EP1430566A1 - Antenne a large bande ou multi-bandes - Google Patents
Antenne a large bande ou multi-bandesInfo
- Publication number
- EP1430566A1 EP1430566A1 EP02781378A EP02781378A EP1430566A1 EP 1430566 A1 EP1430566 A1 EP 1430566A1 EP 02781378 A EP02781378 A EP 02781378A EP 02781378 A EP02781378 A EP 02781378A EP 1430566 A1 EP1430566 A1 EP 1430566A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reflector
- plane
- failing
- bip
- elements
- 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
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0086—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/06—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens
- H01Q19/062—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens for focusing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
Definitions
- Broadband or multi-band antenna Broadband or multi-band antenna.
- the invention relates to a broadband or multi-band antenna for microwaves, implemented from photonic band gap materials, designated BIP materials.
- BIP materials for the implementation of microwave antennas has already been proposed.
- Antennas of this type essentially comprise a reflective plane, a power outlet or radiating element in transmission / reception, placed in the vicinity of the reflective plane, and an assembly of '' at least two dielectric materials superimposed on the reflecting plane and on the power supply socket in transmission / reception.
- the dielectric materials used are differentiated by their permittivity or their permeability, the assembly thus formed constituting a BIP material.
- a BIP material is a material which has the property of filtering (absorbing) certain frequency ranges, that is to say of prohibiting any transmission in the aforementioned frequency ranges .
- the material is, under these conditions, qualified BIP material, with Photonic Forbidden Band.
- the BIP material generally consists, as shown in FIG. 1b, of a periodic arrangement of dielectrics of variable permittivity and / or permeability.
- BIP material is, under these conditions, designated BIP material in default.
- Such a type of antenna is satisfactory. However, due to the very structure of the latter, the bandwidth authorized by such an antenna type is relatively narrow and does not exceed 4 to 5% of the central frequency, for an attenuation of 6dB.
- the object of the present invention is to remedy the aforementioned drawbacks and limitations of antennas with BIP material, failing this in the prior art.
- an object of the present invention is the implementation of a broadband antenna, of the type with default BIP material, having a significantly improved passband or divided into multiple passbands.
- Another object of the present invention is, in addition, the implementation of a broadband antenna, having a simple structure, in the absence of the addition of a dispersive or absorbent element by breaking the regularity or by making the more complex implementation.
- the broadband antenna, object of the present invention is remarkable in that it comprises at least one plane, constituting a reflector, and at least one outlet for transmission / reception supply placed in the vicinity of this plane constituting a reflector.
- an assembly of elements of defective BIP material disposed substantially in superposition on the plane constituting the reflector and on the power outlet is provided.
- Each element of defective BIP material forming the assembly is substantially plane and parallel to the plane constituting the reflector and at least one of the characteristics of dielectric permittivity, magnetic permeability and / or thickness in the direction perpendicular to the plane constituting the reflector.
- these elements is substantially different from one element of failing BIP material to another, so that the assembly formed by the plane constituting a reflector and the assembly of elements of failing BIP material forms a resonant cavity with leaks.
- the broadband antenna object of the present invention, finds application, in particular, in the production of microwave antennas usable in the field of mobile radiotelephony, telecommunications by optical means in the field of visible or invisible spectrum.
- FIG. 2a shows, by way of illustration, a perspective view of a broadband or multi-band antenna according to the subject of the present invention
- FIG. 2b shows a sectional view, along the section plane P of the broadband or multi-band antenna, object of the invention, shown in Figure 2a;
- FIG. 3a shows, by way of illustration, a sectional view, along the same section plane P shown in Figure 2a, of an antenna equivalent to that shown in Figure 2a or 2b;
- FIG. 3b shows a comparative diagram of the transmission coefficients as a function of the frequency of an antenna of the prior art illustrated by the aforementioned French patent application 2 801 428, curve A, respectively of an antenna conforming to the object of the present invention as shown in Figure 2a, 2b or 3a, curve B;
- FIG. 4 shows, by way of illustration, a diagram of the waveforms generated in the resonant leakage cavity constituting the broadband or multi-band antenna, object of the present invention in its two modes of implementation , according to Figures 2a, 2b and 3a;
- FIG. 5 shows an antenna array implemented from an antenna according to the invention.
