EP2309596A1 - Strahlungselement einer Dualpolarisationsantenne - Google Patents

Strahlungselement einer Dualpolarisationsantenne Download PDF

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Publication number
EP2309596A1
EP2309596A1 EP10182687A EP10182687A EP2309596A1 EP 2309596 A1 EP2309596 A1 EP 2309596A1 EP 10182687 A EP10182687 A EP 10182687A EP 10182687 A EP10182687 A EP 10182687A EP 2309596 A1 EP2309596 A1 EP 2309596A1
Authority
EP
European Patent Office
Prior art keywords
dipoles
radiating element
polarization
pair
dielectric medium
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.)
Granted
Application number
EP10182687A
Other languages
English (en)
French (fr)
Other versions
EP2309596B1 (de
Inventor
Patrick Lecam
Aurélien Hilary
Jérôme Plet
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
Original Assignee
Alcatel Lucent SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Alcatel Lucent SAS filed Critical Alcatel Lucent SAS
Publication of EP2309596A1 publication Critical patent/EP2309596A1/de
Application granted granted Critical
Publication of EP2309596B1 publication Critical patent/EP2309596B1/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
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • H01Q21/26—Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
    • 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
    • H01Q9/06—Details
    • H01Q9/065—Microstrip dipole antennas
    • 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
    • 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
    • H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
    • H01Q9/285—Planar dipole

