EP0848862A1 - Antennenarray - Google Patents
AntennenarrayInfo
- Publication number
- EP0848862A1 EP0848862A1 EP97927140A EP97927140A EP0848862A1 EP 0848862 A1 EP0848862 A1 EP 0848862A1 EP 97927140 A EP97927140 A EP 97927140A EP 97927140 A EP97927140 A EP 97927140A EP 0848862 A1 EP0848862 A1 EP 0848862A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna array
- decoupling
- array according
- structural element
- reflector
- 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
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
- H01Q1/523—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between antennas of an array
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
- H01Q21/26—Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
Definitions
- the invention relates to an antenna array for the simultaneous reception or simultaneous emission of electromagnetic waves with two linear orthogonal polarizations according to the preamble of claim 1.
- Dual polarized antenna arrays ie radiator arrangements, which dipoles, slots or planar radiator elements for the simultaneous reception or simultaneous emission of electromagnetic waves with two orthogonal linear polarizations, which are supplied to separate and decoupled outputs, are well known.
- a radiating element arrangements at ⁇ may exist play, of several elements in the form of dipoles, slots or planar radiating, as described for example in EP 0685900 Al, or from the preliminary tests "antennas" o
- Ambientennas o
- paragraph, Bibliographisches home stitute Mannhei / Vienna / Zurich, 1970, pages 47 to 50 are known be ⁇ .
- radiators This is for example the case of round radiators with horizontal polarization, the shapes of a Dipolqua- drates or known a Dipolnches having a Kopp men ⁇ lung between the two spatially offset by 90 ° systematic.
- radiator arrangements which are also referred to below as radiator modules, are usually arranged in front of a reflecting surface, the so-called reflector, and in the case of planar antennas a metallic layer of the substrate can simultaneously act as a reflector.
- each transmitting and receiving station can connect ten or more radiator modules together to form an array.
- the radiator modules can be arranged side by side or one below the other. The direction in which the radiator modules are arranged straight or at an angle next to or below one another is to be referred to as the alignment of the antenna array.
- X-polarized arrays designated ⁇ net.
- the neighboring modules couple relatively strongly to one another. Decoupling values of 20 to 25 dB, for example, which are perceived as insufficient, are not uncommon.
- this type of antenna offers the advantage over dual-polarized antennas with horizontal and vertical polarization that transmission to the mobile station is possible on both polarizations.
- Antenna arrays have already been proposed which are used to improve the decoupling between the individual radiators, i.e. provide the radiator modules, partition walls that are aligned perpendicular to the mounting or connecting direction or line between two adjacent radiator modules.
- Experiments have now shown that such a construction in X-polarized arrays usually even leads to a deterioration in the decoupling due to a polarization rotation to be determined, in particular in the case of broadband antennas.
- the antenna array comprises several, i.e. Radiator modules arranged in a plurality of horizontal rows and vertical columns, a rod-shaped reflector element in the manner of a parasitic reflector being arranged in each case between two radiator modules arranged vertically or horizontally next to one another.
- This rod-shaped parasitic reflector element is in each case oriented transversely to the connecting line connecting two adjacent radiator modules.
- These parasitic reflector elements are used for radiation shaping, which is effective even when a single radiator module is used.
- the solution according to the invention is therefore particularly suitable for the mobile radio sector.
- a decoupling device is seen with a novel structural element in front ⁇ between two adjacent radiating element modules.
- This structural element is completely different from that used in e.g. B. vertically aligned antenna arrays used horizontal partitions or rods, exactly the other way around.
- the structural element according to the invention used for decoupling namely has a longitudinal extension which is oriented in the vertical direction of attachment of two arrays arranged next to one another (in principle also in the case of the horizontal attachment direction of two arrays arranged next to one another).
- a decoupling device with a cross-shaped structural element is used between two adjacent X-polarized radiator modules, which consists, for example, of two intersecting individual bars (ie, metallic conductive bars) or of cross-shaped slits in the reflector surface or a metal-conductive surface that is offset parallel to it is introduced.
