EP2226896B1 - Multiband-Rundstrahler - Google Patents

Multiband-Rundstrahler Download PDF

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Publication number
EP2226896B1
EP2226896B1 EP20090447003 EP09447003A EP2226896B1 EP 2226896 B1 EP2226896 B1 EP 2226896B1 EP 20090447003 EP20090447003 EP 20090447003 EP 09447003 A EP09447003 A EP 09447003A EP 2226896 B1 EP2226896 B1 EP 2226896B1
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EP
European Patent Office
Prior art keywords
antenna
elements
radiant
interconnected
group
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
EP20090447003
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English (en)
French (fr)
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EP2226896A1 (de
Inventor
Philippe Herman
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Individual
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Individual
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
    • H01Q9/265—Open ring dipoles; Circular dipoles
    • 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

Definitions

  • the present invention relates, in general, to an omnidirectional multiband antenna for transmitting and / or receiving audio and / or video signals.
  • the invention relates to an omnidirectional multiband antenna for transmitting and / or receiving audio and / or video signals, of the kind comprising identical antenna elements interconnected in a set, each antenna element comprising a radiating element in vertical rectilinear polarization, formed by two quadrilaterals united by a common vertex and provided with a radio power supply center and a reflector associated with this radiating element so that each feeding center is on a common circle and that the feed centers of two adjacent radiating elements are separated by a working wavelength ⁇ .
  • Wi-Fi Wireless Fidelity
  • Wi-Fi Wireless Fidelity
  • Wi-Fi uses a narrow frequency band of the order of 2.4 GHz shared with other roommates and allows to connect laptops, office machines, communicating objects or others on a radius of several tens meters in indoor or several hundred meters in an open environment.
  • Wimax Worlwide Interoperability for Microwave Access
  • Internet Internet
  • telephone or to interconnect, confidential, corporate networks over a coverage area of several kilometers radius (12 to 15 km in optimal conditions) while allowing coverage of white areas or areas not covered by ADSL.
  • the reception of the radio signal which passes over the frequency band of 3.5 GHz but which could operate on frequencies between 2 and 11 GHz, requires the use of an antenna directed towards a base station. This antenna can receive but also emit Wimax.
  • an omnidirectional antenna for transmitting and / or receiving audio and / or video signals which comprises 4 identical antenna elements spaced substantially uniformly in the same plane, in vertical rectilinear polarization and supplied electrically by currents substantially similarly phase and of the same amplitude and of which each main lobe of radiation is separated from the adjacent lobe by at most one working wavelength ⁇ in the direction of propagation of the wave.
  • Each antenna element comprises a radiating element of "biquad" type, that is to say consisting of a continuous loop taking the geometrical form of two squares situated in the same plane, having a common vertex and of perimeter substantially equal to 2 ⁇ , as well as an associated reflector.
  • the object of the present invention is to propose an omnidirectional antenna of the kind indicated above which, while being simple in its implementation and of a non prohibitive cost, can be used both in the Wi-Fi band and in the Wimax band so as to overcome the disadvantage of the state of the art.
  • each set of interconnected antenna elements comprises a radiating element whose feed center is aligned on the same line with the center of supply of a radiating element included in each of the other sets of interconnected antenna elements thus forming groups of radiating elements, two adjacent supply centers of a group of radiating elements being distant from each other; one of the other by a distance substantially equal to 2 ⁇ / 3, so that this antenna resonates according to a bandwidth and according to harmonics thereof.
  • the antenna according to the invention comprises two sets of interconnected antenna elements as described above.
  • each set comprises an identical number of antenna elements usually from 2 to 8, in particular from 2 to 4 and, preferably, 4 interconnected antenna elements.
  • each radiating element forming part of an antenna element of an assembly is located on a common circle and equidistant from the two feeding centers which are adjacent thereto. Therefore, when the assembly in question comprises four interconnected antenna elements, therefore four radiating elements, the centers supply of these radiating elements are arranged on a common circle at the intersection of two orthogonal diameters.
  • each of the groups are coplanar and separated so that each side of the quadrilaterals of a radiating element is parallel to the corresponding side of the other radiating element (s) of the group, the respective feeding centers being aligned along a straight line no quadrilateral.
  • the power centers of the same group of radiating elements are distant from each other sufficiently and appropriately to avoid a maximum of interference.
  • two adjacent feed centers of a group of radiating elements are spaced from each other by a distance substantially equal to 2 ⁇ / 3.
  • each set comprises antenna elements which each comprise a radiating element or radiator consisting of a double continuous loop taking the geometric form of two squares with a common vertex, situated in the same plane and whose perimeter is substantially equal to two wavelengths (2 ⁇ ).
  • Such a radiating element may be designated later in the description as in the claims by the name "biquad”.
  • This radiating element is usually made from a wire, advantageously copper, disposed at a small distance from the reflector to which it is attached.
  • this wire is replaced by a printed circuit on a dielectric or insulating support panel, the printing being performed according to known methods.
