EP3311500A1 - Injection de signaux rf dans plusieurs récepteurs large bande différents à partir d'une surface active d'antenne - Google Patents

Injection de signaux rf dans plusieurs récepteurs large bande différents à partir d'une surface active d'antenne

Info

Publication number
EP3311500A1
EP3311500A1 EP16742166.8A EP16742166A EP3311500A1 EP 3311500 A1 EP3311500 A1 EP 3311500A1 EP 16742166 A EP16742166 A EP 16742166A EP 3311500 A1 EP3311500 A1 EP 3311500A1
Authority
EP
European Patent Office
Prior art keywords
frequency
antennas
receiving system
antenna
frequency signals
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.)
Withdrawn
Application number
EP16742166.8A
Other languages
German (de)
English (en)
Inventor
Uwe Kreissig
Peter Schaich
Michael Wiedmann
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 Car Communication GmbH
Original Assignee
Hirschmann Car Communication GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hirschmann Car Communication GmbH filed Critical Hirschmann Car Communication GmbH
Publication of EP3311500A1 publication Critical patent/EP3311500A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0064—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with separate antennas for the more than one band
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/08—Constructional details, e.g. cabinet
    • H04B1/082—Constructional details, e.g. cabinet to be used in vehicles

Definitions

  • the invention relates to a receiving system and a method for operating a receiving system, comprising at least two antennas and a respective amplifier downstream of each antenna, which amplify the radio frequency signals received by the antennas, and at least two end consumers, which are connected downstream of the amplifiers and the amplified high-frequency Signals are supplied for further processing, according to the Merkmaien of the preambles of the independent claims.
  • a receiving system and a method for operating such a receiving system is known in which at least two antennas 2, 3 are provided with which high-frequency signals can be received.
  • the received high-frequency signals are respectively supplied to an antenna associated amplifiers 4, 5, which amplify the high-frequency signals from the antennas.
  • the signals amplified by the respective amplifier are supplied to two end consumers 6, 7, such as an audio device, a television or the like.
  • the antennas are tuned to receive the high-frequency signals in the same frequency range (frequency band) or in strongly overlapping frequency ranges (frequency bands). That's the way it is, for example
  • each antenna receives in the band III frequency band in the frequency range of 170 MHz to 240 MHz and the second antenna in the frequency band BIII-BV in the frequency range of 170 MHz to 860 MHz.
  • each end user 6, 7 is assigned an antenna 2, 3 via its own amplifier 4, 5, each antenna covering at least the respectively required frequency range of the pickup and the at least two frequency bands being received by the at least two antennas , clearly cover.
  • the at least two antennas are arranged at a suitable location on or in the vehicle.
  • a known preferred arrangement of the two antennas is known on an antenna active surface in the form of a vehicle window, without this being limiting.
  • Such known receiving systems are used for the end users in the form of audio equipment (digital radio DAB) and mobile television.
  • the invention is therefore based on the object to avoid the disadvantages of the known receiving system and the known method for operating such a receiving system and to increase the performance of the receiving system and the method for operating the receiving system.
  • the at least two antennas are designed as frequency-selective antennas, which receive different or only slightly overlapping frequency bands from each other.
  • the number of antennas per se is not reduced in comparison with the prior art, but special reception properties of these antennas are used to less load the antennas (or with integration of antenna structures on a carrier such as a vehicle window) load, so that a reduction in power at the individual customers (amplifiers) is much lower.
  • this means that frequency-selective antennas are used which do not necessarily cover the entire frequency range, that is to say that the frequency-selective antennas either receive different or only slightly overlapping frequency bands.
  • Another advantage of using the frequency-selective antennas is the fact that the antennas can be made narrow-band, so that thereby an optimized reception performance can be realized.
  • This optimized Reception performance leads to a higher Antennenpegei, thereby improving the reception characteristics of the entire receiving system significantly and advantageously.
  • a further advantage is the fact that less coupled antennas are implemented in the antenna active surface according to the invention. Therefore, the number of couplings is reduced. As a result, fewer couplings must be considered in the vehicle-specific minor equipment, which advantageously reduces the development effort for such a receiving system (also referred to as antenna system).
  • Coupled refers to the influence of the antennas between each other, in the simplest case this is the transmission factor between the foot points: the larger the coupling, the more the changed load at the base point of one antenna influences the other antenna.
  • each required frequency ranges composed only after the amplification of the frequency-selective antennas received high-frequency signals from the respective end users (such as radio or television tuner or the like or other devices) each required frequency ranges composed.
  • the received and amplified signals are frequency-selectively received by different antennas and the composition of the required signals (frequency bands or frequency ranges) takes place only after the amplification and before the feed into the respective end user.
  • the transmission of the frequency-selective amplified signals takes place advantageously only with very little reduction of the signal-to-noise ratio, as a result of which a higher antenna level and, in turn, a better one Performance of the entire receiving system results.
  • the fact that the antennas are frequency-selectively received and thus narrow-band, they can be better optimized, which in turn advantageously leads to a higher antenna level and thus to a better performance of the method.
  • FIG. 1 a receiving system 1 according to the prior art is shown in FIG. 1, which has two antennas 2, 3.
  • the one antenna 2 of a certain length receives high-frequency signals in band III for
  • Digital radio in the frequency range from 170 MHz to 240 MHz.
  • the second antenna 3 receives high-frequency signals in bands III to V for television in the frequency range of 170 MHz to 860 MHz. This means that these frequency ranges clearly overlap.
