EP1652267B1 - Systeme d'antenne - Google Patents

Systeme d'antenne Download PDF

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Publication number
EP1652267B1
EP1652267B1 EP04763839A EP04763839A EP1652267B1 EP 1652267 B1 EP1652267 B1 EP 1652267B1 EP 04763839 A EP04763839 A EP 04763839A EP 04763839 A EP04763839 A EP 04763839A EP 1652267 B1 EP1652267 B1 EP 1652267B1
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EP
European Patent Office
Prior art keywords
antenna
radiator
antenna element
arrangement
angle
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 - Fee Related
Application number
EP04763839A
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German (de)
English (en)
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EP1652267A1 (fr
Inventor
Roland Gabriel
Jürgen RUMOLD
Jörg LANGENBERG
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Kathrein SE
Original Assignee
Kathrein Werke KG
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Publication of EP1652267A1 publication Critical patent/EP1652267A1/fr
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/28—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the amplitude

Definitions

  • the invention relates to an antenna arrangement according to the preamble of claim 1.
  • the mobile radio antennas provided for a base station usually comprise an antenna arrangement with a reflector, in front of which a multiplicity of radiator elements are provided offset in the vertical direction relative to one another and thus form an array. These can radiate and receive, for example, in one or two mutually perpendicular polarizations.
  • the radiator elements can be designed to receive only in a frequency band.
  • the antenna arrangement can also be designed as a multi-band antenna, for example for transmitting and receiving two mutually offset frequency bands. Also so-called triband antennas are known in principle.
  • the mobile radio network is designed in the form of a cell, wherein each cell is assigned a corresponding base station with at least one mobile radio antenna for transmission and reception.
  • the antennas are constructed so that They usually radiate at a certain angle relative to the horizontal with the main lobe downwards, whereby a certain cell size is determined. This lowering angle is also known as the downtilt angle.
  • phase shifter arrangement has already been proposed in which, in the case of a single-column antenna array with a plurality of superposed radiators, the downtilt angle can be set continuously differently.
  • differential phase shifters are used which, with different settings, cause the propagation time and thus the phase shift at the two outputs of a respective phase shifter to be adjusted in different directions, as a result of which the lowering angle can be set.
  • phase shift angle can be carried out manually or by means of a remotely controllable retrofit unit, as for example according to the DE 101 04 564 C1 is known.
  • a generic antenna arrangement is known from US 4,667,201 to be known as known.
  • This prior art antenna basically comprises two mutually vertically offset radiator systems, each comprising a plurality of radiators. Each radiator belonging to a radiator are aligned and preset at a different angle to the horizontal.
  • an electronics is also provided, with the main source through different intensity and distribution, based on the radiator of the two radiator systems, can be set differently.
  • antennas in a mounting direction for example, in the vertical orientation of a reflector
  • antenna elements which comprise a horizontally polarized emitter and subsequently a vertically polarized emitter at a regular interval. It is a common arrangement of radiators in front of a reflector that radiate and / or receive in two different polarizations.
  • a dual polarized antenna arrangement is also known from US Pat EP 1 156 549 A2 known.
  • an antenna array is described in which a plurality of dual polarized radiators are provided, namely dual polarized radiator of a first radiator group and dual polarized radiator of a second radiator group.
  • the radiators of the individual radiator groups are provided for different frequency bands.
  • the distance between two radiators of one polarization direction is on the order of one wavelength of the operating frequency.
  • a vertical spacing of the individual radiators should be of the order of magnitude of one wavelength. Under this Prerequisite then the appropriate radiation patterns with desired half-width and side lobe attenuation can be achieved.
  • a phase adjustment between two limit values can also be carried out without any problems. This is possible in the context of the invention alone by a corresponding power distribution. However, if, in addition to a power distribution, a time shift of the signals which are supplied to the individual radiators is also realized, it is even possible to pivot beyond the area of the system lobes.
  • an antenna is assumed that comprises at least two emitter systems, also referred to below as emitter groups, each emitter group being composed of several emitters.
