EP1253669A2 - Gruppenantenne mit einer Anzahl von Resonanz-Strahlerelementen - Google Patents
Gruppenantenne mit einer Anzahl von Resonanz-Strahlerelementen Download PDFInfo
- Publication number
- EP1253669A2 EP1253669A2 EP02006322A EP02006322A EP1253669A2 EP 1253669 A2 EP1253669 A2 EP 1253669A2 EP 02006322 A EP02006322 A EP 02006322A EP 02006322 A EP02006322 A EP 02006322A EP 1253669 A2 EP1253669 A2 EP 1253669A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- branches
- group antenna
- antenna according
- elements
- blind
- 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
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
- H01Q21/065—Patch antenna array
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
- H01Q21/0075—Stripline fed arrays
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
Definitions
- the invention relates to a group antenna with a number of Resonance radiator elements according to the preamble of claim 1.
- Group antennas are made by combining individual Antenna elements and a network for common supply manufactured.
- networks come out of the question Parallel branches of feed lines exist (parallel feed) in the Contrary to those from series orders (series feed).
- Parallel branches of feed lines exist (parallel feed) in the Contrary to those from series orders (series feed).
- Parallel feed networks uses the same length signal paths from the feed point to each Ensure radiator element so that all radiators for all frequencies work in phase.
- Adjustment bandwidth is usually based solely on the bandwidth of the Radiator elements determined because the network with broadband Line branches can be built.
- the relative bandwidth of group antennas with resonance radiator elements, especially from Type microstrip patch antenna is therefore only a few percent limited, depending on the amount of substrate material used.
- Group antennas with a number of resonance radiating elements and a dining network that has a number of between one Input connection and the individual resonance radiator elements in parallel contains switched feed lines are generally known.
- the object of the invention is a group antenna with resonance antenna elements to be designed so that an increase in Adaptation bandwidth without disadvantageous additional effort in the spotlights and the dining network is possible.
- the invention provides a group antenna with a number of Resonance radiator elements and a feed network, which one Number of between an input connection and the individual resonance radiator elements parallel feed lines of the same length Contains signal paths created.
- the parallel feed lines each have a weak Coupled transmission resonator included, which in the Feed lines a pass filter (in the literature also as Transmission filter called) is formed.
- Pass-through filter is on Meinke / Gundlach "Taschenbuch der High frequency technology "second edition, 1968, page 469, chapter G.11 directed.
- a line filter is created, which is connected to the feed network is distributed and the lines of the feed network between the Spotlight elements and the central dining point of the group entirely or in Uses sections.
- An advantage of the array antenna according to the invention is that Feed network simultaneously to distribute or collect the signals the resonance radiator elements and to compensate for the reactive components the radiator element impedance is used.
- the transmission resonators are preferably separated by two into the Feed lines arranged blind elements formed.
- a first blind element at a first distance l 1 and a second blind element at a second distance which is greater than the first distance l 1 are arranged in the feed line in front of the respective resonance radiator element.
- the feed lines preferably branch off from one common input connection to several resonance steel elements.
- the signal paths of all feed lines are preferably between the Input connection and the respective resonance radiator elements the same long.
- the feed lines respective branches from a respective common branch in split each individual branch, forming the first blind element is on the radiator element side at a certain branch and the second blind element on the input side is determined by another Branch is located.
- the group antenna contains a group of 2 ⁇ 2 patch radiators, in which the feed network contains a common input branch which is connected to a single input connection and which branches at a first branch into two separate first branches splits and the separated first branches split at second branches into individual branches connected to the individual patch radiators, and wherein the first blind elements are each arranged at a first distance l 1 in front of the individual patch radiators and the second blind elements at a second distance l 2 of the first dummy elements are provided in the direction towards the input connection.
