WO2022000622A1 - 隔离板结构、天线阵及基站 - Google Patents

隔离板结构、天线阵及基站 Download PDF

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Publication number
WO2022000622A1
WO2022000622A1 PCT/CN2020/103465 CN2020103465W WO2022000622A1 WO 2022000622 A1 WO2022000622 A1 WO 2022000622A1 CN 2020103465 W CN2020103465 W CN 2020103465W WO 2022000622 A1 WO2022000622 A1 WO 2022000622A1
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WIPO (PCT)
Prior art keywords
plate structure
isolation plate
antenna
antenna array
isolation
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PCT/CN2020/103465
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English (en)
French (fr)
Inventor
徐海鹏
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瑞声声学科技(深圳)有限公司
瑞声精密制造科技(常州)有限公司
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Application filed by 瑞声声学科技(深圳)有限公司, 瑞声精密制造科技(常州)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Publication of WO2022000622A1 publication Critical patent/WO2022000622A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • 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
    • H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path

Definitions

  • the present application relates to the technical field of antenna arrays, and in particular, to an isolation plate structure, an antenna array and a base station.
  • the fifth generation of mobile communications has introduced a variety of new technologies, among which large-scale array antennas are extremely important.
  • 5G large-scale array antennas In order to meet the communication distance between the base station and the user, and at the same time take into account the miniaturization and light weight of the antenna array, 5G large-scale array antennas generally use a large number of antenna elements to form an array, and the column spacing of the antenna elements is generally half wavelength. Due to the small interval between the antenna units, the isolation between the antenna unit ports becomes poor, the antenna unit wavelength in the array is widened, the beam is tilted, and the gain decreases.
  • the purpose of the present application is to provide an isolation plate structure, an antenna array and a base station to improve the isolation between the ports of the antenna units.
  • An isolation plate structure is used for an antenna array to isolate an antenna unit group.
  • the non-closed loops are periodically arranged along the length direction of the main body plate.
  • the perimeter of the non-closed loop is a half wavelength of the working frequency of the antenna unit
  • the length of the notch of the non-closed ring is 0.1 to 0.3 of the circumference of the non-closed ring.
  • non-closed ring is axially symmetrical, and the symmetry axis of the non-closed ring is parallel to the width direction of the isolation plate structure;
  • the non-closed ring is a rectangular non-closed ring, a circular non-closed ring or an elliptical non-closed ring.
  • the metal sheet and the non-closed ring are arranged in sequence along the length direction of the main body plate.
  • the metal sheet and the adjacent non-closed rings are arranged at intervals.
  • the present application further provides an antenna array, which includes a plurality of antenna element groups arranged along a first direction and the above-mentioned isolation plate structure, and the isolation plate structure is provided between two adjacent groups of the antenna element groups.
  • the antenna unit group includes a plurality of antenna units arranged along a second direction, the second direction is perpendicular to the first direction, and the length direction of the isolation plate structure is parallel to the second direction.
  • the non-closed loop faces the antenna unit, and the projection of the center of the antenna unit on the isolation plate structure coincides with the center of the non-closed loop.
  • the antenna array further includes a substrate, the antenna unit group and the isolation plate structure are both mounted on the substrate, and the gap of the non-closed loop faces away from the substrate.
  • the present application also provides a base station, including the above-mentioned antenna array.
  • the beneficial effect of the present application is that: by arranging an isolation plate structure between the adjacent two groups of antenna unit groups, and the isolation plate structure adopts a setting in which metal sheets and non-closed loops are periodically arranged along the length direction of the main body plate, not only can improve the The isolation between the adjacent two groups of antenna unit group ports can effectively improve the isolation of the entire antenna array, and compared with the common metal sheet isolation plate, it will not affect the antenna pattern.
  • FIG. 1 is a schematic structural diagram of an antenna array using a common metal sheet isolation plate
  • FIG. 2 is a schematic diagram of the isolation between different columns and co-polarization of the antenna array in FIG. 1;
  • FIG. 3 is a schematic diagram of the iso-column and iso-polar isolation of the antenna array in FIG. 1;
  • FIG. 5 is a schematic structural diagram of another angle of the antenna array in FIG. 4;
  • FIG. 6 is a schematic structural diagram of the isolation plate structure of the antenna array in FIG. 4;
  • FIG. 7 is a schematic structural diagram of another angle of the isolation plate structure in FIG. 6;
  • FIG. 8 is a schematic diagram of iso-column and co-polar isolation of the antenna array in FIG. 4;
  • FIG. 9 is a schematic diagram of iso-row and iso-polar isolation of the antenna array in FIG. 4 .
  • the present application provides an antenna array 100 of a base station, including a plurality of antenna element groups 20 and a spacer plate structure 10 arranged along a first direction 41 , and between adjacent two groups of antenna element groups 20 .
  • the isolation plate structure 10 is provided to isolate two adjacent antenna element groups 20 , and the isolation plate structure 10 and the adjacent two adjacent antenna element groups 20 are arranged at intervals.
