EP1652267A1 - Antennenanordnung - Google Patents
AntennenanordnungInfo
- Publication number
- EP1652267A1 EP1652267A1 EP04763839A EP04763839A EP1652267A1 EP 1652267 A1 EP1652267 A1 EP 1652267A1 EP 04763839 A EP04763839 A EP 04763839A EP 04763839 A EP04763839 A EP 04763839A EP 1652267 A1 EP1652267 A1 EP 1652267A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- radiator
- antenna arrangement
- antenna
- groups
- arrangement according
- 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.)
- Granted
Links
Classifications
-
- 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 plurality of radiating elements are provided, offset in relation to one another in the vertical direction, and thus form an array.
- a reflector in front of which a plurality of radiating elements are provided, offset in relation to one another in the vertical direction, and thus form an array.
- These can, for example, radiate and receive in one or two mutually perpendicular polarizations.
- the radiator elements can only be designed for reception in one frequency band.
- the antenna arrangement can also be designed as a multiband antenna, for example for transmitting and receiving two frequency bands which are offset from one another. So-called triband antennas are also known in principle.
- the mobile radio network is designed in the form of a cell, with each cell having a corresponding base station with at least one mobile radio antenna for transmitting and receiving assigned.
- the antennas are constructed in such a way that they generally radiate at a certain angle with respect to the horizontal with the main lobe facing downwards, as a result of which a specific cell size is defined. This lowering angle is also known as the down-tilt angle.
- WO 01/13459 A1 has therefore already proposed a phase shifter arrangement in which, in the case of a single-column antenna array with a plurality of radiators arranged one above the other, the down-tilt angle can be set continuously differently.
- differential phase shifters are used for this purpose, which, with different settings, have the effect that the transit time length and thus the phase shift at the two outputs of a respective phase shifter are adjusted in different directions, as a result of which the setback angle can be set.
- phase shifter angle can be set and adjusted manually or by means of a remotely controllable retrofit unit, as is known, for example, from DE 101 04 564 C1.
- a phase adjustment between two limit values can also be carried out continuously without any problems.
- this is possible only through a corresponding power distribution. If, however, in addition to a power distribution, there is also a time shift of the signals that are fed to the individual radiators, then it is even possible to swivel beyond the area of the system lobes.
- an antenna which comprises at least two radiator systems, also referred to below as radiator groups, each radiator group being composed of at least one, but usually several individual radiators, the at least two radiator groups being arranged offset from one another and thereby radiate at least in one polarization plane. If, for example, one radiator element of one radiator group with a down tilt angle of 0 ° and a second radiator element of the second radiator group - with a down tilt angle of 10 ° is inclined downwards relative to the horizontal, then any desired angle can be set using the antenna arrangement according to the invention. This means that any downtilt angle between can be set continuously. With additional consideration of a temporal shift in the signals that are supplied to the radiators, there is a swiveling beyond the area of the two system lobes realizable.
- this is done according to the invention in that an input signal is sent to the various radiator elements, i.e. is divided into the at least two mutually offset radiator elements, the individual portions of the (correlated) signals being supplied to the radiator elements with different amplitudes. If, for example, all of the energy is supplied only to the upper radiating element which radiates at 0 ° with respect to the horizontal, the entire lobe is radiated in the horizontal direction. If the entire intensity is fed to the lower emitter device, which is preset, for example, with a downtilt angle of 10 °, the main lobe is emitted at this downward inclined 10 "angle.
- the intensity distribution of the energy supplied to the at least two radiator elements causes a continuous change in the orientation of the main lobe, which thus in the example explained is between 0 ° and a maximum of 10 ° different radiation angles with respect to the horizontal plane can be set, but if not only a power distribution of the two individual signals is carried out, but also a lateral shift of the signals is also realized, as already pointed out, a Sch be realized beyond the area of the two system lobes.
- the antenna array points towards conventional antennas a substantially, preferably by a factor of 2 closer coverage of the radiators.
- the vertically-arranged radiators are alternately assigned to the two antenna element groups, ie for example the lowermost radiator is associated with means energiser the first radiator group ', the overlying radiator of the second antenna element group, the third emitters from the bottom turn of the first radiator group, etc.
- the two antenna groups are also as sub Arrays.
