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WO2013167075A2 - 一种天线系统 - Google Patents

一种天线系统 Download PDF

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Publication number
WO2013167075A2
WO2013167075A2 PCT/CN2013/079995 CN2013079995W WO2013167075A2 WO 2013167075 A2 WO2013167075 A2 WO 2013167075A2 CN 2013079995 W CN2013079995 W CN 2013079995W WO 2013167075 A2 WO2013167075 A2 WO 2013167075A2
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
antennas
antenna system
isolation layer
ring
Prior art date
Application number
PCT/CN2013/079995
Other languages
English (en)
French (fr)
Other versions
WO2013167075A3 (zh
Inventor
马金萍
孙飞飞
刘洋
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP13787447.5A priority Critical patent/EP2947715A4/en
Priority to US14/763,274 priority patent/US20150364817A1/en
Publication of WO2013167075A2 publication Critical patent/WO2013167075A2/zh
Publication of WO2013167075A3 publication Critical patent/WO2013167075A3/zh

Links

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
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • 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
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • 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
    • H01Q1/526—Electromagnetic shields
    • 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
    • H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems

Definitions

  • the utility model relates to a terminal antenna technology, in particular to an antenna system provided with a left-handed material.
  • the antenna's performance and size are directly related to the advantages and disadvantages of wireless communication products.
  • multi-antenna systems have become the mainstream of market applications.
  • the interference formed between the multiple antennas in the communication products has become an urgent problem to be solved in the antenna design.
  • One of the common antenna design methods is to design multiple antennas at both ends of the communication product, and increase the isolation of multiple antennas by spatial distance to reduce interference.
  • the spatial distance will increase the size of the antenna system.
  • the main object of the embodiments of the present invention is to provide an antenna system capable of effectively improving the isolation between multiple antennas.
  • the embodiment of the present invention provides an antenna system, where the antenna system includes: two upper antennas, and a left-hand material isolation layer;
  • the left hand material isolation layer is suspended between two adjacent antennas of the two or more antennas.
  • the left hand material comprises: copper, stainless steel.
  • the antenna system further includes: a feeding system configured separately for each antenna And matching circuits; the antennas are respectively connected to respective feeding systems through respective matching circuits.
  • the antenna system further includes a printed circuit board PCB; each antenna and its corresponding feeding system and matching circuit are printed in the PCB.
  • the left-hand material isolation layer is composed of an array of metal wires or metal-opened resonant rings disposed in the PCB.
  • the resonant frequency of the left-hand material isolation layer is the same as the operating frequency of the two or more antennas.
  • the antenna is a monopole antenna or a dipole antenna.
  • the left-hand material isolation layer is suspended between two adjacent antennas of the two or more antennas: the left-hand material isolation layer is located between two adjacent antennas, is not grounded, and is not fed. .
  • the metal-opening resonant ring is composed of two concentric rings; wherein the outer ring and the inner ring in the concentric ring are provided with openings, and the openings on the outer ring and the inner ring are different in orientation. .
  • the metal-opening resonant ring is composed of two concentric rings; wherein the outer ring and the inner ring in the concentric ring are provided with openings, and the openings on the outer ring and the inner ring are opposite in orientation .
  • the antenna system provided by the embodiment of the present invention can reduce the coupling between the antennas by hanging the left-hand material isolation layer between two adjacent antennas, thereby improving the isolation between the antennas.
  • FIG. 1 is a schematic structural view of an antenna system according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a left-hand material isolation layer according to an embodiment of the present invention
  • FIG. 3 is a comparison diagram of isolation in the embodiment of the present invention.
  • the antenna system of the embodiment of the present invention includes: two or more antennas, and a left-hand material isolation layer;
  • the left-hand material isolation layer is disposed between two adjacent antennas and is suspended; wherein the floating placement means that the left-hand material isolation layer is neither grounded nor fed, so as to be An insulating layer between the antennas;
  • the antenna system further includes a feed system and a matching circuit respectively configured for each antenna; the two or more antennas are respectively connected to respective feed systems through respective matching circuits.
  • the left-hand material isolation layer is configured to serve as an insulating layer between the antennas; specifically, the left-hand material isolation layer functions to change an electromagnetic wave signal received by the antenna or an electromagnetic wave signal emitted by the antenna. The function, in turn, weakens the coupling of the electromagnetic wave signals between the antennas.
  • the antenna system of the embodiment of the present invention further includes a printed circuit board (PCB); each antenna and its corresponding feeding system and matching circuit are printed in the PCB.
  • PCB printed circuit board
  • the left-hand material is any metal material such as copper, stainless steel, etc.; the left-hand material isolation layer is composed of an array of metal wires or metal-opening resonant rings disposed in the PCB.
  • the antenna system further includes: a feeding system configured for each antenna, and a matching circuit configured for each antenna; the two or more antennas are respectively connected to the feeding system through respective matching circuits;