  • the isolation plate structure 10 includes a main body plate 11 , a metal sheet 12 and a non-closed ring 13 disposed on the main body plate 11 , and the metal sheet 12 and the non-closed ring 13 are periodic along the length direction of the main body plate 11 .
  • Sexual arrangement is possible to provide a main body plate 11 , a metal sheet 12 and a non-closed ring 13 disposed on the main body plate 11 , and the metal sheet 12 and the non-closed ring 13 are periodic along the length direction of the main body plate 11 .
  • the isolation plate structure 10 By arranging the isolation plate structure 10 between the two adjacent antenna element groups 20, and the isolation plate structure 10 adopts the arrangement in which the metal sheets 12 and the non-closed loops 13 are periodically arranged along the length direction of the main body plate 11, the phase difference can be improved.
  • the isolation between the ports of the adjacent two antenna element groups 20 can effectively improve the isolation of the entire antenna array 100.
  • the metal sheet 12' is used along the length of the main body plate 11'.
  • the antenna array 100' arranged in an extended direction will not affect the antenna pattern.
  • the antenna unit group 20 includes a plurality of antenna units 21 arranged along the second direction 42 , the second direction 42 is perpendicular to the first direction 41 , and the isolation plate structure 10 has The length direction is parallel to the second direction 42 . In this way, the distances from each antenna element 21 in the antenna element group 20 to the isolation plate structure 10 are equal, and the distances between two adjacent antenna elements 21 in the antenna element group 20 are equal, so as to better meet the communication requirements and improve the isolation. .
  • the perimeter of the non-closed loop 13 is a half wavelength of the operating frequency of the antenna unit 21 , and the length of the gap of the non-closed loop 13 is 0.1 to 0.3 of the perimeter of the non-closed loop 13 .
  • the isolation between the adjacent two antenna element groups 20 can be further improved, thereby improving the electrical performance index of the antenna array 100, and at the same time, it is also beneficial to improve the receiving sensitivity and increase the channel transmission rate.
  • the non-closed ring 13 is axisymmetric, and the symmetry axis of the non-closed ring 13 is parallel to the width direction of the isolation plate structure 10 , and the non-closed ring 13 is a rectangular non-closed ring 13 .
  • the non-closed ring 13 may also be a circular non-closed ring 13 or an elliptical non-closed ring 13 .
  • the metal sheet 12 and the non-closed ring 13 are arranged in sequence along the length direction of the main body plate 11 . That is, in the present embodiment, the metal sheet 12 and the non-closed ring 13 are arranged one by one along the length direction of the main body plate 11 , and each time a metal sheet 12 or a non-closed ring 13 is provided, it is adjacent to the metal sheet 12 or the non-closed ring 13 A non-closed ring 13 or metal sheet 12 is provided, which has a simple structure and is convenient for production and processing.
  • each time a metal sheet 12 or a non-closed ring 13 is provided two or more non-closed rings 13 or metal sheets 12 may be provided next to the metal sheet 12 or the non-closed ring 13 .
  • the metal sheet 12 and the non-closed ring 13 along the length direction can be arranged on one side or both sides of the main body plate 11 .
  • the metal sheets 12 and the adjacent non-closed rings 13 are arranged at intervals, and the distance between each metal sheet 12 and each adjacent non-closed rings 13 is equal, that is, the metal sheets 12 and the non-closed loops 13 are arranged at equal intervals along the length direction of the main body plate 11 , which can not only better meet the isolation requirements of the antenna array 100 , but also make the overall layout of the antenna array 100 more reasonable and beautiful.
  • the metal sheet 12 and the adjacent non-closed rings 13 can also be closely connected.
  • the main body board 11 may be a circuit board or a slotted metal sheet.
  • the non-closed loop 13 faces the antenna unit 21 , and the projection of the center of the antenna unit 21 on the isolation plate structure 10 coincides with the center of the non-closed loop 13 . That is, in this embodiment, each metal sheet 12 faces the interval between every two adjacent antenna units 21 , each non-closed loop 13 faces each antenna unit 21 , and the non-closed loop 13 is along the main body plate 11 .
  • the length of the antenna unit 21 in the length direction is greater than the length of the antenna unit 21 along the length direction of the main body plate 11 , so as to better improve the isolation of the antenna array 100 and improve the electrical performance index of the antenna array 100 .
  • two adjacent isolation plate structures 10 are symmetrically arranged with respect to the center line of the antenna element group 20 , and the center line of the antenna element group 20 is the connection between the centers of the antenna elements 21 . line, so as to improve the sensitivity of the signal received by the antenna unit 21.
  • the antenna array 100 further includes a substrate 30 on which the antenna unit group 20 and the isolation plate structure 10 are mounted to form the antenna array 100 for use in a base station.
  • the notch of the non-closed ring 13 is opened away from the substrate 30 .
  • the antenna array 100 of the base station provided by the present application can maximize the isolation of the entire antenna array 100, enhance the receiving sensitivity, and speed up the signal transmission speed.
  • the antenna pattern has an effect.
  • FIG. 8 and FIG. 9 a schematic diagram of co-polar isolation and a schematic diagram of hetero-polar isolation of two adjacent antenna element groups 20 of the antenna array 100 provided by the present application are respectively, and the specific curve A is ports 1 and 3
  • the isolation degree between the two, curve B is the isolation degree between ports 2 and 4
  • the curve C is the isolation degree between ports 2 and 3.
  • the iso-column isolation and iso-co-polar isolation of the antenna array 100 are improved by about 1 dB and 4 dB, respectively.