- the conductive cross-shaped structural elements are conductively connected to one another at their intersection.
- cross-shaped conductive structural elements lie in different planes to one another, but which should essentially not be further than half a wavelength apart.
- Figure la is a schematic plan view of a ntennenarray with two radiating element modules un ⁇ provided therebetween Inventions gema touch decoupling device in plan view ⁇ ;
- Figure lb a side view along the arrow lb in Figure la;
- Figure 2a a modified exemplary embodiment of an antenna array according to the invention with a cross-shaped decoupling device in plan view;
- Figure 2b a rare representation according to the arrow direction Ilb in Figure 2a;
- FIG. 2c a schematic perspective illustration of the exemplary embodiment according to FIG. 2a and FIG. 2b;
- FIG 3a shows a modified from FIG 2a Ausbowungs ⁇ example in which so-called patch radiator as a radiator modules are used;.
- Figure 3b a rare representation of Figure 3a according
- Figure 4a another exemplary embodiment of a
- an antenna array with two radiator modules 1 is shown, which consist of a double dipole arrangement 3. It can be a so-called cross dipole, for example, which spatially surrounds two 90 offset systems comprises, which are fed separately. In a departure from this, however, other double dipole arrangements can also be used, in which the individual dipoles have a square structure in plan view, that is to say in the preferred emission direction (that is, a so-called dipole square). Finally, even further differing radiator modules can be used to receive electromagnetic waves with two linear orthogonal polarizations, as will be explained below using so-called patch radiators.
- the radiator modules 1 are seated in front of a reflector 7 with their dipoles at a distance from the reflector 7.
- the reflector 7 is formed by a metallization 9 on a circuit board 11, on the rear side of which there is a feed network 13 which connects the individual radiator modules separately for the respective polarization.
- the dipoles 3 are mechanically held and electrically contacted via a so-called symmetry 14 with respect to the circuit board 11, i. H. so fed from the board 13.
- the two radiator modules 1 shown are arranged one above the other in a vertical orientation V and again in a parallel orientation to the reflector plane.
- the double dipole arrangement 3 is selected such that a linear polarization of + 45 ° and -45 °, based on the vertical V, can be received with the radiator modules 1.
- a decoupling structural element 17 is also provided in the illustrated exemplary embodiment according to FIGS 17a exists. In the exemplary embodiment shown, this is arranged centrally between the two radiator modules 1, the rod 17a being located in the connection or attachment direction 21 of the radiator modules 1, that is to say on the direct connecting line between the adjacent radiator modules 1.
- the longitudinal or extension component of the decoupling structure element 17 according to the exemplary embodiment according to FIGS. 1a and 1b is ⁇ . than at least 1/4 of the distance between the two adjacent centers or base points 23 of the radiator modules.
- the longitudinal component is preferably more than 40 or 50% of the radiator module distance 25 mentioned.
- the rod 17a is shown arranged at a small distance above the reflector surface 7, and is, that is mechanically held 18 on the reflector 7 through the circuit board 11 and thereby mt the reflector 7 is electrically contacted while standing element via a ⁇ Ab.
- the decoupling structural element could also be further away from the reflector surface 7 than the double dipole arrangement 3, although influences on the radiation diagram with decoupling that is good per se can then be determined when the distance of the decoupling structural element 17 from Reflector surface is more than half as far away as the dipoles of the double dipole arrangement 3.
- the arrangement is preferably such that the conductive decoupling structural element 17 in the form of the rod 17a is not more than 1/8 to 1/4 wavelength from that Reflector level is removed.
- the arrangement can be such that the dipoles 3 ', for example at intervals of 0.1 to 0.5 wavelength, preferably 0.2 to 0.3 wavelength, in particular by 0.25 wavelengths, in front of the reflector surface, the decoupling structural element 17 being at a distance of 0.015 to 0.125 wavelengths, in particular 0.015 to 0.035 wavelengths (ie approx. 1/60 to 1/8, ms - special 1/60 to 1/30 of the wavelength), opposite the reflector surface 7 can have.
