EP2466684B1 - Antennenumschaltungssystem - Google Patents

Antennenumschaltungssystem Download PDF

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Publication number
EP2466684B1
EP2466684B1 EP11193170.5A EP11193170A EP2466684B1 EP 2466684 B1 EP2466684 B1 EP 2466684B1 EP 11193170 A EP11193170 A EP 11193170A EP 2466684 B1 EP2466684 B1 EP 2466684B1
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EP
European Patent Office
Prior art keywords
ground plane
antenna system
radiating elements
neutralization line
antenna
Prior art date
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EP11193170.5A
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English (en)
French (fr)
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EP2466684A1 (de
Inventor
Aliou Diallo
Philippe Le Thuc
Cyril Luxey
Marcio Silva-Pimenta
Robert Staraj
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Centre National de la Recherche Scientifique CNRS
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Centre National de la Recherche Scientifique CNRS
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • H01Q1/523—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between antennas of an array
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
    • 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
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element

Definitions

  • the present invention relates to a diversity antenna system.
  • the invention relates to such an antenna system which comprises ground plane means, on which are disposed at least two radiating elements and an inter-element decoupling neutralization line.
  • the invention is concerned with the reduction of the electromagnetic coupling which naturally exists between two radiating elements placed on the same support, which makes it possible to improve the performance of multi-antenna systems in MIMO for "Multiple Input-Multiple Output”. Still called for multiple entries and exits or diversity.
  • neutralization This technique is called neutralization and the corresponding line is called the neutralization line.
  • the object of the invention is therefore to solve these problems.
  • US 1 708 944 A describes a system for neutralizing the capacitive coupling effects between two antennas operating at different frequencies f1 and f2 by interposing, at the foot of each antenna, a first resonant circuit having a resonance with f1 and a second anti-resonant circuit having a resonance at f2 in order to cancel the currents flowing between the antennas at these frequencies.
  • US 2009/027286 A1 is intended to improve the insulation between antenna elements mounted on a printed circuit board.
  • the printed circuit comprises a metal layer covered with a dielectric layer.
  • two paths are offered to the current flowing from one antenna to another, the difference in the electrical lengths of these paths being maintained at half the operating wavelength of the antennas to eliminate the couplings.
  • EP 1 777 773 A1 discloses a circuit whose capacity can be adjusted
  • the subject of the invention is an antenna system as defined in claim 1.
  • a diversity antenna system which is designated by the general reference 1 and which comprises ground plane means designated by the general reference 2 on which are disposed at least two radiating elements designated by the references 3 and 4.
  • These radiating elements are for example two antennas of PIFA type of conventional type.
  • Each of these antennas is then associated with a power supply line such as the line designated by the general reference 5 for the antenna 3 and by the general reference 6 for the antenna 4.
  • Each antenna is also connected to a connection line to the ground plane, also called a short-circuit line, designated by the general reference 7 for the antenna 3 and by the general reference 8, for the antenna 6.
  • An inter-element decoupling neutralization line is also illustrated in this figure and is designated by the general reference 9.
  • this neutralization line can be associated as illustrated in the supply lines of the radiating elements or to the connection lines to the ground plane thereof.
  • this neutralization line 9 is suspended between the radiating elements 3 and 4.
  • this neutralization line can be integrated in the ground plane, or formed partly by the ground plane to which are connected conductive elements connected to the radiating elements and in part by these conductive elements.
  • the neutralization line is associated with at least one active component having at least one controllable impedance characteristic for controlling the inter-decoupling frequency. -Elements.
  • this neutralization line is associated with an active component having at least one controllable impedance characteristic for controlling the inter-element decoupling frequency.
  • This active component is designated by the general reference 10 on this figure 3 and is formed by a Varicap diode.
  • this active component may be envisaged, the latter having to have at least one impedance characteristic that can be controlled, for example in voltage or current.
  • an active component has been integrated in this neutralization line, of which at least one of the electrical properties can be controlled for example by a DC voltage.
  • a neutralization line as defined in the state of the art, connected between two points of two radiating elements makes it possible, when it is passive, to reduce the coupling observed between accesses for a given frequency band.
  • the active component used is a Varicap diode.
  • This component has the property to present between its terminals, a variable capacitance whose value can be fixed by a DC voltage applied in reverse, the diode must remain blocked.
  • the neutralization line previously described as being suspended may for example also be printed on a thin substrate.
  • the control bias voltage of the diode can be supplied by one of the supply lines also serving as a power supply. Antenna power supply in RF radio frequency.
  • the other polarization point is ensured by the connection of the diode to the ground plane, that is to say for example to the printed circuit board.
  • the figure 4 illustrates the feasibility of this structure.
  • the technique of the conventional neutralization line generally makes it possible simultaneously to obtain good reflection coefficients for a band of frequency in which the isolation coefficients are also optimized as previously described.
  • the reflection coefficient on access 1 is S11.
  • S22 is the coefficient that can be read on input 2. This is theoretically identical to S11 in a symmetric structure, so it is not usually presented.
  • this technique can be applied to radiating elements that are already initially broad bands and therefore capable of absorbing these variations.
  • the insulation cavity visible on the figure 4 , is controlled in the UMTS band and makes it possible to obtain very good performances on the parameter S21 for the chosen frequency.
  • the parameter S11 is not optimized on the same frequency values because its variation is slower depending on the capacity. But over the entire UMTS band chosen, it remains below the value of -7 dB which is a value generally considered critical in applications such as mobile telephony.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)

