EP3454414B1 - Antenne polarisée linéairement double extra-plate à large bande pour plateforme lte deux en une - Google Patents

Antenne polarisée linéairement double extra-plate à large bande pour plateforme lte deux en une Download PDF

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Publication number
EP3454414B1
EP3454414B1 EP18193154.4A EP18193154A EP3454414B1 EP 3454414 B1 EP3454414 B1 EP 3454414B1 EP 18193154 A EP18193154 A EP 18193154A EP 3454414 B1 EP3454414 B1 EP 3454414B1
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European Patent Office
Prior art keywords
linearly polarized
dual
broadband low
polarized antenna
profile
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EP18193154.4A
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German (de)
English (en)
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EP3454414A1 (fr
Inventor
Hong Xia XIAO
Chang Ming Ma
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PCTel Inc
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PCTel Inc
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    • 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
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/378—Combination of fed elements with parasitic elements
    • H01Q5/385—Two or more parasitic elements
    • 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
    • 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
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • 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
    • H01Q21/26—Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
    • 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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength

Definitions

  • the present application generally relates to a broadband low-profile dual-linearly polarized antenna and, more specifically, to a broadband low-profile dual-linearly polarized antenna for a OneLTE two-in-one platform.
  • OneLTE technology is rapidly emerging.
  • OneLTE refers to simultaneously comprising both TD-LTE and LTE FDD wireless network access modes and a shared core network in an LTE network.
  • the two wireless network access modes complement each other and cooperate with each other to achieve site-level convergence, network interoperability, and performance level integration on a network side, thereby maximizing overall network capacity and coverage.
  • Operators can, thus, use all of their own spectrum, including TDD and FDD, to provide a unified 4G network experience.
  • existing dual-linearly polarized antennas for OneLTE typically include two radiating portions (i.e., 1.8 GHz for FDD and 2.6 GHz for TDD) because neither has sufficient bandwidth.
  • the dual-linearly polarized antenna disclosed by the U.S. Patent No. 3,740,754 the first of its kind to describe a dual-linearly polarized antenna, just cannot meet the needs of a wide frequency band. Therefore, such antennas for OneLTE are bulky and do not meet requirements for miniaturization.
  • there is a fairly obvious mutual coupling between the high and low frequency radiating portions causing distortion of the radiation pattern of the radiating portions of the different frequency bands.
  • WO2016/133244A1 discloses a multi-band radiating element comprising: a first high frequency radiating element formed on the upper surface of a substrate; one or more first low frequency parasitic elements formed on the upper surface of the substrate and formed at a predetermined distance from the first high frequency radiating element in the direction of the outer edge of the substrate; one or more second low frequency parasitic elements formed on the upper surface of the substrate and formed at a predetermined distance from the first high frequency radiating element in the direction of the outer edge of the substrate; a second high frequency radiating element formed on the bottom surface of the substrate; and a reflector formed at a predetermined distance from the bottom surface of the substrate.
  • a broadband low-profile dual-linearly polarized antenna according to claim 1 is provided.
  • a broadband low-profile dual-linearly polarized antenna array device can include (1) a plurality of the above-described dual-linearly polarized antennas, (2) a feed network that can include a power divider for feeding the plurality of dual-linearly polarized antennas in equal amplitude and in same phase, wherein the feed network can include two feed ports for respectively exciting a ⁇ 45° polarization mode to feed each of the plurality of dual-linearly polarized antennas through the power divider, and (3) a bottom metal reflector.
  • a broadband low-profile dual-linearly polarized antenna as shown in FIG. 1 and FIG. 2 includes a radiating portion 1 and a feed balun 2.
  • the radiating portion 1 can have a rectangular plate shape, and the feed balun 2 can be located at a center below the radiating portion 1.
  • the feed balun 2 can be placed on a feed circuit board 3.
  • the feed balun 2 can include a first balun 8 and a second balun 9 that are orthogonal to each other and can be connected to a lower surface of the radiating portion 1 to feed the radiating portion 1.
  • Two plates of the feed balun 2 can be snapped together through a middle slot, wherein an upper end of a middle part of one of the two plates can have a short slot, and a lower end of a middle part of another of the two plates can have a long slot, thereby implementing the feed balun 2 through a mating connection of the long slot and the short slot.
  • the radiation portion 1 includes a dielectric substrate, printed folded dipoles 7 spaced apart on an upper surface of the dielectric substrate, first coupled parasitic elements 4 on a lower surface of the dielectric substrate, and second coupled parasitic elements 5 on the upper surface of the dielectric substrate.
  • the radiating portion 1 can be implemented on a printed circuit board by a printing process.
  • the printed folded dipoles 7 may be placed at equal or unequal intervals on the dielectric substrate. As shown in FIG. 3 , a number of the printed folded dipoles 7 is four, and the printed folded dipoles 7 can be placed at equal intervals of 90 degrees. As further shown in FIG. 3 , each of the printed folded dipoles 7 can have a respective T-shaped match and have a respective T-shaped slit inside to form a respective current path. In some embodiments, shapes of such T-shaped slits inside of the printed folded dipoles 7 need not be totally identical.