  • the radiators of the first radiator system are the radiators of the second radiator system with vertical offset and / or horizontal offset arranged alternately.
  • the spacing of the radiators interleaved with vertical and / or horizontal offset is chosen such that it lies in the region of half the wavelength of the operating frequency and not in the region of a whole wavelength, as is known from conventional antenna arrangements.
  • any angle, i. So any downtilt angle between them can be adjusted continuously.
  • pivoting beyond the region of the two system lobes is also possible.
  • this is done according to the invention in that an input signal to the various radiator elements, that is distributed to the at least two emitter elements provided offset to each other, wherein the individual portions of the (correlated) signals are supplied to the radiator elements with different amplitude. If the entire energy, for example, only the upper radiating with 0 ° relative to the horizontal radiating element supplied, the entire radiation of the main lobe in the horizontal direction. Will the total intensity of the supplied to the lower radiator device, which is preset, for example, with a downtilt angle of 10 °, so there is a radiation of the main lobe in this downwardly inclined 10 ° angle.
  • the intensity distribution of the at least two radiator elements supplied energy causes a continuous change in the orientation of the main lobe, explained in the Example can thus be set between 0 ° and a maximum of 10 ° with different angles of radiation with respect to the horizontal plane.
  • a power distribution of the two individual signals is made, but also a lateral displacement of the signals is realized, it can - as has already been pointed out - a pivoting over the area of the two system lobes also be realized.
  • the antenna array has compared to conventional antennas a significant, preferably by a factor of 2 closer occupancy of the radiator.
  • the vertically arranged radiators are alternately assigned to the two radiator groups, i. e.g. the lowermost radiator is assigned by means of feeding the first radiator group, the overlying radiator of the second radiator group, the third radiator from below again the first radiator group, etc.
  • the two radiator groups are also referred to as sub-arrays.
  • the corresponding radiator elements or their polarization direction is vertically aligned, it can thereby a different adjustment of the downtilt angle can be made.
  • the emitter elements are offset horizontally next to one another or their emitter or polarization plane is aligned in the horizontal direction, a different angular adjustment in the azimuth direction and not in the elevation direction can be made by the continuous different intensity supply of the signal. Again, taking into account an additional time shift in addition to a pure power distribution, a pivoting beyond the range of the two system lobes is also possible.
  • the solution according to the invention is basically also possible when using radiator elements which radiate in two mutually perpendicular polarizations and are thereby preferably aligned in a + 45 ° or -45 ° angle relative to the horizontal (or vertical).
  • the principle not only in a single-band antenna, but also in a multi-band antenna can be implemented, having the appropriate radiator for two, three, etc. frequency bands.
  • the limit value defined by the basic setting of the radiator elements can be changed, for example, by mechanical adjustment, if appropriate also by mechanically remote-controllable different angle setting.
  • an upper or lower limit value of the antenna arrangement can also be set so differently by additionally different phase setting that, in turn, any desired intermediate value of the main lobe alignment between the limit values predetermined in this way can be realized by the different intensity feed.
  • the supply of a corresponding antenna arrangement by means of a network which realizes a power distribution to the intended radiator elements.
  • a phase shifter which in the simplest case again consists of a differential phase shifter, e.g. works together with a 3 dB 90 ° hybrid.
  • the signals of equal amplitude are at different phase.
  • this causes the signals to be in phase there, but with different amplitudes.
  • the utility of the invention is not limited to a variable or fixed change in the vertical orientation of the radiation pattern, but it can basically be an arrangement for controlling the horizontal alignment of the radiation lobe realized.
  • antennas and antenna systems are conceivable which produce two horizontal diagrams depending on the wiring of a network.
  • FIGS. 1 to 6 a basic structure of an antenna system will first be explained with reference to various examples, with antenna arrangements according to the invention being described subsequently with reference to FIGS.
  • FIG. 1 shows, in a schematic front view, an antenna arrangement with a vertically oriented reflector 1, in front of which two radiator devices 3 are arranged vertically one above the other, which are also referred to as emitters 3 in the following.
