EP2430705A1 - Antenne multifaisceaux compacte - Google Patents
Antenne multifaisceaux compacteInfo
- Publication number
- EP2430705A1 EP2430705A1 EP10721757A EP10721757A EP2430705A1 EP 2430705 A1 EP2430705 A1 EP 2430705A1 EP 10721757 A EP10721757 A EP 10721757A EP 10721757 A EP10721757 A EP 10721757A EP 2430705 A1 EP2430705 A1 EP 2430705A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna
- frequency
- sets
- elements
- substrate
- 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
Links
Classifications
-
- 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
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
- H01Q21/065—Patch antenna array
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/24—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
Definitions
- the invention relates to the field of single-frequency or multi-frequency multibeam antennas intended to transmit / receive a radio frequency signal in a plurality of directions.
- Obtaining one or more directional antenna beams is to the detriment of the size of the antenna. Indeed, the more the antenna must be directive (that is to say that it is desired to have an antenna that can radiate in a preferred direction or several directions and must have several independent beams) plus its radiating surface must be important.
- Figure 1 illustrates a multi-beam antenna of known type. This antenna, consisting of three panels Pi, P 2 , P 3 , can operate in three directional beams.
- This antenna - see FIG. 2 - comprises a ground plane P and a dielectric substrate 1 1 having a dielectric constant ⁇ ⁇ .
- the substrate 1 1 is disposed on the plane P of mass.
- the antenna further comprises a plurality of sets Ej of antenna elements, these antenna elements Sy are arranged on the substrate 1 1 (i corresponds to the number of the set and j to the number of the element d antenna in the set i).
- the antenna elements Sy are adapted to transmit / receive a radiofrequency signal in a given direction so that each set Ej is associated with a direction of the antenna.
- the antenna is considered to transmit / receive the signal in one or more frequency bands in different directions defined by each panel.
- FIG. 2 schematically illustrates an assembly Ej of antenna elements SN.
- the elements Sy are fed according to a law of distribution (ay, ⁇ y), ay being the amplitude of the signal emitted or received and ⁇ y its phase.
- This law is applied to each group of sets i (formed of antenna elements j) of the same panel in order to form a coherent radiation pattern and favoring a given direction Ai, A 2 , A 3 , normally a given azimuth in the horizontal plane.
- the elements Ej are fed in series or in tree structure.
- FIGS. 3a and 3b respectively show a view from above and a profile view of the ground plane P with the substrate 1 1 and an antenna element S M used in known type antennas.
- the sets corresponding to the same direction are arranged in several columns, typically up to four columns.
- the columns are also arranged side by side.
- a problem is that such an arrangement is cumbersome in particular in view of having more and more directional antennas, that is to say, can radiate in several directions. Indeed, it would be necessary to add columns.
- the invention makes it possible to have a multibeam antenna of reduced size compared with known antenna solutions of the same type.
- the invention relates to a multibeam antenna for transmitting / receiving a radiofrequency signal in a plurality of directions in at least one frequency band, the antenna comprising: a ground plane; a dielectric substrate having a permittivity, the substrate being disposed on the ground plane; a plurality of sets of antenna elements disposed on the substrate, each set corresponding to a direction of the antenna.
- the antenna according to the invention is characterized in that it further comprises a dielectric superstrate, having a permittivity greater than the permittivity of the substrate, arranged on the sets of antenna elements, and in that the assemblies are interwoven one below the other so as to form a column, the sets corresponding to the same direction of the antenna being separated by a set number equal to the number of directions of the antenna.
