EP2058901B1 - Antenne mit reflektierender Störstelle - Google Patents

Antenne mit reflektierender Störstelle Download PDF

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Publication number
EP2058901B1
EP2058901B1 EP08168505A EP08168505A EP2058901B1 EP 2058901 B1 EP2058901 B1 EP 2058901B1 EP 08168505 A EP08168505 A EP 08168505A EP 08168505 A EP08168505 A EP 08168505A EP 2058901 B1 EP2058901 B1 EP 2058901B1
Authority
EP
European Patent Office
Prior art keywords
antenna
reflective means
radiating elements
reflector
folded
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.)
Active
Application number
EP08168505A
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English (en)
French (fr)
Other versions
EP2058901A1 (de
Inventor
Jean-Pierre Harel
Patrick Lecam
Jérôme Plet
Marco Kunze
Warren F. Hunt
Selina Qu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel Lucent SAS
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Alcatel Lucent SAS
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Publication date
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Publication of EP2058901A1 publication Critical patent/EP2058901A1/de
Application granted granted Critical
Publication of EP2058901B1 publication Critical patent/EP2058901B1/de
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • H01Q19/106—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces using two or more intersecting plane surfaces, e.g. corner reflector antennas
    • 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 to a telecommunication antenna, used in particular for the base stations of the cellular communication networks (GSM, UMTS).
  • GSM Global System for Mobile communications
  • UMTS cellular communication networks
  • Such an antenna is formed of networks of radiating elements slightly spaced.
  • the invention relates in particular to the reflecting means which is provided with this antenna.
  • a telecommunications antenna transmits and receives radio waves at frequencies specific to a telecommunications system operated by this antenna.
  • an antenna for the UMTS system uses frequency waves in the band 1710 to 2170 MHz.
  • a base station has an antenna array and feeds each antenna with frequency waves included in the band operated by it.
  • the distance between the antennas is short, which has the consequence that each antenna has an influence on the adjacent antenna.
  • the document US 5710569 There is the problem of minimizing the lateral radiation of an antenna, a source of interference with neighboring antennas, modifying the width of the horizontal beam and improving the front-to-back ratio.
  • This document describes an antenna comprising aligned dipoles fixed on the flat base of a reflector with edges folded upwards. Choke reflectors are arranged in the space between the dipole and the lateral fold of the reflector, of which they are distinct, so as to form a screen on either side of the row of dipoles. These traps are composed of metal sheets folded in L and fixed on the flat base of the reflector supporting the dipoles. They can be moved in a horizontal direction so as to move closer to or away from the dipole alignment, in order to modify the characteristics of the antenna.
  • the document EP-0 973 231 The aim is to minimize the side lobes of an antenna, a source of interference with adjacent antennas, and to obtain the characteristics of a bi-polarization with a single antenna. This document also mentions the possibility of controlling the insulation by adjusting the position of the traps.
  • This document describes an antenna comprising radiating elements fixed on the flat part of a reflector having folded edges downwards. Two longitudinally movable "choke reflectors" are arranged along the elements radiating on the flat part of the reflector. Transverse traps are further placed between the radiating elements perpendicular to the lateral traps.
  • trap is given to simple angles forming two parallel flat surfaces flanking closer aligned radiating elements. These traps have the function of modifying the opening value of the antenna.
  • the authors of these documents seek a control of the nominal value of the opening of the antenna by arranging the traps in the central zone of the antenna, closer to the dipoles.
  • the present invention aims to improve the stability of the beamwidth in the horizontal plane of a radiofrequency antenna.
  • Another object of the invention is to improve the performance of this cross-polarized antenna in the main axis and at an angle of ⁇ 60 ° to the axis of the antenna.
  • the object of the present invention is an antenna comprising an array of aligned radiating elements, a first reflecting means comprising a flat central part on which the radiating elements are arranged and edges folded longitudinally on either side of the alignment. elements, and at least a second reflecting means.
  • the second reflecting means is a reflecting trap disposed outside the space separating the radiating elements from the folded edge of the first reflecting means, and it is separated from the first reflecting means by a layer of dielectric material so as to be connected by capacitive coupling to the first reflecting means.
  • the second reflecting means according to the invention is disposed outside the folded edges of the first reflecting means of the antenna, outside the immediate zone of radiation of the elements, which consequently produces the stabilization of the opening value. of the antenna and simultaneously improves the cross-polarization parameters.
