WO2013143364A1 - Antenne à double polarisation à large bande et unité de rayonnement de ladite antenne - Google Patents

Antenne à double polarisation à large bande et unité de rayonnement de ladite antenne Download PDF

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Publication number
WO2013143364A1
WO2013143364A1 PCT/CN2013/071656 CN2013071656W WO2013143364A1 WO 2013143364 A1 WO2013143364 A1 WO 2013143364A1 CN 2013071656 W CN2013071656 W CN 2013071656W WO 2013143364 A1 WO2013143364 A1 WO 2013143364A1
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Prior art keywords
radiating
polarized antenna
pair
arms
broadband dual
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PCT/CN2013/071656
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English (en)
Chinese (zh)
Inventor
肖勇才
薛锋章
赖展军
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京信通信系统（中国）有限公司
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Publication of WO2013143364A1 publication Critical patent/WO2013143364A1/fr

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    • 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
    • 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
    • H01Q19/10—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 reflecting surfaces
    • 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 the field of mobile communication antennas, and in particular to a broadband dual-polarized antenna and a radiation unit thereof.
  • broadband antennas especially covering the following communication standards: GSM1800, DCSCDMA Broadband antennas in the 1.7GHz-2.7GHz band of 1900, IMT-2000, TD-CDMA, WLAN, WiMax, etc.
  • the electrical performance of the antenna requires high isolation and high gain.
  • the spindle cross-polarization discrimination rate requirement is greater than 15dB, and the ⁇ 60° cross-polarization discrimination rate requirement is greater than 10dB. At the same time, it requires good directivity and beam convergence, and low Third-order intermodulation indicator.
  • the symmetrical vibrator radiating unit will increase the size in the width direction of the vibrator arm orthogonal to the polarization.
  • the maximum contour size of the vibrator arm can be retained.
  • the vibrator arm used is a square structure, and the balun adopts a closed cylindrical structure, which is advantageous for coupling feeding and broadband characteristics, but the inner wall of the closed balun is not easy to ensure the plating quality, so the intermodulation characteristics of the radiating element are not easy. Guaranteed, and the isolation characteristics of the different polarizations of the vibrator are poor;
  • CN 101707291 Patent Application No. A discloses a broadband radiating element, which also does not solve the problem of large size of the vibrator arm.
  • the balun adopts a closed hollow square column structure, the technical effect of ensuring the intermodulation characteristics of the radiating element cannot be achieved. .
  • the invention is to solve the above contradiction, and provides a broadband double-polarized antenna radiating unit with simple structure, convenient manufacture, low cost and excellent performance, and further reduces the size of the radiating unit under the premise of maintaining the electrical performance of the radiating unit.
  • the present invention accommodates the proposal of the aforementioned radiating element, and provides a broadband dual-polarized antenna to make the radiating element more practical.
  • the present invention adopts the following technical solutions:
  • the broadband dual-polarized antenna radiating element of the present invention comprises two symmetric vibrators polarized orthogonally to each other, each pair of symmetric vibrators comprising a pair of radiating arms and respective radiating arms at opposite ends of the pair of radiating arms a pair of the same side support for fixing the balun on the metal reflector, and the pair of radiant arms are balancedly fed by the pair of baluns, the radiation arms are disposed on the same reference plane, and the entire radiation unit is related to the reference plane
  • the geometric center has a central symmetrical structure, and a space formed by extending the reference surface toward the bottom of the balun is defined as a receiving space, and each of the radiating arms is in a closed single line shape, and has a body at the reference surface. At the end of the radiating arm away from its respective balun, the radiating arm is bent from its body to provide an extension that extends to the receiving space.
  • the body of the radiation arm has any one of a square shape, a circular shape, and a polygonal shape.
  • the extension is defined to extend within a reference plane defined by the body.
  • a portion formed by bending between the expansion portion and the main body has an acute angle.
  • the extension is defined to extend perpendicular to the reference surface.
  • the portion where the expansion portion is bent is located outside the range of the reference surface defined by the main body.
  • the expansion portion includes a pair of straight arms bent from the main body and a transition belt connecting respective ends of the pair of straight arms.
  • the transition zone may have any one of an arc shape, a plurality of segments of a line shape, and a linear shape.
  • the pair of straight arms are parallel to each other.
  • the extension is generally arcuate.