- this contains a group of 1 ⁇ 8 patch radiators, the feed network containing a common input branch connected to an input connection, which splits into two separate first branches at a first branch, each of the separate branches split the first branches at second branches into two separate second branches and each of the separate second branches at third branches in turn split into two separate branches connected to the individual patch radiators, and the first blind elements at a first distance l 1 each the individual patch radiators are arranged, and the second blind elements are arranged at a second distance l 2 from the first blind elements in the direction towards the input connection.
- one is common Dummy element arranged in the common input branch.
- the first blind elements are between the second branches and the third branches in the separate second branches provided.
- the second Dummy elements between the first branch and the second Branches are provided in the separate first branches.
- the blind elements are preferably formed by capacitors.
- the capacities are through on stub lines provided for the feed lines.
- the blind elements be formed by inductors.
- the branches are preferably T-branches.
- the T-branches can be Wilkinson dividers, reactive T-branches, Directional coupler with phase compensation or magic T-branches his.
- the resonance radiator elements can also be by dipoles or by Slot radiator be formed.
- the feed network contains symmetrical branches.
- the feed network can contain asymmetrical branches.
- This circuit part forms a weakly coupled transmission resonator in the feed line, the blocking attenuation of which increases with the size of the capacitances and the bandwidth of which decreases with increasing length l 2 .
- a large distance l 2 is required, for example 2 ⁇ .
- the effective imaginary part of the filter impedance thus decreases with approximately the same frequency steepness as that of the connected radiator element increases.
- the opposite direction of the phase changes must still be set by the distance l 1 .
- the course of a reflection factor which corresponds to that of a two-circuit band filter results at the input 103 of the feed line 104.
- This course is shown in Figure 2 with a dash-dotted line against the frequency.
- a resonance radiator element which is formed without a transmission resonator, such as that formed by the two capacitances C 1 , C 2 , has the refection behavior of a simply tuned resonance circuit, as shown in FIG. 2 by the solid line.
- the adaptation width ⁇ f 'with transmission resonator which is adjustable, can be increased to about three times the width 3 ⁇ f of the conventional case ⁇ f, depending on the permitted reflection factor within the bandwidth.
- FIGS. 3 and 4 show exemplary embodiments in the form of a 2 ⁇ 2 group of patch radiators or a 1 ⁇ 8 group of patch radiators, which are each coupled to an input connection 203 or 303 via a feed network 202 or 302 .
- the dining networks 202; 302 also serve to distribute or collect the signals at the resonance radiator elements 201 k or 301 k of the groups.
- the feed network 202 is constructed in the manner of tree-shaped combined T-branches.
- the k to each of the radiator elements 201 leading parallel-connected feed lines 204 k extend in a part of the feed network 202 together and separate until immediately before the individual radiator elements 201 k into individual line branches 211 k ,
- the feed network 202 contains a common input branch 205 connected to the input connection 203, which splits at a first branch 206 into two separate first branches 207 i .
- the separated first branches 207 i in turn split at second branches 208 i into the individual branches 211 k connected to the individual patch radiators 201 k .
- the first blind elements in the form of the first capacitances C 1 are arranged at a first distance l 1 in front of the individual patch radiators 211 k .
- the second blind elements in the form of the second capacitances C 2 are arranged at a second distance l 2 from the first blind elements C 1 in the direction towards the input connection 203.
- the first capacitances C 1 for each radiator element 201 k are arranged separately in the individual branch 211 k of the feed network 202, whereas the second capacitance C 2 for all feed lines 204 k in the form of the line branches of the feed network 202 together in the with the input terminal 203 coupled common input branch 205 is arranged.
- the capacitances C 1 , C 2 are each provided in the form of a short idle stub. Because of the equally long signal paths in the feed network 202, all four distances between the stub lines forming the capacitances C 1 and the stub line forming the capacitance C 2 are the same.
- the individual radiator elements 301 k are coupled via a feed network 302 to a common input connection 303.
- Each of the individual radiators 301 k is coupled to the common input connection 303 via a feed line 304 k , one of which is shown in broken lines in FIG. 4, of the feed network 302.