- the antenna according to the invention may also have one or more of the following characteristics: the antenna elements of the same set are spaced apart by a distance less than a wavelength ⁇ , the length of corresponding wave ⁇ in the single-frequency case at the frequency at which the antenna is to operate and in the multifrequency case at the center frequency defined by (f ma ⁇ -f m i n ) / 2 where Uax is the maximum frequency at which the antenna antenna must operate and f min is the minimum frequency at which the antenna must operate;
- the antenna elements belonging to different sets are spaced apart by a distance less than ⁇ / n, where ⁇ corresponds to: in the single-frequency case, to the frequency at which the antenna must operate; in the multifrequency case, at the central frequency defined by (f ma ⁇ -fmin) / 2 where f max is the maximum frequency at which the antenna must operate and Wi is the minimum frequency at which the antenna must operate; and where n is the number of different sets (Ei);
- each set comprises an identical number of antenna elements;
- the antenna elements are square patches, in the shape of an equilateral triangle or ellipsoidal shape;
- Antenna elements are orthogonal dual polarization patches with two independent accesses to achieve polarization diversity.
- the antenna according to the invention is single frequency or multifrequency and in each frequency band can have several beam directions.
- the invention relates to a cellular communication network comprising an antenna the first aspect of the invention.
- FIG. 4 illustrates a multibeam antenna according to the invention
- FIGS. 5a and 5b respectively show a view from above and a profile view of the ground plane with a dielectric substrate and superstrate and an antenna element of the antenna of the invention
- FIGS. 6a and 6b respectively illustrate a square patch and an equilateral triangle-shaped patch implemented in the antenna of the invention
- FIG. 7 illustrates a single-frequency three-beam antenna according to the invention
- FIG. 8 illustrates an arrangement of the antenna elements in a set for a two-frequency antenna according to the invention
- FIG. 9 illustrates the variation of the coupling between two sets of antenna elements as a function of the difference between the elements for the elements of an antenna of known type and for smaller elements, implemented in an antenna. of the invention having identical radiation characteristics
- FIG. 10 illustrates the performances in terms of isotropic gain of the antenna elements of an antenna of known type and for an antenna with smaller elements implemented in an antenna of the invention, having characteristics of identical radiation.
- FIGS. 11a and 11b illustrate the size reduction of a dipole into a monopole used in the antenna of the invention
- FIG. 12 illustrates a profile view of the ground plane with a dielectric substrate and superstrate and an antenna element of the antenna of the invention to explain the dimensions of the antenna element.
- FIG. 4 illustrates a multibeam antenna having a small footprint compared to multibeam antennas of known type (see antenna of FIG. 1).
- FIGS 5a and 5b illustrate, respectively, a top view and a side view of the ground plane P with the substrate 1 1, the superstrate 12 and an antenna element S M.
- This antenna comprises a ground plane P, a dielectric substrate 1 1 having a dielectric constant ⁇ x disposed on the ground plane P and a plurality of sets Ej of antenna elements Sy disposed on the substrate 1 1. mentioned, each set Ej corresponds to a direction of the antenna.
- the sets Ej of antenna elements Sy are interlaced below each other so as to form a column and the sets Ej which correspond to the same direction of the antenna are separated an ensemble number equal to the number of direction of the antenna.
- the same antenna direction is found on the column of set of antenna elements periodically, the period being equal to the number of direction of the antenna.
- Such interleaving can generate a coupling between antenna elements that are closer than in antennas of known type.
- the size of the antenna elements is reduced.
- the antenna comprises a dielectric superstrate 12 having a permittivity ⁇ 2 greater than the permittivity ⁇ x of the substrate 1 1 dielectric.
- this superstrate 12 makes it possible to maintain radiation characteristics identical to a larger antenna element.
- a resistor R is connected between the ground plane P and each antenna element Sy.
- the resistance R is typically equal to one Ohm.
- This resistor R serves to short-circuit one of the radiating sides of the antenna element.
- This short-circuit serves to transform the radiating element of size ⁇ / 2, consisting of two monopolies, each of size ⁇ / 4 on each side of the dipole, into a single monopole of size ⁇ / 4 and consequently allows to divide by two the electrical dimensions of the radiating element (see Figure 1 1).
- This resistor R also makes it possible to substantially increase the bandwidth of the antenna in its resonant behavior.