- the decoupling structural element 17 may not be in the form of a rod, but rather in the form of a slot made in the top view of FIG. It is also possible to arrange a conductive surface at a distance in front of the reflector surface, in which a corresponding recess is then made, which has a structure with a longitudinal extension, preferably parallel and lying in the region of the connection or attachment direction 21.
- the exemplary embodiment according to FIGS. 2a, 2b and 2c differs from the exemplary embodiment explained above in that no decoupling structural element 17 but a cross-shaped decoupling structural element 17b made of two crossing rods is used for the decoupling structural element 17 .
- a schematic perspective representation of the exemplary embodiment according to FIGS. 2a and 2b is shown in FIG. 2c.
- the rods 27 are almost perpendicular to one another, the two rods being oriented almost parallel to the polarization planes, ie to the dipoles 3 '.
- the cross-shaped decoupling structural element 17b with the rods 27 is also conductive again, the two rods 27 being conductively connected to one another at their intersection 29.
- the longitudinal component in the connecting or mounting direction 21 of the cruciform decoupling structural element 17 thus formed is, for example, 0.25 to 1 wavelength, preferably 0.5 to 0.8 wavelength, in particular by 0.7 wavelength.
- “Long component” is to be understood as the projection onto the vertical, that is to say onto the direct connecting line between two adjacent radiator modules in the direction of attachment. Due to the symmetrical structure, the extension in the transverse direction to the mounting direction 21 is of equal length, but this need not be mandatory.
- patch radiators la are used as radiator modules, as are fundamentally derived from the previous publication ITG technical report 128 "Antennas", VDE-Verlag GmbH, Berlin, Offenbach , Page 259 are known.
- aperture-coupled microstrip patch antennas with a cross-slot or offset-slot arrangement for receiving two orthogonal linear polarizations are known.
- the patch radiators la have a square structure in plan view and are each aligned with their slot arrangement again at a 45 ° angle to the vertical V in order to be able to receive or send both + 45 ° and -45 ° polarizations.
- the cross-shaped decoupling structural element 17 is particularly suitable, as it is based on the exemplary embodiment according to the figures 2a and 2b has been described.
- the exemplary embodiment according to FIGS. 4a and 4b differs from that according to FIGS. 3a and 3b only in that instead of the cross-shaped decoupling structural elements 17b formed in the form of crossing rods 27 and arranged in front of the plane of the reflector 7, a corresponding cross-shaped slot is now used 17c is used as a decoupling structural element, the arrangement and orientation of which can otherwise correspond to the cross-shaped rod arrangement 17b according to FIGS. 3a and 3b.
- the dimensioning can be similar to that of the cruciform rod arrangement according to FIGS. 3a and 3b.
- FIGS. 3a only the mechanical anchoring and support of the dipoles 3 on the reflector or the circuit board have been indicated in FIGS.
- the usual constructions are used, for example, to anchor the individual dipoles to a substrate or a circuit board via the symmetries 14 mentioned and to supply them electrically. If, for example, the dipoles are anchored to the reflector plate and held above them via two webs or arms and are conductively connected to the reflector plate, the dipoles are fed in from the circuit board via separate lines.
- DE 43 02 905 C2 or other dipole devices known therefrom by way of example only.
- FIGS. 3a the mechanical support of the dipoles with respect to the reflector or the circuit board is not shown in more detail.