  • each of the two radiators 3 consists of a radiator group 3.1 or 3.2, which in the embodiment shown in each case comprises a dipole radiator 3.1 or 3.2 with vertical alignment.
  • the antenna arrangement thus radiates in a vertical plane of polarization in a frequency band.
  • the antenna arrangement according to FIG. 1 is also reproduced in a side view only schematically for the purpose of illustrating the principle according to the invention.
  • the two radiators 3 are in the illustrated embodiment of home (eg fixed) preset so (for example, by mechanical alignment) that the upper radiator 3.1 exactly in the horizontal direction and the lower radiator device 3.2, for example, with a downtilt angle ⁇ of 10 ° relative to the horizontal plane inclined downwards. This default can also be set by appropriate mechanical pre-adjustment.
  • the main lobes 7.1 and 7.2 of the two radiator devices 3.1 and 3.2, which are also referred to below as radiator systems 3.1 and 3.2 are shown in Figure 2, as well as the respective associated horizontal plane eleventh
  • the antenna arrangement formed in this way is fed via a network 13, which in the exemplary embodiment shown comprises a hybrid circuit 15, for example a 3 db 90 ° hybrid, which is preceded by a phase shifter 17, in the embodiment shown a differential phase shifter 17.
  • a network 13 which in the exemplary embodiment shown comprises a hybrid circuit 15, for example a 3 db 90 ° hybrid, which is preceded by a phase shifter 17, in the embodiment shown a differential phase shifter 17.
  • phase shifter is now shifted to the left or right, for example according to the arrow representations 19, from the middle neutral position, then the phase position at the input 15a differs from that at the input 15b solely in that the signal coming from the phase shifter arrives earlier in the introduction branch 19a with a shortening of the electrical line and arrives later in the second branch 19b due to a larger path and a propagation delay caused thereby.
  • This has the consequence that at the output of the network, ie at the output 15'a, 15'b, the corresponding signals are again present with the same phase, but with different amplitudes.
  • the main lobes 18.1 and 18.2 are schematically illustrated, which reproduce the two radiation angles of the upper radiator element 3.1 and the lower radiator element 3.2 which are fixed by default.
  • a main lobe 18.3 can now be set at different interspacing angles in a far-field view by superposing the differently adjustable intensities of the main lobes 18.1 and 18.2.
  • phase shifter 17 can be controlled accordingly and with respect to the antenna a desired reduction of the resulting radiation lobe can be easily adjusted.
  • the antenna arrangement with two radiator systems (radiator groups) 3.1 and 3.2, which are arranged next to one another in a horizontal plane), it is provided that the two radiators 3 of the radiator systems 3.1 and 3.2 each have an angle of - ⁇ and + ⁇ , for example from -15 ° and + 15 ° with respect to a mean vertical plane radiate outward, it can now be adjusted by appropriate intensity distribution, the beam direction of the main lobe between these two extreme values of -15 ° to + 15 °.
  • FIG. 6 an antenna array with two is now shown Columns 23a and 23b are shown, in which two superposed radiator systems 3.11 and 3.21 or radiators are provided in one column or 3.12 and 3.22 in the second column. In principle, these are ultimately four emitter groups 3.11 to 3.22 or emitter systems.
  • An input signal is now supplied to the input 17a of the first phase shifter 17, which generates a signal with the same phase position but different intensity according to its adjustment via the downstream hybrid circuit 15 at the output of the hybrid circuit 15.
  • the downtilt angle of the antenna array according to FIG. 6 is set again.
  • the corresponding two signals are now via a corresponding circuit with a phase shifter 117a and 117b and a respective downstream hybrid circuit 115a and 115b again on the phase shifter 117a, 117b influenced so that at the output depending on the position of the phase shifter a greater or lesser intensity of the signal is applied to either the upper dipole radiator 3.11 or 3.12 and also a greater or lesser intensity to either the lower dipole radiator 3.21 or 3.22.
  • the two phase shifters 117a and 117b are preferably coupled to one another in the second stage, so that the intensity distribution for the radiator elements in the left or right-hand gaps 23a, 23b are divided in the same proportion to one another.
  • phase shifter 17 in the first stage of the network in cooperation with the downstream hybrid 15 of the first stage of the downtilt angle and by corresponding actuation or adjustment of the phase shifters 117a and 117b with the respective associated hybrid circuits 115a, 115b in the second stage, a corresponding angular adjustment in the azimuth direction are made to the main lobe between the system prescribed predetermined radiation angles as a limit to be set arbitrarily in between.