  • the second reflecting means according to the invention is connected to the first reflecting means by indirect electrical coupling or capacitive coupling. This represents an improvement of the prior art: simple assembly and absence of intermodulation constraints resulting from a bad assembly between parts.
  • the second reflecting means is separated from the first reflecting means by a layer of dielectric material. Thus the parts connected to the earth are not in direct contact.
  • the reflecting trap according to the invention does not act on the nominal value of the opening of the antenna, but has the effect of improving the stability of this value.
  • the invention makes it possible to improve the cross polarization parameters of the antenna, whereas the prior art only describes vertically polarized antennas.
  • the value of the insulation is not influenced by the presence of traps because they are placed too far away from the radiating elements.
  • the second reflecting means is a U-shaped folded metal sheet, the outer face of one of the branches of the U cooperating with the outer face of a folded edge of the first means. reflective.
  • the branches of the U are of unequal lengths.
  • the metal sheet is aluminum.
  • the second reflecting means is disposed on at least a part of the total length of the antenna.
  • the trap is applied against the outer face of the folded edges of the first reflecting means, on certain portions of the length of the first reflecting means.
  • the reflective trap may also cover the entire length of the first reflective means.
  • the antenna 1 comprises elements 2, such as dipoles, radiating a radiofrequency signal, aligned along a longitudinal main axis X-X '.
  • the antenna 1 also comprises a reflecting means 3, connected to the ground, composed of a flat part 4 and side edges 5 folded upwards, parallel to the axis XX 'on each side of the row of radiating elements 2.
  • the radiating elements 2 are fixed on the flat part 4 of the reflector 3.
  • the transverse walls 6 separate the radiating elements 2, and rest on the lateral edges 5 of the reflector 3.
  • the radiating elements 2 are powered electrically by lines 7 connected to connectors 8 carried by the transverse end walls 9.
  • the antenna 1 further comprises a supply network of the radiating elements 2 (not shown).
  • the antenna 1 comprises reflective traps 10 formed of a U-shaped folded aluminum foil placed longitudinally outside the reflector 3, outside the zone of proximity of the radiating elements 2.
  • the outer face 11 of one of the branches of the U is contiguous to the outer face 12 of the lateral edge 5 of the reflector 3, as shown in FIGS. Figures 2a and 2b .
  • the U branch of the trap 10 is separated by a layer 13 of a dielectric material from the lateral edge 5 of the reflector 3 to which it is contiguous.
  • Capacitive coupling equivalent to a short-circuit for radio frequencies, which is made between the lower portion 14 of the reflecting trap 10 and the lower angle 15 of the reflector 3 leads to an open circuit at the upper edge 16 of the reflector 3. Because of this the currents 17 are trapped in the reflecting trap 10, and no longer propagate uncontrollably (arrowed line 18 ) outside and in the flat part 4 below the rear of the reflector 3, as explained on the figure 2b .
  • the line 19, of an unwound length of the order of a half-wavelength, is a quarter-wave transformer formed by the two opposite conductors, respectively the inside of the trap 10 and the outside of the reflector 3.
  • the other U-leg of the trap 10, which is not contiguous to the reflector 3 has a length 20 on the order of a quarter of the wavelength in this case.
  • the radiating elements 2 are further protected by a housing 21.
  • each row has a reflector 31, 31 ' formed of a flat base 32, 32' provided with folded side edges 33, 33 ' flanking each row of radiating elements 30.
  • Traps 34, 34' are contiguous to the outer face 35, 35 ' edges 33, 33' of each of the reflectors 31, 31 '.
  • each row of radiating elements 30 has its own reflector 31, 31 ' framed by two traps 34, 34'.
  • the two rows of radiating elements 30 are further protected by a common housing 36 .
  • an antenna 40 having two rows of radiating elements 41 fixed on the flat portion 42, 42 'of their reflectors 43, 43' comprising respective longitudinal edges 44, 44 'folded. Traps 45, 45 ' are arranged on the outer side of the folded edges 44, 44' , on only a part of the length of the antenna 40.
  • a dual polarized antenna has two + 45 ° and -45 ° identified ports that correspond to the two antenna connectors.
  • the figure 5 shows the variation of the aperture W at -3 dB of the beam of an antenna of the prior art for one of the two ports at -45 ° (curve 50).
  • the figure 6 shows the variation of the aperture W at -3 dB of the beam of an antenna comprising two traps according to one embodiment of the invention for one of the two ports at -45 ° (curve 60 ).
  • the figure 7 shows the evolution of the cross polarization P of an antenna of the prior art in the sector at +/- 60 ° of the main axis of the antenna for one of the two ports at -45 ° (curve 70 ).
  • the figure 8 shows the evolution of the crossed polarization P of an antenna comprising two traps according to one embodiment of the invention in the sector at +/- 60 ° of the main axis of the antenna for one of the two ports at -45 ° (curve 80 ).

