EP1202387A2 - Planarantenne mit verbesserter Richtcharakteristik - Google Patents
Planarantenne mit verbesserter Richtcharakteristik Download PDFInfo
- Publication number
- EP1202387A2 EP1202387A2 EP01124351A EP01124351A EP1202387A2 EP 1202387 A2 EP1202387 A2 EP 1202387A2 EP 01124351 A EP01124351 A EP 01124351A EP 01124351 A EP01124351 A EP 01124351A EP 1202387 A2 EP1202387 A2 EP 1202387A2
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- EP
- European Patent Office
- Prior art keywords
- antenna elements
- feed
- columns
- antenna
- column
- 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
- 239000011159 matrix material Substances 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 claims description 3
- 230000010287 polarization Effects 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 239000004020 conductor Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005388 cross polarization Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000003362 replicative effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0087—Apparatus or processes specially adapted for manufacturing antenna arrays
-
- 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
- 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
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/22—Antenna units of the array energised non-uniformly in amplitude or phase, e.g. tapered array or binomial array
Definitions
- the invention relates to a planar antenna with a Plurality of antenna elements forming an orthogonal Matrix essentially without gaps at crossing points of N columns and M rows are arranged, where the antenna elements forming at least one middle one Column mirror-symmetrical with respect to one in the direction the symmetry line of the columns is distributed are.
- a planar antenna of the type mentioned at the outset is, for example known from published patent application DE 198 55 115 A1. It is used, for example, to receive satellite broadcast signals in the frequency range from 10.7 to 12.75 GHz.
- the planar antennas point towards the parabolic antennas Number of advantages; for example, they offer less Attack area for the wind, are not as voluminous and find wider ones due to their better visual impression Acceptance.
- planar antennas are well known Parabolic mirror LNB antennas have some disadvantages with the electrical Characteristics, for example a lower one Cross polarization decoupling, poor directional characteristics and stronger side lobes.
- Improved planar antenna described was u. a. through a special design of the patch elements the antenna elements an improved cross polarization decoupling and side lobe suppression achieved.
- the multilayer known from the published patent application Antenna arrangement includes, among others, the satellite facing upper metallic layer, in the patch elements are trained.
- the patch elements are from, for example rectangular shape.
- the level of the patch elements is metallic Conductor tracks formed, which are the antenna elements Form dining feed line network.
- the individual multilayer antenna elements are in one level arranged in a matrix in N columns and M rows, where essentially each of the N columns M antenna elements having.
- a schematic diagram of the arrangement of the antenna elements is shown in Figure 1. After appropriate alignment on the satellites, the lines run in the azimuth direction and the columns in the direction of elevation.
- the single ones Antenna elements are preferably equidistant both arranged in the azimuth direction as well as in the elevation direction, the distances in the two directions different could be.
- the known patch planar antenna arrangement is the different in the two directions Spacing of the antenna elements also partially the different distances between the feed line networks attributed to the upper level of the patch elements.
- a planar antenna is, among other things, due to its radiation characteristics labeled, which results from the product the characteristics of the individual antenna element (at Use of the same antenna elements) and a group factor (a function dependent on the solid angle).
- the Total number of antenna elements determines the gain of the Antenna while the number in the azimuth or elevation direction arranged elements the opening angle in the respective Direction determined.
- the radiation pattern (Radiation diagram) contains zeros and side lobes (Maxima), which are introduced by the group factor. It has been found that for a complete, rectangular Matrix the attenuation at the first side lobe about 13 dB is.
- the object of the invention is therefore to make the damping undesirable Signals and the suppression of interference signals to improve.
- the Planar antenna has a plurality of antenna elements, essentially forming an orthogonal matrix arranged at the intersection of N columns and M rows are.
- An "essentially gapless" arrangement denotes an arrangement in which between two in one Column or row of adjacent antenna elements in the Usually there is no unoccupied crossing point, but there is it is possible that within the matrix due to constructive Exceptions (e.g. ordering a Feed point) some crossing points are unoccupied.
