WO2021248611A1 - 超表面天线系统及通讯终端 - Google Patents

超表面天线系统及通讯终端 Download PDF

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Publication number
WO2021248611A1
WO2021248611A1 PCT/CN2020/101271 CN2020101271W WO2021248611A1 WO 2021248611 A1 WO2021248611 A1 WO 2021248611A1 CN 2020101271 W CN2020101271 W CN 2020101271W WO 2021248611 A1 WO2021248611 A1 WO 2021248611A1
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WO
WIPO (PCT)
Prior art keywords
metasurface
ground layer
antenna system
clearance gap
antenna
Prior art date
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Ceased
Application number
PCT/CN2020/101271
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English (en)
French (fr)
Inventor
陈思
武景
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AAC Technologies Holdings Shenzhen Co Ltd
AAC Module Technologies Changzhou Co Ltd
Original Assignee
AAC Acoustic Technologies Shenzhen Co Ltd
AAC Module Technologies Changzhou Co Ltd
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Application filed by AAC Acoustic Technologies Shenzhen Co Ltd, AAC Module Technologies Changzhou Co Ltd filed Critical AAC Acoustic Technologies Shenzhen Co Ltd
Publication of WO2021248611A1 publication Critical patent/WO2021248611A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • 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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • 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
    • H01Q13/10—Resonant slot antennas
    • 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
    • H01Q21/00—Antenna arrays or systems
    • 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
    • H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands

Definitions

  • the invention relates to the field of communication technology, in particular to a supersurface antenna system and a communication terminal.
  • 5G is the focus of research and development in the global industry. Among them, the high carrier frequency and large bandwidth characteristics of millimeter wave antennas are the main guarantee for achieving 5G ultra-high data transmission rates.
  • millimeter-wave antennas of related technologies often adopt patch antenna designs, or double-layer patch antenna designs, and use probe feeding.
  • the patch antenna design has a narrow bandwidth, and the laminated patch design can effectively increase the bandwidth, but it will inevitably increase the antenna profile.
  • the antenna bandwidth obtained by the above two methods can only cover n257 (26.5GHz-29.5GHz) and n261 (27.5GHz- 28.35GHz) frequency band, it is difficult to simultaneously cover n258 (24.25 GHz-27.5GHz).
  • the technical problem to be solved by the present invention is to provide a metasurface antenna system and communication terminal with wide bandwidth coverage and low profile.
  • the present invention provides a metasurface antenna system, the metasurface antenna system includes an antenna unit, and the antenna unit includes:
  • the strip line unit includes a first ground layer and a second ground layer that are spaced and opposed to each other, a connection block connecting the first ground layer and the second ground layer, and a space provided therebetween.
  • a first base material layer the first base material being laminated on a side of the first grounding layer away from the second grounding layer;
  • a metasurface array antenna the metasurface array antenna is stacked on a side of the first substrate layer away from the first formation, the metasurface array antenna includes a plurality of metasurfaces spaced apart from each other and arranged in a matrix Unit, each of the metasurface units forms a coupling feed with the clearance gap.
  • the orthographic projections of the plurality of super-surface units toward the first ground layer are symmetrically arranged with respect to the geometric center of the clearance gap.
  • the signal line extends in a first direction
  • the clearance gap includes a first slit extending in a second direction
  • the first slit straddles the signal line, wherein the first direction is perpendicular to the signal line.
  • the second direction is perpendicular to the signal line.
  • the clearance gap further includes a second gap extending along the first direction from opposite ends of the first gap.
  • the strip line unit further includes a plurality of first ground pillars and a plurality of second ground pillars sandwiched between the first ground layer and the second ground layer; Grounding pillars are arranged around the clearance gap, and a plurality of second grounding pillars are separately arranged on both sides of the signal line.
  • the strip line unit further includes a second substrate layer sandwiched between the first ground layer and the second ground layer, and the signal line is embedded in the second substrate layer Inside.
  • the metasurface antenna system is formed by a plurality of the antenna units arranged in a row in sequence and spliced together.
