EP2218119B1 - Reflecteur a etage variable destine a une antenne commandee par largeur de faisceau a azimut - Google Patents
Reflecteur a etage variable destine a une antenne commandee par largeur de faisceau a azimut Download PDFInfo
- Publication number
- EP2218119B1 EP2218119B1 EP08847232A EP08847232A EP2218119B1 EP 2218119 B1 EP2218119 B1 EP 2218119B1 EP 08847232 A EP08847232 A EP 08847232A EP 08847232 A EP08847232 A EP 08847232A EP 2218119 B1 EP2218119 B1 EP 2218119B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reflector
- radiators
- antenna
- configuration
- beam width
- 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.)
- Not-in-force
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Classifications
-
- 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
- H01Q3/01—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 shape of the antenna or antenna system
-
- 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
- H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
Definitions
- the present invention relates in general to communication systems and components. More particularly the present invention is directed to antennas and antenna arrays employed in wireless communications systems.
- Modern wireless antenna implementations generally include a plurality of radiating elements that may be arranged over a reflector plane defining a radiated (and received) signal beam width and azimuth scan angle.
- Azimuth antenna beam width can be advantageously modified by varying the amplitude and phase of an RF signal applied to respective radiating elements.
- Azimuth antenna beam width has been conventionally defined by Half Power Beam Width (HPBW) of the azimuth beam relative to a bore sight of such antenna array.
- HPBW Half Power Beam Width
- radiating element positioning is important to the overall beam width control as such antenna systems rely on accuracy of amplitude and phase angle of RF signal supplied to each radiating element. This places a requirement for a great deal of tolerance and accuracy on a mechanical phase shifter to provide the required signal division between various radiating elements over various azimuth bandwidth settings.
- Real world applications often call for an antenna array with beam down tilt and azimuth beam width control that may incorporate a plurality of mechanical phase shifters to achieve such functionality.
- Such highly functional antenna arrays are typically retrofitted in place of simpler, lighter and less functional antenna arrays while weight and wind loading of the newly installed antenna array can not be significantly increased.
- Accuracy of a mechanical phase shifter generally depends on its construction materials.
- highly accurate mechanical phase shifter implementations require substantial amounts of relatively expensive dielectric materials and rigid mechanical support. Such construction techniques result in additional size and weight not to mention being relatively expensive.
- mechanical phase shifter configurations that have been developed utilizing lower cost materials may fail to provide adequate passive intermodulation suppression under high power RF signal levels.
- the present invention provides an antenna for a wireless network comprising a first generally planar reflector having a first plurality of radiators mounted thereon and a second generally planar reflector having a second plurality of radiators mounted thereon, the second generally planar reflector configured in a variable partial overlapping relation with the first generally planar reflector.
- At least one of the first and second generally planar reflectors is movable relative to the other reflector in a direction generally parallel to the reflector plane and the radiators mounted on the reflectors are reconfigurable from a first configuration where the radiators are all aligned to a second configuration where the radiators are staggered relative to each other.
- at least one of the first and second reflectors has a comb-like structure having a plurality of notched portions configured in alignment with the radiators on the other reflector.
- the first and second plurality of radiators comprise radiating elements extending perpendicular to the plane of the respective reflectors. At least one of the first and second reflectors has a comb-like structure having a plurality of notched portions configured in alignment with the radiators on the other reflector.
- the first and second plurality of radiators are arranged in first and second columns respectively on the first and second reflectors.
- the first and second plurality of radiators in each of the first and second columns are preferably equally spaced along the length direction of the columns. In the first configuration the first and second columns may be aligned along a centerline and the first and second plurality of radiators are equally spaced apart a distance Vs.
- the operating frequency of the antenna may be between 1.7 GHz and 2.2 GHz and the spacing Vs is between about 75 to 125 mm.
- the spacing HS 1 and HS 2 may be variable between 0 and 40 mm.
- the present invention provides a variable azimuth beam width antenna comprising a reflector structure, the reflector structure comprising first and second generally planar reflector panels each having plural alternating extensions and notched portions forming a comb shape, wherein the first and second generally planar reflector panels are interdigitated to form a generally rectangular shape for the reflector structure and wherein one or both of the panels are movable relative to the other to provide a variable overlap.
- the antenna further comprises a first plurality of radiators mounted on the first reflector panel in the plural extensions thereof and a second plurality of radiators mounted on the second reflector panel in the plural extensions thereof.
- Signal azimuth beam width is variable based on variable relative positioning of the first plurality of radiators and the second plurality of radiators as the first and second reflector panel overlap is varied.
- the reflector structure has a variable width as the first and second reflector panel overlap is varied.
- the operating frequency of the antenna may be between 1.7 GHz and 2.2 GHz and the reflector structure width is variable between about 120 mm and 200 mm.