- the downtilt angle can be set differently. If the emitter elements are offset next to one another in the horizontal direction or if their emitter or polarization plane is aligned in the horizontal direction, the angle can be adjusted differently in the azimuth direction and not in the elevation direction due to the continuously different intensity supply of the signal.
- the angle can be adjusted differently in the azimuth direction and not in the elevation direction due to the continuously different intensity supply of the signal.
- pivoting beyond the area of the two system lobes is also possible.
- radiator elements which radiate in two mutually perpendicular polarizations and are oriented — preferably at a + 45 ° or -45 ° angle with respect to the horizontal (or vertical).
- the principle can be implemented not only with a single-band antenna, but also with a multi-band antenna that has appropriate radiators for two, three, etc. frequency bands.
- the set by the basic setting of the radiating elements limit for example by mechanical adjustment - may also optionally be changed by mechanically remotely controllable different angular setting.
- an upper or lower limit value of the antenna arrangement can also be set so differently by additionally different phase adjustment that the intermediate intensity of the main lobe alignment between the predetermined limit values can be realized by the different intensity feed.
- the supply of a corresponding antenna arrangement takes place by means of a network, which realizes a power distribution over the provided radiator elements.
- a network which realizes a power distribution over the provided radiator elements.
- This can include. for example in combination with a phase shifter, which in the simplest case again consists of a differential phase shifter, which works, for example, with a 3 dB-90 ° hybrid. They are at the entrance of the hybrid Signals of the same amplitude but with a different phase. At the output of the network, this means that the signals are there in phase, but with different amplitudes.
- the different phase control can be used to supply the same phase and different amplitudes.
- the usability of the invention is not only limited to a variable or fixed change in the vertical alignment of the radiation diagram, but in principle an arrangement for controlling the horizontal alignment of the radiation lobe can also be implemented.
- antennas and antenna systems are conceivable that generate two horizontal diagrams depending on the wiring of a network.
- a suitable additional network has shown that all alignment between the directions of the two individual lobes is infinitely adjustable, similar to the vertical case by means of a power distribution, also for a horizontal arrangement of the radiators. If, in addition to a pure power distribution, a phase shift, i.e. a time shift of the signals, is also generated, pivoting can take place in both the horizontal and vertical directions via the two system culling can be performed. With a corresponding combination of vertical and horizontal control, it is also possible to carry out a continuously changed alignment in the room.
- FIG. 1 a schematic front view of an antenna arrangement with two radiator elements (dipole radiators) arranged one above the other;
- FIG. 2 shows a schematic side view of the antenna arrangement according to FIG. 1 with an upstream network with a 90 ° hybrid and a differential phase shifter for controlling the amplitude;
- FIG. 3 shows a schematic view of the differently preset lobes of the antenna arrangement and the lobes of the overall system which can be adjusted in between and which result from superimposition;
- Figure 4 an embodiment modified to Figure 1;
- FIG. 5 a corresponding example for setting a different azimuth angle for the main lobe
- FIG. 6 an example of a correspondingly different setting of a lobe created by superimposition, which can be set differently in the azimuth and elevation directions;
- FIG. 7 a further exemplary embodiment in a schematic view.
- FIG. 8 a further schematic exemplary embodiment of an antenna system with alternately arranged radiators, the two radiator groups each being provided with alternating successive individual radiators or radiator groups, and the associated reflectors of at least one radiator group aligned at a different angle to the reflectors of the other radiator group are.
- each of the two radiator devices 3 consists of a radiator group 3.1 or 3.2, which in the exemplary embodiment shown each comprises a dipole radiator 3.1 or 3.2 with a vertical orientation.
- the antenna arrangement thus radiates in a vertical polarization plane in a frequency band.
- the antenna is now also purely schematic to illustrate the principle according to the invention. 1 shown in a side view.
- the two radiator devices 3 are preset (for example, fixed) from the start (for example by mechanical alignment) such that the upper radiator device 3.1 is exactly in the horizontal direction and the lower radiator device 3.2 is opposite, for example with a downtilt angle ⁇ of 10 ° the horizontal plane is inclined downwards.
- This pre-setting can also be fixed by corresponding mechanical pre-adjustment.
- the main lobes 7.1 and 7.2 of the two emitter devices 3.1 and 3.2 are shown in FIG. 2, as is the respectively assigned horizontal plane 11.