Definitions

  • the present invention pertains to a dual-polarization antenna's radiating element.
  • the radiating element comprises two orthogonal dipoles each comprising two conducting elements; each conducting element is folded into a V to form two wings, mounted on a reflector or ground plane.
  • this configuration has a directivity limitation. As the surface currents traveling through the wings are limited, it is at best equivalent to two half-wave dipoles arranged orthogonally.
  • TV radiating elements are also known, used in television transmission antennas. Their cast structure is fairly difficult to construct. Additionally, this structure requires that the radiating element is supplied by four coaxial cables,
  • So-called "patch” radiating elements are also known, printed on a printed circuit board (PCB), for which multilayer techniques should be used in order to achieve the desired characteristics.
  • PCB printed circuit board
  • These radiating elements are generally made up of a square conducting surface which is approximately a half-wavelength on each side.
  • the currents, which are neither concentrated nor guided, are distributed across the entire square surface, which results in lower polarization purity.
  • the usable frequency band is narrow, about ⁇ 5% around the central frequency.
  • the purpose of the present invention is to implement a dual-polarization antenna's radiating element having a very large current surface area, and consequently a maximized directivity.
  • Another purpose of the invention is to propose a dual-polarization antenna's radiating element whose radio-etectric characteristics are stable over a very large frequency band.
  • Another purpose of the invention is to propose a dual-polarization antenna's radiating element whose volume and cost are minimized:
  • the object of the present invention is a dual-polarization antenna's radiating element comprising a pair of half-wave dipoles for each polarization, each dipole forming a conductive rectangular plane whose ends are folded onto the central section, and a junction formed of a conducting strip ensuring the connection between the two dipoles with the same polarization.
  • the dipoles are arranged on a first face of a dielectric medium, each dipole pair being respectively supplied by a microband conducting line arranged on the second face opposite the dielectric medium.
  • the conducting lines respectively supplying each of the dipole pairs are placed within the same plane, and a jumper cable ensures that one line overlaps the other at the crossing point.
  • the junction is connected to the dipole at a point where the current is at a maximum and voltage is at a minimum, which makes it possible not to change the distribution of currents within the radiating element.
  • each polarization's pair of dipoles is supplied by a single coaxial cable.
  • the coaxial cable is connected to a supply line, for example a microstrip, which supplies each pair of dipoles.
  • a single pair's dipoles are separated from one another by a distance of a half-wavelength.
  • the dipoles are printed onto the lower surface of the dielectric medium, and the conducting lines are printed onto the upper surface of the dielectric medium.
  • At least one of the components of the radiating element chosen from among the dipoles, injunctions, and the supply lines is cut from a thin metal plate.
  • a pair of dipoles and the corresponding junction is cut from a single piece within a thin metal plate.
  • the invention discloses a radiating element which is equivalent to two half-wave dipoles for each polarization, owing to surface currents traveling over a larger surface area than in a "butterfly" radiating element of the prior art.
  • This radiating element's directivity is greater than for the radiating elements of the prior art, only a reflecting plane with lower dimensions is needed to lead to an equivalent beamwidth.
  • the backfire value is lower. Consequently, the double-polarization antennas resulting from the joining of these radiating elements is smaller and thicker than the antennas of the prior art.
  • the inventive radiating element is mechanically very simple, and includes fewer parts than the radiating elements of the prior art.
  • it includes only two coaxial cables, a ground plane or reflector with reduced surface area, and potentially an insulating plane substrate, for example such as the one used for a printed circuit board, compared with the many parts used for constructing the radiating elements of the prior art.
  • the construction of the inventive radiating element does not require any welding, and minimizes the materials used.
  • the radiating element is large-band, owing to the coupling of the half-wave dipoles, which makes it possible to reduce the distance between the dipoles and the reflector, and therefore to achieve a less thick antenna. It is no longer necessary to add a balun.
  • the inventive radiating element may be used in large-band antennas, typically including multiple bands, for example DCS, PCS, and UMTS. It is possible to adapt the impedance to a large frequency band by using the significant surface area available for the microstrip line.
  • a further object of the invention is a double-polarization antenna comprising radiating elements as described above.
  • a radiating element 1 is mounted onto a metal plate serving as a reflector 2 placed a short distance away, about one quarter-wavelength of the radiating element 1.
  • the reflector's 2 edges are folded or shaped so as to enable adjustment of the radiation pattern.
  • the double-polarization radiating element 1 comprises, for the first polarization, a first dipole 3 and a second dipole 4, and for the second polarization, a third dipole 5 and a fourth dipole 6.
  • the dipoles 3, 4, 5, 6 are rectangular planes forming "C" shapes, the two ends 7 being folded onto the central section 8 so as to create a T-shaped slope 9 between these sections.
  • a junction 10, 11 in the form of a strip joins the two dipoles 3, 4 and 5, 6 of the same pair.
  • the jonction 10, 11 is connected to the dipoles 3, 4, 5, 6 at points where the current is at a maximum and voltage is at a minimum, which makes it possible to not change the distribution of currents within the radiating element.
  • the dipoles of each pair 3, 4 and 5, 6 are separated from one another by a distance of a half-wavelength.
  • the dipoles 3, 4, 5, 6 as well as their respective junctions 10, 11 are printed onto the lower face of the dielectric medium 12 of a printed circuit.
  • the upper face of the dielectric medium 12 supports the microstrip supply lines 13 of each of the dipoles.
  • the junctions 10, 11 of the dipoles 3, 4, 5, 6 are used as a ground plane for the microstrip line 13.
  • the pair of two dipoles 3, 4 and 5, 6 for each polarization is directly supplied near the center of the radiating element 1 by a single coaxial cable 14, each cable 14 supplying the microstrip lines 13 associated with one of the junctions 10 or 11.
  • a jumper cable 15 ensures that the microstrip lines 13 overlap one another at their crossing point.
  • Having coplanar microstrip lines 13 affords many advantages when constructing radiating elements 1, particularly in terms of form factor, complexity of assembly, and cost.
  • the problem of minimizing the volume and cost of the radiating element 1 in comparison to existing elements has thereby been solved. This is because when the supply lines are arranged on either side of the dielectric medium, this requires using two dielectric medium thicknesses separated by a ground plane. Additionally, the grounding of the dipoles, via the braid surrounding the coaxial cable, becomes very complicated. In this situation, it is understood that, particularly owing to its more complicated construction and the increase in the quantity of materials needed, the final product is much more expensive than the radiating element 1 of the invention.
  • Dipoles 3, 4, 5, 6 may be constructed by etching a copper substrate of the type used to create printed circuit boards.
  • a conductive paint can also be used, or the technique of screenprinting.
  • This concept enables the proximity between the radiating element 1 and the reflector 2 leading to a total antenna thickness which may be less than 80 mm. and preferentially about 60 mm for the GSM 900 and, as opposed to 85 mm at present.
  • the radiating element 1 enables satisfactory uncoupling (approximately 30 dB of insulation) between the two layers of dipoles 3, 4 and 5, 6.
  • the pair of dipoles 30, 31 and their junction 32 are directly tied into a thin conductive plate, for example from a single part.
  • a substrate with a large surface area is no longer necessary, and the supply lines 33 may be placed directly onto the cut plate, with a localized insulating substrate being placed in between.
  • the supply lines 33 may also be cut from a thin conductive plate. In this situation, the jumper cable may be created directly by folding the cut plate.
  • FIG. 4 which depicts the radiation pattern of the radiating element, will now be considered.
  • the bell-shaped group of curves 40 corresponds to the co-polarization components
  • the V-shaped group of curves 41 corresponds to the cross-section polymerization component, respectively for frequencies of 800 MHz, 900 MHz, 1 GHz, and 1.1 GHz.
  • the cross-section polymerization depicted by the V-shaped curves 41 must be minimized.
  • the usable frequency band is about ⁇ 21% around the central frequency.
  • the beamwidth ⁇ 42 is about 60° to 65°, and the variation in the opening 43 (gap between the curves) remains very low within the frequency band studied (800 MHz to 1.1 GHz).
  • Figure 5 depicts the reflection coefficient C for the two pairs of dipoles and the insulation I between these pairs.
  • the reflection coefficient 50, 51 remains greater than 15dB for each of the two pairs of dipoles over a frequency band of 850 MHz to 1180 MHz.
  • the usable frequency band is about ⁇ 16.5% around the central frequency, as opposed to about ⁇ 10% around the central frequency for a "patch" radiating element of the prior art.
  • the insulation 52 between the two pairs of dipoles remains better than 26dB over an extremely broad frequency band.