  • the balun is an integral extension having a semi-circular cross section to form an open slot, and two baluns of each pair of the symmetric vibrators are disposed opposite each other with their open slots.
  • the open groove of the balun has a circular or polygonal cross section, and when it is a polygon, it is preferably rectangular.
  • the balun has a circular arc-shaped semi-circular shape.
  • the cross-section of the balun includes two symmetrically disposed arms and a connector that connects the same ends of the two arms to form a semi-surrounded connection.
  • baluns are joined adjacent to the metal reflector to integrally form the baluns to form a stable base made of balun.
  • the broadband dual-polarized antenna of the present invention comprises at least one radiating element as described above, wherein a plurality of radiating elements are arranged in a regular matrix and are fed in parallel, and the metal reflecting plate used in each radiating element is The same metal reflector.
  • the present invention has the following advantages:
  • the expansion portion is placed inside the defined accommodation space, and therefore, electrically, the radiation unit mounted on the metal reflection plate is substantially not occupied.
  • the extra external space under the premise that the radiation unit space volume is the same and the radiation arm space area is the same, the current and the magnetic current path length fed into the radiation arm are prolonged, and the resonant frequency of the symmetric vibrator is reduced; Under the premise of constant frequency, the size of each radiating arm can be further reduced, and the isolation between the two polarizations is increased.
  • the radiation unit is further structurally optimized by the two aspects of the design separately or in combination: on the one hand, the radiation arm is formed by single-line bending, the structure is very simple, the mold is easy to open and die-cast, and the structure is firm and reliable; on the other hand, Since the balun is designed with open slots to form a semi-open structure, the quality of the surface plating is easily ensured, which helps to improve the intermodulation index of the radiating element. In addition, the baluns are placed opposite each other with their open slots, which can be shielded. The parasitic radiation of the internal feeder of the balun helps to improve the cross-polarization index of the radiating element.
  • FIG. 1 is a perspective view of a first embodiment of a broadband dual-polarized antenna radiating unit according to the present invention, wherein a body of the radiating arm is circular and loaded with a U-shaped extension that is bent toward the bottom of the body;
  • FIG. 2 is a perspective view of a second embodiment of the broadband dual-polarized antenna radiating unit of the present invention, wherein the body of the radiating arm is square and loaded with a U-shaped extension that is bent toward the inside of the body;
  • FIG. 3 is a perspective view of a third embodiment of the broadband dual-polarized antenna radiating element of the present invention improved on the basis of the second embodiment shown in FIG. 2, wherein the expanded portion has an arc-shaped transition band;
  • FIG. 4 is a perspective view of a fourth embodiment of the broadband dual-polarized antenna radiating element of the present invention improved on the basis of the second embodiment shown in FIG. 2, which is loaded with a U-shaped extension portion bent toward the bottom of the main body. ;
  • FIG. 5 is a perspective view showing a typical example of a balun used in the broadband dual-polarized antenna radiating unit of the present invention, which is also applied to the embodiments disclosed in FIGS. 1 to 4, the horizontal groove of the balun.
  • the cross section is round;
  • Figure 6 is a perspective view of the modified balun on the basis of Figure 5, the open groove of the balun has a rectangular cross section;
  • Figure 8 is a diagram showing the isolation of two polarizations of the broadband dual-polarized radiating element simulation of the present invention.
  • the radiating element comprises two pairs of symmetric vibrators 1, 2, each of which comprises a pair of radiating arms adjacent to each other on the same plane (11a and 11b are a pair, 21a and 21b are a pair, the lower Similarly, each of the radiating arms 11a, 11b, 21a, 21b is supported by a balun 13a, 13b, 23a, 23b, and one end of the balun 13a, 13b, 23a, 23b is fixed to the metal reflector 4 of the antenna, and One end is fixedly coupled to a radiating arm 11a, 11b, 21a, 21b to form support for the respective radiating arms 11a, 11b, 21a, 21b, the baluns 13a, 13b, 23a, 23b and the respective radiating arms 11a, 11b, 21a
  • the connection point of 21b is located at one end of the other radiation arms 11b, 11a, 21b, 21
  • baluns ((13a, 13b) or (23a, 23b)) respectively support two radiation arms ((11a, 11b) or (21a, 21b)).
  • the baluns 13a, 13b, 23a, 23b are responsible for the balanced feeding of the radiating arms 11a, 11b, 21a, 21b in addition to the effects of the support of the radiating arms 11a, 11b, 21a, 21b.