  • a top of the T-shaped slits inside of upper and lower ones of the printed folded dipoles 7 can be narrower than a top of the T-shaped slits inside of left and right ones of the printed folded dipoles 7.
  • Each of the printed folded dipoles 7 includes a corresponding one of the first coupled parasitic elements 4 and a corresponding one of the second coupled parasitic elements 5 on either side, wherein the first coupled parasitic elements 4 are on the lower surface of the dielectric substrate, and the second coupled parasitic elements 5 are on the upper surface of the dielectric substrate.
  • the first and second coupled parasitic elements 4, 5 can be used to expand bandwidth and reduce a profile of the broadband low-profile dual-linearly polarized antenna.
  • Each of the printed folded dipoles 7 can be non-electrically connected to the corresponding one of the first and second coupled parasitic elements 4, 5, but inductively induce current on the corresponding one of the first and second coupled parasitic elements 4, 5.
  • Positions of the first and second coupled parasitic elements 4, 5 can be reasonably arranged according to requirements of inductive coupling. Accordingly, the specific shapes of the first and second coupled parasitic elements 4, 5 shown in FIG. 3 and FIG. 4 act only as an example, but not a limitation.
  • the first coupled parasitic elements 4 can be generally shaped as “ ⁇ ”, “ ⁇ ”, “ ⁇ ”, and “ ⁇ ”, and each of the first coupled parasitic elements 4 is located between respective ones of the adjacent ones of the printed folded dipoles 7 with a respective notch facing inward.
  • each of the first coupled parasitic elements 4 can be located inside of respective outer contours of the respective ones of the adjacent ones of the printed folded dipoles 7, and in some embodiments, each of the first coupled parasitic elements 4 can be located right below respective inner sides of the respective small opening between the respective ones of the adjacent ones of the printed folded dipoles 7.
  • each of the second coupled parasitic elements 5 can include two respective rectangular strips that need not be electrically connected in substantially the shape of the Chinese character " " and is placed adjacent to respective neighboring portions of respective outer edges of the respective ones of the adjacent ones of the printed folded dipoles 7.
  • such rectangular strips can be different sizes, and a long side can be parallel to the respective outer edges of one of the printed folded dipoles 7.
  • Each of the printed folded dipoles 7 can have a corresponding feed point 6 located therein, and the feed balun 2 can feed each of the printed folded dipoles 7 through the corresponding feed point 6 in a manner of coupled feed.
  • FIG. 5(a) is a side view of portions of the first and second baluns 8, 9 of the feed balun 2 (other portions of the baluns 8, 9 are obscured).
  • a middle of the second balun 9 can include a recess to bypass the first balun 8 to avoid electrical connection (or, alternatively, to form a protrusion).
  • FIG. 5(b) and FIG. 5(c) show the portions of the first and second baluns 8, 9 that are obscured in FIG. 5(a) .
  • shapes of the first and second baluns 8, 9 need not be the same, but both can be substantially " " " in shape and feed the radiating portion 1 at the top through a coupling manner.
  • the bottom of the feed balun 2 can be connected to a feed circuit.
  • the feed circuit can be implemented using a microstrip circuit.
  • FIG. 6 is a view of a broadband low-profile dual-linearly polarized antenna array device in accordance with disclosed embodiments.
  • FIG. 6 only shows two dual-linearly polarized antennas, but embodiments disclosed herein are not so limited, and such an antenna array device can include any number of dual-linearly polarized antennas as appropriate.
  • a feed network can feed the antenna array device.
  • the feed network can include a one-to-two power divider so as to feed each of the dual-linearly polarized antennas with equal amplitude and same phase.
  • the feed network can have two feed ports (i.e., port A and port B shown in FIG. 6 ) for respectively exciting two polarization modes of ⁇ 45° to feed each of the dual-linearly polarized antennas through the one-to-two power divider.
  • the antenna array device may also include a bottom metal reflector, and the feed network may be located above the bottom metal reflector.
  • the bottom metal reflector can be made of a metal plate, such as a copper plate, and can have a metal flange.
  • the antenna array device may include a radome.
  • standing wave ratios can be 1.7 or less, regardless of port A or port B.
  • isolation of port A and port B can be kept below -25 dB.
  • FIG. 9(a), FIG. 9(b) , FIG. 9(c), FIG. 9(d) , FIG. 10(a), FIG. 10(b) , FIG. 10(c), and FIG. 10(d) for port A or port B, an influence of frequency variation on radiation directivity of the broadband low-profile dual-linearly polarized antenna is not obvious, and radiant energy is mainly concentrated in the horizontal front.
  • FIG. 9(a), FIG. 9(b) , FIG. 9(c), FIG. 9(d) , FIG. 10(a), FIG. 10(b) , FIG. 10(c), and FIG. 10(d) when the frequency is around 1.8 GHz and 2.6 GHz, gains of port A and port B can both be maintained above 10 dBi, and efficiencies can both be maintained above 80%.
  • the broadband low-profile dual-linearly polarized antenna and the antenna array device disclosed herein can effectively realize a low-profile (reducing antenna thickness of about 35 mm in conventional cross-polarized antennas to 19 mm), can implement a wide frequency band of 1700 MHz to 2700 MHz, and can achieve high gain, high efficiency, high cross-polarization ratio, and high isolation. Furthermore, the broadband low-profile dual-linearly polarized antenna and the antenna array device disclosed herein have such advantages as simple structure, neat appearance, easy engineering implementation, and suitability for mass production.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Claims (13)