- FIGS. 2a-2b A more detailed description of a broadband or multiband antenna, in accordance with the object of the present invention, will now be given in conjunction with FIGS. 2a-2b and the following figures.
- the broadband antenna object of the present invention, comprises at least one plane constituting a reflector, denoted R, this plane possibly being constituted by a metal plate for example.
- the radiating element ER in transmission / reception noted ER is provided.
- the radiating element ER can be constituted by a radiating dipole, a radiating slot, a probe or a radiating patch for example. While in the embodiment as shown in Figure 2a a single radiating element ER is shown, it is indicated that the broadband antenna, object of the present invention, may comprise a plurality of radiating elements ER not shown in the drawing.
- the broadband or multi-band antenna, object of the invention comprises, arranged superimposed on the plane constituting the reflector R and on this or these radiating elements ER, an assembly BIP material elements failing.
- assembly BIP material elements failing this, is meant a plurality of elements constituted by blades or structures of dielectric material for example, denoted LD, these elements, forming groups or patterns, being stacked in the direction perpendicular to the plane reflector R and separated, each by another dielectric material, for example, by an air space, alumina or the like.
- Each strip of dielectric material LD is substantially planar, and each element of failing BIP material is parallel to the plane constituting the reflector R.
- at least one of the characteristics of magnetic permeability, dielectric permittivity and / or thickness, denoted e, in the direction perpendicular to the plane constituting the reflector R is substantially different, from an element of BIP material failing to the other.
- each plate of dielectric material LD can have a value of dielectric permittivity, magnetic permeability or a different thickness e, of an element of BIP material failing this. to the other, under the conditions which will be explained below in the description.
- 2b shows a sectional view along the section plane P of Figure 2a of the broadband antenna, object of the invention, shown in the above figure.
- ⁇ ' g the wavelength of the radio signal guided when the propagation medium consists of the material, such as a dielectric material, of each of the blades LD respectively by ⁇ g the length of wave of the radio signal guided by the intervals separating the LD blades and the elements of failing BIP material, that is to say in a nonlimiting embodiment by the air or alumina blades separating the LD blades represented in Figure 2a and in Figure 2b.
- the notation ⁇ g also designates the wavelength of the guided radio signal propagating between the plane forming a reflector R and the first strip of dielectric material LD placed opposite the latter.
- FIG. 2b an orthonormal reference has been shown in particular making it possible to identify all of the constituent elements of the broadband antenna which is the subject of the present invention.
- the reflective plane R is at dimension 0 in the direction Oz
- the blades LD being superposed successively in the aforementioned direction
- the cutting plane P is parallel to the plane Ox, Oz.
- the direction Oy is orthogonal to the plane Ox, Oz mentioned above.
- FIG. 2b A particular non-limiting mode of implementation of the broadband antenna which is the subject of the present invention will now be described in connection with FIG. 2b in a particularly simple and simplified case where the assembly of elements in BIP material failing this and the blades of LD material consist of blades of the same dielectric material for example, which, under these conditions, have characteristics of dielectric permittivity respectively of magnetic permeability substantially identical from one blade of dielectric material to another and of one element in BIP material failing the other.
- each strip of dielectric material LD advantageously has a thickness constituting a non-decreasing function by discrete values of the distance of the strip of dielectric material considered from the plane constituting the reflector R.
- each strip of dielectric material forming the assembly is spaced from a neighboring dielectric strip by the same distance equal to ⁇ g / 4 where ⁇ g denotes the guided wavelength associated with the separating material each blade of LD dielectric material.
- ⁇ g denotes the guided wavelength associated with the air or with the alumina separating each plate of dielectric material LD.