  • the antenna may be a monopole antenna or a dipole antenna or the like;
  • the feeding system is configured to provide a feeding to the antenna
  • the matching circuit is configured to be used for matching and debugging of the antenna;
  • the antenna system further includes a PCB configured to print an antenna, a feeding system, and a matching circuit.
  • the number of the left-hand material isolation layers may be configured according to the number of the antennas such that the left-hand material isolation layer is provided as an insulating layer between any two antennas.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the antenna system includes: a first antenna 11 , a second antenna 12 , and a first feeding system 13 configured for the first antenna 11 .
  • a second feeding system 14 configured for the second antenna 12, a first matching circuit 15 configured for the first antenna 11, a second matching circuit 16 configured for the second antenna 12, a PCB 17, and a left-hand material isolation layer 18;
  • the first antenna 11 is connected to the first power feeding system 13 through the first matching circuit 15; the first antenna 11 is located at the left end of the clearance area 171 above the PCB 17; the first antenna 11 is a monopole sawtooth antenna Wherein, one end of the first antenna 11 is connected to the first matching circuit 15, and the other end is not connected to any device;
  • the second antenna 12 is connected to the second feeding system 14 through the second matching circuit 16; the second antenna 12 is located at the right end of the clearance area 171 above the PCB 17; the second antenna 12 is a monopole linear antenna Wherein, one end of the second antenna 12 is connected to the second matching circuit 16, and the other end is not connected to any device.
  • the first antenna 11 and the second antenna 12 are placed in parallel at both ends of the clearance area 171.
  • the left-hand material isolation layer 18 is suspended and located between the first antenna 11 and the second antenna 12 and is parallel to the first antenna 11 and the second antenna 12; here, the suspended placement refers to the left-hand material isolation layer. Not grounded or fed. Before the left hand material isolation layer 18 is disposed, the shape of the left hand material isolation layer 18 needs to be determined such that the left hand material isolation layer 18 has the same or similar frequency as the first antenna 11 and the second antenna 12, thereby forming the left hand material isolation layer.
  • the propagation direction of the electromagnetic wave received or transmitted by the first antenna 11 and the propagation direction of the electromagnetic wave received or transmitted by the second antenna 12 can be effectively changed, thereby reducing the first antenna 11
  • the electromagnetic wave coupling with the second antenna 12 increases the isolation between the two antennas.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the left-hand material isolation layer in this embodiment is composed of a metal open resonant ring unit, wherein each resonant ring unit is composed of two A concentric annular band of different diameters is formed, and an opening 211 is disposed below the outer ring 21, so that the outer ring is no longer continuous and becomes a segment band; an opening 221 is disposed above the inner ring 22, so that the inner ring is no longer
  • the opening direction of the outer opening 211 is opposite to the opening orientation of the inner opening 221, or the opening orientation of the outer opening 211 is different from the opening orientation of the inner opening 221.
  • the isolation effect of the left-hand material isolation layer is optimal; when the opening orientation of the outer opening 211 is different from the opening orientation of the inner opening 221 and is not opposite, the left hand The isolation of the material barrier is relatively poor.
  • a left-handed material By arranging the resonant ring units vertically in an array, a left-handed material can be formed; selecting a certain number of resonant ring units according to actual conditions can make the resonant frequency of the left-handed material the same or similar to the working frequency of the antenna, and then serve as a left hand. Material barrier.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the PCB is selected from 8 layers, and the specification of each layer is 22 x 100 mm 2 ; the operating frequency of the first antenna is 2300 MHz - 2400 MHz, which is used to support LTE signals.
  • the second antenna operates at a frequency of 2.4 GHz for supporting the WIFI signal; the first antenna and the second antenna are separated by one-eighth of a wavelength.
  • the left-hand material isolation layer uses four array-shaped resonant ring units, and the upper clearance area of each layer of the PCB adopts such an array-shaped resonant ring unit. Therefore, eight layers of four array-shaped resonant ring units are used as the present.
  • the left-hand material isolation layer in the embodiment preferably, the resonant ring unit is made of a copper material, the inner copper ring has a diameter of 2.12 mm, the outer copper ring has a diameter of 4.24 mm, the inner opening width is 1.06 mm, and the outer opening width is 1.06 mm;
  • the resonant frequency of the left-hand material isolation layer is 2.4 GHz, which is the same as the frequencies of the first antenna and the second antenna.
  • the isolation between the left-hand material isolation layer and the left-hand material isolation layer is not shown in Figure 3.
  • the dotted line indicates the relationship between the isolation and the frequency when the left-hand material isolation layer is not set.
  • the isolation is 6 dB; the solid line indicates the relationship between the isolation and the frequency when the left-hand material isolation layer is set.
  • the isolation is about 27 dB, and when the left-hand material isolation layer is not provided.
  • the isolation of the left-hand material isolation layer is improved by nearly 21dB, which effectively reduces the coupling between the two antennas.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)

