EP1515393B1 - Dual-band antenna for DVB-T reception - Google Patents

Dual-band antenna for DVB-T reception Download PDF

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Publication number
EP1515393B1
EP1515393B1 EP04020578A EP04020578A EP1515393B1 EP 1515393 B1 EP1515393 B1 EP 1515393B1 EP 04020578 A EP04020578 A EP 04020578A EP 04020578 A EP04020578 A EP 04020578A EP 1515393 B1 EP1515393 B1 EP 1515393B1
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EP
European Patent Office
Prior art keywords
antenna
standing wave
frequency range
cable
wave trap
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
Application number
EP04020578A
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German (de)
French (fr)
Other versions
EP1515393A1 (en
Inventor
Wolfgang Wendel
Ralf Epple
Sandhya Schmid
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hirschmann Electronics GmbH and Co KG
Hirschmann Electronics GmbH
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Hirschmann Electronics GmbH and Co KG
Hirschmann Electronics GmbH
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Publication of EP1515393A1 publication Critical patent/EP1515393A1/en
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Publication of EP1515393B1 publication Critical patent/EP1515393B1/en
Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
    • H01Q1/46—Electric supply lines or communication lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • 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
    • 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
    • H01Q5/328—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 between a radiating element and ground
    • 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
    • H01Q5/335—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 at the feed, e.g. for impedance matching
    • 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

Definitions

  • the invention relates to an antenna device for signal reception, in particular for the reception of digital television signals, according to the features of the preamble of patent claim 1.
  • Such an antenna is off US-A-5977920 known.
  • an antenna device for signal reception in particular for the reception of digital television signals known.
  • This antenna device comprises an antenna with an antenna structure that is tuned to the frequency range to be received. At the base of the antenna structure, the received signals are coupled out and fed via a cable to a signal processing device.
  • a standing wave trap which is connected downstream of the base of an antenna in order to effectively suppress the generation of high-frequency power on the outer conductor of the antenna cable.
  • the aforementioned prior art thus provides a single antenna device which is tuned to a predefinable frequency range. Should be with an antenna, as from the DE 102 20 670.8 is known, more frequency ranges are received, a separate antenna or tuned antenna structure is required for each additional frequency range. This increases the construction costs of the entire antenna device.
  • the invention is therefore based on the object to provide an antenna device, in particular an antenna device for the signal reception of digital television signals, with the simple means in addition to the frequency range that can be received with the antenna, at least one further frequency range can be received.
  • the structure of such an antenna device according to the invention has several advantages.
  • the antenna or the antenna structure can be optimally tuned to the reception of a first frequency range.
  • the received signals are fed at the base of the antenna or the antenna structure via a first standing wave block in the antenna cable and fed to the signal processing device.
  • the first standing wave barrier With the first standing wave barrier, the generation of high-frequency power on the antenna cable or the outer conductor of the antenna cable is effectively suppressed.
  • the first standing wave barrier is followed by another standing wave barrier, which causes the antenna cable, in particular the outer conductor of a coaxial cable, to act as an antenna for the at least further frequency range between the two standing wave barriers.
  • the further standing wave blocking is dimensioned such that it acts only selectively in this frequency range to be received and frequency ranges above and / or below this frequency range are not damped thereby.
  • the antenna or the antenna structure is designed to receive signals in the UHF range (frequency range from 470 to 860 megahertz).
  • the standing wave barrier which is connected downstream of the base of the antenna structure, attenuates the UHF band. From this first standing wave blocking another frequency range (eg VHF, 170 to 230 megahertz) is not damped.
  • the antenna cable which is bounded by an at least further standing wave block for VHF, additionally receives VHF on the outer conductor (if the antenna cable is a coaxial cable, for example) and feeds the received signal via the first standing wave barrier, which does not attenuate VHF, into the Inner conductor of the antenna cable.
  • a further frequency range can be received solely by the use of a further standing wave barrier, without structural, structural or additional measures being required on the antenna of the antenna device.
  • the second sheath wave barrier thus causes so that the existing antenna cable acts as another antenna for the wider frequency range.
  • the figure shows an antenna device 1, which has an antenna 2 (or an antenna structure), as for example from the DE 102 20 670.8 is known.
  • the antenna 2 which may also be antennas other than planar surfaces, is tuned to the frequency range to be received, for example UHF in the frequency range of 470 to 860 megahertz.
  • a ground 3 ground plane or the like
  • the signals received from the antenna 2 at the root 4 are fed to a cable (antenna cable such as a coaxial cable having an inner conductor and an outer conductor) , About this cable 5, the received signals to a signal processing device 6 (such as a receiver, TV or the like).
  • the foot point 4 of the antenna 2 is followed by a first standing wave trap 7, which attenuates the frequency range received by the antenna 2 (here, for example, UHF 470 to 860 megahertz).
  • the frequency ranges below and / or above this first frequency range (UHF), however, are not attenuated.
  • a further, second standing wave blocking device 8 is provided between the first standing wave blocking device 7 and the signal processing device 6.
  • This further standing wave blocking device 8 causes a further frequency range (eg VHF 170 to 230 megahertz) to be additionally received via the outer conductor of the cable 5 and the received signal to be transmitted to the inner conductor of the first waveguide barrier 7 which does not attenuate the second frequency range Cable 5 is fed.
  • a further frequency range eg VHF 170 to 230 megahertz
  • VHF frequency range 170 to 230 megahertz
  • the antenna device 1 As shown in the figure, a simple and cost-effective way to be able to receive at least two frequency ranges can be provided without the need for two antennas 2 tuned to these frequency ranges.
  • the antenna cable which is required in any case, acts as an antenna for the at least second frequency range.
  • the aforementioned frequency ranges (UHF, VHF) are exemplary and are intended to illustrate the invention without being limited thereto.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Details Of Aerials (AREA)