  • a plurality of the antenna units are arranged in sequence along the first direction.
  • the metasurface array antenna includes four metasurface units arranged in a 2*2 array.
  • the present invention also provides a communication terminal, which includes the above-mentioned metasurface antenna system provided by the present invention.
  • a clearance gap is provided in the first ground layer of the strip line unit, and the signal line and the clearance gap form a coupling feed through the gap above the clearance gap.
  • the metasurface array antenna is symmetrically loaded to make the clearance gap and the metasurface array antenna form a coupling feed.
  • the signal line couples the radiated signal to the clearance gap, causing the clearance gap to generate low-frequency resonance, and then couples the clearance gap to the metasurface array antenna.
  • the array antenna generates high-frequency resonance, thereby achieving the purpose of increasing the bandwidth, which can simultaneously cover the n257, n258 and n261 standard frequency bands of 5G millimeter waves; and the metasurface array antenna itself has special electromagnetic characteristics, which makes the metasurface antenna system small Optimized, low profile, large bandwidth and high gain performance.
  • Figure 1 is a schematic diagram of the structure of the metasurface antenna system of the present invention.
  • FIG. 2 is an exploded schematic diagram of the three-dimensional structure of one of the antenna units of the metasurface antenna system of the present invention
  • FIG. 3 is a schematic diagram of a part of the structure of the strip line unit of the antenna unit in FIG. 2;
  • Figure 4 is a performance curve diagram of the metasurface antenna system of the present invention.
  • FIG. 5 is a schematic diagram of the structure of the metasurface antenna system of the present invention applied to the side of the communication terminal of the present invention
  • Fig. 6 is a graph of antenna gain of the communication terminal of Fig. 5;
  • FIG. 7 is a schematic diagram of the structure of the supersurface antenna system of the present invention applied to the back of the communication terminal of the present invention
  • Fig. 8 is a graph of antenna gain of the communication terminal of Fig. 7.
  • the present invention provides a metasurface antenna system 100.
  • the metasurface antenna system 100 includes an antenna unit 10, and the antenna unit 10 includes strip lines that are sequentially stacked from bottom to top.
  • Unit 1 first substrate layer 2, metasurface array antenna 3.
  • the strip line unit 1 includes a first ground layer 11 and a second ground layer 12 arranged opposite to each other at intervals, and a signal line 14 arranged at intervals between the first ground layer 11 and the second ground layer 12 . That is, the signal line 14 is located between the first ground layer 11 and the second ground layer 12, and is spaced apart from the first ground layer 11 and the second ground layer 12, respectively.
  • the first ground layer 11 is provided with a clearance gap 111 passing through it, and the clearance gap and the signal line 14 form a coupling feed.
  • the signal line 14, the first ground layer 11, and the second ground layer 12 jointly form a stripline structure, and the stripline structure is used to transmit a radiated signal and couple the radiated signal to The clearance gap 111, and the clearance gap 111 then couples the radiation signal to the metasurface array antenna 3.
  • the clearance gap 111 is used to generate low-frequency radiation signals transmitted by the strip line structure formed by the signal line 14, the first ground layer 11, and the second ground layer 12 coupled to it. Resonant signal, and couple the low-frequency resonant signal to the metasurface array antenna 3, thereby generating a high-frequency resonant signal.
  • the first substrate layer 2 is stacked on a side of the first ground layer 11 away from the second ground layer 12.
  • the metasurface array antenna 3 is stacked on the side of the first substrate layer 2 away from the first ground layer 11. That is, the strip line unit 1 and the metasurface array antenna 3 are respectively attached to opposite sides of the first substrate layer 2, so that the strip line unit 1 and the metasurface array antenna 3 are spaced apart.
  • the strip line unit 1 further includes a plurality of first ground pillars 15 and a plurality of second ground pillars 16 sandwiched between the first ground 11 and the second ground layer 12.
  • a plurality of the first grounding pillars 15 are arranged around the clearance gap 111, and a plurality of the second grounding pillars 16 are separately arranged on both sides of the signal line 14.