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  • Variable-Direction Aerials And Aerial Arrays (AREA)
EP20100182687 2009-09-30 2010-09-29 Strahlungselement einer Dualpolarisationsantenne Not-in-force EP2309596B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0956813A FR2950745B1 (fr) 2009-09-30 2009-09-30 Element rayonnant d'antenne a double polarisation

Publications (2)

Publication Number Publication Date
EP2309596A1 true EP2309596A1 (de) 2011-04-13
EP2309596B1 EP2309596B1 (de) 2012-06-20

Family

ID=42025806

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100182687 Not-in-force EP2309596B1 (de) 2009-09-30 2010-09-29 Strahlungselement einer Dualpolarisationsantenne

Country Status (2)

Country Link
EP (1) EP2309596B1 (de)
FR (1) FR2950745B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3878528A1 (de) 2020-03-13 2021-09-15 Salewa Sport AG Vordereinheit für eine skibindung mit einer einstiegshilfe
EP3878527A1 (de) 2020-03-13 2021-09-15 Salewa Sport AG Vordereinheit für eine skibindung mit definiertem öffnungsgegenanschlag an der grundplatte
DE102020203278A1 (de) 2020-03-13 2021-09-16 Salewa Sport Ag Vordereinheit für eine Skibindung mit einer magnetischen Einstiegshilfe
CN115020969A (zh) * 2022-05-30 2022-09-06 南京信息工程大学 一种应用于5g微基站的宽带极化可重构天线
EP4494722A1 (de) 2023-07-21 2025-01-22 Salewa Sport AG Vordereinheit für eine tourenbindung, umfassend ein verschleissminderndes element

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2691121C1 (ru) * 2018-06-09 2019-06-11 Акционерное общество "Научно-производственное объединение Измерительной техники" (АО "НПО ИТ") Двухполяризационная антенна

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2231128A1 (en) * 1973-05-21 1974-12-20 Dubost Gerard Folded dipole network - is used for wide band directional system capable of handling circular polarisations
FR2311422A1 (fr) * 1975-05-15 1976-12-10 France Etat Doublet replie en plaques
EP0895303A1 (de) * 1997-07-28 1999-02-03 Alcatel Richtantennensystem mit gekreuzter Polarisation
US6313809B1 (en) * 1998-12-23 2001-11-06 Kathrein-Werke Kg Dual-polarized dipole antenna
US20070241983A1 (en) * 2006-04-18 2007-10-18 Cao Huy T Dipole antenna

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2231128A1 (en) * 1973-05-21 1974-12-20 Dubost Gerard Folded dipole network - is used for wide band directional system capable of handling circular polarisations
FR2311422A1 (fr) * 1975-05-15 1976-12-10 France Etat Doublet replie en plaques
EP0895303A1 (de) * 1997-07-28 1999-02-03 Alcatel Richtantennensystem mit gekreuzter Polarisation
US6313809B1 (en) * 1998-12-23 2001-11-06 Kathrein-Werke Kg Dual-polarized dipole antenna
US20070241983A1 (en) * 2006-04-18 2007-10-18 Cao Huy T Dipole antenna

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3878528A1 (de) 2020-03-13 2021-09-15 Salewa Sport AG Vordereinheit für eine skibindung mit einer einstiegshilfe
EP3878527A1 (de) 2020-03-13 2021-09-15 Salewa Sport AG Vordereinheit für eine skibindung mit definiertem öffnungsgegenanschlag an der grundplatte
DE102020203280A1 (de) 2020-03-13 2021-09-16 Salewa Sport Ag Vordereinheit für eine Skibindung mit definiertem Öffnungsmaß
DE102020203278A1 (de) 2020-03-13 2021-09-16 Salewa Sport Ag Vordereinheit für eine Skibindung mit einer magnetischen Einstiegshilfe
DE102020203281A1 (de) 2020-03-13 2021-09-16 Salewa Sport Ag Vordereinheit für eine skibindung mit einer einstiegshilfe
CN115020969A (zh) * 2022-05-30 2022-09-06 南京信息工程大学 一种应用于5g微基站的宽带极化可重构天线
CN115020969B (zh) * 2022-05-30 2023-05-09 南京信息工程大学 一种应用于5g微基站的宽带极化可重构天线
EP4494722A1 (de) 2023-07-21 2025-01-22 Salewa Sport AG Vordereinheit für eine tourenbindung, umfassend ein verschleissminderndes element
DE102023119387A1 (de) 2023-07-21 2025-01-23 Salewa Sport Ag Vordereinheit für eine Tourenbindung, umfassend ein verschleißminderndes Element

Also Published As

Publication number Publication date
FR2950745A1 (fr) 2011-04-01
EP2309596B1 (de) 2012-06-20
FR2950745B1 (fr) 2012-10-19

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