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Aerials With Secondary Devices (AREA)
- Battery Mounting, Suspending (AREA)
- Waveguide Aerials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19627015A DE19627015C2 (de) | 1996-07-04 | 1996-07-04 | Antennenfeld |
DE19627015 | 1996-07-04 | ||
PCT/EP1997/002922 WO1998001923A1 (de) | 1996-07-04 | 1997-06-05 | Antennenarray |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0848862A1 true EP0848862A1 (de) | 1998-06-24 |
EP0848862B1 EP0848862B1 (de) | 2002-04-17 |
Family
ID=7798955
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97927140A Expired - Lifetime EP0848862B1 (de) | 1996-07-04 | 1997-06-05 | Antennenarray |
Country Status (7)
Country | Link |
---|---|
US (1) | US6025812A (de) |
EP (1) | EP0848862B1 (de) |
KR (1) | KR100454146B1 (de) |
CA (1) | CA2228548C (de) |
DE (2) | DE19627015C2 (de) |
ES (1) | ES2175417T3 (de) |
WO (1) | WO1998001923A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108028462A (zh) * | 2015-11-25 | 2018-05-11 | 康普技术有限责任公司 | 具有解耦单元的相控阵列天线 |
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CN115668644A (zh) * | 2020-04-28 | 2023-01-31 | 康普技术有限责任公司 | 具有包括在其上具有金属层的非金属衬底的反射器组件的基站天线 |
WO2022051906A1 (zh) * | 2020-09-08 | 2022-03-17 | 摩比天线技术(深圳)有限公司 | 解耦元件以及天线 |
CN213753057U (zh) * | 2020-12-31 | 2021-07-20 | 罗森伯格技术有限公司 | 天线振子和天线 |
EP4040602A1 (de) * | 2021-02-08 | 2022-08-10 | Nokia Technologies Oy | Anordnung von patch-antennen |
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US3510876A (en) * | 1967-06-29 | 1970-05-05 | Itt | Vertical beam steering antenna system |
US3541559A (en) * | 1968-04-10 | 1970-11-17 | Westinghouse Electric Corp | Antenna for producing circular polarization over wide angles |
DE7142601U (de) * | 1971-11-11 | 1972-07-13 | Rohde & Schwarz | Richtstrahlfeld fuer zirkulare oder elliptische polarisation zum aufbau von rundstrahlantennen |
GB2265258B (en) * | 1992-03-11 | 1995-09-27 | Siemens Plessey Electronic | Antenna array incorporating a choke |
DE4302905C1 (de) * | 1993-02-02 | 1994-03-17 | Kathrein Werke Kg | Richtantenne, insbesondere Dipolantenne |
GB9410994D0 (en) * | 1994-06-01 | 1994-07-20 | Alan Dick & Company Limited | Antennae |
SE9404312L (sv) * | 1994-12-12 | 1996-04-01 | Teracom Components Ab | Anordning vid antennsystem för att bryta högfrekventa elströmmar i den bärande konstruktionen |
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1996
- 1996-07-04 DE DE19627015A patent/DE19627015C2/de not_active Expired - Fee Related
-
1997
- 1997-06-05 US US09/029,198 patent/US6025812A/en not_active Expired - Lifetime
- 1997-06-05 DE DE59707037T patent/DE59707037D1/de not_active Expired - Lifetime
- 1997-06-05 ES ES97927140T patent/ES2175417T3/es not_active Expired - Lifetime
- 1997-06-05 KR KR10-1998-0701162A patent/KR100454146B1/ko not_active IP Right Cessation
- 1997-06-05 CA CA002228548A patent/CA2228548C/en not_active Expired - Fee Related
- 1997-06-05 WO PCT/EP1997/002922 patent/WO1998001923A1/de active IP Right Grant
- 1997-06-05 EP EP97927140A patent/EP0848862B1/de not_active Expired - Lifetime
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108028462A (zh) * | 2015-11-25 | 2018-05-11 | 康普技术有限责任公司 | 具有解耦单元的相控阵列天线 |
Also Published As
Publication number | Publication date |
---|---|
DE19627015A1 (de) | 1998-01-08 |
KR100454146B1 (ko) | 2005-01-24 |
CA2228548A1 (en) | 1998-01-15 |
ES2175417T3 (es) | 2002-11-16 |
WO1998001923A1 (de) | 1998-01-15 |
DE59707037D1 (de) | 2002-05-23 |
EP0848862B1 (de) | 2002-04-17 |
KR19990037683A (ko) | 1999-05-25 |
DE19627015C2 (de) | 2000-07-13 |
US6025812A (en) | 2000-02-15 |
CA2228548C (en) | 2003-01-14 |
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