- the sets Ej which correspond to the same antenna direction are connected together in series.
- the antenna elements belonging to different sets are spaced apart by a distance less than ⁇ / n, where ⁇ corresponds to: - in the single-frequency case, to the frequency at which the antenna must operate;
- n the number of different sets (Ej). Typically we will take a spacing of less than 0.9 ⁇ / n.
- the antenna elements of the same set are spaced apart by a distance less than ⁇ .
- FIG. 7 shows a three-beam antenna A, B, C single frequency.
- the antenna elements Sy are connected to each other.
- all the sets Ei are connected to obtain a first beam A
- all the sets E 2 are connected to obtain a second beam B
- all the sets E 3 are connected to obtain a third beam C.
- the antenna elements the same set are separated by a distance of 0.5 ⁇ and the antenna elements of different sets are separated by a distance of 0.3 ⁇ (there are three different beams).
- the use of several beams uses independent and physically similar antennas with radiation patterns with different azimuths in the horizontal plane.
- This approach results in an increase in the overall surface of the antennal solution, comprising a plurality of specific antennas.
- FIG. 8 illustrates the arrangement of the antenna elements Sy in a set Ei for a two-frequency antenna.
- the number of antenna elements Sy is doubled with respect to a single-frequency antenna (see FIG. 7).
- This approach results in an increase in the overall surface of the antennal solution, comprising a plurality of specific antennas.
- a ⁇ e 1 + ⁇ 2 where ⁇ x is the dielectric constant of the substrate and ⁇ 2 is the dielectric constant of the superstrate, A 0 is the wavelength in the vacuum ⁇ is the partial contribution of the dielectric ⁇ 2 in the radiation of the cavity of the radiating element.
- This radiation takes place in effective dimensions taking into account the physical dimension d of the element and an overflow of the fields which extends over a distance approximately the value of the thickness hi of the substrate (see FIG. 12).
- ⁇ is
- Figures 6a and 6b respectively show a square patch and an equilateral triangle shaped patch, each side is of dimension d (see above).
- FIG. 9 illustrates the coupling between two sets of antenna elements as a function of the difference between the elements for the elements of the antenna of known type (curve 20) and for the smaller elements (curve 30) having identical radiation characteristics. To ensure proper operation between different systems, it is sought to obtain a coupling between different antennas less than -30 dB.
- the two antennas of known type have a coupling between them of about -10 dB whereas with the same spacing, the two antennas with the smaller antenna elements have a coupling less than -50 dB between them.
- FIG. 10 illustrates the performances in terms of isotropic gain of the antenna elements of the antenna of known type (curve 40) and for the antenna with smaller elements (curve 50).
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0953086A FR2945380B1 (fr) | 2009-05-11 | 2009-05-11 | Antenne multifaisceaux compacte. |
PCT/EP2010/056416 WO2010130714A1 (fr) | 2009-05-11 | 2010-05-11 | Antenne multifaisceaux compacte |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2430705A1 true EP2430705A1 (fr) | 2012-03-21 |
EP2430705B1 EP2430705B1 (fr) | 2014-12-10 |
Family
ID=41567267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10721757.2A Active EP2430705B1 (fr) | 2009-05-11 | 2010-05-11 | Antenne multifaisceaux compacte |
Country Status (4)
Country | Link |
---|---|
US (1) | US8704727B2 (fr) |