Claims (9)

  1. Diversitätsantennensystem vom Typ, der eine Massenebene bildende Mittel (2) aufweist, auf denen mindestens zwei strahlende Elemente (3, 4) vom Funkfrequenz-RF-Typ und eine Interelemententkopplungsneutralisationsleitung (9) angeordnet sind, wobei die Neutralisationsleitung (9) mindestens eine aktive Komponente (10) integriert, dadurch charakterisiert, dass die aktive Komponente mindestens eine Varicap-Diode aufweist, die mindestens eine Spannungs-steuerbare Impedanzcharakteristik zum Steuern der Interelement-Entkopplungsfrequenz aufweist, wobei die Steuervorspannung der Varicap-Diode mittels der einen der Versorgungsleitungen zugeführt wird, die auch zur Versorgung der strahlenden Elemente dient, wobei der andere Verbindungspunkt der Diode durch die Verbindung der Varicap-Diode mit der Masseebene sichergestellt wird.
  2. Antennensystem nach Anspruch 1, dadurch gekennzeichnet, dass die Neutralisationsleitung (9) Versorgungsleitungen (5, 6) der strahlenden Elemente (3, 4) zugeordnet ist.
  3. Antennensystem nach Anspruch 1, dadurch gekennzeichnet, dass die Neutralisationsleitung (9) Verbindungsleitungen (7, 8) zur Masseebene (2) der strahlenden Elemente (3, 4) zugeordnet ist.
  4. Antennensystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Neutralisationsleitung (9) zwischen den strahlenden Elementen (3, 4) aufgehängt ist.
  5. Antennensystem nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Neutralisationslinie (9) in die Bodenebene (2) integriert ist.
  6. Antennensystem nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Neutralisationsleitung (9) teilweise von der Masseebene (2), mit der leitende Elemente, die mit den strahlenden Elementen (3, 4) verbunden sind, angeschlossen sind, und teilweise durch diese leitfähigen Elemente gebildet wird.
  7. Antennensystem nach einem der vorhergehenden Ansprüche, dadurch charakterisiert, dass es Funkfrequenz/Gleichstromversorgungs-RF/DC-Entkopplungen aufweist, wegen der Präsenz von Kurzschlussleitungen, die direkt mit der Masseebene verbunden sind, mittels ringförmiger Schlitze, die um die Verbindungspunkte der Leitungen auf der Leiterplatte angebracht sind.
  8. Antennensystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die die Massenebene bildenden Mittel (2) eine Leiterplatte aufweisen.
  9. Antennensystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die strahlenden Elemente (3, 4) vom PIFA-Typ sind.
EP11193170.5A 2010-12-14 2011-12-13 Antennenumschaltungssystem Active EP2466684B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1060498A FR2968845B1 (fr) 2010-12-14 2010-12-14 Systeme d'antenne en diversite

Publications (2)

Publication Number Publication Date
EP2466684A1 EP2466684A1 (de) 2012-06-20
EP2466684B1 true EP2466684B1 (de) 2019-06-19

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EP11193170.5A Active EP2466684B1 (de) 2010-12-14 2011-12-13 Antennenumschaltungssystem

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EP (1) EP2466684B1 (de)
FR (1) FR2968845B1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI523324B (zh) * 2012-09-14 2016-02-21 宏碁股份有限公司 通訊裝置
CN103682626B (zh) * 2012-09-20 2017-01-25 宏碁股份有限公司 通信装置
CN104701609B (zh) * 2013-12-05 2018-01-05 宏碁股份有限公司 具有耦合馈电多频天线元件的通信装置
EP3123560B1 (de) * 2014-03-27 2022-08-10 Hirschmann Car Communication GmbH Antennensystem mit verbesserter dekorrelation
FR3021164B1 (fr) 2014-05-19 2018-05-11 Centre National De La Recherche Scientifique Systeme d'antennes pour reduire le couplage electromagnetique entre antennes
CN108899634A (zh) * 2018-06-07 2018-11-27 普联技术有限公司 一种ifa天线及通信设备
FR3084779B1 (fr) 2018-08-02 2022-01-21 Commissariat Energie Atomique Dispositif d'antenne comportant au moins deux antennes a meme substrat de raccordement electrique

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006042111A (ja) * 2004-07-29 2006-02-09 Matsushita Electric Ind Co Ltd アンテナ装置
US20090027286A1 (en) * 2007-07-27 2009-01-29 Kabushiki Kaisha Toshiba Antenna apparatus and wireless device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1708944A (en) * 1920-08-17 1929-04-16 Western Electric Co System for neutralizing capacitive reactance between two circuits placed close to each other
US7352264B2 (en) * 2005-10-24 2008-04-01 M/A-Com, Inc. Electronically tunable dielectric resonator circuits

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006042111A (ja) * 2004-07-29 2006-02-09 Matsushita Electric Ind Co Ltd アンテナ装置
US20090027286A1 (en) * 2007-07-27 2009-01-29 Kabushiki Kaisha Toshiba Antenna apparatus and wireless device

Also Published As

Publication number Publication date
EP2466684A1 (de) 2012-06-20
FR2968845B1 (fr) 2013-01-11
FR2968845A1 (fr) 2012-06-15

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