  • the first grounding post 15 and the second grounding post 16 can be arranged at the same time or separately. This arrangement further enhances the isolation between the antenna units 10, thereby further increasing the bandwidth of the entire metasurface antenna system 100.
  • a plurality of the first grounding posts 15 are spaced apart from each other and form a rectangular structure together to enclose the clearance gap 111.
  • the plurality of second grounding pillars 16 are arranged at intervals from each other and extend along the signal line 14 from the connecting block 13 to the space enclosed by the first grounding pillar 15.
  • the strip line unit 1 further includes a second substrate layer 17 sandwiched between the first ground layer 11 and the second ground layer 12, and the signal line 14 is embedded in the In the second base layer 12, the signal line 14 is suspended between the first ground layer 11 and the second ground layer 12 so as to form a strip line structure and form a coupling feed with the clearance gap 111.
  • the signal line 14 can also be suspended between the first ground layer 11 and the second ground layer 12 by setting other structures, for example, by setting a multilayer base between the first ground layer 11 or the second ground layer 12.
  • the signal line 14 is supported by one of the substrate layers.
  • the metasurface array antenna 3 includes a plurality of metasurface elements 31 spaced apart from each other and arranged in a matrix, and each of the metasurface elements 31 forms a coupling feed with the clearance gap 111.
  • the metasurface array antenna 3 is coupled with the clearance gap 111 and generates a high-frequency resonance signal.
  • the metasurface array antenna 3 includes four metasurface units 31 arranged in a 2*2 array.
  • the metasurface array antenna 3 is a two-dimensional manifestation of metamaterials. It is composed of periodic metasurface elements (patches). Due to its special electromagnetic characteristics, the metasurface antenna system achieves miniaturization, low profile, and bandwidth. Large and high gain performance.
  • the orthographic projections of the plurality of metasurface units 31 toward the first ground layer 11 are symmetrically arranged with respect to the geometric center of the clearance gap 111, so as to achieve The purpose of further increasing the bandwidth of the metasurface antenna system 100.
  • the shape of the clearance gap 111 is not limited, and its main purpose is to couple with the signal line 14 and generate a low-frequency resonance signal.
  • the signal line 14 extends along the first direction.
  • the clearance gap 111 includes a first gap 1111 extending in the second direction, and the first gap 1111 spans the signal line 14 to form a gap-coupled power feeding manner.
  • the first direction is perpendicular to the second direction, that is, the first direction in the figure is the X-axis direction, and the second direction is the Y-axis direction.
  • the clearance gap 111 further includes the opposite ends of the first gap 1111 extending in the first direction.
  • the shape of the clearance gap 111 is not limited to this, but the principle is the same.
  • the metasurface antenna system 100 is formed by a plurality of the antenna units 10 arranged in a row and spliced together.
  • the metasurface antenna system 100 is formed by four antenna units 10 arranged in a row and spliced together.
  • it is not limited to four antenna units 10, and it can also be 2, 6, 8, or 3, 5, 7, etc., which are all feasible.
  • a plurality of the antenna units 10 are arranged in sequence along the first direction.
  • the performance curve of the metasurface antenna system of the present invention where curve group a is the S parameter curve of four antenna units 10, curve group b is the isolation between adjacent antenna units 10, curve c It is the composite axial direction gain of the metasurface antenna system 100. It can be seen that the metasurface antenna system 100 can simultaneously cover the n257 (26.5GHz-29.5GHz) frequency, the n258 (24.25-27.5GHz) frequency band, and the n261 (27.5-28.35GHz) frequency band, with a wide coverage range and better performance.
  • the present invention also provides a communication terminal 200, which includes the above-mentioned metasurface antenna system 100 provided by the present invention.
  • FIG. 5 it is a schematic diagram of the structure of the metasurface antenna system of the present invention applied to the side of the communication terminal of the present invention.
  • the communication terminal 200 includes a housing 201 and a frame 202 surrounding the housing 201.
  • the two metasurface antenna systems 100 are installed on opposite sides of the frame 202, respectively.