  • the respective high-frequency signals received by the antennas 2, 3 are supplied and amplified to consumers (amplifier 4, amplifier 5). After the amplification of the high-frequency signals, which are separated from one another, they are each fed to a first end user 6 (for example a digital radio DAB) and a further end user 7 (for example a television set) for further processing.
  • a first end user 6 for example a digital radio DAB
  • a further end user 7 for example a television set
  • each end user 6, 7 is assigned to an antenna 2, 3 via a pickup (amplifier 4, 5), which covers at least the respectively required frequency range of the end customer 6, 7.
  • Denoted by 10 is an antenna active surface, for example a pane of a vehicle.
  • two antennas 22, 23 are again provided in the new receiving system 20 with an active antenna module 21, which are however designed as frequency-selective antennas.
  • the antennas are designed to be frequency selective by specifying their geometric structure, such as their length, since the length determines the resonant frequency.
  • their geometric structure such as their length
  • the length determines the resonant frequency.
  • at least the length of the antenna 23 is significantly shorter than the length of the antenna 3.
  • the one antenna 22 high-frequency signals in the band III, ie in the frequency range of 170 MHz to
  • the second antenna 23 selectively receives in the band IV to V, ie in the frequency range from 470 MHz to 860 MHz. This case is absolutely necessary, for example, in these frequency bands mentioned, but also in other frequency bands and particularly advantageous if the two frequency-selective antennas 22, 23 receive different and thus not overlapping frequency bands.
  • the received high frequency signals are relayed by the antennas 22, 23 to the pickups (first amplifier 24 and at least one other amplifier 25) via suitable means (such as coaxial cables).
  • the amplified high-frequency signals from the first amplifier 24 and the at least further amplifier 25 are not forwarded directly to the end users 6, 7 (in particular the devices for digital radio and television) but in between there is a supplementary signal processing in the active antenna module 21.
  • the high-frequency signals of the first antenna 22 at least the amplifier 24 is followed by a power divider 26, which forwards the high-frequency signals amplified by this amplifier 24 at least at one of the end users, here the end user 6.
  • At least the further amplifier 25 is followed by a diplexer 27, which forwards the high-frequency signals amplified by this amplifier 25 to at least one of the end users, here the end user 7.
  • the power divider 26 forwards the split high-frequency signals to one end user 6 and the other to the input of the diplexer 27. Therefore, the signal distribution to the end users 6, 7 happens only after the received from the antennas 22, 23 high-frequency signals have been amplified in the preferably different frequency bands or only slightly different frequency bands. This means that only after the amplification of the high-frequency signals in the different or only slightly overlapping frequency ranges of the Endabêtn 6, 7 respectively required frequency ranges are composed.
  • the power divider is realized, for example, according to Wilkinson, wherein the diplexer can be realized as a discretely constructed crossover.
  • suitable means such as power dividers and Diplexer are divided and / or summarized in the direction of the respective end user, so that each end user, the signals are provided in the frequency range, which he needs for the further processing of the signals and in particular the display or audition.
  • Digital radio (end user 6) only needs the frequency range of 170 MHz to 240 MHz, the power divider 26 is used because the received from the antenna 22 high-frequency signals cover exactly this frequency range, which then amplified by the amplifier 24 and then on the one receiving path the power divider 26 are supplied to the digital radio. Since the digital radio (end user 6) does not require the high-frequency signals in the range above 240 MHz, this advantageously does not additionally load the antenna system.
  • the end user 7 (for example, a television set) needs the high-frequency signals in the range of 470 MHz to 860 MHz.
  • the high-frequency signals in band IV and V (470 MHz to 860 MHz) are received by the second antenna 23 and the signals still required in band III are provided by the antenna 22.
  • the end user 7 receives the required frequency bands once via the antenna 22, the amplifier 24, the power divider 26 and the diplexer 27, and the other frequency bands (band IV and V) from the further antenna 23 via the further amplifier 25 and receives the second path of the diplexer 27.
  • This means that the respective required frequency ranges are assembled via the diplexer 27 for this end user 7.
  • the above-described receiving system 20 according to the invention and the associated method for operating this receiving system 20 are particularly preferably applied to vehicles.
  • the above-described receiving system 20 according to the invention and the associated method for operating this receiving system 20 are particularly preferably applied to vehicles.
  • At least two antennas 22, 23 arranged as antenna structures on an antenna active surface 10 (such as on, in or under a vehicle window or a body part, preferably made of an electrically non-conductive material).
  • the frequency range of the broadband service (for example TV) is not completely covered by an antenna 3 (as in the prior art), but it is received via two frequency-selective antennas 22, 23 and assembled in the active antenna module 21 the end users 6, 7 accordingly.
  • frequency-selective pickups 24, 25 (amplifiers) with power divider 26 and diplexer 27 are used in the active antenna module 21.
  • This has the advantage that the antenna active surface 10 is loaded only once by the customers for the individual frequency ranges. There is no power split in the antenna active surface because the frequency ranges do not overlap.
  • Another significant advantage is that the geometric area for the two services is much smaller. This leaves more construction space for antennas for receiving other services and also the coupling to other services is lower.
  • the power division in Band III for the two end users 6, 7 takes place in the invention only after the customers 24, 25 instead.
  • the two pickups 24, 25 are amplifying and thus a very low signal-to-noise reduction is achieved.
  • a further advantage of the invention is that since the antennas 22, 23 are narrowband, they can be optimized with better frequency selectivity, and be better adapted to the end users 6, 7 via matching networks. This leads to higher antenna levels and improves the sensitivity of the end users 6, 7 and thus the performance of the overall system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