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  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

本申请提供了一种隔离板结构、天线阵及基站。基站包括天线阵，天线阵包括若干沿第一方向排布的天线单元组及隔离板结构，且相邻两组天线单元组之间设有隔离板结构，以隔离相邻两组天线单元组。隔离板结构包括主体板及设置于主体板上的金属片及非闭合环，金属片及非闭合环沿主体板的长度方向周期性排布。本申请的天线阵通过在相邻两组天线单元组之间设置隔离板结构，且隔离板结构采用金属片及非闭合环沿主体板的长度方向周期性排布的设置，不仅能够提高相邻两组天线单元组端口间的隔离度，从而有效提升整个天线阵的隔离度，并且相对于普通的金属片隔离板不会对天线方向图产生影响。

Description

隔离板结构、天线阵及基站 技术领域
本申请涉及天线阵技术领域，尤其涉及一种隔离板结构、天线阵及基站。
 背景技术
第五代移动通信引入了多种新技术，大规模阵列天线便是其中极其重要的一项。为了满足基站与用户间通信距离，同时兼顾天线阵的小型化与轻量化，5G大规模阵列天线普遍采用大量的天线单元组阵，天线单元的列间隔一般为半波长。由于天线单元间隔较小，天线单元端口间隔离度变差，阵中天线单元波宽展宽，波束倾斜，增益下降。
 技术问题
因此，有必要提供一种能够提高天线单元端口间的隔离度，并且不会对天线方向图产生影响的隔离板结构。
 技术解决方案
本申请的目的在于提供一种隔离板结构、天线阵及基站，以提升天线单元端口间的隔离度。
本申请的技术方案如下：
一种隔离板结构，用于天线阵以隔离天线单元组，其特征在于，所述隔离板结构包括主体板及设置于所述主体板上的金属片及非闭合环，所述金属片及所述非闭合环沿所述主体板的长度方向周期性排布。
进一步地，所述非闭合环的周长为所述天线单元工作频率的半波长；
所述非闭合环的缺口的长度为所述非闭合环的周长的0.1至0.3。
进一步地，所述非闭合环轴对称，且所述非闭合环的对称轴与所述隔离板结构的宽度方向平行；
所述非闭合环为矩形非闭合环、圆形非闭合环或椭圆形非闭合环。
进一步地，所述金属片及所述非闭合环沿所述主体板的长度方向依次设置。
进一步地，所述金属片与相邻的所述非闭合环之间间隔设置。
本申请还提供一种天线阵，包括若干沿第一方向排布的天线单元组及上述隔离板结构，且相邻两组所述天线单元组之间设有所述隔离板结构。
进一步地，所述天线单元组包括若干沿第二方向排布的天线单元，所述第二方向垂直于所述第一方向，且所述隔离板结构的长度方向平行于所述第二方向。
进一步地，所述非闭合环正对所述天线单元，且所述天线单元的中心在所述隔离板结构的投影与所述非闭合环的中心重合。
进一步地，所述天线阵还包括基板，所述天线单元组及所述隔离板结构均安装于所述基板上，所述非闭合环的缺口背离所述基板。
另外，本申请还提供一种基站，包括上述天线阵。
 有益效果
本申请的有益效果在于：通过在相邻两组天线单元组之间设置隔离板结构，且隔离板结构采用金属片及非闭合环沿主体板的长度方向周期性排布的设置，不仅能够提高相邻两组天线单元组端口间的隔离度，从而有效提升整个天线阵的隔离度，并且相对于普通的金属片隔离板不会对天线方向图产生影响。
 附图说明
图1为采用普通的金属片隔离板的天线阵的结构示意图；
图2为图1中天线阵的异列同极化隔离度示意图；
图3为图1中天线阵的异列异极化隔离度示意图；
图4为本申请提供的天线阵的结构示意图；
图5为图4中天线阵的另一角度的结构示意图；
图6为图4中的天线阵的隔离板结构的结构示意图；
图7为图6中隔离板结构的另一角度的结构示意图；
图8为图4中天线阵的异列同极化隔离度示意图；
图9为图4中天线阵的异列异极化隔离度示意图。
 本发明的实施方式
下面结合附图和实施方式对本申请作进一步说明。
如图4及图5所示，本申请提供一种基站的天线阵100，包括若干沿第一方向41排布的天线单元组20及隔离板结构10，相邻两组天线单元组20之间设有隔离板结构10，以隔离相邻两组天线单元组20，且隔离板结构10与相邻两组天线单元组20均间隔设置。如图6及图7所示，隔离板结构10包括主体板11及设置于主体板11上的金属片12及非闭合环13，金属片12及非闭合环13沿主体板11的长度方向周期性排布。