  • FIG. 7 it is a schematic diagram of the structure of the metasurface antenna system of the present invention applied to the back of the communication terminal of the present invention.
  • the communication terminal 300 includes a housing 301 and a frame 302 surrounding the housing 301.
  • a clearance gap is provided in the first ground layer of the strip line unit, and the signal line and the clearance gap form a coupling feed through the gap above the clearance gap.
  • the metasurface array antenna is symmetrically loaded to make the clearance gap and the metasurface array antenna form a coupling feed.
  • the signal line couples the radiated signal to the clearance gap, causing the clearance gap to generate low-frequency resonance, and then couples the clearance gap to the metasurface array antenna.
  • the array antenna generates high-frequency resonance, thereby achieving the purpose of increasing the bandwidth, which can simultaneously cover the n257, n258 and n261 standard frequency bands of 5G millimeter waves; and the metasurface array antenna itself has special electromagnetic characteristics, which makes the metasurface antenna system small Optimized, low profile, large bandwidth and high gain performance.

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Abstract

本发明提供一种超表面天线系统，包括依次叠设的带状线单元、第一基材层和超表面阵列天线，带状线单元包括相互间隔的第一接地层和第二接地层、以及间隔设于二者之间的信号线；第一接地层设有贯穿其上的净空缝隙，净空缝隙与信号线形成耦合馈电；超表面阵列天线包括多个相互间隔且呈矩阵排布的超表面单元，每一超表面单元均与净空缝隙形成耦合馈电；信号线用于连接辐射信号并将该辐射信号耦合至净空缝隙，净空缝隙再将该辐射信号耦合至超表面单元。本发明还提供一种通讯终端。与相关技术相比，本发明超表面天线系统及通讯终端带宽覆盖范围广且剖面低。

Description

超表面天线系统及通讯终端 技术领域
本发明涉及一种通讯技术领域，尤其涉及一种超表面天线系统及通讯终端。
 背景技术
随着移动通讯技术的发展，手机、PAD、笔记本电脑等逐渐成为生活中不可或缺的电子产品，并且该类电子产品都更新为增加天线系统使其具有通讯功能的电子通讯产品。
5G作为全球业界的研发焦点，其中，毫米波天线因具有的高载频、大带宽特性是实现5G超高数据传输速率的主要保障。
 技术问题