  • the corner or limit values for the different adjustable downtilt angle are basically given by the two system lobes. However, these limits can be overcome if, in addition, a separate phase shift is made for one or more radiator elements and the signal is supplied with a corresponding phase shift.
  • an antenna arrangement according to the invention with a plurality of individual radiators 3 is now shown, by way of example for two radiator groups, ie two radiator systems 3.1 and 3.2.
  • a signal is respectively supplied to a group belonging to the first radiator system 3.1 and a corresponding signal of a group of radiators 3 belonging to a second radiator system 3.2 is supplied via a second summation or branching circuit 27.2, each alternately vertically one above the other are arranged.
  • a dipole radiator can be involved here, but also other emitters or emitter devices, for example patch emitters, etc.
  • the stagnation distance is smaller by a factor of 2 than in known antenna arrangements.
  • the essential difference to the existing antenna arrangement is thus now that the distance of the individual radiators should preferably be in the range of half the wavelength of the operating frequency, rather than in the range of a whole wavelength, as is known from conventional antenna arrangements.
  • the spacing of the individual emitters should preferably be less than 90% relative to the entire wavelength, in particular less than 80%, less than 70% or less than 60% of a whole wavelength of the operating wavelength of an operating frequency (of a frequency band, ie of a value within the frequency band). Respectively. This results in the end for the antenna as a whole an arrangement in which the phase centers of the at least two antenna groups are relatively close to each other.
  • phase centers of the radiator groups are the phase centers of the two radiator groups, ideally in one point. There is no direct dependence on the wavelength. Due to the explained construction of the antenna, however, it follows that the phase centers of, for example, the two mentioned radiator groups are at a distance which is smaller than half the wavelength of the frequency band to be transmitted, usually with reference to the center frequency of this frequency band. Above all, in such an antenna (corresponding to FIG. 7 and corresponding to FIG. 8 described above all, in such an antenna (corresponding to FIG. 7 and corresponding to FIG.
  • the phase centers of the (two) radiator groups are at a distance of significantly less than half the wavelength, in particular at a distance of less than 80 %, in particular less than 60%, less than 40%, less than 20% or even less than 10%, based on half the wavelength, which is predetermined by the center frequency of the used frequency band.
  • improved diagrams with reduced side lobes are achieved when the individual radiators of the emitter group with the main lobe lowered already have individual diagrams with a downtilt angle in the region of the desired downtilt of the entire emitter group.
  • Such a downtilt for the individual radiators can be achieved, for example, by the fact that the corresponding reflector region, as shown in the exemplary embodiment according to FIG. 8, has the desired inclination.
  • a common reflector plane is not used, but reflectors assigned separately to the individual radiators are provided.
  • the arrangement is again alternately constructed such that, for example, the first, third, fifth, seventh etc. emitters 3.1 ', 3.3', 3.5 'and 3.7' are fed via a line system 51 with corresponding power split 53, and that the superposed radiator 2, 4, 6, 8, etc.
  • radiators 3.2 ', 3.4', 3.6 'and 3.8' of the first radiator system are fed via a line system 55 with subsequent power split 57.
  • the respective straight radiators 3.2 ', 3.4', 3.6 ', etc. have reflector systems 1' which are opposite the first radiators 3.1 ', 3.3', 3.5 'etc. of the second radiator system at a different angle, for example a presettable or mechanically changeable angle are set.
  • the mechanical adjustment can also be remotely controlled via a remotely controllable adjustment module, which can set the reflectors shown in Figure 8 1 'of the second radiator groups as needed in different angular direction.
  • a remotely controllable adjustment module which can set the reflectors shown in Figure 8 1 'of the second radiator groups as needed in different angular direction.
  • the arrangement is in each case such that adjacent radiator elements are not or only slightly influenced by inclined reflector walls or parasitic radiator elements.
  • this can be done e.g. achieve that the individual dipoles are isolated by partitions from each other.
  • an arrangement with a plurality of emitter systems is possible, which are embodied as areally arranged emitters in two mutually mutually appurtenant directions, preferably in two mutually perpendicular mounting directions, and are arranged interleaved with one another , preferably in an alternating arrangement.
  • a network 13 is provided, about which by means of a combination of vorzugêtr vertical and horizontal actuation alignment of the main lobe in space is vorappelbar.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Claims (10)