通过在相邻两组天线单元组20之间设置隔离板结构10，且隔离板结构10采用金属片12及非闭合环13沿主体板11的长度方向周期性排布的设置，不仅能够提高相邻两组天线单元组20端口间的隔离度，从而有效提升整个天线阵100的隔离度，并且相对于如图1所示的隔离板结构10’采用金属片12’沿主体板11’的长度方向延伸设置的天线阵100’不会对天线方向图产生影响。
在本实施例中，如图4及图5所示，天线单元组20包括若干沿第二方向42排布的天线单元21，第二方向42垂直于第一方向41，且隔离板结构10的长度方向平行于第二方向42。如此，天线单元组20内每一天线单元21至隔离板结构10的距离相等，而且天线单元组20内相邻两个天线单元21的距离相等，从而更好的满足通信需求，以及提升隔离度。
值得一提地，在本实施例中，非闭合环13的周长为天线单元21工作频率的半波长，非闭合环13的缺口的长度为非闭合环13的周长的0.1至0.3。如此，能够进一步提高相邻两组天线单元组20之间的隔离度，进而提高天线阵100的电性能指标，同时还有利于提高接收灵敏度，增加信道传输速率。
在本实施例中，如图6及图7所示，非闭合环13轴对称，且非闭合环13的对称轴与隔离板结构10的宽度方向平行，非闭合环13为矩形非闭合环13。当然，在其他实施例中，非闭合环13也可以为圆形非闭合环13或椭圆形非闭合环13。
在本实施例中，金属片12及非闭合环13沿主体板11的长度方向依次设置。即在本实施例中，金属片12及非闭合环13沿主体板11的长度方向一一设置，每设置一金属片12或一非闭合环13，紧挨该金属片12或非闭合环13设置一非闭合环13或金属片12，结构简单，便于生产加工。当然，在其他实施例中，也可以每设置一金属片12或一非闭合环13，紧挨该金属片12或非闭合环13设置两个或多个非闭合环13或金属片12。此外，可根据实际情况，在主体板11的一侧或两侧设置沿长度方向的金属片12及非闭合环13。
进一步地，在本实施例中，金属片12与相邻的非闭合环13之间间隔设置，且每一金属片12与相邻的每一非闭合环13之间的距离相等，即金属片12及非闭合环13沿主体板11的长度方向等间距设置，不仅能够较佳的满足天线阵100的隔离度的要求，并且使得天线阵100的整体布局更加合理、美观。当然，在其他实施例中，金属片12与相邻的非闭合环13之间也可以紧密相连。此外，在本实施例中，主体板11可以为线路板或开槽金属薄板。
在本实施例中，如图4及图6所示，非闭合环13正对天线单元21，且天线单元21的中心在隔离板结构10的投影与非闭合环13的中心重合。即在本实施例中，每一金属片12正对每两相邻天线单元21之间的间隔处，每一非闭合环13正对每一天线单元21，且非闭合环13沿主体板11的长度方向的长度大于天线单元21沿主体板11的长度方向的长度，从而更好的改善天线阵100的隔离度，提高天线阵100的电性能指标。
在本实施例中，如图4及图5所示，相邻两个隔离板结构10关于天线单元组20的中心线对称设置，天线单元组20的中心线为各天线单元21的中心的连线，以良好的提升天线单元21接收信号的灵敏度。
在本实施例中，如图4及图5所示，天线阵100还包括基板30，天线单元组20及隔离板结构10均安装于基板30上，以形成天线阵100，从而应用于基站。非闭合环13的缺口背离基板30开设。
综上，本申请提供的基站的天线阵100即可最大化的提高整个天线阵100的隔离度，增强接收灵敏度，加快信号传输速度，并且相对于图1采用普通的金属片隔离板不会对天线方向图产生影响。如图8及图9所示，分别为本申请提供的天线阵100的相邻两天线单元组20的同极化隔离度示意图及异极化隔离度示意图，具体的曲线A为端口1、3之间的隔离度，曲线B为端口2、4之间的隔离度，曲线C为端口2、3之间的隔离度。请参照图2及图3所示的采用普通隔离板的天线阵的性能图，其中曲线A’为曲线A的对比曲线，曲线B’为曲线B的对比曲线，曲线C’为曲线C的对比曲线,天线阵100的异列同极化隔离度和异列异极化隔离度分别提升约1dB及4dB。
以上所述的仅是本申请的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本申请创造构思的前提下，还可以做出改进，但这些均属于本申请的保护范围。