- the first strip of dielectric material LD facing the plane constituting the reflector R and adjacent to this plane is placed at a distance from this plane equal to ⁇ g / 2, ⁇ g denoting in the same way the guided wavelength associated with the material separating the first strip of dielectric material LD from the plane constituting the reflector R.
- ⁇ g thus denotes the length of guided wave of the radio signal when the latter is propagated in air or alumina in the example of nonlimiting implementation corresponding to FIG. 2a or 2b.
- a plurality of blades of successive dielectric material LD present the same thickness, this thickness being substantially equal to a fraction of the guided wavelength associated with this dielectric material to form a group of successive dielectric material blades.
- the resonant cavity thus appears to be constituted by a plurality of groups of blades of successive dielectric material each formed by an element of defective BIP material, the different groups being mutually coupled by their fault zone to constitute the resonant cavity with resulting leakage.
- ⁇ ' g denotes the wavelength of the guided radio signal propagating in each plate of dielectric material LD.
- each group by way of nonlimiting example, being constituted by two parallel blades of the same thickness, respectively ei and e 2 .
- the thickness ⁇ j of the blades of dielectric material LD constituting each group Gj of blades of dielectric material is in geometric progression by reason q in the direction of superposition of the successive groups Gj.
- the number of superimposed groupings is equal to 2, so as not to overload the drawing, and the reason for the geometric progression is also taken equal to 2. These values are not limiting .
- the assembly of the elements of failing BIP material can be formed by a periodic repeating structure of the characteristics of magnetic permeability, dielectric permittivity and thickness of the material blades in one, two or three directions, a perpendicular direction and one or two directions parallel to the plane constituting the reflector, as will be described below in the description.
- the superposition of the groups Gj constitutes a repetition of patterns of characteristics of magnetic permeability, of dielectric permittivity and of different thickness, this repetition being able to be periodic.
- the structure of the broadband or multi-band antenna in accordance with the subject of the present invention is implemented on the basis of the preliminary remark according to which the amplitude of the electric field in the vicinity of the plane constituting the reflector R is substantially zero due to the principle of metallic reflection of the electric fields in the vicinity of the surface of a metallic reflector. Consequently, as shown in FIG.
- the structure of the broadband or multi-band antenna, in accordance with the object of the present invention is obtained by eliminating the plane constituting the reflector R and by replacing the latter with another assembly of elements of BIP material with symmetrical defect, the blades of dielectric material constituting the other assembly of elements of BIP material with symmetrical defect, due to the aforementioned symmetry, being denoted LD S in FIG. 3a.
- Symmetry is understood, of course, with respect to the radiating element ER or with respect to all of the radiating elements ER in transmission / reception and with respect to the median plane materializing the location of the plane constituting the removed reflector R.
- the groups of the other assembly of blades of dielectric material LD S are designated G- ⁇ s , respectively G 2s with reference to FIG. 2b.
- FIG. 3b represents a diagram of the transmission coefficients expressed in dB as a function of the frequency for a broadband antenna conforming to the object of the present invention as represented in FIG. 2a, 2b or 3a, curve B, in comparison with FIG. an antenna of the prior art as described in the French patent application previously cited in the description, curve A. From the comparison of the above-mentioned curves, there is a significant increase in the bandwidth when the antenna structure in accordance with the object of the present invention is implemented.
- the bandwidth when the broadband antenna structure conforms to the object of the present invention is implemented, is at least twice as large as the bandwidth corresponding to the same frequency and for an attenuation value of 6dB, when an antenna structure of conventional type is used implemented.
- FIG. 4 finally shows the waveforms obtained during the implementation of a broadband antenna in accordance with the object of the present invention, for example in the case of FIG. 3a, the aforementioned waveforms being represented by the amplitude of the electric field
- the broadband or multi-band antenna structure described in accordance with the object of the present invention in the present description is not limited to the embodiment described in connection with the Figures 2a, 2b and 3a for example. Indeed, while these structures have a repeating direction of a single pattern, as shown in FIGS. 2b or 3a for example, in the direction Oz, it is of course possible to provide two repeating directions and even three repeating directions in the directions Oy and Ox of the reference shown in FIG. 2b, 3a and 4 for example.
