EP2976806A1 - Système multi-antennes large bande constitué d'au moins deux antennes de même forme et de même dimension - Google Patents
Système multi-antennes large bande constitué d'au moins deux antennes de même forme et de même dimensionInfo
- Publication number
- EP2976806A1 EP2976806A1 EP14711486.2A EP14711486A EP2976806A1 EP 2976806 A1 EP2976806 A1 EP 2976806A1 EP 14711486 A EP14711486 A EP 14711486A EP 2976806 A1 EP2976806 A1 EP 2976806A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna
- antennas
- ground plane
- antenna system
- distance
- 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
- 230000008878 coupling Effects 0.000 description 8
- 238000010168 coupling process Methods 0.000 description 8
- 238000005859 coupling reaction Methods 0.000 description 8
- 238000001228 spectrum Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- 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
Definitions
- Broadband multi-antenna system consisting of at least two antennas of the same shape and size.
- the present invention relates to a multi-antenna system broadband multi-antenna consisting of at least two antennas of the same shape and the same dimensions.
- the new 3GPP LTE telecommunication standard also known as 4G
- 4G opens a large number of sub-frequency bands in which telecommunication devices must transmit and / or receive signals.
- the sub-frequency bands are between 700MHz and 2700MHz.
- the frequency sub-band 700 to 800 MHz, the frequency sub-band 824 at 960 MHz, and the sub-frequency bands between 1710 MHz and 2700 MHz are examples.
- the antenna or antennas of the portable telecommunication devices must be able to transmit and / or receive electromagnetic signals in these sub-frequency bands.
- the lower sub-frequency bands impose antennae of large size while the miniaturization of portable telecommunications devices imposes imperatives of reduced size to the antennas.
- the present invention aims to solve these various constraints by providing a multi-antenna system that is able to radiate and / or convert electromagnetic waves in a broad frequency spectrum while being of reduced size.
- the invention proposes a broadband multi-antenna system consisting of at least two antennas of the same shape and dimensions, placed above a ground plane, characterized in that the antennas are respectively connected to a demodulator, the farthest portion of the ground plane of each antenna is folded one or more times so that the folded portion or the last folded portion of the antenna forms an angle with the unfolded portion of the antenna between 10 and 100 degrees.
- the multi-antenna system is able to radiate and / or convert electromagnetic waves in a broad frequency spectrum while being of a small footprint.
- the size of the multi-antenna system is reduced and the couplings between the antennas are reduced compared to multi-antenna broadband systems known to those skilled in the art.
- the dimensions of the ground plane on which the antennas are placed have little influence on the adaptation and radiation characteristics, that the ground plane is wider or thicker, or that the ground plane is laid or fixed on any substrate, for example against a wall, on the metal roof of a vehicle or on a table. wood.
- the dimensions of the ground plane will be reduced compared to the dimensions that should have the ground plane on which would be mounted a single antenna or several antennas designed with current existing solutions and within the reach of the skilled person.
- each antenna is folded once and the length of the folded part of the antenna represents between 25 and 40% of the total length of the antenna.
- the antenna directivity of the multi-antenna system is improved.
- a capacitive coupling between the folded portions of the antennas and the ground plane is obtained.
- the capacitive coupling obtained makes it possible to reduce the coupling existing between the different antennas and makes it possible to reduce the size of the multi-antenna system.
- each antenna is placed above the ground plane at the same distance from the ground plane and at the same distance from the center of the ground plane.
- the multi-antenna system comprises an even number of antennas, each antenna is symmetrical to another antenna according to a central symmetry, the center of the symmetry being a point above the plane of the antenna. mass at the same distance as the distance separating the antennas from the ground plane.
- the directivity of each of the antennas of the multi-antenna system compared to a system equipped with conventional antennas is improved, the coupling existing between the different antennas is reduced.
- each antenna is placed above the ground plane at a position such that the distance with its symmetrical antenna is the greatest.
- the multi-antenna system comprises an odd number of antennas comprising a first antenna and second antennas, the first antenna being placed at a point above the ground plane at the same distance from the plane. of mass that the distance of the antennas with the ground plane and each second antenna is the symmetrical of another second antenna in a central symmetry, the center of symmetry being the point at which the first antenna is placed.
- the directivity of the multi-antenna system is improved, the coupling existing between the different antennas is reduced.
- each second antenna is placed above the ground plane at a position such that the distance with its symmetrical antenna is the largest.
- the directivity of the multi-antenna system is improved, the coupling existing between the different antennas is reduced.
- the antennas have a circular, triangular, trapezoidal or elliptical shape and are placed above the ground plane at a distance of 1 to 4 mm from the ground plane.
- the shape is elliptical and the total length of the antenna is 70 mm.
- FIG. 1 represents an exemplary embodiment of a multi-antenna system which comprises an even number of antennas
- FIG. 2 shows a second embodiment of a multi-antenna system according to the present invention
- FIG. 2 shows a longitudinal section of two antennas symmetrical with respect to a point.
- FIG. 3 represents an exemplary embodiment of a multi-antenna system which comprises an odd number of antennas.
- Fig. 1 represents an exemplary embodiment of a multi-antenna system which comprises an even number of antennas.
- the multi-antenna system has four antennas.
- Antennas have the same shape and size.
- the antennas have an elliptical shape and are placed above the ground plane at a distance of 1 to 4, preferably 2 mm from the ground plane.
- the antennas have a circular, triangular, trapezoidal or elliptical shape.
- the antennas are respectively connected to a demodulator modulator represented by a sinusoid in a circle.
