EP1798813B1 - Verfahren zur Montage einer Antenne, Antenne montiert nach diesem Verfahren und Einrichtung zur Durchführung des Verfahrens - Google Patents

Verfahren zur Montage einer Antenne, Antenne montiert nach diesem Verfahren und Einrichtung zur Durchführung des Verfahrens Download PDF

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Publication number
EP1798813B1
EP1798813B1 EP06126245A EP06126245A EP1798813B1 EP 1798813 B1 EP1798813 B1 EP 1798813B1 EP 06126245 A EP06126245 A EP 06126245A EP 06126245 A EP06126245 A EP 06126245A EP 1798813 B1 EP1798813 B1 EP 1798813B1
Authority
EP
European Patent Office
Prior art keywords
waveguide
electromagnetic field
plane
reflector
guide
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
Application number
EP06126245A
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English (en)
French (fr)
Other versions
EP1798813A1 (de
Inventor
Daniel Morin
Armel Le Bayon
Denis Tuau
Michel Devicque
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
Application filed by Alcatel Lucent SAS filed Critical Alcatel Lucent SAS
Publication of EP1798813A1 publication Critical patent/EP1798813A1/de
Application granted granted Critical
Publication of EP1798813B1 publication Critical patent/EP1798813B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H01Q19/18—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 having two or more spaced reflecting surfaces
    • H01Q19/19—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 having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/165—Auxiliary devices for rotating the plane of polarisation
    • 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
    • H01Q19/02—Details
    • H01Q19/021—Means for reducing undesirable effects
    • H01Q19/028—Means for reducing undesirable effects for reducing the cross polarisation

