EP2404344B1 - Dispositif d'assemblage d'une antenne - Google Patents

Dispositif d'assemblage d'une antenne Download PDF

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Publication number
EP2404344B1
EP2404344B1 EP10710877.1A EP10710877A EP2404344B1 EP 2404344 B1 EP2404344 B1 EP 2404344B1 EP 10710877 A EP10710877 A EP 10710877A EP 2404344 B1 EP2404344 B1 EP 2404344B1
Authority
EP
European Patent Office
Prior art keywords
antenna
radiating element
reflector
fastening means
antenna according
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
EP10710877.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2404344A1 (fr
Inventor
Olivier Portier
Gérard JACOB
Jean-Pierre Harel
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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Filing date
Publication date
Application filed by Alcatel Lucent SAS filed Critical Alcatel Lucent SAS
Publication of EP2404344A1 publication Critical patent/EP2404344A1/fr
Application granted granted Critical
Publication of EP2404344B1 publication Critical patent/EP2404344B1/fr
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    • 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
    • H01Q1/1207—Supports; Mounting means for fastening a rigid aerial element
    • 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
    • H01Q1/20—Resilient mountings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/5313—Means to assemble electrical device

Definitions

  • the present invention relates to the field of telecommunications antennas transmitting radio waves in the microwave range by means of voluminal radiating elements (in three dimensions), and more particularly, but not exclusively to a device for assembling a radio frequency. 'antenna.
  • an antenna comprises steps of mechanical fastening of its components to each other.
  • a mechanical assembly comprising a frame, serving as a central mechanical structure, on which are fixed all the other components, such as radiating elements, power dividers, phase shifters, walls reflective, parasitic elements, etc ... Once all the elements assembled around the frame, the whole is surrounded by a radome.
  • this frame In order to withstand the mechanical forces due to the weight of the components and the constraints imposed by the environment, this frame is made from a material, usually metal, having a sufficient hardness and thickness. This initial constraint limits the subsequent mechanical choices. It requires that the compromises in the design, especially between the factors of electrical and mechanical nature and the cost of manufacture, are mainly guided by the mechanical requirements to ensure stability of performance. For example, an antenna about 2 m long operating in a frequency band around 2 GHz has an aluminum frame having a thickness between 1.5 mm and 2.5 mm. Whereas, if only the depth related to the skin effect in the frequency range is taken into account, the required thickness would be only less than 0.1 mm.
  • the panel antennas usually comprise an array of voluminal radiating elements aligned and fixed on a longitudinal mechanical structure.
  • the document DE-10-2007-033 817 discloses an antenna having a mechanical structure and at least one dual polarization volume radiating element having a foot surmounted by a radiating plane.
  • the problem is therefore to find an assembly device for performing the positioning and fixing on the structure of the radiating elements, and possibly other components involved in the construction of a panel antenna, so as to obtain a connection which is mechanically and electrically efficient and cleared of intermodulation products (IMPs).
  • IMPs intermodulation products
  • the object of the invention is therefore to propose in particular a device for assembling the components of a panel-type antenna for fixing the voluminal radiating elements on a component of the mechanical structure of the antenna in a fast, reliable manner, reversible and cheap.
  • the present invention also aims to provide an antenna comprising volumic radiating elements mechanically connected to a reflector whose thickness is less than in the prior art without compromising the mechanical strength of the antenna.
  • Another object of the present invention is to propose a method of fixing a radiating element coupled to a conductive reflector, which is faster and however as reliable as the previous methods.
  • the dielectric part comprises the means necessary for fixing the volume radiating element, such as in particular holes, clips, clips or latching pins.
  • the first fixing means cooperating with the radiating element is a snap-fastening means.
  • the first fixing means comprises at least one relief capable of being inserted into the foot of the volume radiating element.
  • Fixing the mechanical element on the dielectric piece by snapping can be achieved by means of reliefs of several types: annular, protruding, U-type, torsion, etc ...
  • the dielectric part To prevent their transmission to the radiating element, the dielectric part must be able to absorb vibrations and shocks. For this reason, the dielectric piece may further comprise at least one damper.
  • the invention has the advantage that the reflector, serving as a mechanical structure, placed in the center of the antenna along its longitudinal axis no longer directly supports the external mechanical stresses, the radiating element now being connected thereto via the dielectric part.
  • the reflector relieved of these constraints, retains only its function of conductive electric reflector.
  • All the components involved in the construction of a panel antenna in particular the reflector, the radiating elements, the radome, the screens, the parasitic elements, etc., can be connected to the dielectric part which ensures the mechanical rigidity of the assembly:
  • the dielectric part must be sufficiently rigid to withstand the mechanical stresses imposed on it and must simultaneously ensure the flexibility of the connection mechanical between the radiating element and the reflector.
  • This part will advantageously be made of a polymeric material, such as polyoxymethylene (POM), polypropylene (PP) or an acrylonitrile / butadiene / styrene (ABS) copolymer, possibly filled with fiberglass.
  • POM polyoxymethylene
  • PP polypropylene
  • ABS acrylonitrile / butadiene / styrene copolymer
  • the assembly device according to the invention makes it easier to control the vibrations or external shocks.
  • the use of plastics makes it possible to at least partially absorb the forces exerted by the external mechanical environment and to limit their propagation in the components inside the antenna.
  • the invention also proposes a panel-type antenna comprising at least one voluminal radiating element comprising a foot surmounted by a radiating plane, at least one component of the mechanical structure of the antenna, and an assembly device as described above.
  • the dielectric piece is disposed transversely to the longitudinal axis of the antenna.
  • the electrical connection between the volume radiating element and the plane conducting support, serving in particular as a reflector, placed opposite the radiating plane is of the capacitive type.
  • the component of the mechanical structure of the antenna is the radome.
  • the component of the mechanical structure of the antenna is the reflector.
  • the invention makes it possible to greatly reduce these stresses on the reflector of the antenna to the extent that it is no longer in direct contact with the external environment.
  • the invention also proposes a method of assembling the components of a panel-type antenna comprising at least one voluminal radiating element comprising a foot surmounted by a radiating plane to be fixed on at least one component of the mechanical structure of the antenna. , and an assembly device as described above, in which the dielectric part is arranged transversely with respect to the longitudinal axis of the antenna.
  • an assembly device comprising a dielectric part 1 for fixing a voluminal (three-dimensional) radiating element 2 capacitively coupled to a plane conductive support, as for example the reflector 3 of an antenna.
  • a radome 4 surrounds and protects the constituent elements of the antenna.
  • the radiating element 2 comprises a radiating plane 5, formed of dipoles, carried by a usually tubular foot 6.
  • the radiating element 2 is supplied by means of accessories 7 such as a current divider, a phase-shifter, etc.
  • the dielectric part 1 comprises in its central zone 8 a means for fixing the element radiating 2 and in its lateral zones 9 fastening means cooperating with longitudinal flanges 10 belonging to a component of the mechanical structure of the antenna, such as for example the reflector 3 or the radome 4.
  • the figure 2 shows an alternative embodiment of an assembly device which comprises a dielectric part 21 comprising dampers 22 to reduce the propagation to the radiating element 2 shocks and vibrations from the external environment of the antenna.
  • Capacitive coupling can be realized in different ways as illustrated in the Figures 3 and 4 .
  • the capacitive coupling 30 of the radiating element 2 with the reflector 3 is obtained thanks to the combination of an air space 31 forming an insulating layer between the foot 6 of the radiating element 2 and the folded edge 32 of the reflector 3 and secondly a dielectric part 33 belonging to the assembly device of the radiating element 2.
  • a solid film of dielectric material may be placed in the space 31.
  • the figure 4 shows another example of capacitive coupling 40 of the radiating element 2 with a plane reflector 41. In this case it is necessary to insert a film 42 of insulating material between the foot 6 of the radiating element 2 and the plane reflector 41 .
  • the figure 5 represents a perspective view of an antenna 50 comprising an assembly device according to a preferred embodiment of the invention.
  • the radiating element 51 is composed of a foot 55 carrying a radiating plane 56 comprising two orthogonally associated half-wavelength dipoles 57, 58 to obtain a double cross polarization arrangement.
  • Each dipole 57, 58 is provided respectively with a power supply.
  • the foot 55 consists of four tube portions, two tubular portions 59 are used for the passage of the supply of the dipoles and two tubular portions 60 are free.
  • the dielectric part 53 of the assembly device placed under the reflector 52 comprises at each end a damper 61.
  • the lateral zones 62 of the dielectric part 53 carries fastening means 63 which hook on each side of the reflector 52 on longitudinal flanges 64, belonging to a component 65 of the mechanical structure of the antenna, here the lower part of the radome 54.
  • the foot 55 of the radiating element 51 is retained by the fixing means situated in the central zone 66 of the dielectric part 53.
  • Intermediate zones 67 join the central zone 66 to the lateral zones 62.
  • the dielectric part 70 comprises a central zone 71 comprising a fixing means including at least one relief 72 adapted to be inserted in one of the free tubular portions of the foot of the radiating element to retain it by snapping.
  • the central zone 71 also comprises at least one hole 73 for the passage of the power supply of the dipoles.
  • the dielectric part 70 also has lateral zones 74 advantageously provided with dampers 75 to limit the transmission to the radiator of vibrations or shocks that may come from the external environment.
  • Each lateral zone is provided with a fixing means 76 on a component of the mechanical structure of the antenna.