  1. Antenne double polarisée linéairement à profil bas et large bande comprenant :
    une partie rayonnante (1), dans laquelle la partie rayonnante (1) comprend un substrat diélectrique, quatre dipôles pliés imprimés (7) espacés sur une surface supérieure du substrat diélectrique, des premiers éléments parasites couplés (4) sur une surface inférieure du substrat diélectrique, et des seconds éléments parasites couplés (5) sur la surface supérieure du substrat diélectrique ; et
    un symétriseur d'alimentation (2) pour alimenter la partie rayonnante (1),
    dans laquelle chacun des quatre dipôles pliés imprimés (7) comprend un correspondant des premiers éléments parasites couplés (4) et un correspondant des seconds éléments parasites couplés (5) ;
    dans laquelle chacun des premiers éléments parasites couplés (4) est situé entre et configuré pour être couplé à certains adjacents respectifs des quatre dipôles pliés imprimés (7), et
    dans laquelle chacun des seconds éléments parasites couplés (5) est placé adjacent et configuré pour être couplé à des parties voisines respectives de bords extérieurs respectifs des certains adjacents respectifs des quatre dipôles pliés imprimés (7).
  2. Antenne double polarisée linéairement à profil bas et large bande selon la revendication 1, dans laquelle chacun des quatre dipôles pliés imprimés (7) a une correspondance en forme de T respective.
  3. Antenne double polarisée linéairement à profil bas et large bande selon la revendication 1 ou 2, dans laquelle les premiers éléments parasites couplés (4) sont formés généralement sous la forme d'un caractère hexadécimal Unicode 250C "┌", d'un caractère hexadécimal Unicode 2510 "┐", d'un caractère hexadécimal Unicode 2514 "└", et d'un caractère hexadécimal Unicode 2518 "┘", et dans lequel chacun des premiers éléments parasites couplés (4) comprend une encoche respective orientée vers l'intérieur.
  4. Antenne double polarisée linéairement à profil bas et large bande selon la revendication 3, dans laquelle chacun des premiers éléments parasites couplés (4) est situé à l'intérieur des certains adjacents respectifs des quatre dipôles pliés imprimés.
  5. Antenne double polarisée linéairement à profil bas et large bande selon la revendication 2, 3 ou 4, dans laquelle chacun des seconds éléments parasites couplés (5) comprend deux bandes rectangulaires respectives qui n'ont pas besoin d'être connectées électriquement.
  6. Antenne double polarisée linéairement à profil bas et large bande selon l'une quelconque des revendications 1 à 5, dans laquelle le symétriseur d'alimentation (2) comprend deux symétriseurs orthogonaux (8, 9), et dans lequel chacun des deux symétriseurs orthogonaux (8, 9) est formé sensiblement en forme de caractère hexadécimal Unicode 220F "
    Figure imgb0004
    ".
  7. Antenne double polarisée linéairement à profil bas et large bande selon l'une quelconque des revendications 1 à 6, dans laquelle le symétriseur d'alimentation (2) est configuré pour alimenter la partie rayonnante (1) d'une manière couplée en alimentation.
  8. Antenne double polarisée linéairement à profil bas et large bande selon l'une quelconque des revendications 1 à 7, dans laquelle les quatre dipôles pliés imprimés (7) sont placés à des intervalles égaux ou inégaux.
  9. Antenne double polarisée linéairement à profil bas et large bande selon la revendication 8, dans laquelle les quatre dipôles pliés imprimés (7) sont placés à des intervalles égaux de 90 degrés.
  10. Antenne double polarisée linéairement à profil bas et large bande selon l'une quelconque des revendications 1 à 9, dans laquelle la partie rayonnante (1) est rectangulaire.
  11. Dispositif de réseau d'antennes doubles polarisées linéairement à profil bas et large bande comprenant :
    une pluralité d'antennes doubles polarisées linéairement, dans lequel chacune de la pluralité d'antennes doubles polarisées linéairement comprend l'antenne double polarisée linéairement à profil bas et large bande selon l'une quelconque des revendications 1 à 10 ;
    un réseau d'alimentation comprenant un diviseur de puissance pour alimenter la pluralité d'antennes doubles polarisées linéairement avec une amplitude égale et la même phase, dans lequel le réseau d'alimentation a deux ports d'alimentation pour exciter respectivement deux modes de polarisation de ±45° pour alimenter chacun de la pluralité d'antennes doubles polarisées linéairement à travers le diviseur de puissance ; et
    un réflecteur inférieur en métal.
  12. Dispositif de réseau d'antennes doubles polarisées linéairement à profil bas et large bande selon la revendication 11, dans lequel la pluralité d'antennes doubles polarisées linéairement a un nombre de deux, et dans lequel le diviseur de puissance est un diviseur de puissance de un à deux.
  13. Dispositif de réseau d'antennes doubles polarisées linéairement à profil bas et large bande selon la revendication 11 ou 12, dans lequel le réflecteur métallique inférieur comprend une bride métallique.
EP18193154.4A 2017-09-08 2018-09-07 Antenne polarisée linéairement double extra-plate à large bande pour plateforme lte deux en une Active EP3454414B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710804959.4A CN109473777A (zh) 2017-09-08 2017-09-08 一种用于OneLTE二合一平台的宽带低剖面双线极化天线
US16/123,938 US10819042B2 (en) 2017-09-08 2018-09-06 Broadband low-profile dual-linearly polarized antenna for a OneLTE two-in-one platform