Abstract

A UHF range antenna comprises a planar surface (2) connected to the inner conductor of a coaxial antenna feed cable and a grounded part (3) connected to its outer screen. Two trap devices (7, 8), one adjacent the antenna and the other a specific distance along the feeder towards a receiver (6) isolate the coaxial cable screen so that it acts as an antenna in the VHF range. The received VHF signals are coupled to the inner conductor of the cable at the receiver end.

Description

Die Erfindung betrifft eine Antenneneinrichtung für den Signalempfang, insbesondere zum Empfang von digitalen Fernsehsignalen, gemäß den Merkmalen des Oberbegriffs des Patentanspruchs 1.The invention relates to an antenna device for signal reception, in particular for the reception of digital television signals, according to the features of the preamble of patent claim 1.

Eine derartige Antenne ist aus US-A-5977920 bekannt.Such an antenna is off US-A-5977920 known.

Aus der nicht vorveröffentlichten DE 102 20 670.8 ist eine Antenneneinrichtung für den Signalempfang, insbesondere zum Empfang von digitalen Fernsehsignalen, bekannt. Diese Antenneneinrichtung umfaßt eine Antenne mit einer Antennenstruktur, die auf den zu empfangenen Frequenzbereich abgestimmt ist. An dem Fußpunkt der Antennenstruktur werden die empfangenen Signale ausgekoppelt und über ein Kabel einem signalverarbeitenden Gerät zugeführt.From the not pre-published DE 102 20 670.8 is an antenna device for signal reception, in particular for the reception of digital television signals known. This antenna device comprises an antenna with an antenna structure that is tuned to the frequency range to be received. At the base of the antenna structure, the received signals are coupled out and fed via a cable to a signal processing device.

Aus der ebenfalls nicht vorveröffentlichten DE 102 20 669.4 ist eine Mantelwellensperre bekannt, die dem Fußpunkt einer Antenne nachgeschaltet ist, um wirksam die Entstehung von Hochfrequenzleistungen auf dem Außenleiter des Antennenkabels zu unterdrücken.From the also not pre-published DE 102 20 669.4 is known a standing wave trap, which is connected downstream of the base of an antenna in order to effectively suppress the generation of high-frequency power on the outer conductor of the antenna cable.