  • this fastening means 76 has substantially a hook shape intended to catch on longitudinal edges.
  • the dielectric part 70 finally comprises intermediate zones 77 which connect the central zone 71 to the lateral zones 74 respectively.
  • Intermediate zone 77 must provide a flexible connection to give the dielectric part good absorption capacity for vibrations, shocks or deformation that may occur.
  • the dielectric part 70 it is possible to use the dielectric part 70 to assemble several components of the antenna, such as the reflector, the radiating elements, the radome, the screens, the parasitic elements, etc ...
  • the piece dielectric 70 must be sufficiently rigid to withstand the mechanical stresses induced by the antenna components attached thereto, but yet sufficiently flexible to limit the transmission of vibrations and shocks. This absorption capacity makes it possible to increase the life of the components placed inside the antenna that are less stressed.
  • performance with respect to intermodulation products (IMPs) is improved by reducing the transmission of external stresses towards the inside of the antenna.
  • the dielectric piece 70 is molded in one piece in a plastic material.
  • the cup of the figure 9 shows in detail the fixing of a radiating element inside the antenna by means of the assembly device according to a particular embodiment of the invention.
  • the main function of the foot 90 is to separate the radiating plane 93 from the radiating element 91 of the reflector 94, and to allow the connection to the earth of the radiating element 91.
  • Two of these tube portions are used for the passage of coaxial cables supplying the dipoles.
  • the other two tube portions 92 are available for fixing the radiating element 91.
  • relief pins 95 carried by the dielectric piece 96 are force-fitted inside the tube portions 92. These pins 95 are preferably annealed so as to increase the friction to ensure the retention of the radiating element 91.
  • the reflector 94 is disposed above the dielectric part 96 and has openings to allow passage of the tube portions used for the passage of the cables.
  • the dielectric piece 96 simultaneously supports the radiating element 91, the reflector 94, the accessories 97 associated with the supply of the radiating element, and the radome 98.
  • Each lateral zone is provided with a fixing means on a component of the mechanical structure of the antenna, which in this case is the lower part of the radome 98. Thanks to this assembly device, the fixing of the radiating element 91 and the other antenna components 94, 97, 98 is very easy, simple and effective. No tools or external parts are needed to assemble the components together.
  • a thin insulating film 99 such as a thin plastic part or a plastic film for example, can be placed if necessary between the radiating element 91 and the reflector 94.
  • a thin insulating film disposed between the radiating element 91 and the reflector 94 is sufficient to create the conditions of a capacitive coupling, that is to say that the field electromagnetic between the radiating element 91 and the reflector 94 is high enough to couple the electromagnetic power from one to the other.
  • This ability to create a capacitive coupling is achieved with very cheap materials (thin plastic film). It also increases the PIM capacity of the antenna.
  • the connection between the radiating element 91 and the reflector 94 is sensitive to the products intermodulation (PIM), which is one of the possible causes of PIM training. Isolating the radiating element 91 of the reflector 94 is one way to overcome this problem.
  • PIM products intermodulation
  • the thickness of the reflector 94 has been considerably reduced. compared to the prior art, since this part no longer has to support the mass of the antenna components (radiating elements 91, power supply and its accessories 97, screens or traps, parasitic elements, radome 98, etc ... ) and the associated mechanical forces. In the embodiment shown here, the reduction of the thickness of the reflector 94 can easily reach a factor of 5. As a result, the cost of the reflector 94 will be greatly reduced.
  • reducing the thickness of the reflector 94 will now allow to obtain shapes that otherwise would have been mechanically difficult and / or expensive to obtain.
  • a round shape of the radiating part of the reflector 94 that is to say the part of the reflector situated opposite the radiating element 91 acting as a trap, can be directly integrated in the design of the reflector 94 without special constraints.
  • the round shape of the reflector 94 and the absence of sharp angles near areas of strong current makes it possible to stabilize the performance of the antenna inside the frequency band, limiting the reflections and thus reducing the ratio between the level of the electromagnetic wave radiated towards the rear of the antenna and the level of that radiated towards the front of the antenna.
  • the supply network of the radiating elements 91 is maintained by hooks 100 placed on the back of the assembly device. All the components 91, 94, 97, 98 assembled by the assembly device 96 are finally inserted into the radome 98.
  • the device according to the invention has many advantages. Thickness Reduction: Broadens the choice of material for the reflector among low-cost materials such as metallized plastics or very thin metals. This leads to a significant cost reduction. Direct metal-to-metal contacts are avoided to a minimum.
  • the assembly can be dismantled without damage.
  • the dielectric part allows the components (radiating elements, reflector, etc.) connected to it to withstand vibrations and shocks more important mechanical
  • the assembly device eliminates intermodulation products (PIM).