- a common input branch 305 which is connected to the input connection 303, splits at a first branch 306 into two separate first branches 307 i .
- Each of the separate first branches 307 i in turn splits into two separate second branches 309 j at second branches 308 i .
- Each of the separate second branches 309 j in turn splits at third branches 310 j into two separate individual branches 311 k , which in turn are connected to the individual radiator elements 301 k .
- the first dummy elements in the form of the first capacitances C 1 are arranged at a first distance l 1 in front of the individual radiator elements 301 k in the second branches 309 j , that is to say one capacitance C 1 together for two radiator elements 301 k and at the same distance l 1 in front of the same.
- the second dummy elements in the form of the second capacitances C 2 are arranged at a second distance l 2 from the first capacitances C 1 in the direction toward the input connection 303, each on the first branches 307 i , that is to say one capacitance C 2 together for four radiator elements 301 k or for four feed lines 304 k .
- the capacitances C 1 , C 2 are each formed by a stub branching off from the feed lines 304 k .
- the lengths of all signal paths formed by the feed lines 304 k are the same for all radiator elements 301 k , as are the distances l 1 and l 2 at which the individual capacitances C 1 and C 2 are spaced apart from one another and from the radiator elements 301 k and from the input connection 303 are arranged.
- T-branches e.g. Wilkinson divider, reactive T-branches with jumps in wave resistance in the Branch lines, directional couplers with phase compensation or magical T-junctions.
- the capacitances C 1 , C 2 can be realized in a different way, for example by dip pins or screens in waveguide technology. Inductive blind elements can also be used instead of capacitances for the production of the transmission resonator structure.
- the application is not on group antennas with patch radiators limited, but applicable to all types of spotlights whose Feed point impedance is determined by a resonant circuit resonance, e.g. Dipoles or slot radiators, possibly also in combination with further circuit elements, such as coupling reactors or additional pipe sections.
- a resonant circuit resonance e.g. Dipoles or slot radiators
- further circuit elements such as coupling reactors or additional pipe sections.
- the concept is the same applicable to antennas with equal assignment of the radiator elements (symmetrical 1: 1 divider in the dining network) or with Non-equal assignment (asymmetrical divider), but in any case with the same long signal paths, i.e. with the same phase of the radiator elements.
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Waveguide Aerials (AREA)
Abstract
Description
- Figur 1
- ein schematisiertes Schaltbild, welches die Prinzipschaltung eines Transmissionsresonators an einem Resonanz-Strahlerelement einer Gruppenantenne gemäß einem Ausrührungsbeispiel der Erfindung zeigt;
- Figur 2
- ein Diagramm, das die Anpassungsbandbreite von Resonanz-Strahlerelementen für den Fall herkömmlicher Beschaltung und für den Fall erhöhter Bandbreite gemäß der vorliegenden Erfindung wiedergibt;
- Figur 3
- eine schematisierte Darstellung einer Gruppenantenne mit einer 2 × 2-Gruppe von Patch-Strahlern gemäß einem Ausführungsbeispiel der Erfindung; und
- Figur 4
- eine schematisierte Darstellung einer Gruppenantenne mit einer 1 × 8-Gruppe von Patch-Strahlern gemäß einem anderen Ausführungsbeispiel der Erfindung.
- 101; 201 k; 301 k
- Resonanz-Strahlerelemente
- 202; 302
- Speisenetzwerk
- 103; 203; 303
- Eingangsanschluß
- 104; 204k; 304k
- Speiseleitung
- 205; 305
- gemeinsamer Eingangszweig
- 206; 306
- erste Verzweigung
- 207i; 307i
- erste Zweige
- 208i; 308i
- zweite Verzweigung
- 309j
- zweite Zweige
- 310j
- dritte Verzweigung
- 211k; 311k
- Einzelzweige
Claims (24)
- Gruppenantenne mit einer Anzahl von Resonanz-Strahlerelementen (101; 201k; 301k) und einem Speisenetzwerk (202; 302), welches eine Anzahl von zwischen einen Eingangsanschluß (103; 203; 303) und die einzelnen Resonanz-Strahlerelemente (101; 201k; 301k) parallel geschaltete Speiseleitungen (104; 204k; 304k) enthält, wobei die parallel geschalteten Speiseleitungen (104; 204k; 304k) gleich lange Signalwege aufweisen, dadurch gekennzeichnet, daß die Speiseleitungen (104; 204k; 304k) jeweils einen schwach angekoppelten Transmissionsresonator enthalten, so dass in den Speiseleitungen ein Durchgangsfilter gebildet ist.