- the Antenna elements are forming at least one middle one Column mirror-symmetrical with respect to one in the direction the symmetry line of the columns is distributed.
- the planar antenna points at least one middle column in the sense of this definition at least with an even number of columns two middle columns.
- the at least one middle column has a number of M antenna elements.
- the number of Antenna elements in each column are not larger than the number of antenna elements in the closer to the line of symmetry lying adjacent column. This means, that the number of antenna elements starting from the center the planar antenna decreases towards the outside, but several Adjacent columns have an equal number of antenna elements can have.
- An exception to this basic Rule can by the aforementioned constructive exception a feed point in the middle of the matrix of antenna elements arise when a few antenna elements at this point be omitted. It has been shown that due to the symmetrical distribution of the number of antenna elements in each column, which decreases towards the outside, one Novel planar antenna with fewer side lobes in Direction of the rows of the matrix is created.
- the antenna elements are preferably additionally mirror-symmetrical with respect to a line Line of symmetry arranged. This means that near the line of symmetry arranged middle lines the largest number of antenna elements have and at least the two arranged outside Lines a smaller number of antenna elements exhibit. This creates a planar antenna whose side lobe attenuation is also improved in the column direction, that means that the preferred antenna arrangement has a corresponding one Alignment to the satellite increased side lobe damping both in the azimuth direction and in the direction of the elevation.
- the dependence of the number of antenna elements in the Columns from the distance from the line of symmetry represents in each If it is a monotonically falling function, that is, the number the antenna elements of a column further out is not greater than the number of antenna elements one inner column. In one embodiment can the number of antenna elements in each column each less than the number of antenna elements in the closer the adjacent column lying the line of symmetry.
- the number is Columns N an even number.
- the number of antenna elements in a column either equal to the number or by a number x less than the number of antenna elements in the neighboring one closer to the line of symmetry Column.
- each have n neighboring ones Columns the same number of antenna elements.
- the number the column n is therefore equal to 2 * n times that on the next larger whole number rounded quotient M / x.
- the antenna elements are preferably mirror-symmetrical in terms of one between two middle ones Further symmetry line lying in rows, so that the antenna elements within a rhombus-shaped Outside contour are arranged.
- a feed network with a feed point and a branched network of feed lines leading from this feed point to all antenna elements is provided, the network being designed in such a way that there is an essentially equally long route from the feed point to each Antenna element results.
- the design of such a feed network could be implemented symmetrically in a relatively simple manner.
- implementation becomes difficult in the case of the antenna arrangement according to the invention, in which outer columns and rows have a smaller number of antenna elements.
- the network of feed lines is formed by (a) a fictitious rectangular arrangement of N columns, each with M antenna elements, is assumed (b) a fictitious feed network is constructed by (b1) for all antenna elements of the N columns and M rows, the feed lines of two antenna elements adjacent in one row or column a first group are brought together, each forming a feed line branching point, from which feed lines of essentially the same length lead to the antenna elements, (b2) for all first groups, the feed lines of in each case two adjacent first groups in the column or row direction to a further one Group are brought together, each with a further meal line branching point is formed, from which feed lines of essentially the same length lead to the feed line branching points previously formed, (b3) this merging is repeated for all further groups until the feed lines of all antenna elements are brought together to the feed point, (b4)
- each eliminated branch of the fictional Feed network through an effect of the eliminated Branch (cable + antenna element) replicating weight replaced the weight at that feed junction point of the dining network from which a direct branch line to that fictitious feed line branch point leads to the eliminated branch ended.
- the addition of the compensation weights improved the directional pattern by turning the main lobe is avoided.
- FIG. 1 schematically shows the known arrangement of antenna elements already described in the introduction.
- the planar antenna arrangement 1 has a multiplicity of antenna elements 2 which are arranged at crossing points of orthogonal rows and columns.
- the antenna elements are shown as circular spots.