- the elements of BIP material, failing this, constituting the superimposed groupings or patterns may include blades or elements of metal or of magnetic material for example.
- the orthonormal coordinate system is designated Oxyz, Ozxy, Oyzx to take account of the production of repeating patterns in one, in two or in three directions.
- the antenna structure in accordance with the object of the present invention makes it possible to implement an antenna array.
- the antenna array obtained comprises an antenna conforming to the object of the invention as described previously in the description in which a plurality of elements in transmission / reception ERj ; k are distributed periodically at neighborhood of the reflector plane R.
- the radiating elements ERj; k can be identical.
- the dimensioning of the network and the number J, K of radiating elements in the two directions of distribution of the latter are chosen according to the application or the use of the network.
- Such networks find application in point-to-point and point-to-point telecommunications.
- a new broadband or multiband antenna structure has thus been described, which has particularly advantageous properties in terms of bandwidth while retaining the radiation and bulk properties of the antenna structure of the prior art, as previously mentioned.
- the broadband or multi-band antenna structure which is the subject of the present invention forms a leakage cavity, the operating frequency of which is mainly fixed by the superimposition dimension of the arrangement of elements of BIP material, failing this. .
- the results obtained have shown a doubling of the bandwidth compared to the device of the prior art described above.
- the broadband or multi-band antenna structure in accordance with the object of the present invention makes it possible to remove one of the limits of use of BIP materials for the production of radiating devices.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Aerials With Secondary Devices (AREA)
- Details Of Aerials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0112279 | 2001-09-24 | ||
FR0112279A FR2830131B1 (fr) | 2001-09-24 | 2001-09-24 | Antenne a large bande ou multi-bandes |
PCT/FR2002/003190 WO2003028157A1 (fr) | 2001-09-24 | 2002-09-18 | Antenne a large bande ou multi-bandes |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1430566A1 true EP1430566A1 (fr) | 2004-06-23 |
EP1430566B1 EP1430566B1 (fr) | 2018-01-10 |
Family
ID=8867557
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02781378.1A Expired - Lifetime EP1430566B1 (fr) | 2001-09-24 | 2002-09-18 | Antenne a large bande ou multi-bandes |
Country Status (7)
Country | Link |
---|---|
US (1) | US6975269B2 (fr) |
EP (1) | EP1430566B1 (fr) |
JP (1) | JP3987494B2 (fr) |
CN (1) | CN100346534C (fr) |
CA (1) | CA2460820C (fr) |
FR (1) | FR2830131B1 (fr) |
WO (1) | WO2003028157A1 (fr) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1554777B1 (fr) * | 2002-10-24 | 2006-05-03 | Centre National de la Recherche Scientifique - CNRS | Antenne a materiau bip multi-faisceaux |
US7411564B2 (en) * | 2002-10-24 | 2008-08-12 | Centre National De La Recherche Scientifique (C.N.R.S.) | Frequency multiband antenna with photonic bandgap material |
FR2906410B1 (fr) * | 2006-09-25 | 2008-12-05 | Cnes Epic | Antenne a materiau bip(bande interdite photonique), systeme et procede utilisant cette antenne |
FR2914506B1 (fr) * | 2007-03-29 | 2010-09-17 | Centre Nat Rech Scient | Antenne a resonateur equipe d'un revetement filtrant et systeme incorporant cette antenne. |