  • This support panel is usually made of a laminated panel formed of a fiberglass reinforced epoxy composite. Such a panel is generally thin, preferably less than 2 mm. Usually, a single support panel is used to print the radiating elements of a group.
  • the different radiating elements of the same assembly are connected via their respective power centers to a coupler via a coaxial power supply cable.
  • the interconnection of the radiating elements belonging to a set may comprise from 2 to 8, in particular from 2 to 4 and preferably 4 radiating elements as described above.
  • the radiating elements of the same group are associated with a single reflector forming a support panel for this group of radiating elements.
  • This reflector is formed of a metal plate generally made of copper or aluminum. Steel, especially stainless steel or polychlorinated biphenyl (“PCB”) can be used as well. In this case, and in known manner, it may be advantageous to solder an electrically conductive metal, for example copper, to the orifice of the coaxial channel orifice provided in this reflector, so as to ensure a good physical and electrical connection.
  • PCB polychlorinated biphenyl
  • the sets of interconnected antenna elements thus formed will be connected through the couplers of the radiating elements of each set.
  • This interconnection, as well as the interconnection of the radiating elements of a set of antenna elements and the tracing pattern of the different biquads, may be performed after studying the desired characteristics of radiation. This study can be carried out on the basis of a computer file previously designed by a computer simulation technology using commercially available software, for example the CST Studio Suite 2009 software.
  • the antenna according to the invention comprises a coupling of two sets of antenna elements each comprising four interconnected radiating elements each associated with a reflector.
  • the antenna according to the invention comprises a coupling of two sets of antenna elements each comprising four interconnected radiating elements each associated with a reflector.
  • the antenna according to the invention comprises a first set of antenna elements or "lower set” formed of four biquad-type radiating elements 1 fixed on an insulating support 2 and whose feed centers 3 are located substantially in a same plane and a second set of antenna elements or "upper assembly” formed of four radiating elements also biquad type fixed on an insulating support 2a and whose feed centers 3a are also located in the same plan.
  • the four feeding centers 3 are located on a common circle C and at the points of intersection, with this circle, of two orthogonal diameters as well as the four centers 3a are also arranged on a common circle and also located at the points of intersection, with this circle, of two orthogonal diameters.
  • the rope underlying the arc located between two adjacent feed centers 3 or between two adjacent feed centers 3a is equal to a wavelength ⁇ .
  • the biquads of each set are tangent to the common circle passing through their feeding centers.
  • the radiating elements 1 of the lower assembly and the radiating elements 1a of the upper assembly form, when taken together, four groups of radiating elements 1; 1a, each group being arranged on a single insulating support resulting in fact from the melting of an insulating support 2 with an insulating support 2a.
  • the feed centers of two adjacent radiating elements of the same group are isolated from each other by a distance equivalent to 2 ⁇ / 3.
  • These biquads radiating elements 1 and 1a are in the form of circuits, corresponding to copper tracks, printed on the single insulating support 2; 2a FR4 type epoxy glass.
  • each insulating support 2; 2a is itself fixed, at a precise distance and by means of insulators 4, nylon or teflon, a reflector 5 consists of an aluminum plate AG4MC type.
  • the four metal plates 5 attached to a base plate 6 of aluminum or fiberglass thus form the basic structure of the antenna according to the invention which is covered with a cap 7 for reinforcing this structure.
  • FIGS. 2 and 3 also show that the radiating elements of each set are interconnected by means of four-way couplers indicated respectively 8 and 8a, these two couplers themselves being interconnected via the two-way coupler 9. It is further observed that the output of this two-way coupler is also connected to a spark arrester 10 calibrated at 2.46 Mhz itself connected to ground.
  • the antenna according to the invention is manufactured by first welding an SMA / KYB3 type connector at the feed center of each biquad element after having previously pierced the insulating supports 2; 2a.
  • prefabricated coaxial cables ending in a copper strand welded laterally to the ground, which must slightly protrude at its end, are used.
  • the four insulating supports 2 are assembled; 2a carriers of the radiating elements 1 in the form of printed circuits and on the respective faces of the four metal plates by means of insulators 4, threaded screws and nylon nuts.
  • two of the four reflectors 5 are assembled on the base plate 6, in this case two opposite reflectors.
  • the four-way couplers which are connected to the connectors of the different radiating elements associated with the two plates 5 in question are inserted, namely the coupler 8 to the radiating elements 1, the coupler 8a to the radiating elements 1a and the coupler 9 is connected to two channels to two four-way couplers.
  • the output 11 of the two-way coupler is then connected to a coaxial antenna output cable terminated by a female SMA element which is fixed to the base plate 6 via the surge arrester 10 riveted thereto.
  • the antenna according to the invention has proved to be usable not only at 2.4 GHz, for Wi-Fi type applications, but also at 3.5 GHz and 5.9 GHz for Wimax applications, such as Wimax 1 and Wimax 2. Under optimal conditions, for example by calm sea, the range of this antenna is at least 13 km while in extreme weather conditions, such as heavy snow, this range is around 2 km . On the other hand, its easy realization and above all its very low cost allow, on the antenna according to the invention, to validly compete with a fiber optic data transmission technology of the ADSL type.