- the antenna elements can be of any suitable shape, for example the rectangular shape described in the above-mentioned laid-open publication DE 198 55 115 A1.
- the group antenna 1 consists of N columns, each with M antenna elements. If the antenna 1 is aligned towards a satellite, the rows extend in the azimuth direction, while the columns are aligned in the direction of the elevation.
- the antenna elements 2 are arranged equidistantly, the distance d a of the antenna elements 2 in the azimuth direction being different from the distance d e of the antenna elements 2 in the direction of the elevation.
- FIG. 2 illustrates a basic principle of the arrangement of the antenna elements in the planar antenna according to the invention.
- the antenna elements are arranged in columns, each column having a predetermined number of antenna elements.
- the columns are again arranged equidistantly with the distance d a .
- the two outer columns 3 have a number A of antenna elements.
- Columns 4 adjacent to the outer columns each comprise B antenna elements.
- the subsequent columns 5 arranged further inside each have C antenna elements.
- This symmetry continues inwards, so that a symmetry line 6 extending in the column direction or in the direction of the elevation is formed for the arrangement of the antenna elements.
- the number A, B, C, ... of the antenna elements in each column increases in the direction of the line of symmetry 6, the number of antenna elements in a column being no greater than the number of antenna elements in a column closer to the line of symmetry 6.
- FIG. 3 shows a schematic representation of a preferred arrangement of columns 7 of antenna elements, the number of which is distributed symmetrically to the line of symmetry 6.
- the columns closest to the line of symmetry 6 have a maximum number M of antenna elements.
- the number of antenna elements then decreases outwards from column to column by x antenna elements in each case.
- the columns are again arranged equidistantly with the distance d a .
- Figures 2 and 3 are neither the individual antenna elements still their alignment is shown in the row direction. But it should be noted that the neighboring Antenna elements of the neighboring columns (so far present) in approximately the same vertical position (Elevation). In a preferred embodiment the antenna elements are also vertical Direction symmetrically arranged so that there is an orthogonal further line of symmetry between the middle lines or on the middle row.
- Figure 4 shows such a preferred arrangement of the Antenna elements in which the number M of lines and the Number N of columns are even numbers and the number of Antenna elements from column to column to the outside by each decreases two antenna elements. This results in the Figure 4 shown rhombus shape.
- Figure 5 illustrates the formation of the feed lines or the symmetrically branching feed line network, for simplification only the feed lines for an excitation direction (e.g. vertical) are.
- First a fictional arrangement of antenna elements in N columns and M rows where each column has M elements. The inferred from it, Antenna elements left in accordance with the invention are shown shaded in gray, while the later omitted antenna elements of the fictitious arrangement are illustrated by a dotted outline. outgoing of this fictitious overall arrangement of the antenna elements are two in each across the entire matrix Column direction adjacent antenna elements combined, that is, the feed lines of these are combined Antenna elements at a first branch point merged such that the lengths of the two feed lines from this branch point to the antenna elements are the same.
- FIG. 6 shows a feeder network of one level for a preferred embodiment of the invention Planar antenna.
- FIG. 6 shows the preferred embodiment of the feed network for a polarization direction.
- the feeding point is about in the middle of the symmetrical arrangement, at this point a group of four antenna elements was omitted.
- On the right side of Figure 6 an enlarged section is shown. In this enlargement are to compensate for the effect of the omitted antenna elements inserted weights 8 illustrated.
- These weights are called widenings of the Conductor lines of the feed line network visible. they are each formed at the feed line branching points 9, each of which has a direct branch line 10 to those Points 11 leads to where the fictional complete Feed line network each branch to the omitted Group of antenna elements.
- the widened Conductor tracks 8 begin at the respective branch points 9 and extend against the direction of direct branch lines 10.