Definitions

  • the present invention relates to a method of assembling a radiocommunication antenna, a radiocommunication antenna assembled according to such a method and a device for implementing such an assembly method.
  • An antenna 10 ( figure 1 ) radiocommunication may comprise a main reflector 12 whose shape, for example that of a paraboloid of revolution, allows to focus the electromagnetic waves, received or transmitted, at a subreflector 14.
  • This subreflector 14 is connected to the device 11 for feeding the antenna 10 via a waveguide 16 of generally circular section.
  • Such a waveguide 16 of circular section may have imperfections which cause a modification of the plane of propagation of a polarized electromagnetic field transmitted by this waveguide, as explained below with the aid of FIG. figure 2a .
  • the figure 2a is a front view of the waveguide 16 previously described, this representation highlighting the elliptical shape of certain sections of this waveguide 16.
  • each antenna is defined by an 'ideal transmission plane' according to which the transmitted signals propagate theoretically, the use of this ideal plane making it possible to assign different propagation planes to different neighboring antennas in order to limit the disturbances between antennas.
  • the offset introduced by a waveguide into the plane of propagation of a polarized electromagnetic field may limit the number of antennas that can be placed in the same neighborhood.
  • the present invention results from the observation that a waveguide of circular cross section has a practical, and despite its imperfections, rotational symmetry along its longitudinal axis and that, therefore, it is possible to fix this guide of waves to a reflector according to any position obtained by pivoting the cylindrical waveguide relative to its longitudinal axis.
  • the electromagnetic field 18 offset can be considered as the sum of an electromagnetic field 18a propagating in a plane coplanar with the incoming electromagnetic field, and an electromagnetic field 18b propagating in a plane transverse or perpendicular to the incoming electromagnetic field .
  • Such a method optimizes the use of a waveguide of circular section by allowing the arrangement of this waveguide to a reflector according to a position which minimizes the offset caused by this waveguide between the plane of propagation of the polarized electromagnetic field introduced into this guide and the plane of propagation of the polarized electromagnetic field from this guide.
  • This method is simple and quick to implement with a low cost device.
  • the method further comprises the step of measuring a component of the electromagnetic field leaving the waveguide in a plane transverse to the plane of propagation of the polarized electromagnetic field entering the waveguide.
  • the method further comprises the step of measuring the offset caused by the waveguide by means of a transition guide between the circular section of the waveguide and a rectangular section.
  • a transition guide between the circular section of the waveguide and a rectangular section.
  • the method further comprises the step of measuring the offset caused by the waveguide by comparing the radiated output power of the waveguide in a plane with power input to the waveguide.
  • the invention also relates to a radiocommunication antenna comprising a reflector connected to a subreflector via a waveguide having a circular section and extending along a longitudinal axis, characterized in that it comprises a reference on the waveguide to determine a relative position of this waveguide vis-à-vis the reflector, wherein the offset of the propagation plane of a polarized electromagnetic field transmitted by this guide is limited.
  • Such an antenna may make it possible to limit the offset of the propagation plane of an electromagnetic field when the latter is transmitted by the guide and that reference has been determined according to a method according to one of the preceding embodiments.
  • the subreflector also comprises a marker for determining a position of assembly of the waveguide vis-à-vis the reflector, thus facilitating assembly of the waveguide vis-à-vis the reflector.
  • Such a device allows to implement a method according to one of the previous embodiments.
  • the device comprises means measuring a component of the electromagnetic field leaving the waveguide in a plane transverse to the plane of propagation of the polarized electromagnetic field entering the waveguide.
  • the device comprises, at the output of the waveguide, a transition guide between the circular section of the waveguide and a rectangular section.
  • the device comprises means for rotating the transition guide by 90 °.
  • the device comprises means for comparing the radiated power output of the waveguide, in a plane, with a power input waveguide input.
  • FIG. 3 there is shown a device 30 for determining a position of a waveguide 32 which minimizes the offset of the propagation plane of a polarized electromagnetic field supplied to this waveguide 32, this position of the waveguide being determined vis-a-vis with respect to this input propagation plan.
  • this device 30 comprises, in this embodiment, two guides 33 and 34 effecting the transition between a rectangular section and a circular section, these transition guides 33 and 34 being located at each end of the circular waveguide 32.
  • the transition guide 33 is used to supply the electromagnetic field E entering the waveguide 32 according to a determined propagation plane.
  • the transition guide 34 is used to obtain only a component of the electromagnetic field E coming from the waveguide 32 according to a detection plane fixed by the orientation of this transition guide 34.
  • the device 30 also comprises means 35, such as U-shaped supports, for pivoting or rotating the waveguide 32 with respect to the axis 36 of rotation symmetry of the waveguide. 32, also referred to later as 36 longitudinal axis.
  • the device 30 comprises means 38, such as a metal stylus, for marking a mark on the waveguide 32, this mark identifying the optimal position of the guide 32 vis-à-vis the guide of transition 33 or, corollary, vis-à-vis the plane of propagation of the polarized electromagnetic field introduced by this transition guide 33.
  • means 38 such as a metal stylus, for marking a mark on the waveguide 32, this mark identifying the optimal position of the guide 32 vis-à-vis the guide of transition 33 or, corollary, vis-à-vis the plane of propagation of the polarized electromagnetic field introduced by this transition guide 33.
  • this optimal position is determined by measuring the component of the electromagnetic field coming from the guide 32 which is propagated in a transverse plane, or perpendicular to the plane of propagation of the electromagnetic field introduced into this guide 32.
  • this transverse component is measured for different positions of this waveguide relative to the transition guide 32, these positions being obtained by rotating the latter around its longitudinal axis 36 as described below using the Figures 4a, 4b, 4c and 4d .
  • the waveguide 32 its longitudinal axis 36 and the transition guides 33 and 34 situated respectively at the input and at the output of the waveguide 32.
  • the device 30 measures the component of the electromagnetic field E from the coplanar guide 32 with the electromagnetic field E supplied to this waveguide 32.
  • transition guides 33 and 34 are symmetrically arranged at the waveguide 32 and a probe 39 provides a signal representative of the power of the radiation coming from the guide, this power being comparable via a comparator 40 with the power measured in FIG. guide entry 32.
  • the result of the comparison is displayed on a screen 42 representing, in dB, the result of this comparison along the ordinate axis 44.
  • the comparator 40 provides a signal representative of the power associated with this transverse component of the electromagnetic field E emerging from the waveguide.
  • this waveguide is marked by a reference 46 for locating the relative position that the guide 32 must have on a reflector vis-à-vis the propagation plane of the field electromagnetic input.
  • the reference or mark 46 represents the optimal position of the guide 32 relative to the plane of propagation of the electromagnetic field E supplied to the guide so that this propagating plane of the incoming electromagnetic field can also be identified on the reflector by a second reference or mark to allow assembly of the waveguide on the reflector using these two marks.