Abstract

本实用新型公开了一种天线系统，包括：两个以上天线、以及左手材料隔离层；其中，所述左手材料隔离层悬空设置于所述两个以上天线中相邻的两天线之间。采用本实用新型提供的天线系统，可以通过左手材料隔离层削弱天线之间的耦合作用，提高了天线之间的隔离度。

Description

一种天线系统 技术领域
本实用新型涉及终端天线技术， 尤其涉及一种设置有左手材料的天线 系统。 背景技术
天线作为无线通信产品的重要元件之一， 其性能与尺寸的大小直接关 系到无线通信产品的优劣。 随着通信产品对信号强度的要求越来越高， 多 天线系统已经成为市场应用的主流。 而多天线之间在通信产品中形成的干 扰， 成为了天线设计亟需解决的问题。
常见的天线设计方法之一是将多天线设计于通信产品的两端， 通过空 间距离来增加多个天线的隔离度， 以降低干扰， 但是， 空间距离会使天线 系统的尺寸变大， 有悖于天线系统微型化的发展趋势。 发明内容
有鉴于此， 本实用新型实施例的主要目的在于提供一种天线系统， 能 够有效提高多天线之间的隔离度。
为达到上述目的， 本实用新型实施例的技术方案是这样实现的： 本实用新型实施例提供了一种天线系统， 所述天线系统包括： 两个以 上天线、 以及左手材料隔离层； 其中，
所述左手材料隔离层悬空设置于所述两个以上天线中相邻的两天线之 间。
上述方案中， 所述左手材料包括： 铜、 不锈钢。
上述方案中， 所述天线系统还包括： 为每个天线分别配置的馈电系统 及匹配电路； 所述天线分别通过各自的匹配电路连接至各自的馈电系统。 上述方案中， 所述天线系统还包括印刷电路板 PCB; 各天线及其对应 的馈电系统、 匹配电路被印刷于所述 PCB中。
上述方案中， 所述左手材料隔离层由设置于 PCB中的阵列状排列的金 属线或金属开口谐振环构成。
上述方案中， 所述左手材料隔离层的谐振频率与所述两个以上天线的 工作频率相同。
上述方案中， 所述天线为单极子天线、 或偶极子天线。
上述方案中， 所述左手材料隔离层悬空设置于所述两个以上天线中相 邻的两天线之间为： 所述左手材料隔离层位于邻近的两个天线之间， 不接 地且不馈电。
上述方案中， 所述金属开口谐振环由两个同心圓环组成； 其中， 同心 圓环中的外圓环及内圓环上均设置有开口， 外圓环及内圓环上的开口方位 不同。
上述方案中， 所述金属开口谐振环由两个同心圓环组成； 其中， 同心 圓环中的外圓环及内圓环上均设置有开口， 外圓环及内圓环上的开口方位 相反。
本实用新型实施例提供的天线系统， 通过将左手材料隔离层悬空放置 于相邻的两个天线之间， 可以削弱天线之间的耦合作用， 提高了天线之间 的隔离度。 附图说明
图 1为本实用新型实施例天线系统的结构组成示意图；
图 2为本实用新型实施例左手材料隔离层的结构组成示意图； 图 3为本实用新型实施例中隔离度的对比图。 具体实施方式
为了能够更加详尽地了解本实用新型的特点与技术内容， 下面结合附 图对本实用新型实施例的实现进行详细阐述， 所附附图仅供参考说明之用， 并非用来限定本实用新型。
本实用新型实施例的天线系统包括： 两个以上天线、 以及左手材料隔 离层； 其中，
所述左手材料隔离层设置于相邻的两个所述天线之间， 且悬空放置； 这里， 所述悬空放置是指所述左手材料隔离层既不接地也不馈电， 以 便能作为所述天线之间的绝缘层；
所述天线系统还包括为每个天线分别配置的馈电系统及匹配电路； 所 述两个以上天线分别通过各自的匹配电路连接至各自的馈电系统。
所述左手材料隔离层， 用于充当所述天线之间的绝缘层； 具体地， 所 述左手材料隔离层起着改变所述天线接收到的电磁波信号或所述天线发射 的电磁波信号传播方向的作用， 进而削弱天线之间电磁波信号的耦合作用。
本实用新型实施例的天线系统还包括印刷电路板 ( PCB, Printed Circuit Board ); 各天线及其对应的馈电系统、 匹配电路被印刷于所述 PCB中。
所述左手材料为任意一种金属材料， 比如： 铜、 不锈钢等； 所述左手 材料隔离层由设置于 PCB 中的阵列状排列的金属线或金属开口谐振环构 成。
优选地， 所述天线系统还包括： 为每个天线配置的馈电系统、 以及为 每个天线配置的匹配电路； 所述两个以上天线分别通过各自的匹配电路连 接至馈电系统；
所述天线可以是单极子天线或偶极子天线等；
所述馈电系统， 配置为提供馈电给所述天线；
所述匹配电路， 配置为供所述天线匹配调试使用； 优选地， 所述天线系统还包括配置为印刷天线、 馈电系统以及匹配电 路的 PCB。
在实际应用时， 所述左手材料隔离层的数量可根据所述天线的数量来 配置， 以便任意两个天线之间都具有所述左手材料隔离层作为绝缘层。