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  • Aerials With Secondary Devices (AREA)

Claims (9)

  1. Multiband-Rundstrahlantenne für die Übertragung und/oder den Empfang von Audio- und/oder Videosignalen, wobei die Antenne aus in einer Einheit miteinander verbundenen identischen Antennenelementen besteht und jedes Antennenelement jeweils ein in vertikal linearer Polarisation Strahlelement umfasst (1), wobei jedes Strahlelement aus den zwei an den überschneidenden Eckpunkten zusammengeführten Vierecken gebildet, mit einem radio-elektrischen Lastkreis (3) ausgestattet und mit einem Reflektor (5) verknüpft wird, so dass sich jeder radio-elektrische Lastkreis in einem gemeinsamen Zirkel (C) befindet und die radio-elektrische Lastkreise zweier sich angrenzender Strahlelemente durch eine Wellenlänge λ getrennt wird, dadurch gekennzeichnet, dass sie aus am wenigstens zwei vernetzten Einheiten von Antennenelementen besteht, wobei jede Einheit von Antennenelementen ein Strahlelement (1) einschließt, dessen radio-elektrischer Lastkreis (3) sich auf einer gemeinsamen Linie mit dem radio-elektrischen Zentrum (3a) eines Strahlelements (1a) befindet, welches Zentrum in jedem der anderen vernetzten Einheiten von Antennenelementen eingeschlossen ist, indem Gruppen von Strahlelementen gebildet werden, wobei zwei nebenliegenden radio-elektrische Lastkreise (3; 3a) einer Gruppe im wesentlichen eine Distanz von 2 λ/3 zueinander bilden, so dass die Antenne gemäß einer Bandbreite und einer Oberwelle in Resonanz kommt.
  2. Antenne nach Anspruch 1 dadurch gekennzeichnet, dass sie aus zwei vernetzten Einheiten von Antennenelementen besteht.
  3. Antenne nach Anspruch 1 oder 2 dadurch gekennzeichnet, dass jede Einheit eine identische Anzahl von vernetzten Antennenelementen erfassen.
  4. Antenne nach Anspruch 1 bis 3 dadurch gekennzeichnet, dass jede Einheit aus vier vernetzten Antennenelementen besteht.
  5. Antenne nach Anspruch 1 bis 4 dadurch gekennzeichnet, dass die Strahlelemente einer Gruppe von Strahlelementen auf die gleiche Ebene sind und so voneinander getrennt, dass jede Seite des Vierecks eines Strahlelements parallel zu der korrespondierenden Seite einer oder mehrerer anderen Strahlelemente der selben Gruppe liegen, wobei die radio-elektrischen Lastkreise entsprechend einer die Vierecke nicht überschneidenden Linie ausgerichtet sind.
  6. Antenne nach Anspruch 1 bis 5 dadurch gekennzeichnet, dass jedes Strahlelement aus einer doppelten Endlosschleife gebildet ist, die die geometrische Form zweier Quadrate mit einem auf einer Ebene liegenden gemeinsamen Scheitelpunkt annimmt, dessen Perimeter im wesentlichen zwei Wellenlängen (2 λ) entsprechen.
  7. Antenne nach Anspruch 1 bis 6 dadurch gekennzeichnet, dass das Strahlelement die Form einer auf einer stützenden isolierten Leiterplatte gedruckten Schaltung einnimmt.
  8. Antenne nach Anspruch 1 bis 7 dadurch gekennzeichnet, dass sie aus einer Koppelung zweier Antennenelemente bestehen, wobei de Antennenelemente jeweils aus vier vernetzten Strahlelementen (1 oder 1a) bestehen, die wiederum mit je einem Reflektor vernetzt sind.
  9. Antenne nach Anspruch 1 bis 8 dadurch gekennzeichnet, dass sie bei 2,4 GHz, 3,5 GHz oder 5,9 GHz in Resonanz kommt.
EP20090447003 2009-03-04 2009-03-04 Multiband-Rundstrahler Not-in-force EP2226896B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20090447003 EP2226896B1 (de) 2009-03-04 2009-03-04 Multiband-Rundstrahler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20090447003 EP2226896B1 (de) 2009-03-04 2009-03-04 Multiband-Rundstrahler

Publications (2)

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EP2226896A1 EP2226896A1 (de) 2010-09-08
EP2226896B1 true EP2226896B1 (de) 2014-04-16

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EP20090447003 Not-in-force EP2226896B1 (de) 2009-03-04 2009-03-04 Multiband-Rundstrahler

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2733788A1 (de) 2012-11-20 2014-05-21 Philippe Herman Monoband-Rundstrahler

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4479127A (en) * 1982-08-30 1984-10-23 Gte Products Corporation Bi-loop antenna system
DE19603803C2 (de) * 1996-02-02 2001-05-17 Niels Koch Quad-Antenne, auf einem isolierenden Material und Verfahren zu deren Fertigung
SI1523062T1 (sl) * 2003-10-07 2006-08-31 Philippe Herman V vse smeri sevajoca antena za oddajanje in sprejemanje audio/video signalov
ATE408905T1 (de) * 2006-07-07 2008-10-15 Philippe Herman Richtantenne zum senden und/oder empfangen von audio/video signalen

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