Der vorgenannte Stand der Technik stellt also eine einzige Antenneneinrichtung bereit, die auf einen vorgebbaren Frequenzbereich abgestimmt ist. Sollen bei einer Antenne, wie sie aus der DE 102 20 670.8 bekannt ist, weitere Frequenzbereiche empfangen werden, ist für jeden weiteren Frequenzbereich eine eigene Antenne bzw. darauf abgestimmte Antennenstruktur erforderlich. Dies erhöht den baulichen Aufwand der gesamten Antenneneinrichtung.The aforementioned prior art thus provides a single antenna device which is tuned to a predefinable frequency range. Should be with an antenna, as from the DE 102 20 670.8 is known, more frequency ranges are received, a separate antenna or tuned antenna structure is required for each additional frequency range. This increases the construction costs of the entire antenna device.

Der Empfang von weiteren Frequenzbereichen neben dem eigentlichen Frequenzbereich, auf den die Antenne der DE 102 20 669.4 abgestimmt ist, ist bei der hieraus bekannten Antenneneinrichtung nicht möglich, da aufgrund der dem Fußpunkt der Antenne nachgeschalteten Mantelwellensperre der Empfang weiterer Frequenzbereiche nicht möglich ist.The reception of additional frequency ranges in addition to the actual frequency range to which the antenna of the DE 102 20 669.4 is tuned in is the antenna device known therefrom is not possible, since the reception of further frequency ranges is not possible on account of the standing wave barrier connected downstream of the base of the antenna.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Antenneneinrichtung bereitzustellen, insbesondere eine Antenneneinrichtung für den Signalempfang von digitalen Fernsehsignalen, mit der mit einfachen Mitteln neben dem Frequenzbereich, der mit der Antenne empfangen werden kann, zumindest ein weiterer Frequenzbereich empfangen werden kann.The invention is therefore based on the object to provide an antenna device, in particular an antenna device for the signal reception of digital television signals, with the simple means in addition to the frequency range that can be received with the antenna, at least one further frequency range can be received.

Diese Aufgabe ist durch die Merkmale des Patentanspruchs 1 gelöst.This object is solved by the features of patent claim 1.

