EP2079131A1 - Perfektionierung für Planar-Antennen, die mindestens ein Strahlungselement vom Typ Schlitzantenne mit Längsstrahler umfasst - Google Patents

Perfektionierung für Planar-Antennen, die mindestens ein Strahlungselement vom Typ Schlitzantenne mit Längsstrahler umfasst Download PDF

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Publication number
EP2079131A1
EP2079131A1 EP08171858A EP08171858A EP2079131A1 EP 2079131 A1 EP2079131 A1 EP 2079131A1 EP 08171858 A EP08171858 A EP 08171858A EP 08171858 A EP08171858 A EP 08171858A EP 2079131 A1 EP2079131 A1 EP 2079131A1
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EP
European Patent Office
Prior art keywords
antenna
length
radiating
plane
radiation pattern
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.)
Withdrawn
Application number
EP08171858A
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English (en)
French (fr)
Inventor
Julian Thevenard
Dominique Lo Hing Tong
Ali Louzir
Corinne Nicolas
Jean-Philippe Coupez
Christian Person
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THOMSON LICENSING
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Thomson Licensing SAS
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Publication date
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Publication of EP2079131A1 publication Critical patent/EP2079131A1/de
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
    • H01Q13/085—Slot-line radiating ends
    • 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

Definitions

  • the present invention relates to an improvement to planar antennas, more particularly to antennas comprising at least one radiating element consisting of a longitudinal radiation slot.
  • antennas represent an exception to this possibility of miniaturization. Indeed, they are subject to the laws of physics which impose a minimum size for operation at a given frequency. Thus, in the case of printed planar antennas, the dimensions are of the order of the wavelength at the central operating frequency.
  • the printed planar structures are perfectly adapted structures for mass production of devices integrating passive and active functions.
  • a planar structure does not allow a complete control of the radiation of the antenna, especially in elevation.
  • the directivity and the angular aperture of the main lobe of the radiation pattern of the antenna are directly related to the dimensions of the antenna which must be increased to obtain a high directivity and a large aperture of the antenna. main lobe.
  • the present invention therefore proposes an antenna structure in which the radiation pattern of the antenna can be modified and optimized without modifying the physical dimensions of the antenna structure.
  • the present invention relates to a structure for a slot-type antenna comprising on a substrate at least one element beam comprising a longitudinal radiation slot and a feed line, said substrate being surrounded by a radome, characterized in that at least one radiation pattern modifying element is positioned on the radome in the radiation zone of the radiating element.
  • This modifying element of the radiation pattern is constituted by a conductive element positioned in a plane extending the plane of the substrate or plane E.
  • This conductive element may be positioned perpendicularly to the axis of symmetry of the radiating element or offset angularly relative to to this axis of symmetry or with respect to an axis perpendicular to this axis of symmetry.
  • another element for modifying the radiation pattern is constituted by a conductive element positioned in a plane perpendicular to the plane of the substrate or plane H.
  • These conductive elements may be combined with one another and have a protruding protrusion on the adaptation parameters of the radiating element.
  • the conductive element is constituted by a rod or a metal strip.
  • the antenna structure consists of N (N> 1) radiating elements formed on N substrates interconnected along a common axis perpendicular to the radiating axis of each radiating element, each radiating element being associated with at least one modifying element of the radiation pattern positioned in the radiation region of the radiating element, as mentioned above.
  • the present invention will be described by taking as a radiating element consisting of a longitudinal radiation slot, an antenna type LTSA (Linearly Tapered Slot Antenna in English) such as a Vivaldi antenna. It is obvious that the invention can be applied to other types of longitudinal radiation antennas.
  • LTSA Linearly Tapered Slot Antenna in English
  • an antenna of this type is obtained by etching on a substrate 1, a slot 3 which widens progressively to an edge 1 'of the substrate.
  • a microstrip line 4 for excitation by electromagnetic coupling of said slot.
  • Other types of power supply can be envisaged without departing from the scope of the present invention, especially a power supply coplanar line.
  • a metal rod 6 is positioned perpendicular to the axis of symmetry of the slot portion 3 of the antenna, namely the axis Ox in the embodiment shown.
  • the figure 3 represents a Vivaldi type antenna similar to the antenna of the figure 1 associated with a vertical element 6 made in the plane of the substrate, namely the plane E of the antenna.