US20100134876A1 (en) * | 2008-07-10 | 2010-06-03 | Michael Fiddy | Wireless signal proximity enhancer |
RU2484559C2 (ru) * | 2010-06-08 | 2013-06-10 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Национальный исследовательский университет "Высшая школа экономики" | Печатная плата с подвешенной подложкой |
WO2012153164A1 (fr) | 2011-05-06 | 2012-11-15 | Time Reversal Communications | Dispositif pour la réception et/ou l'émission d'une onde, système comprenant le dispositif, et utilisation d'un tel dispositif |
GB201122324D0 (en) | 2011-12-23 | 2012-02-01 | Univ Edinburgh | Antenna element & antenna device comprising such elements |
US20160294068A1 (en) * | 2015-03-30 | 2016-10-06 | Huawei Technologies Canada Co., Ltd. | Dielectric Resonator Antenna Element |
CN106646868B (zh) * | 2017-01-18 | 2022-07-22 | 河南师范大学 | 一种磁场均匀增强的近场光学天线 |
KR102346283B1 (ko) * | 2018-02-02 | 2022-01-04 | 삼성전자 주식회사 | 반사체를 포함하는 안테나 모듈 및 이를 포함하는 전자장치 |
CN108461924B (zh) * | 2018-03-15 | 2024-03-08 | 深圳市维力谷无线技术股份有限公司 | 一种卫星双频天线 |
EP3700005A1 (fr) | 2019-02-25 | 2020-08-26 | Nokia Solutions and Networks Oy | Transmission et/ou réception de signaux de radiofréquence |
JP7193805B2 (ja) * | 2019-09-03 | 2022-12-21 | 日本電信電話株式会社 | アンテナシステム |
CN112684259B (zh) * | 2020-12-04 | 2022-04-22 | 西南大学 | 一种用于测量磁介质材料介电常数和磁导率的重入式腔体传感器 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4827271A (en) * | 1986-11-24 | 1989-05-02 | Mcdonnell Douglas Corporation | Dual frequency microstrip patch antenna with improved feed and increased bandwidth |
US5153600A (en) * | 1991-07-01 | 1992-10-06 | Ball Corporation | Multiple-frequency stacked microstrip antenna |
FR2706085B1 (fr) * | 1993-06-03 | 1995-07-07 | Alcatel Espace | Structure rayonnante multicouches à directivité variable. |
US5745080A (en) * | 1994-09-06 | 1998-04-28 | L.G. Electronics Inc. | Flat antenna structure |
US6384785B1 (en) * | 1995-05-29 | 2002-05-07 | Nippon Telegraph And Telephone Corporation | Heterogeneous multi-lamination microstrip antenna |
US5739796A (en) * | 1995-10-30 | 1998-04-14 | The United States Of America As Represented By The Secretary Of The Army | Ultra-wideband photonic band gap crystal having selectable and controllable bad gaps and methods for achieving photonic band gaps |
DE19607934C1 (de) * | 1996-03-01 | 1997-07-10 | Daimler Benz Aerospace Ag | Reflektor |
FR2801428B1 (fr) * | 1999-11-18 | 2004-10-15 | Centre Nat Rech Scient | Antenne pourvue d'un assemblage de materiaux filtrant |
-
2001
- 2001-09-24 FR FR0112279A patent/FR2830131B1/fr not_active Expired - Fee Related
-
2002
- 2002-09-18 WO PCT/FR2002/003190 patent/WO2003028157A1/fr active Application Filing
- 2002-09-18 EP EP02781378.1A patent/EP1430566B1/fr not_active Expired - Lifetime
- 2002-09-18 JP JP2003531562A patent/JP3987494B2/ja not_active Expired - Fee Related
- 2002-09-18 CN CNB028186435A patent/CN100346534C/zh not_active Expired - Fee Related
- 2002-09-18 US US10/488,493 patent/US6975269B2/en not_active Expired - Lifetime
- 2002-09-18 CA CA002460820A patent/CA2460820C/fr not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO03028157A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2830131B1 (fr) | 2005-06-24 |
CN100346534C (zh) | 2007-10-31 |
WO2003028157A1 (fr) | 2003-04-03 |
CN1557038A (zh) | 2004-12-22 |
US6975269B2 (en) | 2005-12-13 |
CA2460820A1 (fr) | 2003-04-03 |
US20040189529A1 (en) | 2004-09-30 |
JP3987494B2 (ja) | 2007-10-10 |
FR2830131A1 (fr) | 2003-03-28 |
CA2460820C (fr) | 2010-01-12 |
EP1430566B1 (fr) | 2018-01-10 |
JP2005504475A (ja) | 2005-02-10 |
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