monopole antenna, wherein the dipole has a length in a range between λ/2 - 25% and λ/2 + 25%, λ being the wavelength of the signal to be received.
- Antenna modification device according to claim 8, wherein the connection element is implemented such that, when the dipole and the monopole have been connected, the distance between the monopole and the dipole is smaller than λ/10.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19944505A DE19944505C2 (en) | 1999-09-16 | 1999-09-16 | Antenna for the reception of satellite signals and terrestrial signals and antenna modification device |
| DE19944505 | 1999-09-16 | ||
| PCT/EP2000/003293 WO2001020721A1 (en) | 1999-09-16 | 2000-04-12 | Antenna for receiving satellite signals and terrestrial signals and antenna modification device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1214752A1 EP1214752A1 (en) | 2002-06-19 |
| EP1214752B1 true EP1214752B1 (en) | 2003-05-28 |
Family
ID=7922303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00926895A Expired - Lifetime EP1214752B1 (en) | 1999-09-16 | 2000-04-12 | Antenna for receiving satellite signals and terrestrial signals and antenna modification device |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6633263B2 (en) |
| EP (1) | EP1214752B1 (en) |
| DE (2) | DE19944505C2 (en) |
| HK (1) | HK1046332B (en) |
| WO (1) | WO2001020721A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7420521B2 (en) * | 2007-01-08 | 2008-09-02 | Applied Radar Inc. | Wideband segmented dipole antenna |
| US20080169988A1 (en) * | 2007-01-16 | 2008-07-17 | Deaett Michael A | Lightweight, conformal, wideband airframe antenna |
| DE102009015699A1 (en) * | 2008-10-30 | 2010-05-06 | Rohde & Schwarz Gmbh & Co. Kg | Broadband antenna |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4479130A (en) * | 1981-06-05 | 1984-10-23 | Snyder Richard D | Broadband antennae employing coaxial transmission line sections |
| GB2148604B (en) * | 1983-10-18 | 1988-01-06 | Plessey Co Plc | Monopole aerial |
| DE3826777A1 (en) * | 1988-08-06 | 1990-02-08 | Kathrein Werke Kg | Axial two-band antenna |
| US5173713A (en) * | 1991-01-14 | 1992-12-22 | Laboratorie D'etudes Et De Researches Chimiques (Lerc) S.A. | Three element inverted conical monopole with series inductance and resistance in each element |
| US5307078A (en) * | 1992-03-26 | 1994-04-26 | Harada Kogyo Kabushiki Kaisha | AM-FM-cellular mobile telephone tri-band antenna with double sleeves |
| US5798736A (en) * | 1995-03-28 | 1998-08-25 | Mcdonnell Douglas Corporation | Antenna system having a plurality of fundamental resonances |
| GB2306252B (en) * | 1995-10-10 | 2000-05-10 | Edward Charles Forster | Self-terminated travelling wave antenna |
| FR2758012B1 (en) * | 1996-12-27 | 1999-05-28 | Thomson Csf | DOUBLE ANTENNA, PARTICULARLY FOR VEHICLE |
| JPH11308038A (en) | 1998-04-20 | 1999-11-05 | Yokowo Co Ltd | Antenna and antenna device |
| US6337667B1 (en) * | 2000-11-09 | 2002-01-08 | Rangestar Wireless, Inc. | Multiband, single feed antenna |
-
1999
- 1999-09-16 DE DE19944505A patent/DE19944505C2/en not_active Expired - Fee Related
-
2000
- 2000-04-12 WO PCT/EP2000/003293 patent/WO2001020721A1/en active IP Right Grant
- 2000-04-12 EP EP00926895A patent/EP1214752B1/en not_active Expired - Lifetime
- 2000-04-12 DE DE50002387T patent/DE50002387D1/en not_active Expired - Lifetime
-
2002
- 2002-03-04 US US10/090,402 patent/US6633263B2/en not_active Expired - Lifetime
- 2002-10-30 HK HK02107878.0A patent/HK1046332B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| US20020089460A1 (en) | 2002-07-11 |
| DE19944505C2 (en) | 2001-10-18 |
| US6633263B2 (en) | 2003-10-14 |
| DE50002387D1 (en) | 2003-07-03 |
| HK1046332B (en) | 2003-10-17 |
| WO2001020721A1 (en) | 2001-03-22 |
| DE19944505A1 (en) | 2001-04-19 |
| HK1046332A1 (en) | 2003-01-03 |
| EP1214752A1 (en) | 2002-06-19 |
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