- the most distant part 10b, 11b, 12b and 13b of the ground plane of each antenna is folded once so that the folded part 10b, 11b, 12b and 13b of the antenna forms an angle with the unfolded part of the antenna between 10 and 100 degrees.
- the angle is equal to 90 degrees.
- the unfolded portion 10a, 11a, 12a and 13a is perpendicular to the ground plane.
- the length of the folded part of each antenna represents between 25 and 40% of the total length of the antenna which is for example 70 mm.
- the length of the folded part of each antenna represents 30% of the total length of the antenna.
- Each antenna is symmetrical to another antenna in a central symmetry, the center of symmetry being a point above the ground plane at the same distance as the distance separating the antennas from the ground plane.
- Each antenna is placed above the ground plane at a position such that the distance with its symmetrical antenna is greatest.
- the ground plane has four openings, only three noted 14, 15 and 16 are visible in FIG. 1.
- Each opening is symmetrical to another opening according to the same center of symmetry as that of the antennas.
- Fig. 2 shows a longitudinal section of two antennas symmetrical with respect to a point.
- Both antennas are folded three times. Of course, the antennas can be folded a larger number of times.
- the folds are denoted 21a, 21b and 21c for one of the antennas and noted 20a, 20b and 20c for the other antenna.
- Fig. 3 represents an exemplary embodiment of a multi-antenna system which comprises an odd number of antennas.
- the multi-antenna system has seven antennas.
- Antennas have the same shape and size.
- the antennas 30 to 36 have an elliptical shape and are placed above the ground plane at a distance of 1 to 4 mm from the ground plane.
- the antennas have a circular, triangular, trapezoidal or elliptical shape.
- the antennas are respectively connected to a demodulator modulator represented by a sinusoid in a circle.
- the antennas 30 to 36 are folded in the same manner as described with reference to FIG. 1.
- the antenna 36 is placed at a point above the ground plane at the same distance from the ground plane as the distance from the other antennas to the ground plane and each antenna 30 to 35 is the symmetrical of another antenna according to a central symmetry, the center of symmetry being the point at which the antenna 36 is placed.
- Each antenna 30 to 35 is placed above the ground plane at a position such that the distance with its symmetrical antenna is greatest.
- the antenna 36 is dedicated to communications in the frequency band reserved for Wif ⁇ or Zigbee or Bluetooth while the antennas 30 to 35 are dedicated to communications in the frequency bands reserved for the 2G, 3G cellular telecommunication standards.
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 |
---|---|---|---|
FR1352500A FR3003697B1 (fr) | 2013-03-20 | 2013-03-20 | Systeme multi-antennes large bande constitue d’au moins deux antennes de meme forme et de meme dimension. |
PCT/EP2014/055315 WO2014147030A1 (fr) | 2013-03-20 | 2014-03-17 | Système multi-antennes large bande constitué d'au moins deux antennes de même forme et de même dimension |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2976806A1 true EP2976806A1 (fr) | 2016-01-27 |
EP2976806B1 EP2976806B1 (fr) | 2019-12-25 |
EP2976806B8 EP2976806B8 (fr) | 2020-02-26 |
Family
ID=48856777
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14711486.2A Active EP2976806B8 (fr) | 2013-03-20 | 2014-03-17 | Système multi-antennes large bande constitué d'au moins deux antennes de même forme et de même dimension |
Country Status (4)
Country | Link |
---|---|
US (1) | US20160276740A1 (fr) |
EP (1) | EP2976806B8 (fr) |
FR (1) | FR3003697B1 (fr) |
WO (1) | WO2014147030A1 (fr) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE522054C2 (sv) * | 2002-07-08 | 2004-01-07 | Saab Ab | Elektriskt styrd bredbandig gruppantenn, antennelement lämpat att ingå i en sådan gruppantenn, samt antennmodul innefattande ett flertal sådana antennelement |
WO2004073112A1 (fr) * | 2003-02-14 | 2004-08-26 | Huber + Suhner Ag | Antenne monopolaire large bande |
US7760146B2 (en) * | 2005-03-24 | 2010-07-20 | Nokia Corporation | Internal digital TV antennas for hand-held telecommunications device |
US8354972B2 (en) * | 2007-06-06 | 2013-01-15 | Fractus, S.A. | Dual-polarized radiating element, dual-band dual-polarized antenna assembly and dual-polarized antenna array |
US8717250B2 (en) * | 2008-05-27 | 2014-05-06 | Mp Antenna Ltd | Enhanced band multiple polarization antenna assembly |
US8656579B2 (en) * | 2008-08-29 | 2014-02-25 | Motorola Mobility Llc | Method of forming a housing with integral antenna |
TWI450441B (zh) * | 2011-02-25 | 2014-08-21 | Acer Inc | 行動通訊裝置及其天線結構 |
US9385434B2 (en) * | 2013-03-14 | 2016-07-05 | MP Antenna Ltd. | MIMO antenna assembly having reduced packaging size |
-
2013
- 2013-03-20 FR FR1352500A patent/FR3003697B1/fr active Active
-
2014
- 2014-03-17 EP EP14711486.2A patent/EP2976806B8/fr active Active
- 2014-03-17 WO PCT/EP2014/055315 patent/WO2014147030A1/fr active Application Filing
- 2014-03-17 US US14/778,344 patent/US20160276740A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
EP2976806B8 (fr) | 2020-02-26 |
WO2014147030A1 (fr) | 2014-09-25 |
FR3003697A1 (fr) | 2014-09-26 |
US20160276740A1 (en) | 2016-09-22 |
FR3003697B1 (fr) | 2015-04-10 |
EP2976806B1 (fr) | 2019-12-25 |
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