- the beam width of the antenna may be variable between about 100 degrees and 47 degrees.
- the first plurality of radiators mounted on the first reflector panel are preferably arranged in a first column aligned perpendicular to the azimuth direction and the second plurality of radiators mounted on the second reflector panel are preferably arranged in a second column also aligned perpendicular to the azimuth direction and the spacing of the first and second columns is varied as the reflector panel overlap is varied.
- the aspect and its preferred embodiments/examples are related to each other according to the following:
- the present invention provides a method of adjusting signal beam width in an antenna having first and second generally comb shaped planar reflector panels each having a plurality of radiators mounted thereon.
- the method comprises adjusting the position of at least one of the panels by moving the panel in a direction generally parallel to the plane of the reflector to a first configuration having plural interdigitated first and second radiators on the first and second reflector panels with a first spacing to provide a first signal beam width.
- the method further comprises adjusting the position of at least one of the panels by moving the panel in a direction generally parallel to the plane of the reflector to a second configuration having interdigitated first and second radiators with a second different spacing to provide a second signal beam width.
- the beam width of the antenna may be variable between about 100 degrees and 47 degrees.
- the first and second reflector panels together preferably form a rectangular reflector structure having a width which is variable, for example between about 120 mm and 200 mm.
- the present invention provides an azimuth beam width variable antenna array for a wireless network system and related methods of beam width control.
- Figure 1 shows a front view of a dual polarization, staggerable reflector antenna array, 100, according to an exemplary implementation, which utilizes twin element staggerable reflector plates or panels 105a and 105b. As may be seen these panels each have a comb shape which together form an interdigitated structure. More specifically, the two reflector plates 105a and 105b are oriented in a vertical orientation (Z-dimension) of the antenna array together forming a rectangular shaped reflector 105. Reflector plates 105a and 105b may, for example, consist of electrically conductive plates suitable for use with Radio Frequency (RF) signals. Further, reflector plates 105a and 105b when combined together are shown as a featureless rectangle, but in actual practice additional details such as outer perimeter augmentation (not shown) may be added to aid reflector performance and HPBW control.
- RF Radio Frequency
- an antenna array, 100 contains a plurality of RF radiating (110, 120, 130, 140 -to- 220) elements preferably arranged both vertically and horizontally along operationally defined vertical axis P0 which corresponds to a minimum stagger distance O1.
- RF radiating (110, 120, 130, 140 -to- 220) elements are preferably equidistantly spaced a distance Vs as shown; alternatively unequal elements groupings and offset vertical arrangements can also be employed.
- the illustrated embodiment utilizes 12 radiating elements, however it shall be understood that the number of radiating elements can be greater or fewer depending on performance requirements and other implementation requirements.
- the first group of RF radiating (120, 140, 160, 180, 200, and 220) elements are rigidly attached (122, 142, 162, 182, 202, and 222) to the left side reflector plate 105a along P1 axis common to the reflector plate 105a.
- the second group of RF radiating (110, 130, 150, 170, 190, and 210) elements are rigidly attached (112, 132, 152, 172, 192, and 212) to the right side reflector plate 105b along P2 axis common to the reflector plate 105b.
- Both left 105a and right reflector plates utilize a comb style shape with extensions and notched portions which are interdigitated to allow for interference free radiating element positioning while providing a substantially homogenous reflector plane.
- left reflector plate 105a is set to overlay right reflector plate 105b.
- the two reflector plates 105a and 105b are equidistantly movable about vertical center axis P0, in opposite directions having identical lateral displacement HS1 & HS2.
- One skilled in the art can readily implement a simple electro-mechanical actuator (not shown) that can provide such controlled lateral movement.
- unequal shifting about center axis P0 is possible, such that displacement
- O1 maximum
- overall combined antenna reflector 105 dimension W1 minimum dimension.
- VS dimension is defined by the overall length of the reflector 105 plane which defines the effective antenna aperture.
- RF radiator, 105 together with a plurality of folded dipole (110, 120, 130, 140 -to- 250) radiating elements forms an antenna array useful for RF signal transmission and reception.
- alternative radiating elements such as taper slot, horn, aperture coupled patches (APC), etc., can be used as well.
- a cross section datum A-A and B-B will be used to detail constructional and operational aspects relating to reflector plates 105a and 105b relative movement with respect to each other. Drawing details of A-A and B-B datum can be found in Figure 3A .
- Minimum reflector overlap O1 dimension is preferably not Omm, but has an additional mechanical safety margin to prevent reflector planes from disengaging each other at minimum overlap settings.
- Figure 3B provides cross sectional views along A1-A1 and B1-B1 datum of Figure 2 .