  • this vertical element is not produced on the substrate 1, but in a radiation plane of the Vivaldi antenna, extending the plane of the substrate.
  • the vertical element or elements may be positioned on an element surrounding the antenna such as a radome.
  • An antenna of this type has been simulated using elements 6 of different lengths.
  • the curves A represent an antenna of the Vivaldi type alone.
  • the curves B represent a Vivaldi antenna in the presence of an element 6 having a length of 30 mm, namely a length greater than ⁇ / 2, and the curve C, an antenna in the presence of an element 6 of length 20. mm, namely a length less than ⁇ / 2 where ⁇ is the wavelength at the operating frequency of the antenna.
  • FIG. figure 7 (curve C '), the curve D' giving the results obtained with an antenna in the presence of a director element of length 20 mm positioned in the plane E, as shown in FIG. figure 3 .
  • the offset of the main beam B 'when the steering element is shifted up or down, is confirmed mainly by the diagram of the figure 9 where the curves A 'and C' are on each side of the curve B '.
  • an element for modifying the radiation parameters is constituted by a rod or conductive strip 7, more particularly a rod or metal strip, positioned along the plane H, namely perpendicularly to the plane of the substrate of the antenna.
  • the simulations carried out yielded curves of adaptation as a function of the frequency represented in FIG. figure 14 and a radiation pattern in the azimuthal plane and in the elevation plane shown in Figures 15 and 16 .
  • the simulations were carried out with an element 7 of width 1 mm and length 25 mm, the parameters of the antenna being identical to those mentioned above.
  • Curve D represents the antenna without modifying element while curve E represents an antenna structure in the presence of a horizontal modification element.
  • a protrusion 8a more particularly a disc is inserted in the middle of the vertical metal arm 8.
  • the protrusion may have another shape such as a square or polygonal shape. This element modifies the electromagnetic environment close to the opening of the radiating element and makes it possible to widen the bandwidth to -10 dB, as shown in FIG. figure 18 .
  • the Figures 21 to 24 represent respectively for Figures 21 and 22 , two other embodiments of the modification element of the radiation pattern and the Figures 23 and 24 respectively, the azimuthal radiation pattern and the elevation plane radiation pattern of the two embodiments above.
  • the modifying element 9 consists respectively of a vertical conductive element 9A and a horizontal conductive element 9B while on the figure 22 , the modification element of the radiation pattern 10 consists of a vertical arm 10A, a horizontal arm 10B and an outgrowth formed by a circle 10C.
  • Diagrams of Figures 23 and 24 highlight the improvement of the front-to-back ratio in the case of an element similar to that of figure 22 .
  • the radiation pattern of the figure 25 and the curve of adaptation of the figure 26 show the advantages of an antenna structure provided with a modification element of the radiation pattern as shown in FIG. figure 22 (curve J), compared to a single antenna (curve L).
  • the embodiment of the figure 22 allows to obtain a similar adaptation to that of a single antenna while improving the gain of the antenna and the direction of the main beam, without changing the physical dimensions of the radiating element itself.
  • the figure 27 represents an antenna structure comprising a single radiating element 1 of the type described above, this radiating element being surrounded by a radome formed of an outer cylindrical envelope 20A and an inner cylindrical envelope 20B.
  • two vertical guide elements are positioned according to the plane E of the radiating element.
  • These guiding elements 30A and 30B consist of metal strips made directly on the radome using a plastic metallization technique.
  • an antenna structure 100 with four radiating elements, these four elements being interconnected along a common vertical axis.
  • the structure of two 100A and 100B radiating elements is represented more clearly on the figure 29 .
  • the four elements are mounted on a horizontal support 101 and covered with a radome 110, formed of an outer envelope 110A and an inner envelope 110B.
  • vertical metal guide elements 111 A and 111 B are etched on the outer portion 110A and on the inner portion 110B of the radome in the plane E of each radiating element 100A, 100B.
  • the present invention also applies to antenna structures protected by multilayer radomes with at least one modification element of the radiation pattern etched on each of the layers.
  • the electrical length of the modifying elements of the radiation pattern can be modified by activating / deactivating switching elements such as diodes or MEMs placed between the elements for example. It is also possible to provide switching elements interconnecting several modification elements with each other. Depending on whether switching elements are on or off, it is possible to modify the structure of the modification element network.