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  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Support Of Aerials (AREA)
  • Telephone Function (AREA)

Claims (12)

  1. Verfahren zur Montage einer Funkantenne, bestehend aus einem Reflektor der über einen Wellenleiter (32) mit rundem Abschnitt, der sich in einer Längsashse (36) erstreckt, mit einem Nebenreflektor verbunden ist, dadurch gekennzeichnet, dass es die folgenden Schritte umfasst:
    - den Schritt zum Schwenken des Wellenleiters (32) um seine Längsachse (36), um eine Position zu ermitteln, in der die Verschiebung der Ausbreitungsebene eines polarisierten elektromagnetischen Felds, das von diesem Wellenleiter übertragen wird, begrenzt ist,
    - den Schritt zur Markierung (46) dieser Position auf dem Wellenleiter (32), und
    - den Schritt zur Montage des Wellenleiters auf dem Reflektor in Abhängigkeit von dieser Markierung.
  2. Verfahren gemäß Anspruch 1, das außerdem den Schritt zur Messung einer Komponente des elektromagnetischen Felde umfasst, das in einer quer zur Ausbreitungsebene des polarisierten elektromagnetischen Felds, das in den Wellenleiter (32) eintritt, verlaufenden Ebene aus dem Wellenleiter (32) austritt.
  3. Verfahren gemäß Anspruch 2, das außerdem den Schritt zur Messung der Verschiebung umfasst, die von dem Wellenleiter mittels einer Übergangsführung (34) zwischen dem runden Abschnitt des Wellenleiters und einem rechteckigen Abschnitt verursacht wird.
  4. Verfahren gemäß Anspruch 3, dadurch gekennzeichnet, dass es außerdem den Schritt zum Schwenken der Übergangsführung (34) um 90° umfasst, um die quer zu dem aus dem Wellenleiter austretenden elektromagnetischen Feld Verlaufende Komponente Zu messen.
  5. Verfahren gemäß einem der Ansprüche 2, 3 oder 4, das außerdem den Schritt zur Messung der Verschiebung umfasst, die von dem Wellenleiter (32) verursacht wird, indem die am Ausgang des Wellenleiters (32) in einer quer verlaufenden Ebene abgestrahlte Leistung mit der Leistung, die am Eingang des Wellenleiters eingeführt wird, verglichen wird.
  6. Funkantenne, die einen Reflektor umfasst, der über einen wellenleiter (32) mit einem runden Abschnitt, der sich in einer Längsachse (36) erstreckt, mit einem Nebenreflektor verbunden ist, dadurch gekennzeichnet, dass sie eine Markierung (46) auf dem Wellenleiter (32) umfasst, um eine relative Postition des Wellenleiters (32) in Bezug auf den Reflektor zu ermitteln, in der die Verschiebung der Ausbreitungsebene eines von diesem Wellenleiter übertragenen polarisierten elektromagnetischen Felds begrenzt ist.
  7. Antenne gemäß Anspruch 6, in der der Reflektor eine Markierung umfasst, um eine Montageposition des Wellenleiters (32) in Bezug auf den Reflektor zu ermitteln.
  8. Einrichtung (30) zur Montage einer Funkantenne, die einen Reflektor umfasst, der über einen Wellenleiter- (32) mit rundem Abschnitt, der sich in einer Längsachse (36) erstreckt, mit einem Nebenreflektor verbunden ist, dadurch gekennzeichnet, dass sie Folgendes umfasst:
    - Vorrichtungen (35) zum Schwenken des Wellenleiters (32) um seine Längsachse (36) und Vorrichtungen (34, 39, 40, 42, 44) zur Ermittlung einer Position, in der die Ausbreitungsebene eines von diesem Wellenleiter übertragenen polarisierten elektromagnetischen Felds nur eingeschränkt verschoben wird, und
    - Vorrichtungen (38) zur Markierung (46) dieser Position auf dem Wellenleiter (32).
  9. Einrichtung (30) gemäß Anspruch 9, in der Vorrichtungen (34, 39, 40, 42, 44) angeordnet sind, um eine Komponente des elektromagnetischen Felds zu messen, das aus dem Wellenleiter austritt, die quer zur Ausbreitungsebene des polarisierten elektromagnetischen Felds verläuft, das in den Wellenleiter eintritt.
  10. Einrichtung (30) gemäß Anspruch 8 oder 9, in der am Ausgang des Wellenleiters (32) eine Übergangsführung (34) zwischen dem runden Abschnitt des Wellenleiters und einem rechteckigen Abschnitt angeordnet ist.
  11. Einrichtung (30) gemäß Anspruch 10, in der Vorrichtungen (35) angeordnet sind, die die Möglichkeit bieten, die Übergangsführung um 90° zu schwenken.
  12. Einrichtung (30) gemäß einem der Ansprüche 8 bis 10, in der Vorrichtungen (39, 40, 42, 44) angeordnet sind, die die Möglichkeit bieten, die am Ausgang des Wellenleiters in einer Ebene abgestrahlte Leistung mit einer Leistung zu vergleichen, die am Eingang des Wellenleiters eingegeben wird.
EP06126245A 2005-12-19 2006-12-15 Verfahren zur Montage einer Antenne, Antenne montiert nach diesem Verfahren und Einrichtung zur Durchführung des Verfahrens Not-in-force EP1798813B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0553937A FR2895154B1 (fr) 2005-12-19 2005-12-19 Procede d'assemblage d'une antenne de radiocommunication, antenne de radiocommunication assemblee selon un tel procede et dispositif destine a la mise en oeuvre d'un tel procede d'assemblage