- Figures 4 , 5 , and 6 provide azimuth radiation patterns for different stagger settings.
- Preferred dimensions for a 1.7 GHz to 2.2 GHz embodiment are shown in Table 1. Other frequency ranges and dimensions are also possible, however.
- Table 1 Element Dimension Min (mm) Max (mm) Typical (mm) Vertical radiating element spacing Vs 75 125 Reflector Width W1 120 200 Reflector movement HS1, HS2 0 40 Overlap O1 20 60 HPBW HPBW 99.7 deg 46.9 deg
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- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Claims (14)
- Antenne (100) pour un réseau sans fil, comprenant :un premier réflecteur généralement plan (105a) sur lequel est montée une première pluralité de radiateurs (120, 140, 160, 180, 200, 220) ; etun deuxième réflecteur généralement plan (105b) sur lequel est montée une deuxième pluralité de radiateurs (110, 130, 150, 170, 190, 210), ledit deuxième réflecteur généralement plan (105b) présentant une relation de recouvrement partiel variable avec ledit premier réflecteur généralement plan (105a) ;au moins un des premier et deuxième réflecteurs généralement plans (105a, 105b) étant mobile par rapport à l'autre dans une direction généralement parallèle à son plan, les radiateurs (110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 210, 220) montés sur les réflecteurs (105a, 105b) étant reconfigurables pour passer d'une première configuration dans laquelle ils sont tous alignés à une deuxième configuration dans laquelle ils sont décalés les uns par rapport aux autres ; etau moins un des premier (105a) et deuxième (105b) réflecteurs présentant une structure en peigne dotée d'une pluralité de parties à encoche agencées en alignement sur les radiateurs sur l'autre réflecteur.
- Antenne (100) selon la revendication 1, les première (120, 140, 160, 180, 200, 220) et deuxième (110, 130, 150, 170, 190, 210) pluralités de radiateurs comprenant des éléments rayonnants s'étendant perpendiculairement au plan des réflecteurs (105a, 105b) respectifs.
- Antenne selon la revendication 1, les première (120, 140, 160, 180, 200, 220) et deuxième (110, 130, 150, 170, 190, 210) pluralités de radiateurs étant agencées dans des première et deuxième colonnes respectivement sur les premier (105a) et deuxième (105b) réflecteurs.
- Antenne (100) selon la revendication 3, les première et deuxième pluralités de radiateurs dans chacune desdites première et deuxième colonnes étant équidistantes dans la direction longitudinale des colonnes.
- Antenne (100) selon la revendication 4, dans ladite première configuration, les première et deuxième colonnes étant alignées suivant un axe central P0 et les première (120, 140, 160, 180, 200, 220) et deuxième (110, 130, 150, 170, 190, 210) pluralités de radiateurs étant séparées d'une même distance Vs.
- Antenne (100) selon la revendication 5, dans ladite deuxième configuration, les première et deuxième colonnes n'étant pas alignées et les première (120, 140, 160, 180, 200, 220) et deuxième (110, 130, 150, 170, 190, 210) pluralités de radiateurs étant séparées d'une distance de décalage SD supérieure à Vs.
- Antenne (100) selon la revendication 7, la fréquence de fonctionnement de l'antenne étant comprise entre 1,7 GHz et 2,2 GHz, et ladite distance de séparation Vs étant comprise entre 75 et 125 mm.
- Antenne (100) selon la revendication 7, la distance de séparation HS1 et HS2 étant variable entre 0 et 40 mm.
- Procédé de réglage d'une largeur de faisceau de signal dans une antenne (100) dotée de premier (105a) et deuxième (105b) panneaux réflecteurs généralement plans en forme de peigne sur chacun desquels est montée une pluralité de radiateurs, le procédé comprenant les étapes consistant à :régler la position d'au moins un des panneaux (105a, 105b) en le déplaçant dans une direction généralement parallèle à son plan pour obtenir une première configuration comprenant plusieurs premiers (120, 140, 160, 180, 200, 220) et deuxièmes (110, 130, 150, 170, 190, 210) radiateurs interdigités sur lesdits premier (105a) et deuxième (105b) panneaux réflecteurs séparés d'une première distance de séparation pour produire une première largeur de faisceau de signal ;
etrégler la position d'au moins un des panneaux (105a, 105b) en le déplaçant dans une direction généralement parallèle à son plan pour obtenir une deuxième configuration comprenant des premiers (120, 140, 160, 180, 200, 220) et deuxièmes (110, 130, 150, 170, 190, 210) radiateurs interdigités séparés d'une deuxième distance de séparation différente de la première pour produire une deuxième largeur de faisceau de signal. - Procédé selon la revendication 10, dans la première configuration, les radiateurs (110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 210, 220) étant tous alignés suivant un axe central P0 du réflecteur et, dans la deuxième configuration, les radiateurs étant décalés en alternance dans des directions opposées par rapport à l'axe central du réflecteur.