  1. Agencement d'antenne, présentant les éléments suivants :
    - il est prévu au moins deux systèmes rayonneurs (3.1, 3.2) qui comprennent chacun plusieurs éléments rayonneurs (3),
    - lesdits au moins deux systèmes rayonneurs (3.1, 3.2) sont agencés en décalage l'un par rapport à l'autre en direction horizontale et/ou verticale, de préférence devant un réflecteur (1),
    - lesdits au moins deux systèmes rayonneurs (3.1, 3.2) rayonnent dans au moins un plan de polarisation,
    - lesdits au moins deux systèmes rayonneurs (3.1, 3.2) sont agencés et/ou alimentés de telle sorte que le lobe principal (7.1) du premier système rayonneur (3.1) et le lobe principal (7.2) du second système rayonneur (3.2) définissent un angle (α) l'un avec l'autre,
    - il est prévu un réseau (13) par lequel un signal présentant différentes intensités relatives réglables est susceptible d'être acheminé au premier système rayonneur (3.1) et au second système rayonneur (3.2), de sorte que par une superposition correspondante des lobes principaux des éléments rayonneurs (3) desdits au moins deux systèmes rayonneurs (3.1, 3.2), il résulte différentes directions de rayonnement angulaires (α) de l'agencement d'antenne, et
    - les deux systèmes rayonneurs (3.1, 3.2) comprennent des éléments rayonneurs (3) qui émettent et/ou reçoivent à la même polarisation,
    caractérisé par les autres éléments suivants :
    - les éléments rayonneurs (3) du premier système rayonneur (3.1) sont agencés en alternance en décalage vertical et/ou en décalage horizontal avec les éléments rayonneurs (3) du second système rayonneur (3.2), et
    - la distance des éléments rayonneurs (3) agencés avec imbrication en décalage vertical et/ou horizontal est dans la plage de la moitié de longueur d'onde à la fréquence de fonctionnement.
  2. Agencement d'antenne selon la revendication 1, caractérisé en ce que l'agencement d'antenne comprend au moins deux colonnes (23a, 23b), et dans chaque colonne (23a, 23b) sont agencés au moins deux éléments rayonneurs (3) l'un au-dessus de l'autre, grâce à quoi la direction de rayonnement du lobe principal, résultant d'une superposition, de l'agencement d'antenne est réglable en direction d'élévation et en direction azimutale.
  3. Agencement d'antenne selon l'une des revendications 1 à 2, caractérisé en ce que le réseau comprend un circuit hybride (15, 115a, 115b) et un agencement déphaseur (17, 117a, 117b), de telle sorte qu'au moyen de l'agencement déphaseur (17, 117a, 117b), un signal de préférence d'intensité égale mais de différente position de phase est susceptible d'être acheminé aux entrées (15a, 15b) du circuit hybride (15, 115a, 115b), de sorte qu'à la sortie (15'a, 15'b) du circuit hybride (15, 115a, 115b) s'applique respectivement un signal de même position de phase mais de différente intensité.
  4. Agencement d'antenne selon l'une des revendications 1 à 3, caractérisé en ce que l'agencement déphaseur (17, 117a, 117b) est constitué par un déphaseur différentiel.
  5. Agencement d'antenne selon l'une des revendications 1 à 3, caractérisé en ce que l'agencement déphaseur (17, 117a, 117b) est constitué d'un agencement avec des lignes de longueurs différentes.
  6. Agencement d'antenne selon l'une des revendications 1 à 5, caractérisé en ce que lesdits au moins deux systèmes rayonneurs (3.1, 3.2) comprennent plusieurs éléments rayonneurs (3) qui sont agencés en imbrication mutuelle et en alternance sous forme d'éléments rayonneurs (3) disposés en surface dans deux directions de montage présentant un angle l'une par rapport à l'autre, de préférence dans deux directions de montage à angle droit l'une par rapport à l'autre, et en ce qu'il est prévu un réseau (13) qui permet de réaliser une orientation du lobe principal dans l'espace au moyen d'une combinaison d'une commande de préférence verticale et horizontale.
  7. Agencement d'antenne selon l'une des revendications 1 à 5, caractérisé en ce qu'un système rayonneur (3.1) est préréglé fermement avec un angle de rayonnement (angle d'inclinaison descendante).
  8. Agencement d'antenne selon la revendication 7, caractérisé en ce que les systèmes rayonneurs (3.1, 3.2) comprennent des éléments rayonneurs (3) auxquels est associé un réflecteur séparé respectif (1).
  9. Agencement d'antenne selon la revendication 8, caractérisé en ce que les éléments rayonneurs (3) d'un système rayonneur (3.2) sont réglables à un angle de rayonnement (angle d'inclinaison descendante) différent de celui des éléments rayonneurs (3) de l'autre système rayonneur (3.1).
  10. Agencement d'antenne selon la revendication 9, caractérisé en ce que l'angle de rayonnement réglable différemment est préréglable ou variable différemment, en particulier variable par voie mécanique, de préférence au moyen d'un module de réglage commandé à distance.
EP04763839A 2003-08-06 2004-08-05 Systeme d'antenne Expired - Fee Related EP1652267B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003136072 DE10336072B4 (de) 2003-08-06 2003-08-06 Antennenanordnung
PCT/EP2004/008799 WO2005018043A1 (fr) 2003-08-06 2004-08-05 Systeme d'antenne