- Gruppenantenne nach Anspruch 1, dadurch gekennzeichnet, daß die Transmissionsresonatoren durch zwei in den Speiseleitungen (104; 204k; 304k) angeordnete Blindelemente (C1, C2) gebildet sind.
- Gruppenantenne nach Anspruch 2, dadurch gekennzeichnet, daß in der Speiseleitung (104; 204k; 304k) ein erstes Blindelement (C1) in einem ersten Abstand l1 und ein zweites Blindelement (C2) in einem zweiten Abstand, der größer als der erste Abstand l1 ist, vor dem jeweiligen Resonanz-Strahlerelement (104; 204k; 304k) angeordnet ist.
- Gruppenantenne nach Anspruch 3, dadurch gekennzeichnet, daß das zweite Blindelement (C2) in einem Abstand l2 ≈ N ·λ/2 vor dem ersten Blindelement (C1) angeordnet ist, wobei N = 1, 2, 3 ... und λ die Arbeitsmittenfrequenz der Gruppenantenne ist.
- Gruppenantenne nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß sich die Speiseleitungen (204k; 304k) von einem gemeinsamen Eingangsanschluß (203; 303) auf mehrere Resonanz-Stahlerelemente (204k; 304k) verzweigen.
- Gruppenantenne nach Anspruch 5, dadurch gekennzeichnet, daß die Signalwege aller Speiseleitungen (204k; 304k) zwischen dem Eingangsanschluß (203; 303) und den jeweiligen Resonanz-Strahlerelementen (201k; 301k) gleich lang sind.
- Gruppenantenne nach Anspruch 6, dadurch gekennzeichnet, daß sich die Speiseleitungen (204k; 304k) an jeweiligen Verzweigungen von einem jeweiligen gemeinsamen Zweig in jeweilige einzelne Zweige aufspalten, wobei sich das erste Blindelement (C1) strahlerelementseitig einer bestimmten Verzweigung befindet und sich das zweite Blindelement (C2) eingangsseitig der bestimmten Verzweigung befindet.
- Gruppenantenne nach Anspruch 7, dadurch gekennzeichnet, daß sich in einem Zweig einer Speiseleitung (304k) zwischen dem ersten Blindelement (C1) und dem zweiten Blindelement (C2) eine einzige Verzweigung (308i) befindet.
- Gruppenantenne nach Anspruch 7, dadurch gekennzeichnet, daß sich in einem Zweig einer Speiseleitung (204k) zwischen dem ersten Blindelement (C1) und dem zweiten Blindelement (C2) mehrere Verzweigungen (206, 208i) hintereinander befinden.
- Gruppenantenne nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, daß die Gruppenantenne eine Gruppe von 2 × 2 Patch-Strahlern (201k) enthält, bei der das Speisenetzwerk (202) einen mit einem einzigen Eingangsanschluß (203) verbundenen gemeinsamen Eingangszweig (205) enthält, welcher sich an einer ersten Verzweigung (206) in zwei getrennte erste Zweige (207i) aufspaltet, wobei sich die getrennten ersten Zweige (207i) an zweiten Verzweigungen (208i) in mit den einzelnen Patch-Strahlern (201k) verbundene Einzelzweige (211k) aufspalten, und wobei die ersten Blindelemente (C1) in einem ersten Abstand (l1) jeweils vor den einzelnen Patch-Strahlern (211k) angeordnet sind und die zweiten Blindelemente (C2) in einem zweiten Abstand (l2) von den ersten Blindelementen (C1) in Richtung hin zum Eingangsanschluß (203) angeordnet sind.