Erfindungsgemäß ist vorgesehen, daß zwischen der Mantelwellensperre, die den Fußpunkt der Antenne bzw. der Antennenstruktur nachgeschaltet ist, und dem signalverarbeitenden Gerät zumindest eine weitere Mantelwellensperre vorgesehen ist und der Bereich des Kabels zwischen der dem Fußpunkt der Antenne nachgeschalteten Mantelwellensperre und der zumindest weiteren Mantelwellensperre als Antenne für zumindest einen weiteren Frequenzbereich wirkt. Der Aufbau einer solchen erfindungsgemäßen Antenneneinrichtung hat mehrere Vorteile. Zunächst kann die Antenne bzw. die Antennenstruktur optimal auf den Empfang eines ersten Frequenzbereiches abgestimmt werden. Die empfangenen Signale werden am Fußpunkt der Antenne bzw. der Antennenstruktur über eine erste Mantelwellensperre in das Antennenkabel eingespeist und dem signalverarbeitenden Gerät zugeführt. Mit der ersten Mantelwellensperre wird wirksam die Entstehung von Hochfrequenzleistungen auf dem Antennenkabel, bzw. dem Außenleiter des Antennenkabels, unterdrückt. Ergänzend hierzu ist der ersten Mantelwellensperre eine weitere Mantelwellensperre nachgeschaltet, die bewirkt, daß das Antennenkabel, insbesondere der Außenleiter eines Koaxialkabels, zwischen den beiden Mantelwellensperren als Antenne für den zumindest weiteren Frequenzbereich wirkt. Dabei ist die weitere Mantelwellensperre so dimensioniert, daß sie nur selektiv in diesem zu empfangenen Frequenzbereich wirkt und Frequenzbereiche oberhalb und/oder unterhalb dieses Frequenzbereiches dadurch nicht bedämpft werden. Durch das Einfügen einer an sich bekannten Mantelwellensperre, wobei es auf die Bauart der Mantelwellensperre nicht ankommt, im Bereich des Kabels zwischen der dem Fußpunkt der Antenne nachgeschalteten Mantelwellensperre und dem signalverarbeitenden Gerät wirkt das Antennenkabel an sich als Antenne für einen weiteren Frequenzbereich, neben dem Frequenzbereich, der an sich von der schon vorhandenen Antenne bzw. der Antennenstruktur empfangen wird. So ist beispielsweise die Antenne bzw. die Antennenstruktur so ausgebildet, daß sie Signale im UHF-Bereich (Frequenzbereich von 470 bis 860 Megahertz) empfängt. Dabei bedämpft die Mantelwellensperre, die dem Fußpunkt der Antennenstruktur nachgeschaltet ist, das UHF-Band. Von dieser ersten Mantelwellensperre wird ein weiterer Frequenzbereich (z. B. VHF, 170 bis 230 Megahertz) nicht bedämpft. Das Antennenkabel, welches durch eine zumindest weitere Mantelwellensperre für VHF begrenzt wird, empfängt auf dem Außenleiter (wenn es sich bei dem Antennenkabel um ein Koaxialkabel beispielsweise handelt) zusätzlich VHF und speist das empfangene Signal über die erste Mantelwellensperre, welche VHF nicht bedämpft, in den Innenleiter des Antennenkabels ein. So kann alleine durch den Einsatz einer weiteren Mantelwellensperre ein weiterer Frequenzbereich empfangen werden, ohne daß bauliche, strukturelle oder zusätzliche Maßnahmen an der Antenne der Antenneneinrichtung erforderlich sind. Die zweite Mantelwellensperre bewirkt also damit, daß das an sich vorhandene Antennenkabel als weitere Antenne für den weiteren Frequenzbereich fungiert.According to the invention it is provided that between the standing wave barrier, which is connected to the base of the antenna or the antenna structure, and the signal processing device at least one further standing wave blocking is provided and the area of the cable between the bottom of the antenna downstream standing wave barrier and the at least another standing wave block as Antenna acts for at least one other frequency range. The structure of such an antenna device according to the invention has several advantages. First, the antenna or the antenna structure can be optimally tuned to the reception of a first frequency range. The received signals are fed at the base of the antenna or the antenna structure via a first standing wave block in the antenna cable and fed to the signal processing device. With the first standing wave barrier, the generation of high-frequency power on the antenna cable or the outer conductor of the antenna cable is effectively suppressed. In addition to this, the first standing wave barrier is followed by another standing wave barrier, which causes the antenna cable, in particular the outer conductor of a coaxial cable, to act as an antenna for the at least further frequency range between the two standing wave barriers. In this case, the further standing wave blocking is dimensioned such that it acts only selectively in this frequency range to be received and frequency ranges above and / or below this frequency range are not damped thereby. By inserting a known standing wave barrier, which does not depend on the design of the standing wave barrier, In the region of the cable between the sheath wave barrier connected downstream of the base of the antenna and the signal processing device, the antenna cable itself acts as an antenna for a further frequency range, next to the frequency range which is received by the already existing antenna or antenna structure. For example, the antenna or the antenna structure is designed to receive signals in the UHF range (frequency range from 470 to 860 megahertz). At the same time, the standing wave barrier, which is connected downstream of the base of the antenna structure, attenuates the UHF band. From this first standing wave blocking another frequency range (eg VHF, 170 to 230 megahertz) is not damped. The antenna cable, which is bounded by an at least further standing wave block for VHF, additionally receives VHF on the outer conductor (if the antenna cable is a coaxial cable, for example) and feeds the received signal via the first standing wave barrier, which does not attenuate VHF, into the Inner conductor of the antenna cable. Thus, a further frequency range can be received solely by the use of a further standing wave barrier, without structural, structural or additional measures being required on the antenna of the antenna device. The second sheath wave barrier thus causes so that the existing antenna cable acts as another antenna for the wider frequency range.

Ein Ausführungsbeispiel der erfindunsgemäßen Antenneneinrichtung, auf das diese jedoch nicht beschränkt ist, ist in der Figur gezeigt und im folgenden beschrieben.An embodiment of the antenna device according to the invention, to which this is not limited, is shown in the figure and described below.