- Procédé selon la revendication 11, la largeur de faisceau étant plus grande dans ladite première configuration que dans ladite deuxième configuration.
- Procédé selon la revendication 10, la largeur de faisceau de l'antenne (100) étant variable entre environ 100 degrés et 47 degrés.
- Procédé selon la revendication 10, les premier (105a) et deuxième (105b) panneaux réflecteurs formant conjointement une structure réflectrice rectangulaire présentant une largeur variable entre environ 120 mm et 200 mm.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US263507P | 2007-11-09 | 2007-11-09 | |
PCT/US2008/082697 WO2009061966A1 (fr) | 2007-11-09 | 2008-11-06 | Réflecteur à étage variable destiné à une antenne commandée par largeur de faisceau à azimut |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2218119A1 EP2218119A1 (fr) | 2010-08-18 |
EP2218119A4 EP2218119A4 (fr) | 2011-05-25 |
EP2218119B1 true EP2218119B1 (fr) | 2012-07-25 |
Family
ID=40626178
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08847232A Not-in-force EP2218119B1 (fr) | 2007-11-09 | 2008-11-06 | Reflecteur a etage variable destine a une antenne commandee par largeur de faisceau a azimut |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2218119B1 (fr) |
WO (1) | WO2009061966A1 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010039019B4 (de) | 2010-08-06 | 2014-08-07 | Technische Universität Dresden | Antikörper gegen 6-sulfo LacNAc positive humane dendritische Zellen und deren Verwendung |
CN206806508U (zh) * | 2017-04-07 | 2017-12-26 | 深圳市景程信息科技有限公司 | 可重构的双极化宽频天线 |
CN206673107U (zh) * | 2017-04-07 | 2017-11-24 | 深圳市景程信息科技有限公司 | 利用微带线馈电的三模宽带阶梯型缝隙天线 |
EP3939119A4 (fr) | 2020-03-24 | 2022-05-18 | CommScope Technologies LLC | Éléments rayonnants ayant des tiges d'alimentation inclinées et antennes de station de base les comprenant |
WO2021195040A2 (fr) | 2020-03-24 | 2021-09-30 | Commscope Technologies Llc | Antennes de station de base comprenant un module d'antenne active, dispositifs et procédés associés |
US11611143B2 (en) | 2020-03-24 | 2023-03-21 | Commscope Technologies Llc | Base station antenna with high performance active antenna system (AAS) integrated therein |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04122102A (ja) * | 1990-09-12 | 1992-04-22 | Omron Corp | 平面アンテナ |
KR100270888B1 (ko) | 1998-04-08 | 2000-12-01 | 윤종용 | 노운 굿 다이 제조장치 |
US6323823B1 (en) * | 2000-07-17 | 2001-11-27 | Metawave Communications Corporation | Base station clustered adaptive antenna array |
US7173572B2 (en) * | 2002-02-28 | 2007-02-06 | Andrew Corporation | Dual band, dual pole, 90 degree azimuth BW, variable downtilt antenna |
US7038621B2 (en) * | 2003-08-06 | 2006-05-02 | Kathrein-Werke Kg | Antenna arrangement with adjustable radiation pattern and method of operation |
US7145515B1 (en) * | 2004-01-02 | 2006-12-05 | Duk-Yong Kim | Antenna beam controlling system for cellular communication |
FR2896705B1 (fr) | 2006-01-30 | 2008-12-05 | Commissariat Energie Atomique | Procede de separation en milieu aqueux d'au moins un element actinide d'elements lanthanides par complexation et filtration membranaire |
US7864130B2 (en) * | 2006-03-03 | 2011-01-04 | Powerwave Technologies, Inc. | Broadband single vertical polarized base station antenna |
WO2008124027A1 (fr) * | 2007-04-06 | 2008-10-16 | Powerwave Technologies, Inc. | Double décalage d'une antenne à commande de largeur de faisceau en azimut réglable pour un réseau sans fil |
WO2008156633A2 (fr) | 2007-06-13 | 2008-12-24 | Powerwave Technologies, Inc. | Antenne commandée par largeur de faisceau à azimut décalable à triple étage pour un réseau sans fil |
-
2008
- 2008-11-06 WO PCT/US2008/082697 patent/WO2009061966A1/fr active Application Filing
- 2008-11-06 EP EP08847232A patent/EP2218119B1/fr not_active Not-in-force
Also Published As
Publication number | Publication date |
---|---|
EP2218119A1 (fr) | 2010-08-18 |
WO2009061966A1 (fr) | 2009-05-14 |
EP2218119A4 (fr) | 2011-05-25 |
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