  • a pair of baluns ((13a, 13b) or (23a, 23b)) are assembled with a pair of corresponding radiating arms ((11a, 11b) or (21a, 21b)) to form a complete pair of symmetric vibrators 1 or 2, the two pairs of symmetric vibrators 1, 2 are mounted orthogonally to each other in polarization, i.e., constitute the physical structure of the radiating element of the present invention.
  • the radiation unit of the present invention has a central symmetrical structure as a whole, and the four radiating arms 11a, 11b, 21a, 21b of the two pairs of symmetric vibrators 1, 2 are supported by four equal height baluns 13a, 13b, 23a, 23b and are disposed together.
  • the radiating element has a central symmetrical structure with respect to the geometric center of the reference surface, and each of the symmetric vibrators 1, 2 is symmetrical with respect to the geometric center of the reference plane.
  • a total of four combined units are formed by connecting each of the baluns 13a, 13b, 23a, 23b with a corresponding one of the radiating arms 11a, 11b, 21a, 21b, and the four combined units are
  • the structure is exactly the same.
  • a three-dimensional free space formed by extending the reference surface occupied by each of the radiation arms 11a, 11b, 21a, 21b toward the bottom direction of each of the baluns 13a, 13b, 23a, 23b is defined as an accommodation space.
  • the accommodation space includes both a range defined by the radiation arms 11a, 11b, 21a, 21b on the reference surface, and a spatial range between the bottoms of the radiation arms 11a, 11b, 21a, 21b and the metal reflector 4.
  • the radiation arms 11a, 11b, 21a, 21b used in the radiation unit are formed in a single line shape, that is, formed by the same continuous line member.
  • Each of the radiating arms 11a, 11b, 21a, 21b includes a main body 51 and an expanding portion 50.
  • the radiating arm 21a will be described as an example. Those skilled in the art will understand that the specific structure of the radiating arm 21a is also fully applicable to other embodiments.
  • the main body 51 is placed in the reference surface, that is, the shape is arranged along the reference surface, and is shaped into a circular shape in this embodiment.
  • the extension 50 extends into the range of the reference plane circled by the circular body 51 to fall within the range of the accommodation space. Since the radiation unit as a whole has a central symmetrical structure, the expansion portion 50 has an axisymmetric structure, and its axis of symmetry is the axis of symmetry of a pair of symmetric vibrators 2.
  • the expansion portion 50 is substantially U-shaped, and has a pair of parallel straight arms 52, 54 and a transition band 53 for connecting the ends of the pair of straight arms 52, 54 in the extending direction.
  • the transition zone 53 is linear.
  • the two straight arms 52, 54 are bent out from the main body 51, so that an acute angle is formed at the two portions where the main body 51 is bent, and the entire radiation arm 21a forms a rectangular notch at the distal end thereof away from the balun 23a to which it belongs.
  • the entire extension 50 like the entire body 51, is placed in the reference plane.
  • the length of the entire radiation arm 21a is lengthened by the addition of the expansion portion 50, and the path of the signal fed to the radiation arm 21a becomes long, and the resonance frequency of the symmetrical vibrator 2 can be reduced.
  • All of the radiating arms 11a, 11b, 21a, 21b have the same structure and are generally linear. It is obvious that the radiating element as a whole has a simple structure and is easy to die-cast.
  • each of the baluns 13a, 13b, 23a, 23b used in the radiation unit is the same, please refer to FIG. 1 and FIG. 5, and the baluns 13a, 13b, 23a, 23b used as an integral extension, the cross section thereof
  • the balun 23a is taken as an example, and the cross section thereof is specifically curved and semi-circular.
  • baluns (13a and 13b, 23a and 23b) of each of the pair of symmetric vibrators 1, 2 are disposed opposite each other with their open slots 31, whereby two pairs of symmetric vibrators 1, 2 are present throughout the radiating element
  • the respective two baluns (13a and 13b, 23a and 23b) face each other, and the four baluns 13a, 13b, 23a, 23b form a centrally symmetrical envelope structure having a cylindrical space of four-petal plum blossoms.
  • baluns 13a, 13b, 23a, 23b are connected by the connecting member 30 to form the integrated base 3.