Die Figur zeigt eine Antenneneinrichtung 1, die eine Antenne 2 (oder eine Antennenstruktur) aufweist, wie sie beispielsweise aus der DE 102 20 670.8 bekannt ist. Die Antenne 2, bei der es sich auch um andere Antennen als planare Flächen handeln kann, ist auf den zu empfangenen Frequenzbereich, zum Beispiel UHF im Frequenzbereich von 470 bis 860 Megahertz abgestimmt. Zwecks Abschirmung ist eine Masse 3 (Massefläche oder dergleichen) um einen Fußpunkt 4 der Antenne 2 herum vorhanden, wobei die von der Antenne 2 empfangenen Signale am Fußpunkt 4 in ein Kabel (Antennenkabel, wie beispielsweise ein Koaxialkabel mit einem Innenund einem Außenleiter) eingespeist werden. Über dieses Kabel 5 gelangen die empfangenen Signale zu einem signalverarbeitenden Gerät 6 (wie beispielsweise einem Receiver, Fernseher oder dergleichen). Zur wirksamen Unterdrückung von Hochfrequenzleistungen auf dem Kabel 5 ist dem Fußpunkt 4 der Antenne 2 eine erste Mantelwellensperre 7 nachgeschaltet, die den von der Antenne 2 empfangenen Frequenzbereich (hier beispielsweise UHF 470 bis 860 Megahertz) bedämpft. Die Frequenzbereiche unterhalb und/oder oberhalb dieses ersten Frequenzbereiches (UHF) werden hingegen nicht bedämpft. Zur Bedämpfung dieser Frequenzbereiche ist eine weitere, zweite Mantelwellensperre 8 zwischen der ersten Mantelwellensperre 7 und dem signalverarbeitenden Gerät 6 vorgesehen. Diese weitere Mantelwellensperre 8 bewirkt, daß über den Außenleiter des Kabels 5 zusätzlich ein weiterer Frequenzbereich (z. B. VHF 170 bis 230 Megahertz) empfangen und das empfangene Signal über die erste Mantelwellensperre 7, welche den zweiten Frequenzbereich nicht bedämpft, in den Innenleiter des Kabels 5 eingespeist wird. Zur Abstimmung, inwieweit der zweite Frequenzbereich von der zweiten Mantelwellensperre 8 bedämpft wird, ist es erfindungsgemäß vorgesehen, daß ein Abstand 9 der zumindest zwei Mantelwellensperren 7, 8 in etwa eine Wellenlänge des zumindest weiteren Frequenzbereiches, insbesondere eines Mittelwertes oder der mittleren Frequenz dieses Frequenzbereiches, beträgt. Soll also über den Bereich des Kabels 5 zwischen den beiden Mantelwellensperren 7, 8 der Frequenzbereich 170 bis 230 Megahertz (VHF) empfangen werden, muß der Abstand der beiden Mantelwellensperren 7, 8 auf dem Kabel 5 etwa 1,7 Meter betragen.The figure shows an antenna device 1, which has an antenna 2 (or an antenna structure), as for example from the DE 102 20 670.8 is known. The antenna 2, which may also be antennas other than planar surfaces, is tuned to the frequency range to be received, for example UHF in the frequency range of 470 to 860 megahertz. For shielding, a ground 3 (ground plane or the like) is provided around a base 4 of the antenna 2, and the signals received from the antenna 2 at the root 4 are fed to a cable (antenna cable such as a coaxial cable having an inner conductor and an outer conductor) , About this cable 5, the received signals to a signal processing device 6 (such as a receiver, TV or the like). For effective suppression of high-frequency power on the cable 5, the foot point 4 of the antenna 2 is followed by a first standing wave trap 7, which attenuates the frequency range received by the antenna 2 (here, for example, UHF 470 to 860 megahertz). The frequency ranges below and / or above this first frequency range (UHF), however, are not attenuated. For damping these frequency ranges, a further, second standing wave blocking device 8 is provided between the first standing wave blocking device 7 and the signal processing device 6. This further standing wave blocking device 8 causes a further frequency range (eg VHF 170 to 230 megahertz) to be additionally received via the outer conductor of the cable 5 and the received signal to be transmitted to the inner conductor of the first waveguide barrier 7 which does not attenuate the second frequency range Cable 5 is fed. To vote to what extent the second frequency range is attenuated by the second standing wave block 8, it is inventively provided that a distance 9 of the at least two standing wave blocks 7, 8 in approximately a wavelength of at least another frequency range, in particular an average or the average frequency of this frequency range, is. If, therefore, the frequency range 170 to 230 megahertz (VHF) is to be received over the region of the cable 5 between the two standing wave barriers 7, 8, the distance between the two standing wave barriers 7, 8 on the cable 5 must be approximately 1.7 meters.