- Gruppenantenne nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, daß die Gruppenantenne eine Gruppe von 1 × 8 Patch-Strahlern (301k) enthält, bei der das Speisenetzwerk (302) einen mit einem Eingangsanschluß (303) verbundenen gemeinsamen Eingangszweig (305) enthält, welcher sich an einer ersten Verzweigungen (306) in zwei getrennte erste Zweige (307i) aufspaltet, wobei sich jeder der getrennten ersten Zweige (307i) an zweiten Verzweigungen (308i) in jeweils zwei getrennte zweite Zweige (309j) aufspaltet und sich jeder der getrennten zweiten Zweige (309j) an dritten Verzweigungen (310j) wiederum in zwei jeweils mit den einzelnen Patch-Strahlern (301k) verbundene getrennte Einzelzweige (311k) aufspaltet, und wobei die ersten Blindelemente (C1) in einem ersten Abstand (l1) jeweils vor den einzelnen Patch-Strahlern (301k) angeordnet sind und die zweiten Blindelemente (C2) in einem zweiten Abstand (l2) vor den ersten Blindelementen (C1) in Richtung hin zum Eingangsanschluß (303) angeordnet sind.
- Gruppenantenne nach Anspruch 10 oder 11, dadurch gekennzeichnet, daß die ersten Blindelemente (C1) in den mit den einzelnen Patch-Strahlern verbundenen getrennten Einzelzweigen (211k; 311k) angeordnet sind.
- Gruppenantenne nach Anspruch 10, dadurch gekennzeichnet, daß ein gemeinsames Blindelement (C2) in dem gemeinsamen Eingangszweig (305) angeordnet ist.
- Gruppenantenne nach Anspruch 11, dadurch gekennzeichnet, daß die ersten Blindelemente (C1) zwischen den zweiten Verzweigungen (308i) und den dritten Verzweigungen (310j) in den getrennten zweiten Zweigen (309j) vorgesehen sind.
- Gruppenantenne nach Anspruch 11 oder 14, dadurch gekennzeichnet, daß die zweiten Blindelemente (C2) zwischen der ersten Verzweigung (306) und den zweiten Verzweigungen (308i) in den getrennten ersten Zweigen (307i) vorgesehen sind.
- Gruppenantenne nach einem der Ansprüche 2 bis 15, dadurch gekennzeichnet, daß die Blindelemente durch Kapazitäten (C1, C2) gebildet sind.
- Gruppenantenne nach Anspruch 16, dadurch gekennzeichnet, daß die Kapazitäten (C1, C2) durch an den Speiseleitungen (204k; 304k) vorgesehene Stichleitungen gebildet sind.
- Gruppenantenne nach einem der Ansprüche 2 bis 15, dadurch gekennzeichnet, daß die Blindelemente durch Induktivitäten gebildet sind.
- Gruppenantenne nach einem der Ansprüche 7 bis 10, dadurch gekennzeichnet, daß die Verzweigungen (206, 208i; 306, 308i, 310j) durch T-Verzweigungen gebildet sind.
- Gruppenantenne nach Anspruch 19, dadurch gekennzeichnet, daß die T-Verzweigungen durch Wilkinson-Teiler, reaktive T-Verzweigungen, Richtkoppler mit Phasenkompensation oder magische T-Verzweigungen gebildet sind.
- Gruppenantenne nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Resonanz-Strahlerelemente durch Dipole gebildet sind.
- Gruppenantenne nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Resonanz-Strahlerelemente durch Schlitzstrahler gebildet sind.
- Gruppenantenne nach einem der Ansprüche 5 bis 22, dadurch gekennzeichnet, daß das Speisenetzwerk (202; 302) symmetrische Verzweigungen enthält.