实施例一：
本实施例应用在具有无线保真 （WIFI， Wireless Fidelity ) 功能的长期 演进（ LTE， Long Term Evolution ) 系统的数据卡时， 在数据卡上设置左手 材料隔离层、 以及构成天线的绝缘层。 图 1 为本实施例的天线系统的结构 组成示意图， 如图 1所示， 所述天线系统包括： 第一天线 11、 第二天线 12、 为第一天线 11配置的第一馈电系统 13、 为第二天线 12配置的第二馈电系 统 14、 为第一天线 11配置的第一匹配电路 15、 为第二天线 12配置的第二 匹配电路 16、 PCB 17、 左手材料隔离层 18; 其中，
所述第一天线 11通过第一匹配电路 15与第一馈电系统 13连接； 所述 第一天线 11位于 PCB 17上方净空区 171的左端； 所述第一天线 11为单极 子锯齿状天线； 其中， 所述第一天线 11的一端连接至第一匹配电路 15， 另 一端不连接任何器件；
所述第二天线 12通过第二匹配电路 16与第二馈电系统 14连接； 所述 第二天线 12位于 PCB 17上方净空区 171的右端； 所述第二天线 12为单极 子线状天线； 其中， 所述第二天线 12的一端连接至第二匹配电路 16， 另一 端不连接任何器件。
上述方案中， 所述第一天线 11和第二天线 12平行放置于净空区 171 的两端。
所述左手材料隔离层 18悬空放置， 位于第一天线 11和第二天线 12之 间且与第一天线 11和第二天线 12平行； 这里， 所述悬空放置是指所述左 手材料隔离层既不接地也不馈电。 在设置左手材料隔离层 18之前， 需要确定左手材料隔离层 18的形状， 使左手材料隔离层 18具有和第一天线 11及第二天线 12相同或相近的频率， 从而在所述左手材料隔离层 18放置在第一天线 11和第二天线 12之间后， 可以有效改变第一天线 11接收或发射电磁波的传播方向，以及第二天线 12 接收或发射电磁波的传播方向， 从而降低第一天线 11与第二天线 12之间 的电磁波耦合， 提高两个天线之间的隔离度。
实施例二：
图 2为本实施例的左手材料隔离层的结构组成示意图， 如图 2所示， 本实施例中的左手材料隔离层以金属开口谐振环为单元所组成， 其中， 每 个谐振环单元由两个不同直径的同心圓环带组成， 在外圓环 21的下方设置 有开口 211， 使得外环不再连续， 成为段带状； 在内圓环 22的上方设置有 开口 221， 使得内环不再连续， 成为段带状； 所述外开口 211的开口方位与 内开口 221的开口方位相反、 或者外开口 211的开口方位与内开口 221的 开口方位不同。
这里， 当外开口 211 的开口方位与内开口 221 的开口方位相反时， 左 手材料隔离层的隔离效果最佳； 当外开口 211 的开口方位与内开口 221 的 开口方位不同且未相反时， 左手材料隔离层的隔离效果相对较差。
通过将所述谐振环单元阵列状地垂直排列， 便可构成左手材料； 根据 实际情况选择一定数目的谐振环单元可以使得所述左手材料的谐振频率与 天线的工作频率相同或相近， 进而作为左手材料隔离层。
实施例三：
结合实施例一及实施例二中的基于左手材料的天线系统， PCB选用 8 层板， 每层板的规格为 22x 100mm2 ; 第一天线的工作频率为 2300 MHz-2400MHz， 用于支持 LTE信号； 第二天线的工作频率为 2.4GHz， 用 于支持 WIFI信号； 所述第一天线和第二天线之间间隔八分之一波长。 左手材料隔离层选用四个阵列状排列的谐振环单元， 每层 PCB的上方 净空区都采用这样的阵列状排列的谐振环单元， 因此， 采用 8 层四个阵列 状排列的谐振环单元作为本实施例中的左手材料隔离层； 优选地， 所述谐 振环单元的采用铜制材料， 内铜环直径为 2.12mm， 外铜环直径为 4.24mm， 内开口宽度为 1.06mm， 外开口宽度为 1.06mm; 如此， 所述左手材料隔离 层的谐振频率为 2.4GHz， 与第一天线和第二天线的频率相同。
采用上述参数， 未设置左手材料隔离层与设置左手材料隔离层时的隔 离度对比情况如图 3 所示， 虚线表示未设置左手材料隔离层时的隔离度和 频率之间的关系， 在频率为 2.4GHz时， 隔离度为 6dB; 实线表示设置左手 材料隔离层时的隔离度和频率之间的关系， 在频率为 2.4GHz时， 隔离度为 27dB左右， 与未设置左手材料隔离层时的隔离度相比， 设置左手材料隔离 层时的隔离度提升了近 21dB， 有效降低了两个天线之间的耦合度。
以上所述， 仅为本实用新型的较佳实施例而已， 并非用于限定本实用 新型的保护范围。