Système de réception (20) présentant au moins deux antennes (22, 23) et respectivement un amplificateur (24, 25) monté en aval de chaque antenne (22, 23), amplifiant les signaux RF reçus par les antennes (22, 23), ainsi que deux récepteurs terminaux (6, 7) montés en aval des amplificateurs (24, 25) et recevant les signaux RF amplifiés pour un traitement ultérieur. Le système de réception est caractérisé en ce que les au moins deux antennes (22, 23) sont conçues en tant qu'antennes sélectives en fréquence recevant des bandes de fréquences différentes les unes des autres ou ne se chevauchant que très peu, et en ce que les plages de fréquences nécessaires aux récepteurs terminaux (6, 7) sont assemblées dans le module d'antennes actif (21).
EP16742166.8A 2015-06-22 2016-06-22 Injection de signaux rf dans plusieurs récepteurs large bande différents à partir d'une surface active d'antenne Withdrawn EP3311500A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015109958 2015-06-22
PCT/EP2016/064383 WO2016207201A1 (fr) 2015-06-22 2016-06-22 Injection de signaux rf dans plusieurs récepteurs large bande différents à partir d'une surface active d'antenne

Publications (1)

Publication Number Publication Date
EP3311500A1 true EP3311500A1 (fr) 2018-04-25

Family

ID=56550165

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16742166.8A Withdrawn EP3311500A1 (fr) 2015-06-22 2016-06-22 Injection de signaux rf dans plusieurs récepteurs large bande différents à partir d'une surface active d'antenne

Country Status (3)

Country Link
EP (1) EP3311500A1 (fr)
DE (1) DE102016211138A1 (fr)
WO (1) WO2016207201A1 (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006010591A1 (de) * 2005-03-08 2006-09-14 Hirschmann Car Communication Gmbh Mehrantennen-Empfangssystem in Fahrzeugen
AU2008341019A1 (en) * 2007-12-20 2009-07-02 Kaelus Pty Ltd Signal combiner

Also Published As

Publication number Publication date
DE102016211138A1 (de) 2016-12-22
WO2016207201A1 (fr) 2016-12-29

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