Publications (2)

Publication Number Publication Date
EP1652267A1 EP1652267A1 (fr) 2006-05-03
EP1652267B1 true EP1652267B1 (fr) 2007-11-14

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EP (1) EP1652267B1 (fr)
CN (1) CN2691083Y (fr)
BR (1) BRPI0413320A (fr)
DE (1) DE10336072B4 (fr)
ES (1) ES2294526T3 (fr)
WO (1) WO2005018043A1 (fr)

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DE10104564C1 (de) * 2001-02-01 2002-09-19 Kathrein Werke Kg Steuerungsvorrichtung zum Einstellen eines unterschiedlichen Absenkwinkels insbesondere von zu einer Basisstation gehörenden Mobilfunkantennen sowie eine zugehörige Antenne und Verfahren zur Veränderung eines Absenkwinkels

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020177025A1 (fr) 2019-03-01 2020-09-10 Telefonaktiebolaget Lm Ericsson (Publ) Dispositif d'antenne et station de base le comprenant
EP3931910A4 (fr) * 2019-03-01 2022-03-30 Telefonaktiebolaget Lm Ericsson (Publ) Dispositif d'antenne et station de base le comprenant

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ES2294526T3 (es) 2008-04-01
BRPI0413320A (pt) 2006-10-10
EP1652267A1 (fr) 2006-05-03
DE10336072B4 (de) 2005-08-11
DE10336072A1 (de) 2005-03-10
WO2005018043A1 (fr) 2005-02-24

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