然而，相关技术的毫米波天线往往采用贴片天线设计，或双层贴片天线设计，并采用探针馈电。贴片天线设计带宽较窄，叠层贴片设计可有效增加带宽，但不可避免会增加天线剖面。上述两种方法得到的天线带宽往往只能覆盖n257 (26.5GHz - 29.5GHz) 与n261(27.5GHz - 28.35GHz)频段，很难同时覆盖 n258(24.25 GHz - 27.5GHz)。
因此，有必要提供一种新的超表面天线系统及通讯终端解决上述问题。
 技术解决方案
本发明需要解决的技术问题是提供一种带宽覆盖范围广且剖面低的超表面天线系统及通讯终端。
为解决上述技术问题，本发明提供了一种超表面天线系统，所述超表面天线系统包括天线单元，所述天线单元包括：
带状线单元，所述带状线单元包括相互间隔正对设置的第一接地层和第二接地层、连接所述第一接地层和所述第二接地层的连接块以及间隔设于所述第一接地层和所述第二接地层之间的信号线；所述第一接地层设有贯穿其上的净空缝隙，所述净空缝隙与所述信号线形成耦合馈电；
第一基材层，所述第一基材层叠设于第一接地层远离所述第二接地层的一侧；
超表面阵列天线，所述超表面阵列天线叠设于所述第一基材层远离所述第一地层的一侧，所述超表面阵列天线包括多个相互间隔且呈矩阵排布的超表面单元，每一所述超表面单元均与所述净空缝隙形成耦合馈电。
优选的，多个所述超表面单元向所述第一接地层方向的正投影关于所述净空缝隙的几何中心呈对称设置。
优选的，所述信号线沿第一方向延伸，所述净空缝隙包括沿第二方向延伸的第一缝隙，所述第一缝隙横跨所述信号线，其中，所述第一方向垂直于所述第二方向。
优选的，所述净空缝隙还包括由所述第一缝隙的相对两端分别沿所述第一方向延伸的第二缝隙。
优选的，所述带状线单元还包括夹设于所述第一接地层和所述第二接地层之间的多个第一接地柱和多个第二接地柱；多个所述第一接地柱环绕于所述净空缝隙设置，多个所述第二接地柱分设于所述信号线的两侧。
优选的，所述带状线单元还包括夹设于所述第一接地层和所述第二接地层之间的第二基材层，所述信号线嵌设于所述第二基材层内。
优选的，所述超表面天线系统由多个所述天线单元依次排呈一列并拼接形成。
优选的，多个所述天线单元沿所述第一方向依次排列。
优选的，所述超表面阵列天线包括四个所述超表面单元并呈2*2阵列排布。
本发明还提供一种通讯终端，其包括本发明提供的上述超表面天线系统。
 有益效果
与相关技术相比，本发明的超表面天线系统及通讯终端中，在带状线单元的第一接地层设置净空缝隙，并使信号线与该净空缝隙形成耦合馈电，通过在净空缝隙上方对称加载超表面阵列天线，使净空缝隙与超表面阵列天线形成耦合馈电，信号线将辐射信号耦合至净空缝隙，使得净空缝隙产生低频谐振，再由净空缝隙耦合至超表面阵列天线，超表阵列天线产生高频谐振，从而实现了增加带宽的目的，可以同时覆盖5G毫米波的n257，n258与n261标准频带；而超表面阵列天线自身具有特殊的电磁特性 ，从而使得超表面天线系统实现小型化、低剖面、带宽大且高增益性能。
 附图说明
为了更清楚地说明本实用新型实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本实用新型的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图，其中：
图1为本发明超表面天线系统的结构示意图；
图2为本发明超表面天线系统其中一天线单元立体结构分解示意图；
图3为图2中天线单元的带状线单元的部分结构示意图；
图4为本发明超表面天线系统的性能曲线图；
图5为本发明通讯终端侧边运用本发明的超表面天线系统的结构示意图；
图6为图5通讯终端的天线增益曲线图；
图7为本发明通讯终端背面运用本发明的超表面天线系统的结构示意图；
图8为图7通讯终端的天线增益曲线图。
 本发明的实施方式
下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本实用新型的一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本实用新型保护的范围。
请同时参图1-3所示，本发明提供了一种超表面天线系统100，所述超表面天线系统100包括天线单元10，所述天线单元10包括由下向上依次叠设的带状线单元1、第一基材层2、超表面阵列天线3。
所述带状线单元1包括相互间隔正对设置的第一接地层11和第二接地层12以及间隔设于所述第一接地层11和所述第二接地层12之间的信号线14。即所述信号线14位于第一接地层11和第二接地层12之间，且分别与第一接地层11和第二接地层12形成间隔设置。