Abstract
Description
Claims (13)
- Planarantenne mit einer Mehrzahl von Antennenelementen (2), die unter Bildung einer orthogonalen Matrix im wesentlichen lückenlos an Kreuzungspunkten von N Spalten und M Zeilen angeordnet sind,
wobei die Antennenelemente (2) unter Bildung wenigstens einer mittleren Spalte spiegelsymmetrisch in Bezug auf eine in Richtung der Spalten verlaufende Symmetrielinie (6) verteilt angeordnet sind,
dadurch gekennzeichnet,daß die wenigstens eine mittlere Spalte eine Anzahl von M Antennenelementen aufweist und zumindest die beiden außen angeordneten Spalten eine geringere Anzahl von Antennenelementen aufweisen unddaß die Anzahl der Antennenelemente in jeder Spalte jeweils nicht größer als die Anzahl der Antennenelemente in der näher an der Symmetrielinie liegenden benachbarten Spalte ist. - Planarantenne nach Anspruch 1, dadurch gekennzeichnet, daß die Antennenelemente zusätzlich spiegelsymmetrisch in Bezug auf eine in Richtung der Zeilen verlaufende Symmetrielinie angeordnet sind.
- Planarantenne nach Anspruch 1, dadurch gekennzeichnet, daß die Anzahl der Antennenelemente in jeder Spalte jeweils geringer als die Anzahl der Antennenelemente in der näher an der Symmetrielinie liegenden benachbarten Spalte ist.
- Planarantenne nach Anspruch 1, dadurch gekennzeichnet, daß die Spalten von Antennenelementen äquidistant in einem ersten Abstand (da) voneinander angeordnet sind und daß die Zeilen von Antennenelementen äquidistant in einem zweiten Abstand (de) voneinander angeordnet sind.
- Planarantenne nach Anspruch 1, dadurch gekennzeichnet, daß die Anzahl der Spalten N eine gerade Zahl ist.
- Planarantenne nach Anspruch 5, dadurch gekennzeichnet,daß die Anzahl der Antennenelemente in einer Spalte entweder gleich der Anzahl oder um eine Zahl x geringer als die Anzahl der Antennenelemente in der näher an der Symmetrielinie liegenden benachbarten Spalte ist unddaß jeweils n benachbarte Spalten die gleiche Anzahl von Antennenelementen haben, wobei die Anzahl der Spalten N gleich dem 2*n-fachen des auf die nächstgrößere ganze Zahl gerundeten Quotienten M/x ist.
- Planarantenne nach Anspruch 6, dadurch gekennzeichnet, daß x eine gerade Zahl ist.
- Planarantenne nach Anspruch 7, dadurch gekennzeichnet, daß die Antennenelemente spiegelsymmetrisch in Bezug auf eine zwischen zwei mittleren Zeilen liegende weitere Symmetrielinie verteilt angeordnet sind, so daß die Antennenelemente innerhalb einer rhombusförmigen Außenkontur angeordnet sind.
- Planarantenne nach Anspruch 8, dadurch gekennzeichnet, daß N = M = 32, x = 4 und n = 2 sind.
- Planarantenne nach Anspruch 1, gekennzeichnet durch ein Speisenetzwerk mit einem Speisepunkt und einem von diesem Speisepunkt zu sämtlichen Antennenelementen führenden verzweigten Netzwerk von Speiseleitungen, das so ausgebildet ist, daß sich ein im wesentlichen gleich langer Leitweg von dem Speisepunkt zu jedem Antennenelement ergibt.