  • baluns 13a, 13b, 23a, 23b are designed with open slots 31, a semi-open structure is formed, so that the quality of the surface plating is easily ensured, which helps to improve the intermodulation index of the radiation unit, and in addition, the baluns 13a, 13b 23a, 23b are placed opposite each other with their open slots 31, which can shield the parasitic radiation of the internal feeders of the balun 13a, 13b, 23a, 23b, and help to improve the cross-polarization index of the radiating element.
  • the base 3 formed by four baluns 13a, 13b, 23a, 23b can be used for attachment to the metal reflector 4, and each of the four baluns 13a, 13b, 23a, 23b is connected to a radiating arm 11a.
  • each of the radiation arms 11a, 11b, 21a, 21b includes a main body 51 and an expansion portion 50 formed by the main body 51 being bent and extending toward the accommodation space, and the pair of baluns facing the opening groove 31
  • the radiating arms form a pair of symmetric vibrators 1, 2, and the two pairs of symmetric vibrators 1, 2 are arranged orthogonally to each other with polarization, and the entire radiating element exhibits a central symmetric structure.
  • the current path length can be effectively extended while maintaining the overall size substantially unchanged, and the baluns 13a, 13b, 23a, 23b are designed to form a semi-open structure, and the surface plating thereof is performed.
  • the quality is more easily guaranteed, and the baluns 13a, 13b, 23a, 23b are arranged opposite each other with the open slots 31 and can shield the parasitic radiation of the balun internal feeder, further comprehensively ensuring the electrical performance of the entire radiating element.
  • FIG. 2 Please refer to the second embodiment of the broadband dual-polarized antenna radiating unit of the present invention disclosed in FIG. 2, which differs from the first embodiment only in the main body 51 of the radiating arm (taking 21a as an example) employed by the radiating unit.
  • the shape is square, and a bent portion is formed between the radiating arm 21a and the expanding portion 50 just at one side of one corner of the square main body 51 to form a rectangular notch.
  • the shape of the main body 51 of the radiating arm can be flexibly set, which can be not only a square shape or a circular shape in the foregoing embodiments, but also other polygons satisfying the aforementioned symmetrical characteristics.
  • the extension portion 50 also includes a pair of parallel arms 52, 54 which are parallel to each other, except that the transition band 53 connected between the two straight arms 52, 54 has an arc shape, and the curvature preferably exceeds a semi-circular arc to allow The extension 50 obtains a larger size.
  • the transition band 53 can also be designed as a multi-segment line shape composed of a plurality of segments of fold lines.
  • the specific shape of the expanding portion 50 can be directly arc-shaped or multi-segmented, and the same can be satisfied for extending the length of the radiating arm.
  • the second embodiment is improved, and the main body 51 of the radiating arm (for example, 21b is still square).
  • the extension 50 is still U-shaped, and the extension 50 extends within a reference plane defined by the body 51, which differs from the second embodiment in that the extension 50 is defined to be perpendicular to the reference plane
  • the direction extends to the inside of the accommodating space, and the portion where the expanded portion 50 and the main body 51 are bent is located outside the range of the reference surface defined by the main body 51.
  • the shape change of the expansion portion 50 is also applicable to the present embodiment, and the arrangement of the extension portion 50 of the present embodiment in the extending direction is also applicable to the other foregoing embodiments.
  • FIG. 6 further provides an improvement scheme for the balun.
  • the cross section of the balun (as exemplified by 23a) includes two symmetrically disposed arm members 231, 233 and a connector 232 that connects the same ends of the two arm members to form a semi-surrounded shape.
  • This improved balun is equally applicable to the foregoing embodiments of the present invention and is equally applicable to other potential embodiments not disclosed in the present invention.
  • Figures 7 and 8 show two polarizationd voltage standing wave ratio diagrams and isolation diagrams for a broadband dual-polarized antenna radiating element of the present invention.
  • the radiating element of the present invention has good broadband characteristics and can meet the needs of broadband applications of 1.7 GHz to 2.7 GHz.
  • a plurality of radiating elements according to the present invention are used, and the radiating elements are arranged in a single row or multiple columns in the form of a regular matrix, or are arranged on the same metal reflector 4 in a plurality of rows and columns. These radiating elements are fed in parallel according to the requirements of the communication antenna.
  • Such an antenna has been improved by its radiation unit, so the advantages of its radiation unit are inherited.