- 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, to which a phase shifter 17,. in the embodiment shown, a differential phase shifter 17 is upstream.
- a network 13 which in the exemplary embodiment shown comprises a hybrid circuit 15, for example a 3 dB-90 ° hybrid, to which a phase shifter 17,. in the embodiment shown, a differential phase shifter 17 is upstream.
- the control is to be explained in the exemplary embodiment shown below, starting from the basic position in which the phase shifter 17 ′′ is in its neutral central position, the signals coming from the phase shifter having the same amplitude being present at the input 15a or 15b of the hybrid circuit 15 If the phase shifter 17 is in its central starting or neutral position, the signals are also present at the two inputs 15a and 15b of the hybrid circuit 15 with the same phase position.
- phase shifter is, for example, according to the arrow representations 19 shifted from the middle neutral position to the left or right, 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 when the electrical line is shortened and in second branch 19b arrives later due to a larger path and a delay in running time caused thereby.
- the result of this is that the corresponding signals are now again present at the same phase, but with different amplitudes, at the output of the network, that is to say at the output 15'a, 15'b.
- the two radiator groups ie the radiator device or radiator elements 3.1 and 3.2, with the corresponding different amplitudes
- the upper radiator group 3.1 or the lower radiator group 3.2 ie in the present case, is given If the upper radiator device or the upper radiator element 3.1. or the lower radiator device or the lower radiator element 3.2 a differently larger or smaller intensity component of the fed signal.
- the antenna arrangement explained would radiate in exactly the horizontal direction (since no energy is supplied to the lower radiator device 3.2 at all). If the entire feed signal were fed exclusively to the lower radiator device 3.2, the entire antenna array would radiate exactly 10 ° from the exemplary embodiment shown, with the down-tilt angle. But if the signal is now Licher intensity of both the upper and the lower radiator group 3.1 or 3.2 supplied, depending on
- a main lobe 18.3 can be set at different intermediate radiation angles.
- Will z-. B. uses a control unit in the base station and / or a controllable additional device, for example in the form of a stepper motor, the phase shifter 17 can be controlled accordingly and a desired reduction in the resulting radiation lobe can be easily set with respect to the antenna.
- a different radiation angle setting can also be carried out in the horizontal direction, that is to say in the azimuth direction.
- the execution Example referred to Figure 4 in which a corresponding antenna arrangement is described with two radiator devices 3.1 and 3.2, which are now offset from each other in the horizontal direction.
- the supply also takes place again via a network 13 explained with reference to FIG. 2.
- the hybrid circuit 15 can receive a signal with the same intensity at the two inputs 15a and 15b different phase positions are supplied, which means at the output 15 "a and 15 'b of the hybrid circuit 15 that the ' signal present there is now supplied to the two radiator devices 3.1 and 3.2 with the same phase position but different intensity.
- Figure 5 is intended to schematically represent the antenna arrangement with two radiator groups 3.1 and 3.2, which are arranged in a horizontal plane next to one another) that the two radiator devices 3.1 and 3.2 are each at an angle of - ⁇ and + ⁇ , at for example from -15 ° and + 15 ° compared to a medium one
- An antenna array is now based on FIG. shown with two columns 23a and 23b, in each of which two radiator devices or radiator elements 3.11 and 3.21 arranged one above the other in the one column or 3.12 and 3.22 in the. second column are provided. In principle, there are ultimately four radiator groups 3.11-3.22.
- An input signal is now fed to the input 17a of the first phase shifter 17, which, in accordance with its adjustment direction, generates a signal with the same phase position but different intensity at the output of the hybrid circuit 15 via the downstream hybrid circuit 15.
- the downtilt angle of the antenna array according to FIG. 6 is set again, for example.
- the corresponding two signals are now influenced via a corresponding circuit with a phase shifter 117a or 117b and a respective downstream hybrid circuit 115a or 115b again via the phase shifters 117a, 117b in such a way that a greater or lesser intensity at the output, depending on the position of the phase shifter of the signal 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 and right columns 23a, 23b are divided in the same ratio to one another.
- the downtilt angle can be adjusted or adjusted accordingly in the first stage of the network in cooperation with the downstream hybrid 15 of the first stage, and by correspondingly actuating or adjusting the phase shifters 117a and 117b with the respectively assigned hybrid circuits 115a, 115b in the second stage, a corresponding angle setting is made in the azimuth direction in order to arbitrarily set the main lobe between the radiation angles specified as a limit value in between.