Claims

权利要求书
1、 一种天线系统， 所述天线系统包括： 两个以上天线、 以及左手材料 隔离层； 其中，
所述左手材料隔离层悬空设置于所述两个以上天线中相邻的两天线之 间。
2、 根据权利要求 1所述的天线系统， 其中， 所述左手材料包括： 铜、 不锈钢。
3、 根据权利要求 1所述的天线系统， 其中， 所述天线系统还包括： 为 每个天线分别配置的馈电系统及匹配电路； 所述天线分别通过各自的匹配 电路连接至各自的馈电系统。
4、 根据权利要求 3所述的天线系统， 其中， 所述天线系统还包括印刷 电路板 PCB;各天线及其对应的馈电系统、匹配电路被印刷于所述 PCB中。
5、 根据权利要求 4所述的天线系统， 其中， 所述左手材料隔离层由设 置于 PCB中的阵列状排列的金属线或金属开口谐振环构成。
6、 根据权利要求 1所述的天线系统， 其中， 所述左手材料隔离层的谐 振频率与所述两个以上天线的工作频率相同。
7、 根据权利要求 1所述的天线系统， 其中， 所述天线为单极子天线、 或偶极子天线。
8、 根据权利要求 1所述的天线系统， 其中， 所述左手材料隔离层悬空 设置于所述两个以上天线中相邻的两天线之间为： 所述左手材料隔离层位 于邻近的两个天线之间， 不接地且不馈电。
9、 根据权利要求 5所述的天线系统， 其中， 所述金属开口谐振环由两 个同心圓环组成； 其中， 同心圓环中的外圓环及内圓环上均设置有开口， 外圓环及内圓环上的开口方位不同。
10、 根据权利要求 5 所述的天线系统， 其中， 所述金属开口谐振环由 两个同心圓环组成； 其中， 同心圓环中的外圓环及内圓环上均设置有开口， 外圓环及内圓环上的开口方位相反。
PCT/CN2013/079995 2013-01-28 2013-07-24 一种天线系统 WO2013167075A2 (zh)

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