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Support Of Aerials (AREA)
  • Glass Compositions (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Claims (5)

  1. Antenne mit einem Netz von aneinandergereihten Strahlungselementen (2), einem ersten reflektierenden, Mittel (3), welches einen mittleren ebenen Bereich (4), auf weichem die Strahlungselemente (2) angeordnet sind, und Ränder (5), welche an beiden Seiten der Anreihung von Elementen (2) in Längsrichtung umgeschlagen sind, (2) umfasst, und mindestens einem zweiten reflektierenden Mittel, dadurch gekennzeichnet, dass das zweite reflektierende Mittel eine reflektierende Störstelle (10) ist, welche am AuSeren des Raums, welcher die Strahlungselemente (2) von dem umgeschlagenen Rand (5) des ersten reflektierenden Mittels (3) trennt, angeordnet ist, und dass das zweite reflektierende Mittel durch eine Schicht aus dielektrischem Material von dem ersten Mittel getrennt Ist, um es durch kapazitive Koppelung mit dem ersten reflektierenden Mittel zu verbinden.
  2. Antenne nach Anspruch 1, wobei das zweite reflektierende Mittel (10) eine in U-Form gefaltete Metallfolie ist wobei die Außenseite (11) eines der Schenkel des U mit der Außenseite (12) eines umgeschlagenen Randes (5) des ersten reflektierenden Mittels (3) zusammenwirkt.
  3. Antenne nach Anspruch 2, wobei die Schenkel des U von ungleicher länge sind.
  4. Antenne nach Anspruch 2, wobei die Metallfolie aus Aluminium besteht.
  5. Antenne nach Anspruch 1, wobei das zweite reflektierende Mittel auf mindestens einem Teil der Gesamtlänge der Antenne angeordnet ist.
EP08168505A 2007-11-07 2008-11-06 Antenne mit reflektierender Störstelle Active EP2058901B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0758847A FR2923323B1 (fr) 2007-11-07 2007-11-07 Antenne a piege reflechissant

Publications (2)

Publication Number Publication Date
EP2058901A1 EP2058901A1 (de) 2009-05-13
EP2058901B1 true EP2058901B1 (de) 2010-07-14

Family

ID=39446115

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08168505A Active EP2058901B1 (de) 2007-11-07 2008-11-06 Antenne mit reflektierender Störstelle

Country Status (5)

Country Link
US (1) US8928548B2 (de)
EP (1) EP2058901B1 (de)
AT (1) ATE474344T1 (de)
DE (1) DE602008001767D1 (de)
FR (1) FR2923323B1 (de)

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US8836601B2 (en) * 2013-02-04 2014-09-16 Ubiquiti Networks, Inc. Dual receiver/transmitter radio devices with choke
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US9634373B2 (en) 2009-06-04 2017-04-25 Ubiquiti Networks, Inc. Antenna isolation shrouds and reflectors
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CN201576751U (zh) * 2010-01-18 2010-09-08 华为技术有限公司 一种抛物面天线
WO2012011796A1 (en) * 2010-07-19 2012-01-26 Laird Technologies, Inc. Multiple-antenna systems with enhanced isolation and directivity
US8823598B2 (en) * 2011-05-05 2014-09-02 Powerwave Technologies S.A.R.L. Reflector and a multi band antenna
CN103531919B (zh) * 2012-07-05 2016-08-10 中国电信股份有限公司 四极化天线和四极化多天线阵
US20140111396A1 (en) * 2012-10-19 2014-04-24 Futurewei Technologies, Inc. Dual Band Interleaved Phased Array Antenna
US9543635B2 (en) 2013-02-04 2017-01-10 Ubiquiti Networks, Inc. Operation of radio devices for long-range high-speed wireless communication
US20160218406A1 (en) 2013-02-04 2016-07-28 John R. Sanford Coaxial rf dual-polarized waveguide filter and method
US9397820B2 (en) 2013-02-04 2016-07-19 Ubiquiti Networks, Inc. Agile duplexing wireless radio devices
US8855730B2 (en) 2013-02-08 2014-10-07 Ubiquiti Networks, Inc. Transmission and reception of high-speed wireless communication using a stacked array antenna
EP2833474A1 (de) * 2013-07-29 2015-02-04 Bouygues Telecom Antennenanordnung mit optisch transparentem Paneel mit einem geformten Reflektor
BR112016007701B1 (pt) 2013-10-11 2023-01-31 Ubiquiti Inc Método para controlar a recepção de um rádio de banda larga sem fio
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WO2016055126A1 (en) * 2014-10-10 2016-04-14 Huawei Technologies Co.,Ltd Spacer for reducing pim in an antenna
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CN108353232B (zh) 2015-09-11 2020-09-29 优倍快公司 紧凑型播音接入点装置
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Also Published As

Publication number Publication date
US20100013729A1 (en) 2010-01-21
DE602008001767D1 (de) 2010-08-26
FR2923323B1 (fr) 2011-04-08
US8928548B2 (en) 2015-01-06
FR2923323A1 (fr) 2009-05-08
EP2058901A1 (de) 2009-05-13
ATE474344T1 (de) 2010-07-15

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