- the basic or limit values for the different adjustable downtilt angles are basically given by the two system lobes. However, these limit values can be overcome if a separate phase shift is additionally carried out for one or more radiator elements and the signal is supplied with a corresponding phase shift.
- An antenna arrangement with a plurality of individual radiators or radiator devices 3 is shown with reference to FIG. 7, specifically for two radiator groups.
- a signal is supplied to a group belonging to the first radiator group 3.1 via a summation or branching circuit 27.1 and a corresponding signal is supplied to a group of radiator elements belonging to a second radiator group 3.2 via a second summing or branching circuit 27.2, each alternately vertically are arranged one above the other.
- This can be, for example, dipole emitters, but also other emitter devices, for example patch emitters, etc.
- a down-tilt angle can then be set between the limit values specified in this way only by dividing the intensity.
- a similar arrangement may, of course, again corresponding to the embodiment according to FIGS 4 and 5 are used for the different orientation of the 'main lobe in azimuth direction.
- the spacing 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.
- This reduction in the antenna spacing distance "by a factor of 2" enables particularly useful individual diagrams with
- the distance between the individual emitters should preferably be less than 90% based on the entire wavelength, in particular less than 80%, less than 70% or less than 60% of an entire wavelength of the operating wavelength of an operating frequency (a frequency Ba ndes, i.e. a value within the frequency band). This ultimately results in an arrangement for the antenna as a whole in which the phase centers of the at least two antenna groups are equally close to each other.
- phase centers of the radiator groups in the exemplary embodiment shown the phase centers of the two radiator groups, ideally lie at one point. There is no direct dependence on the wavelength.
- the structure of the antenna explains, however, that the phase centers, for example of the two radiator groups mentioned, are at a distance from one another which is less than half the wavelength of the frequency band to be transmitted, usually based on the center frequency of this frequency band.
- the phase centers for example of the two radiator groups mentioned, are at a distance from one another which is less than half the wavelength of the frequency band to be transmitted, usually based on the center frequency of this frequency band.
- 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 frequency band used.
- improved diagrams with reduced side lobes are achieved when the individual radiators of the radiator group with the main lobe lowered already have individual diagrams with a downtilt angle in the region of the desired downtilt of the entire radiator group. point.
- Such a down tilt for the individual radiators can be achieved, for example, by the corresponding reflector region, as is shown in the exemplary embodiment according to FIG. 8, having the desired inclination.
- a common reflector plane is not used, but instead reflectors are assigned separately to the individual radiators .
- the arrangement is alternately constructed such that, for example, the first, third, fifth, seventh, etc. emitters 3.1 ', 3.3', 3.5 'and 3.7'. via a line system 51 with appropriate power • erzweigung 53 are fed, and that the überpul5 arranged Strahler weakness2, 4, 6, 8 etc.
- the odd radiator groups 3.1 ', 3.3', 3.5 'etc. have, for example, assigned reflectors 1.0 which are oriented in the vertical direction (but can also have a different angle to them and be preset).
- the respective straight radiator groups 3.2 ', 3.4', 3.6 'etc. have reflector systems 1' which are at a different angle to the first radiator groups 3.1 ', 3.3', 5 3.5 'etc., for example a preset or mechanically changeable one Angles are set.
- the mechanical adjustment can also be carried out remotely via a remotely controllable setting module which can adjust the reflectors 1 'of the second radiator groups shown in FIG. 8 in different angular directions as required.
- This embodiment shows that an additional adjustment of individual emitters either by electrical means can take place by different setting of a phase offset or also in the mechanical way explained.
- the arrangement is preferably such that adjacent radiator elements are not or only insignificantly influenced by inclined reflector walls or parasitic radiator elements. With dipole radiators this can e.g. by isolating the individual dipoles from each other by partitions.
- an arrangement with a plurality of radiator groups is therefore possible which are arranged as planar radiators in two mounting directions lying at an angle to one another , preferably in two mounting directions at right angles to each other, and are arranged nested in one another, preferably in an alternating arrangement.