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  • Aerials With Secondary Devices (AREA)
EP08171858A 2008-01-11 2008-12-16 Perfektionierung für Planar-Antennen, die mindestens ein Strahlungselement vom Typ Schlitzantenne mit Längsstrahler umfasst Withdrawn EP2079131A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0850173A FR2926402A1 (fr) 2008-01-11 2008-01-11 Perfectionnement aux antennes planaires comportant au moins un element rayonnant de type fente a rayonnement longitudinal

Publications (1)

Publication Number Publication Date
EP2079131A1 true EP2079131A1 (de) 2009-07-15

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EP08171858A Withdrawn EP2079131A1 (de) 2008-01-11 2008-12-16 Perfektionierung für Planar-Antennen, die mindestens ein Strahlungselement vom Typ Schlitzantenne mit Längsstrahler umfasst

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EP (1) EP2079131A1 (de)
FR (1) FR2926402A1 (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102361169A (zh) * 2011-10-20 2012-02-22 东南大学 异面延迟线电阻加载对跖维瓦尔第脉冲天线
CN102361159A (zh) * 2011-10-20 2012-02-22 东南大学 树形接入异面延迟线电阻加载对跖维瓦尔第脉冲天线
CN102394355A (zh) * 2011-10-20 2012-03-28 东南大学 延迟线电阻加载对跖维瓦尔第脉冲天线
CN102509871A (zh) * 2011-10-20 2012-06-20 东南大学 微带侧边馈电对跖维瓦尔第天线
CN103635419A (zh) * 2011-05-03 2014-03-12 雷蒙特亚特特拉维夫大学有限公司 天线系统及其用途
CN107317101A (zh) * 2017-05-23 2017-11-03 南京邮电大学 一种基于寄生贴片加载技术的对踵Vivaldi天线
CN108461910A (zh) * 2018-04-27 2018-08-28 广东曼克维通信科技有限公司 加载天线
CN109301451A (zh) * 2018-08-30 2019-02-01 南京理工大学 一种宽带高增益Vivaldi天线
CN109449589A (zh) * 2018-12-17 2019-03-08 西安电子工程研究所 具有宽带宽扫特性的两维有源相控阵天线单元
CN111276804A (zh) * 2020-02-11 2020-06-12 东南大学 一种基于数字编码超宽带天线阵及其高精度双波束扫描方法
CN113571890A (zh) * 2021-07-26 2021-10-29 中国人民解放军63660部队 一种具有L型槽线的共面Vivaldi天线

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0791977A2 (de) * 1996-02-20 1997-08-27 Matsushita Electric Industrial Co., Ltd Mobile Funkantenne
DE202004008770U1 (de) * 2004-06-03 2004-08-12 Kathrein-Werke Kg Dualpolarisierte Antenne
US20050062673A1 (en) * 2003-09-19 2005-03-24 National Taiwan University Of Science And Technology Method and apparatus for improving antenna radiation patterns
US20060061513A1 (en) * 2004-09-21 2006-03-23 Fujitsu Limited Planar antenna and radio apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0791977A2 (de) * 1996-02-20 1997-08-27 Matsushita Electric Industrial Co., Ltd Mobile Funkantenne
US20050062673A1 (en) * 2003-09-19 2005-03-24 National Taiwan University Of Science And Technology Method and apparatus for improving antenna radiation patterns
DE202004008770U1 (de) * 2004-06-03 2004-08-12 Kathrein-Werke Kg Dualpolarisierte Antenne
US20060061513A1 (en) * 2004-09-21 2006-03-23 Fujitsu Limited Planar antenna and radio apparatus

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
ARAI H ET AL: "Bi-directional notch antenna with parasitic elements for tunnel booster system", ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM, 1997. IEEE., 1997 DIGEST MONTREAL, QUE., CANADA 13-18 JULY 1997, NEW YORK, NY, USA,IEEE, US, vol. 4, 13 July 1997 (1997-07-13), pages 2218 - 2221, XP010246648, ISBN: 978-0-7803-4178-4 *
KUGA N ET AL: "A bi-directional pattern antenna using short-tapered slot antenna", IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM. 2001 DIGEST. APS. BOSTON, MA, JULY 8 - 13, 2001; [IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM], NEW YORK, NY : IEEE, US, vol. 3, 8 July 2001 (2001-07-08), pages 460 - 463, XP010564325, ISBN: 978-0-7803-7070-8 *
TAN-HUAT CHIO ET AL: "Parameter Study and Design of Wide-Band Widescan Dual-Polarized Tapered Slot Antenna Arrays", IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 48, no. 6, 1 June 2000 (2000-06-01), XP011003798, ISSN: 0018-926X *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103635419A (zh) * 2011-05-03 2014-03-12 雷蒙特亚特特拉维夫大学有限公司 天线系统及其用途
CN102394355B (zh) * 2011-10-20 2015-01-28 东南大学 延迟线电阻加载对跖维瓦尔第脉冲天线
CN102394355A (zh) * 2011-10-20 2012-03-28 东南大学 延迟线电阻加载对跖维瓦尔第脉冲天线
CN102509871A (zh) * 2011-10-20 2012-06-20 东南大学 微带侧边馈电对跖维瓦尔第天线
CN102361159B (zh) * 2011-10-20 2014-01-01 东南大学 树形接入异面延迟线电阻加载对跖维瓦尔第脉冲天线
CN102361159A (zh) * 2011-10-20 2012-02-22 东南大学 树形接入异面延迟线电阻加载对跖维瓦尔第脉冲天线
CN102361169A (zh) * 2011-10-20 2012-02-22 东南大学 异面延迟线电阻加载对跖维瓦尔第脉冲天线
CN107317101A (zh) * 2017-05-23 2017-11-03 南京邮电大学 一种基于寄生贴片加载技术的对踵Vivaldi天线
CN108461910A (zh) * 2018-04-27 2018-08-28 广东曼克维通信科技有限公司 加载天线
CN109301451A (zh) * 2018-08-30 2019-02-01 南京理工大学 一种宽带高增益Vivaldi天线
CN109449589A (zh) * 2018-12-17 2019-03-08 西安电子工程研究所 具有宽带宽扫特性的两维有源相控阵天线单元
CN109449589B (zh) * 2018-12-17 2023-12-29 西安电子工程研究所 具有宽带宽扫特性的两维有源相控阵天线单元
CN111276804A (zh) * 2020-02-11 2020-06-12 东南大学 一种基于数字编码超宽带天线阵及其高精度双波束扫描方法
CN113571890A (zh) * 2021-07-26 2021-10-29 中国人民解放军63660部队 一种具有L型槽线的共面Vivaldi天线

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Publication number Publication date
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