所述第一接地层11设有贯穿其上的净空缝隙111，所述净空缝隙与所述信号线14形成耦合馈电。
也就是说，所述信号线14、所述第一接地层11及所述第二接地层12共同形成的带状线结构，该带状线结构用于传输辐射信号并将该辐射信号耦合至所述净空缝隙111，所述净空缝隙111再将该辐射信号耦合至所述超表面阵列天线3。
具体的，所述净空缝隙111用于将耦合到的所述信号线14、所述第一接地层11及所述第二接地层12共同形成的带状线结构所传输的辐射信号以产生低频谐振信号，并将该低频谐振信号耦合至超表面阵列天线3，从而产生高频谐振信号。
所述第一基材层2叠设于第一接地层11远离所述第二接地层12的一侧。所述超表面阵列天线3叠设于所述第一基材层2远离所述第一地层11的一侧。即所述带状线单元1与所述超表面阵列天线3分别贴设于所述第一基材层2的相对两侧，从而对所述第一基材层2将所述带状线单元1与超表面阵列天线3形成间隔设置。
本实施方式中，所述带状线单元1还包括夹设于所述第一接地11和所述第二接地层12之间的多个第一接地柱15和多个第二接地柱16。
多个所述第一接地柱15环绕于所述净空缝隙111设置，多个所述第二接地柱16分设于所述信号线14的两侧。所述第一接地柱15和所述第二接地柱16可同时设置，也可单独设置，该设置进一步增强了天线单元10之间隔离，从而进一步提高整个超表面天线系统100的带宽。
本实施方式中，多个所述第一接地柱15相互间隔并共同围形矩形结构，以将所述净空缝隙111围设在内。多个所述第二接地柱16相互间隔排列并沿信号线14由所述连接块13延伸至所述第一接地柱15围成的空间内。
进一步的，所述带状线单元1还包括夹设于所述第一接地层11和所述第二接地层12之间的第二基材层17，所述信号线14嵌设于所述第二基材层12内，从而实现信号线14悬空设置于第一接地层11和第二接地层12之间，以便形成带状线结构并与净空缝隙111形成耦合馈电。当然，也可以通过设置其它结构使实现信号线14悬空设置于第一接地层11和第二接地层12之间，比如通过在第一接地层11或第二接地层12之间设置多层基材层，并由其中某一基材层支撑信号线14。
所述超表面阵列天线3包括多个相互间隔且呈矩阵排布的超表面单元31，每一所述超表面单元31均与所述净空缝隙111形成耦合馈电。所述超表面阵列天线3与净空缝隙111耦合并产生高频谐振信号。
本实施方式中，更优的，所述超表面阵列天线3包括四个所述超表面单元31并呈2*2阵列排布。当然，也可为十六个所述超表面单元31并呈4*4阵列排布，或更多。
超表面阵列天线3是超材料的二维体现形式，由周期型超表面单元（贴片）排列而成，由于其具有特殊的电磁特性 ，从而使得超表面天线系统实现小型化、低剖面、带宽大且高增益性能。
本实施方式中，所述超表面阵列天线3中，多个所述超表面单元31向所述第一接地层11方向的正投影关于所述净空缝隙111的几何中心呈对称设置，从而可实现进一步增加超表面天线系统100带宽的目的。
所述净空缝隙111的形状不限，其主要目的是为了与信号线14的耦合并生成低频谐振信号。
本实施方式中，所述信号线14沿第一方向延伸。所述净空缝隙111包括沿第二方向延伸的第一缝隙1111，所述第一缝隙1111横跨所述信号线14，从而形成缝隙耦合的馈电方式。其中，所述第一方向垂直于所述第二方向，即图中第一方向为X轴方向 ，第二方向为Y轴方向。
为了可实现净空缝隙111的阻抗调节，以便更灵活的实现不同带宽频段，本实施方式中，所述净空缝隙111还包括由所述第一缝隙1111的相对两端分别沿所述第一方向延伸的第二缝隙1112。从而，本实施方式中，所述净空缝隙111由所述第一缝隙1111和第二缝隙1112形成“H”型结构。当然，所述净空缝隙111的形状不限于此，但其原理一样。
本实施方式中，所述超表面天线系统100由多个所述天线单元10依次排呈一列并拼接形成。比如，所述超表面天线系统100由四个天线单元10依次排列呈一列并拼接形成。当然不限于四个天线单元10，也可以为2个6个、8个或3个、5个、7个等，这都是可行的。
更优的，多个所述天线单元10沿所述第一方向依次排列。