Insgesamt steht mit der erfindungsgemäßen Antenneneinrichtung 1, wie sie in der Figur gezeigt ist, eine einfache und kostengünstig zu realisierende Möglichkeit zur Verfügung, zumindest zwei Frequenzbereiche empfangen zu können, ohne daß hierfür zwei auf diese Frequenzbereiche abgestimmte Antennen 2 vorgesehen sein müssen. Der Einfachheit halber wird gemäß der Erfindung durch das Vorsehen zumindest einer weiteren Mantelwellensperre der überraschende Effekt ausgenutzt, daß das ohnehin erforderliche Antennenkabel für den zumindest zweiten Frequenzbereich als Antenne wirkt. Die vorstehend genannten Frequenzbereiche (UHF, VHF) sind beispielhaft und sollen der Erläuterung der Erfindung dienen, ohne daß diese darauf eingeschränkt ist. Selbstverständlich ist es möglich, durch Variation der Form bzw. der Bauart der Antenne 2, der Anordnung der Mantelwellensperren 7, 8 und des Kabels 5, vor allen Dingen durch die Bauart und Anordnung der zumindest weiteren Mantelwellensperre 8 auf, in oder an dem Kabel 5, die Frequenzbereiche zu variieren.Overall, with the antenna device 1 according to the invention, as shown in the figure, a simple and cost-effective way to be able to receive at least two frequency ranges can be provided without the need for two antennas 2 tuned to these frequency ranges. For the sake of simplicity, according to the invention, by providing at least one further standing wave barrier, the surprising effect is exploited that the antenna cable, which is required in any case, acts as an antenna for the at least second frequency range. The aforementioned frequency ranges (UHF, VHF) are exemplary and are intended to illustrate the invention without being limited thereto. Of course, it is possible, by varying the shape or design of the antenna 2, the arrangement of the standing wave barriers 7, 8 and the cable 5, especially by the design and arrangement of at least further standing wave trap 8 on, in or on the cable 5 to vary the frequency ranges.

Claims (3)

  1. Antenna device (1) for signal reception, in particular for reception of digital television signals, having an antenna (1) at whose foot point (4) signals in a first frequency range are output via a standing wave trap (7) and are passed via a coaxial cable (5) with an inner conductor and an outer conductor to a signal-processing appliance (6), with the standing wave trap (7) acting in the first frequency range, characterized in that at least one further standing wave trap (8) is provided between the standing wave trap (7) and the signal processing appliance (6) and acts in a further frequency range, and the outer conductor of the coaxial cable (5) between the standing wave trap (7) and the at least one further standing wave trap (8) acts as an antenna for at least the further frequency range, and in that the signal received by the outer conductor is fed via the standing wave trap (7) to the inner conductor of the coaxial cable (5).
  2. Antenna device (1) according to Claim 1, characterized in that the distance (9) between the at least two standing wave traps (7, 8) corresponds approximately to one wavelength of the at least one further frequency range, or a mid-frequency, or the mean value of the further frequency range.
  3. Antenna device (1) according to Claim 1 or 2, characterized in that the first frequency range is UHF (470 to 860 Megahertz), and the at least one further frequency range is VHF (170 to 230 Megahertz).
EP04020578A 2003-09-11 2004-08-31 Dual-band antenna for DVB-T reception Expired - Lifetime EP1515393B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10341964 2003-09-11
DE10341964A DE10341964A1 (en) 2003-09-11 2003-09-11 Antenna for DVB-T reception

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EP1515393A1 EP1515393A1 (en) 2005-03-16
EP1515393B1 true EP1515393B1 (en) 2007-10-03

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AT (1) ATE375014T1 (en)
DE (2) DE10341964A1 (en)
ES (1) ES2290597T3 (en)

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EP2434579B1 (en) * 2009-05-20 2014-02-12 Sony Corporation Antenna device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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FR2758012B1 (en) * 1996-12-27 1999-05-28 Thomson Csf DOUBLE ANTENNA, PARTICULARLY FOR VEHICLE
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ATE375014T1 (en) 2007-10-15
ES2290597T3 (en) 2008-02-16
DE502004005117D1 (en) 2007-11-15
DE10341964A1 (en) 2005-05-12
EP1515393A1 (en) 2005-03-16

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