- Gruppenantenne nach einem der Ansprüche 5 bis 22, dadurch gekennzeichnet, daß das Speisenetzwerk unsymmetrische Verzweigungen enthält.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10120533A DE10120533B4 (de) | 2001-04-26 | 2001-04-26 | Gruppenantenne mit einer Anzahl von Resonanz-Strahlerelementen |
| DE10120533 | 2001-04-26 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1253669A2 true EP1253669A2 (de) | 2002-10-30 |
| EP1253669A3 EP1253669A3 (de) | 2004-01-02 |
| EP1253669B1 EP1253669B1 (de) | 2005-05-11 |
Family
ID=7682854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02006322A Expired - Lifetime EP1253669B1 (de) | 2001-04-26 | 2002-03-21 | Gruppenantenne mit einer Anzahl von Resonanz-Strahlerelementen |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1253669B1 (de) |
| DE (2) | DE10120533B4 (de) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8193990B2 (en) | 2008-07-31 | 2012-06-05 | Denso Corporation | Microstrip array antenna |
| CN111478020A (zh) * | 2020-04-03 | 2020-07-31 | 深圳市大富科技股份有限公司 | 馈电网络以及天线馈电系统 |
| US20240178566A1 (en) * | 2022-11-30 | 2024-05-30 | Zebra Technologies Corporation | Patch Antenna Assembly with Parasitic Patch and Capacitive Loading Elements |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4233607A (en) * | 1977-10-28 | 1980-11-11 | Ball Corporation | Apparatus and method for improving r.f. isolation between adjacent antennas |
| US4686535A (en) * | 1984-09-05 | 1987-08-11 | Ball Corporation | Microstrip antenna system with fixed beam steering for rotating projectile radar system |
| IL82331A (en) * | 1987-04-26 | 1991-04-15 | M W A Ltd | Microstrip and stripline antenna |
| DK168780B1 (da) * | 1992-04-15 | 1994-06-06 | Celwave R F A S | Antennesystem samt fremgangsmåde til fremstilling heraf |
| US5841401A (en) * | 1996-08-16 | 1998-11-24 | Raytheon Company | Printed circuit antenna |
| FI981022L (fi) * | 1998-05-08 | 1999-11-09 | Juha Pyrhoenen | Kestomagneettitahtikonerakenne |
| JP3378513B2 (ja) * | 1998-10-23 | 2003-02-17 | 東光株式会社 | 平面型指向性アンテナ |
-
2001
- 2001-04-26 DE DE10120533A patent/DE10120533B4/de not_active Expired - Fee Related
-
2002
- 2002-03-21 DE DE50203051T patent/DE50203051D1/de not_active Expired - Lifetime
- 2002-03-21 EP EP02006322A patent/EP1253669B1/de not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8193990B2 (en) | 2008-07-31 | 2012-06-05 | Denso Corporation | Microstrip array antenna |
| CN101640316B (zh) * | 2008-07-31 | 2013-07-17 | 株式会社电装 | 微带阵列天线 |
| CN111478020A (zh) * | 2020-04-03 | 2020-07-31 | 深圳市大富科技股份有限公司 | 馈电网络以及天线馈电系统 |
| US20240178566A1 (en) * | 2022-11-30 | 2024-05-30 | Zebra Technologies Corporation | Patch Antenna Assembly with Parasitic Patch and Capacitive Loading Elements |
| US12469975B2 (en) * | 2022-11-30 | 2025-11-11 | Zebra Technologies Corporation | Patch antenna assembly with parasitic patch and capacitive loading elements |
Also Published As
| Publication number | Publication date |
|---|---|
| DE50203051D1 (de) | 2005-06-16 |
| EP1253669A3 (de) | 2004-01-02 |
| DE10120533A1 (de) | 2002-11-14 |
| EP1253669B1 (de) | 2005-05-11 |
| DE10120533B4 (de) | 2007-02-15 |
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