Publications (2)

Publication Number Publication Date
EP1798813A1 EP1798813A1 (de) 2007-06-20
EP1798813B1 true EP1798813B1 (de) 2008-04-02

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EP06126245A Not-in-force EP1798813B1 (de) 2005-12-19 2006-12-15 Verfahren zur Montage einer Antenne, Antenne montiert nach diesem Verfahren und Einrichtung zur Durchführung des Verfahrens

Country Status (7)

Country Link
US (1) US7586454B2 (de)
EP (1) EP1798813B1 (de)
CN (1) CN101005158B (de)
AT (1) ATE391351T1 (de)
BR (1) BRPI0605325A (de)
DE (1) DE602006000863T2 (de)
FR (1) FR2895154B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9019164B2 (en) * 2011-09-12 2015-04-28 Andrew Llc Low sidelobe reflector antenna with shield
US11075466B2 (en) 2017-08-22 2021-07-27 Commscope Technologies Llc Parabolic reflector antennas that support low side lobe radiation patterns
US11594822B2 (en) 2020-02-19 2023-02-28 Commscope Technologies Llc Parabolic reflector antennas with improved cylindrically-shaped shields

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3827051A (en) * 1973-02-05 1974-07-30 Rca Corp Adjustable polarization antenna system
US4599744A (en) * 1983-11-10 1986-07-08 Micro Communications, Inc. UHF broadcast antenna on a tower with circular waveguide carrying RF energy up the tower to the antenna with polarization adjustments and exclusions
JPH0642610B2 (ja) * 1988-02-19 1994-06-01 工業技術院長 一次放射器の構造
US5229736A (en) * 1992-01-07 1993-07-20 Adams Douglas W Waveguide polarization coupling
US6137449A (en) * 1996-09-26 2000-10-24 Kildal; Per-Simon Reflector antenna with a self-supported feed
EP0859427B1 (de) * 1997-02-14 2006-06-21 Andrew A.G. Doppelreflektormikrowellenantenne
DE69836636D1 (de) * 1997-08-21 2007-01-25 Kildal Antenn Consulting Ab Verbesserte reflektorantenne mit selbsttragendem speiseelement
US6724349B1 (en) * 2002-11-12 2004-04-20 L-3 Communications Corporation Splashplate antenna system with improved waveguide and splashplate (sub-reflector) designs

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Publication number Publication date
BRPI0605325A (pt) 2007-10-09
DE602006000863D1 (de) 2008-05-15
FR2895154B1 (fr) 2008-01-25
US20070152899A1 (en) 2007-07-05
FR2895154A1 (fr) 2007-06-22
DE602006000863T2 (de) 2009-04-02
US7586454B2 (en) 2009-09-08
ATE391351T1 (de) 2008-04-15
CN101005158A (zh) 2007-07-25
EP1798813A1 (de) 2007-06-20
CN101005158B (zh) 2010-10-13

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