EP (1) | EP2430705B1 (fr) |
FR (1) | FR2945380B1 (fr) |
WO (1) | WO2010130714A1 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE544194T1 (de) * | 2005-10-14 | 2012-02-15 | Fractus Sa | Schlankes dreifachband-antennenarray für zellulare basisstationen |
FR2945380B1 (fr) | 2009-05-11 | 2011-07-08 | Bouygues Telecom Sa | Antenne multifaisceaux compacte. |
FR2965411B1 (fr) * | 2010-09-29 | 2013-05-17 | Bouygues Telecom Sa | Antenne compacte a fort gain |
US9600999B2 (en) | 2014-05-21 | 2017-03-21 | Universal City Studios Llc | Amusement park element tracking system |
ES2550133B1 (es) * | 2015-07-07 | 2016-09-09 | Telnet Redes Inteligentes, S.A. | Antena multi-haz para estación base de telefonía móvil |
US10790576B2 (en) | 2015-12-14 | 2020-09-29 | Commscope Technologies Llc | Multi-band base station antennas having multi-layer feed boards |
US10461438B2 (en) | 2016-03-17 | 2019-10-29 | Communication Components Antenna Inc. | Wideband multi-level antenna element and antenna array |
US11133586B2 (en) * | 2017-10-31 | 2021-09-28 | Communication Components Antenna Inc. | Antenna array with ABFN circuitry |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW382833B (en) | 1996-12-18 | 2000-02-21 | Allen Telecom Inc | Antenna with diversity transformation |
US6900775B2 (en) | 1997-03-03 | 2005-05-31 | Celletra Ltd. | Active antenna array configuration and control for cellular communication systems |
EP1012911A1 (fr) | 1997-09-26 | 2000-06-28 | Raytheon Company | Antenne reseau a plaques en micro-ruban a double polarisation pour stations de base de systemes de communication personnelle |
SE517649C2 (sv) * | 2000-11-06 | 2002-07-02 | Ericsson Telefon Ab L M | Gruppantenn med smala huvudlober i horisontalplanet |
DE10110256C2 (de) * | 2001-03-02 | 2003-06-18 | Siemens Ag | Antennenkombiniervorrichtung für "intelligente" Antennen |
DE60215668T2 (de) | 2001-07-26 | 2007-08-30 | Medrad, Inc. | Elektromagnetische sensoren für anwendungen am biologischen gewebe |
ATE544194T1 (de) * | 2005-10-14 | 2012-02-15 | Fractus Sa | Schlankes dreifachband-antennenarray für zellulare basisstationen |
EP2005522B1 (fr) | 2006-03-30 | 2015-09-09 | Intel Corporation | Antenne de station de base a double polarisation a large bande |
US8175532B2 (en) * | 2006-06-06 | 2012-05-08 | Qualcomm Incorporated | Apparatus and method for wireless communication via at least one of directional and omni-direction antennas |
WO2008126985A1 (fr) * | 2007-04-11 | 2008-10-23 | Electronics And Telecommunications Research Institute | Antenne multi-mode et procédé de régulation du mode de l'antenne |
US20090021437A1 (en) * | 2007-07-20 | 2009-01-22 | Senglee Foo | Center panel movable three-column array antenna for wireless network |
KR101202339B1 (ko) * | 2009-04-29 | 2012-11-16 | 한국전자통신연구원 | 메타물질 상판덮개를 이용한 이득향상과 빔 성형이 동시에 가능한 안테나 |
FR2945380B1 (fr) | 2009-05-11 | 2011-07-08 | Bouygues Telecom Sa | Antenne multifaisceaux compacte. |
FR2965411B1 (fr) * | 2010-09-29 | 2013-05-17 | Bouygues Telecom Sa | Antenne compacte a fort gain |
-
2009
- 2009-05-11 FR FR0953086A patent/FR2945380B1/fr active Active
-
2010
- 2010-05-11 WO PCT/EP2010/056416 patent/WO2010130714A1/fr active Application Filing
- 2010-05-11 US US13/319,992 patent/US8704727B2/en active Active
- 2010-05-11 EP EP10721757.2A patent/EP2430705B1/fr active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2010130714A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2945380A1 (fr) | 2010-11-12 |
US20120133559A1 (en) | 2012-05-31 |
EP2430705B1 (fr) | 2014-12-10 |
WO2010130714A1 (fr) | 2010-11-18 |
US8704727B2 (en) | 2014-04-22 |
FR2945380B1 (fr) | 2011-07-08 |
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