- a network 13 can then be provided, by means of which a combination of preferably vertical and horizontal control can be used to align the main lobe in space.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
Claims
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 (de) | 2003-08-06 | 2004-08-05 | Antennenanordnung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1652267A1 true EP1652267A1 (de) | 2006-05-03 |
EP1652267B1 EP1652267B1 (de) | 2007-11-14 |
Family
ID=34177326
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04763839A Expired - Lifetime EP1652267B1 (de) | 2003-08-06 | 2004-08-05 | Antennenanordnung |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1652267B1 (de) |
CN (1) | CN2691083Y (de) |
BR (1) | BRPI0413320A (de) |
DE (1) | DE10336072B4 (de) |
ES (1) | ES2294526T3 (de) |
WO (1) | WO2005018043A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0509647D0 (en) | 2005-05-12 | 2005-06-15 | Quintel Technology Ltd | Electrically steerable phased array antenna system |
GB0512805D0 (en) * | 2005-06-23 | 2005-08-03 | Quintel Technology Ltd | Antenna system for sharing of operation |
DE102005061636A1 (de) * | 2005-12-22 | 2007-06-28 | Kathrein-Werke Kg | Dual polarisierte Antenne |
US7427966B2 (en) | 2005-12-28 | 2008-09-23 | Kathrein-Werke Kg | Dual polarized antenna |
CN102683823B (zh) * | 2012-05-15 | 2015-07-29 | 华为技术有限公司 | 辐射单元、天线阵列、天线装置和基站系统 |
DE102015001002B4 (de) * | 2015-01-27 | 2018-12-27 | Kathrein Se | Nahfeldmessung von aktiven Antennensystemen |
EP3931910A4 (de) * | 2019-03-01 | 2022-03-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Antennenvorrichtung und basisstation damit |
CN111541046B (zh) * | 2020-05-08 | 2022-02-11 | 中国联合网络通信集团有限公司 | 一种龙伯透镜天线及基站 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4612547A (en) * | 1982-09-07 | 1986-09-16 | Nec Corporation | Electronically scanned antenna |
US4667201A (en) * | 1983-11-29 | 1987-05-19 | Nec Corporation | Electronic scanning antenna |
JPS62224102A (ja) * | 1986-03-26 | 1987-10-02 | Mitsubishi Electric Corp | アレ−アンテナ |
JPH11510662A (ja) * | 1995-08-10 | 1999-09-14 | イー・システィムズ、インコーパレイティド | 移動無線通信システム用のアンテナ |
US5923296A (en) * | 1996-09-06 | 1999-07-13 | Raytheon Company | Dual polarized microstrip patch antenna array for PCS base stations |
JPH10229362A (ja) * | 1997-02-17 | 1998-08-25 | Fujitsu Ltd | 無線基地局装置 |
DE19938862C1 (de) * | 1999-08-17 | 2001-03-15 | Kathrein Werke Kg | Hochfrequenz-Phasenschieberbaugruppe |
KR20090126300A (ko) * | 2000-07-10 | 2009-12-08 | 앤드류 엘엘씨 | 셀룰러 안테나 |
DE10105150C2 (de) * | 2001-01-30 | 2003-10-02 | Hurnaus Stahl Und Maschb Gmbh | Zerkleinerer |
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 |
-
2003
- 2003-08-06 DE DE2003136072 patent/DE10336072B4/de not_active Expired - Fee Related
- 2003-10-30 CN CNU200320103861XU patent/CN2691083Y/zh not_active Expired - Fee Related
-
2004
- 2004-08-05 EP EP04763839A patent/EP1652267B1/de not_active Expired - Lifetime
- 2004-08-05 WO PCT/EP2004/008799 patent/WO2005018043A1/de active IP Right Grant
- 2004-08-05 ES ES04763839T patent/ES2294526T3/es not_active Expired - Lifetime
- 2004-08-05 BR BRPI0413320-0A patent/BRPI0413320A/pt not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO2005018043A1 * |
Also Published As
Publication number | Publication date |
---|---|
ES2294526T3 (es) | 2008-04-01 |
EP1652267B1 (de) | 2007-11-14 |
BRPI0413320A (pt) | 2006-10-10 |
CN2691083Y (zh) | 2005-04-06 |
DE10336072A1 (de) | 2005-03-10 |
WO2005018043A1 (de) | 2005-02-24 |
DE10336072B4 (de) | 2005-08-11 |
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