- Planarantenne nach Anspruch 10, dadurch gekennzeichnet,daß N = 2a und M = 2b ist, wobei a und b ganze Zahlen größer als 1 sind, unddaß das Netzwerk von Speiseleitungen ausgebildet wird, indema) von einer fiktiven rechteckigen Anordnung von N Spalten mit jeweils M Antennenelementen ausgegangen wird,b) ein fiktives Speisenetzwerk konstruiert wird, indemb1) für sämtliche Antennenelemente der N Spalten und M Zeilen die Speiseleitungen von jeweils zwei in einer Zeile oder Spalte benachbarten Antennenelementen zu jeweils einer ersten Gruppe zusammengeführt werden, wobei jeweils ein Speiseleitungsverzweigungspunkt gebildet wird, von dem im wesentlichen gleich lange Speiseleitungen zu den Antennenelementen führen,b2) für sämtliche ersten Gruppen die Speiseleitungen von jeweils zwei in Spalten- oder Zeilenrichtung benachbarten ersten Gruppen zu jeweils einer weiteren Gruppe zusammengeführt werden, wobei jeweils ein weiterer Speiseleitungsverzweigungspunkt gebildet wird, von dem im wesentlichen gleich lange Speiseleitungen zu den zuvor gebildeten Speiseleitungsverzweigungspunkten führen,b3) für sämtliche weiteren Gruppen dieses Zusammenführen sooft wiederholt wird, bis die Speiseleitungen sämtlicher Antennenelemente an dem Speisepunkt zusammengeführt sind,b4) aus der so gebildeten fiktiven Anordnung von N*M Antennenelementen diejenigen Antennenelemente eliminiert werden, die in der Planarantenne nicht enthalten sind, undb5) diejenigen Zweige der fiktiven Speiseleitungen, die ausschließlich zu den im Schritt b4) eliminierten Antennenelementen führen, eliminiert werden, undc) das Netzwerk von Speiseleitungen entsprechend dem im Schritt b) gebildeten fiktiven Speisenetzwerk ausgebildet wird.
- Planarantenne nach Anspruch 8, dadurch gekennzeichnet,daß N = 2a und M = 2b ist, wobei a und b ganze Zahlen größer als 1 sind, unddaß das Netzwerk von Speiseleitungen ausgebildet wird, indema) von einer fiktiven rechteckigen Anordnung von N Spalten mit jeweils M Antennenelementen ausgegangen wird,b) ein fiktives Speisenetzwerk konstruiert wird, indemb1) für sämtliche Antennenelemente der N Spalten und M Zeilen die Speiseleitungen von jeweils zwei in einer Zeile oder Spalte benachbarten Antennenelementen zu jeweils einer ersten Gruppe zusammengeführt werden, wobei jeweils ein Speiseleitungsverzweigungspunkt gebildet wird, von dem im wesentlichen gleich lange Speiseleitungen zu den Antennenelementen führen,b2) für sämtliche ersten Gruppen die Speiseleitungen von jeweils zwei in Spalten- oder Zeilenrichtung benachbarten ersten Gruppen zu jeweils einer weiteren Gruppe zusammengeführt werden, wobei jeweils ein weiterer Speiseleitungsverzweigungspunkt gebildet wird, von dem im wesentlichen gleich lange Speiseleitungen zu den zuvor gebildeten Speiseleitungsverzweigungspunkten führen,b3) für sämtliche weiteren Gruppen dieses Zusammenführen sooft wiederholt wird, bis die Speiseleitungen sämtlicher Antennenelemente an dem Speisepunkt zusammengeführt sind,b4) aus der so gebildeten fiktiven Anordnung von N*M Antennenelementen diejenigen Antennenelemente entfernt werden, die in der Planarantenne nicht enthalten sind, undb5) diejenigen Zweige der fiktiven Speiseleitungen, die ausschließlich zu den im Schritt b4) eliminierten Antennenelementen führen, eliminiert werden, undc) das Netzwerk von Speiseleitungen entsprechend dem im Schritt b) gebildeten fiktiven Speisenetzwerk ausgebildet wird, wobei die sich über die rhombusförmige Außenkontur hinaus erstreckenden Leitungsabschnitte des fiktiven Speisenetzwerks durch etwa gleich lange Leitungsabschnitte (12, 13) innerhalb der rhombusförmige Außenkontur ersetzt werden.