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  • Aerials With Secondary Devices (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)
EP10710877.1A 2009-03-06 2010-02-19 Dispositif d'assemblage d'une antenne Active EP2404344B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0951417A FR2942914A1 (fr) 2009-03-06 2009-03-06 Dispositif d'assemblage d'une antenne
PCT/FR2010/050287 WO2010100361A1 (fr) 2009-03-06 2010-02-19 Dispositif d'assemblage d'une antenne

Publications (2)

Publication Number Publication Date
EP2404344A1 EP2404344A1 (fr) 2012-01-11
EP2404344B1 true EP2404344B1 (fr) 2013-05-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP10710877.1A Active EP2404344B1 (fr) 2009-03-06 2010-02-19 Dispositif d'assemblage d'une antenne

Country Status (7)

Country Link
US (1) US9184488B2 (pt)
EP (1) EP2404344B1 (pt)
JP (1) JP5384674B2 (pt)
CN (1) CN102341953B (pt)
BR (1) BRPI1013664B1 (pt)
FR (1) FR2942914A1 (pt)
WO (1) WO2010100361A1 (pt)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102832439B (zh) * 2012-09-07 2014-10-01 苏州市大富通信技术有限公司 天线
CN103682561B (zh) * 2013-12-31 2018-08-07 安弗施无线射频系统（上海）有限公司 天线系统中电偶极子的固定装置
CN106711574B (zh) * 2015-11-13 2023-09-22 安弗施技术公司 一种天线的安装部件、支架、安装总成和安装方法
CN107768792A (zh) * 2016-08-17 2018-03-06 安弗施无线射频系统（上海）有限公司 一种天线接口结构
FR3064819B1 (fr) * 2017-03-30 2020-06-19 Frec 'n' Sys Connexion d'antenne, notamment pour transducteurs a ondes elastiques guidees en surface
WO2021213653A1 (en) * 2020-04-22 2021-10-28 Telefonaktiebolaget Lm Ericsson (Publ) An antenna arrangement for mobile radio systems, a stacked antenna system and a mobile radio antenna comprising the antenna arrangement and the stacked antenna system

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
GB2312791A (en) * 1996-05-02 1997-11-05 Northern Telecom Ltd Antenna array assembly
JP3065949B2 (ja) * 1996-09-13 2000-07-17 日本アンテナ株式会社 多周波用アンテナ
US6069590A (en) * 1998-02-20 2000-05-30 Ems Technologies, Inc. System and method for increasing the isolation characteristic of an antenna
JP2000307329A (ja) 1999-04-19 2000-11-02 Advantest Corp ダイポールアンテナ及びその製造方法
US6275181B1 (en) 1999-04-19 2001-08-14 Advantest Corporation Radio hologram observation apparatus and method therefor
US20030107881A1 (en) * 2001-12-11 2003-06-12 Ngk Insulators, Ltd. Setting construction of shield case or planar antenna on circuit board
JP4103640B2 (ja) 2003-03-18 2008-06-18 ミツミ電機株式会社 アンテナ装置
DE10316564B4 (de) 2003-04-10 2006-03-09 Kathrein-Werke Kg Antenne mit zumindest einem Dipol oder einer dipolähnlichen Strahleranordnung
CN2808764Y (zh) * 2005-03-14 2006-08-23 袁建国 一种自动开盖的塑料储物箱
SE0501502L (sv) * 2005-06-28 2006-10-17 Amc Centurion Ab Matningsklämma
DE102007033817B3 (de) 2007-07-19 2008-12-18 Kathrein-Werke Kg Antenneneinrichtung
CN201146646Y (zh) * 2007-11-30 2008-11-05 卡特彼勒科技新加坡有限公司 车辆远程通讯单元的密封外壳

Also Published As

Publication number Publication date
EP2404344A1 (fr) 2012-01-11
JP2012519990A (ja) 2012-08-30
JP5384674B2 (ja) 2014-01-08
US9184488B2 (en) 2015-11-10
FR2942914A1 (fr) 2010-09-10
CN102341953A (zh) 2012-02-01
BRPI1013664A2 (pt) 2020-08-25
BRPI1013664B1 (pt) 2021-02-23
WO2010100361A1 (fr) 2010-09-10
US20120127054A1 (en) 2012-05-24
CN102341953B (zh) 2015-06-24

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