如图4所示，本发明超表面天线系统的性能曲线图，其中，曲线组a为四个天线单元10的S参数曲线，曲线组b为相邻天线单元10之间的隔离度，曲线c为超表面天线系统100的合成轴向方向增益。可知，超表面天线系统100可实现同时覆盖n257（26.5GHz-29.5GHz）频，n258（24.25-27.5GHz）频段, 和n261（27.5-28.35GHz）频段，覆盖范围广，性能更好。
本发明还提供一种通讯终端200，其包括本发明提供的上述超表面天线系统100。
如图5所示，为本发明通讯终端侧边运用本发明的超表面天线系统的结构示意图。所述通讯终端200包括壳体201和环设于所述壳体201的边框202，将2个所述超表面天线系统100分别安装于所述边框202的相对两侧。其天线对应CDF（累积分布函数）=50%的增益及最大增益如图6所示，可见，该超表面天线系统100使得通讯终端200的辐射信号强且覆盖范围广。
如图7所示，为本发明通讯终端背面运用本发明的超表面天线系统的结构示意图。
所述通讯终端300包括壳体301和环设于所述壳体301的边框302，将一个所述超表面天线系统100安装于所述壳体301，其天线对应CDF=50%的增益及最大增益如图8所示，可见，该超表面天线系统100使得通讯终端300的辐射信号强且覆盖范围广。
与相关技术相比，本发明的超表面天线系统及通讯终端中，在带状线单元的第一接地层设置净空缝隙，并使信号线与该净空缝隙形成耦合馈电，通过在净空缝隙上方对称加载超表面阵列天线，使净空缝隙与超表面阵列天线形成耦合馈电，信号线将辐射信号耦合至净空缝隙，使得净空缝隙产生低频谐振，再由净空缝隙耦合至超表面阵列天线，超表阵列天线产生高频谐振，从而实现了增加带宽的目的，可以同时覆盖5G毫米波的n257，n258与n261标准频带；而超表面阵列天线自身具有特殊的电磁特性 ，从而使得超表面天线系统实现小型化、低剖面、带宽大且高增益性能。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其它相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (10)

  1. 一种超表面天线系统，其特征在于，所述超表面天线系统包括天线单元，所述天线单元包括：
    带状线单元，所述带状线单元包括相互间隔正对设置的第一接地层和第二接地层以及间隔设于所述第一接地层和所述第二接地层之间的信号线；所述第一接地层设有贯穿其上的净空缝隙，所述净空缝隙与所述信号线形成耦合馈电；
    第一基材层，所述第一基材层叠设于第一接地层远离所述第二接地层的一侧；
    超表面阵列天线，所述超表面阵列天线叠设于所述第一基材层远离所述第一地层的一侧，所述超表面阵列天线包括多个相互间隔且呈矩阵排布的超表面单元，每一所述超表面单元均与所述净空缝隙形成耦合馈电。
  2. 根据权利要求1所述的超表面天线系统，其特征在于，多个所述超表面单元向所述第一接地层方向的正投影关于所述净空缝隙的几何中心呈对称设置。
  3. 根据权利要求1所述的超表面天线系统，其特征在于，所述信号线沿第一方向延伸，所述净空缝隙包括沿第二方向延伸的第一缝隙，所述第一缝隙横跨所述信号线，其中，所述第一方向垂直于所述第二方向。
  4. 根据权利要求3所述的超表面天线系统，其特征在于，所述净空缝隙还包括由所述第一缝隙的相对两端分别沿所述第一方向延伸的第二缝隙。
  5. 根据权利要求1所述的超表面天线系统，其特征在于，所述带状线单元还包括夹设于所述第一接地层和所述第二接地层之间的多个第一接地柱和多个第二接地柱；多个所述第一接地柱环绕于所述净空缝隙设置，多个所述第二接地柱分设于所述信号线的两侧。
  6. 根据权利要求5所述的超表面天线系统，其特征在于，所述带状线单元还包括夹设于所述第一接地层和所述第二接地层之间的第二基材层，所述信号线嵌设于所述第二基材层内。
  7. 根据权利要求3所述的超表面天线系统，其特征在于，所述超表面天线系统由多个所述天线单元依次排呈一列并拼接形成。
  8. 根据权利要求7所述的超表面天线系统，其特征在于，多个所述天线单元沿所述第一方向依次排列。
  9. 根据权利要求1所述的超表面天线系统，其特征在于，所述超表面阵列天线包括四个所述超表面单元并呈2*2阵列排布。
  10. 一种通讯终端，其特征在于，其包括如权利要求1-9任意一项所述的超表面天线系统。
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