Claims (10)

  1. 一种隔离板结构，用于天线阵以隔离天线单元组，其特征在于，所述隔离板结构包括主体板及设置于所述主体板上的金属片及非闭合环，所述金属片及所述非闭合环沿所述主体板的长度方向周期性排布。
  2. 根据权利要求1所述的隔离板结构，其特征在于，所述非闭合环的周长为所述天线单元组工作频率的半波长；
    所述非闭合环的缺口的长度为所述非闭合环的周长的0.1至0.3。
  3. 根据权利要求1所述的隔离板结构，其特征在于，所述非闭合环轴对称，且所述非闭合环的对称轴与所述隔离板结构的宽度方向平行；
    所述非闭合环为矩形非闭合环、圆形非闭合环或椭圆形非闭合环。
  4. 根据权利要求1所述的隔离板结构，其特征在于，所述金属片及所述非闭合环沿所述主体板的长度方向依次设置。
  5. 根据权利要求1或4所述的隔离板结构，其特征在于，所述金属片与相邻的所述非闭合环之间间隔设置。
  6. 一种天线阵，其特征在于，包括若干沿第一方向排布的天线单元组及如权利要求1至5任一项所述的隔离板结构，且相邻两组所述天线单元组之间设有所述隔离板结构。
  7. 根据权利要求6所述的天线阵，其特征在于，所述天线单元组包括若干沿第二方向排布的天线单元，所述第二方向垂直于所述第一方向，且所述隔离板结构的长度方向平行于所述第二方向。
  8. 根据权利要求6或7所述的天线阵，其特征在于，所述非闭合环正对所述天线单元，且所述天线单元的中心在所述隔离板结构的投影与所述非闭合环的中心重合。
  9. 根据权利要求7所述的天线阵，其特征在于，所述天线阵还包括基板，所述天线单元组及所述隔离板结构均安装于所述基板上，所述非闭合环的缺口背离所述基板。
  10. 一种基站，其特征在于，包括如权利要求6至9任一项所述的天线阵。
PCT/CN2020/103465 2020-07-01 2020-07-22 隔离板结构、天线阵及基站 WO2022000622A1 (zh)

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