- Planarantenne nach Anspruch 11 oder 12, dadurch gekennzeichnet, daß im Schritt b):b6) jeder eliminierte Zweig des fiktiven Speisenetzwerks durch ein die Wirkung des eliminierten Zweigs nachbildendes Gewicht (8) ersetzt wird, wobei das Gewicht (8) an demjenigen Speiseleitungsverweigungspunkt (9) des Speisenetzwerks hinzugefügt wird, von dem eine direkte Zweigleitung (10) zu dem fiktiven Speiseleitungsverweigungspunkt (11), an dem der eliminierte Zweig endete, führt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10052748 | 2000-10-25 | ||
DE10052748A DE10052748A1 (de) | 2000-10-25 | 2000-10-25 | Planarantenne mit verbesserter Richtcharakteristik |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1202387A2 true EP1202387A2 (de) | 2002-05-02 |
EP1202387A3 EP1202387A3 (de) | 2003-05-07 |
EP1202387B1 EP1202387B1 (de) | 2004-08-25 |
Family
ID=7660924
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01124351A Expired - Lifetime EP1202387B1 (de) | 2000-10-25 | 2001-10-23 | Planarantenne mit verbesserter Richtcharakteristik |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1202387B1 (de) |
AT (1) | ATE274756T1 (de) |
DE (2) | DE10052748A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008008387A1 (de) | 2008-02-09 | 2009-08-27 | Symotecs Ag | Antennensystem für mobile Satellitenkommunikation |
US9444148B2 (en) | 2009-08-06 | 2016-09-13 | Indian Space Research Organisation Of Isro | Printed quasi-tapered tape helical array antenna |
EP3830901A4 (de) * | 2018-07-31 | 2022-05-11 | Quintel Cayman Limited | Geteiltes diamantantennenelement zur steuerung des azimutmusters in verschiedenen anordnungskonfigurationen |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4686535A (en) * | 1984-09-05 | 1987-08-11 | Ball Corporation | Microstrip antenna system with fixed beam steering for rotating projectile radar system |
DE19523805A1 (de) * | 1994-06-29 | 1996-01-11 | Ma Com Inc | Mikrostreifenantenne |
US6031491A (en) * | 1996-12-12 | 2000-02-29 | Thomson-Csf | Broadband printed array antenna |
DE19850895A1 (de) * | 1998-11-05 | 2000-05-11 | Pates Tech Patentverwertung | Mikrowellenantenne mit optimiertem Kopplungsnetzwerk |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19742090A1 (de) * | 1997-09-24 | 1999-03-25 | Bosch Gmbh Robert | Ebene Mikrowellenantenne |
DE19855115A1 (de) * | 1998-11-30 | 2000-06-08 | Technisat Elektronik Thueringe | Mehrlagige Antennenanordnung |
-
2000
- 2000-10-25 DE DE10052748A patent/DE10052748A1/de not_active Withdrawn
-
2001
- 2001-10-23 DE DE50103383T patent/DE50103383D1/de not_active Expired - Fee Related
- 2001-10-23 AT AT01124351T patent/ATE274756T1/de not_active IP Right Cessation
- 2001-10-23 EP EP01124351A patent/EP1202387B1/de not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4686535A (en) * | 1984-09-05 | 1987-08-11 | Ball Corporation | Microstrip antenna system with fixed beam steering for rotating projectile radar system |
DE19523805A1 (de) * | 1994-06-29 | 1996-01-11 | Ma Com Inc | Mikrostreifenantenne |
US6031491A (en) * | 1996-12-12 | 2000-02-29 | Thomson-Csf | Broadband printed array antenna |
DE19850895A1 (de) * | 1998-11-05 | 2000-05-11 | Pates Tech Patentverwertung | Mikrowellenantenne mit optimiertem Kopplungsnetzwerk |
Also Published As
Publication number | Publication date |
---|---|
ATE274756T1 (de) | 2004-09-15 |
EP1202387A3 (de) | 2003-05-07 |
DE10052748A1 (de) | 2002-05-29 |
DE50103383D1 (de) | 2004-09-30 |
EP1202387B1 (de) | 2004-08-25 |
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