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EP3454414A1 EP3454414A1 (fr) 2019-03-13
EP3454414B1 true EP3454414B1 (fr) 2020-05-27

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CN110098477B (zh) * 2019-05-16 2022-08-26 京信通信技术(广州)有限公司 辐射结构及阵列天线
CN111600116A (zh) * 2020-04-17 2020-08-28 中天通信技术有限公司 基站天线振子及天线
CN112952378B (zh) * 2021-01-29 2022-10-28 西安交通大学 一种用于降低交叉极化耦合具有极化转换特性的去耦结构
CN112993557B (zh) * 2021-02-04 2022-10-18 上海大学 一种共口径低剖面双频双圆极化天线结构
CN114374092B (zh) * 2021-12-23 2022-12-06 西安电子科技大学 宽带低剖面小型化amc腔体单极子天线

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US3740754A (en) 1972-05-24 1973-06-19 Gte Sylvania Inc Broadband cup-dipole and cup-turnstile antennas
KR100870725B1 (ko) * 2008-03-06 2008-11-27 주식회사 감마누 기판형 광대역 이중편파 다이폴 안테나
CN102104203B (zh) * 2009-12-21 2014-06-11 摩比天线技术（深圳）有限公司 一种多频双极化天线阵子及其天线系统
CN202004160U (zh) * 2011-03-05 2011-10-05 广州桑瑞通信设备有限公司 双极化组合t型匹配振子基站天线
KR101524528B1 (ko) * 2015-02-17 2015-06-10 주식회사 감마누 다중대역 복사소자
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