  • the broadband dual-polarized antenna radiating unit of the present invention has a simple structure, a small size, and good performance, and is suitable for mass production.

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Abstract

La présente invention concerne une antenne à double polarisation à large bande et une unité de rayonnement de ladite antenne. L'unité de rayonnement comprend deux paires de dipôles symétriques qui sont polarisées et mutuellement orthogonales, chaque paire de dipôles symétriques comprenant une paire de bras rayonnants et une paire de symétriseurs utilisée pour être fixé sur une plaque de réflexion métallique et mettant respectivement en œuvre un support latéral identique sur les bras rayonnants à des extrémités mutuellement proches des bras rayonnants. Les bras rayonnants sont agencés sur un même plan de référence, et la totalité de l'unité de rayonnement a une structure centro-symétrique par rapport au centre géométrique du plan de référence. Un espace formé par le plan de référence s'étendant dans une direction vers le fond du symétriseur est défini comme un espace de réception. Chaque bras rayonnant a une forme de ligne unique fermée et comporte un corps principal situé sur le plan de référence. Au niveau d'une extrémité du bras rayonnant éloignée d'un symétriseur correspondant, le bras rayonnant est muni d'une partie d'extension s'étendant vers l'espace de réception et pliée à partir du corps principal du bras rayonnant. Selon la présente invention, la longueur du chemin d'un courant dans le bras rayonnant est étendue en exploitant pleinement l'espace, de sorte que la taille du bras rayonnant peut être réduite sur la base d'un index électrique spécifié.
PCT/CN2013/071656 2012-03-26 2013-02-19 Antenne à double polarisation à large bande et unité de rayonnement de ladite antenne WO2013143364A1 (fr)

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CN201210083458.9 2012-03-26
CN201210083458.9A CN102544764B (zh) 2012-03-26 2012-03-26 宽带双极化天线及其辐射单元

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CN107086373A (zh) * 2016-12-29 2017-08-22 江苏华灿电讯股份有限公司 一种双频双极化宽频天线
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CN111342215A (zh) * 2020-03-08 2020-06-26 中国地质大学（武汉） 宽带平板反射天线及基于差分演化算法的优化设计方法
CN111416201A (zh) * 2020-04-30 2020-07-14 广东博纬通信科技有限公司 一种低成本的振子及天线
CN111987438A (zh) * 2020-07-23 2020-11-24 嘉兴美泰通讯技术有限公司 平面双极化振子板、天线振子单元及多频天线组阵单元
US11024980B2 (en) 2015-09-01 2021-06-01 Telefonaktiebolaget Lm Ericsson (Publ) Dual-polarized antenna
CN113555698A (zh) * 2020-04-24 2021-10-26 佛山市南海微波通讯设备有限公司 一种叠加结构宽带对称振子双极化天线
CN114122700A (zh) * 2021-11-18 2022-03-01 中信科移动通信技术股份有限公司 振子及基站天线
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CN103730728B (zh) * 2013-12-31 2016-09-07 上海贝尔股份有限公司 多频天线
US10205226B2 (en) 2014-11-18 2019-02-12 Zimeng LI Miniaturized dual-polarized base station antenna
CN106025573B (zh) * 2015-03-31 2019-03-26 启碁科技股份有限公司 天线及复合天线
EP3280006A1 (fr) 2016-08-03 2018-02-07 Li, Zimeng Antenne à double polarisation
CN107046167B (zh) * 2016-12-26 2023-12-08 东莞东山精密制造有限公司 超宽频带双极化天线
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CN107317099A (zh) * 2017-03-27 2017-11-03 广东顺德中山大学卡内基梅隆大学国际联合研究院 一种多频带圆极化宽频交叉偶极子天线
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CN106961010A (zh) * 2017-04-27 2017-07-18 深圳国人通信股份有限公司 一种三频双极化基站天线
CN110622351B (zh) 2017-05-04 2021-04-20 华为技术有限公司 双极化辐射元件和天线
CN110832699B (zh) * 2017-09-12 2021-10-22 华为技术有限公司 双极化辐射元件和天线
CN109546312B (zh) * 2018-12-29 2023-12-22 京信通信技术(广州)有限公司 基站天线及其低频辐射单元
CN111063984A (zh) * 2019-12-27 2020-04-24 京信通信技术(广州)有限公司 基站天线及辐射单元
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