WO2021119942A1 - 传输线以及终端设备 - Google Patents

传输线以及终端设备 Download PDF

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Publication number
WO2021119942A1
WO2021119942A1 PCT/CN2019/125709 CN2019125709W WO2021119942A1 WO 2021119942 A1 WO2021119942 A1 WO 2021119942A1 CN 2019125709 W CN2019125709 W CN 2019125709W WO 2021119942 A1 WO2021119942 A1 WO 2021119942A1
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Prior art keywords
transmission line
grounding
wires
ground
signal
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PCT/CN2019/125709
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English (en)
French (fr)
Inventor
詹大伟
陈勇利
何家勇
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声科技(新加坡)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.)
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Application filed by 瑞声声学科技(深圳)有限公司, 瑞声科技(新加坡)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Priority to PCT/CN2019/125709 priority Critical patent/WO2021119942A1/zh
Publication of WO2021119942A1 publication Critical patent/WO2021119942A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
    • H01P3/08—Microstrips; Strip lines

Definitions

  • the invention relates to the field of signal transmission control, in particular to a transmission line and terminal equipment.
  • Commonly used structures mainly include micro Strip line, coplanar waveguide line, strip line and dielectric integrated waveguide, etc.; integrated terminal equipment space structure, general transmission line modules need to be bent one or more times, and there is a risk of fracture in the narrow bending area, so local or
  • the grid copper design is carried out in a large area; the grid copper structure will destroy the reference ground structure of the transmission line, resulting in impedance mismatch, resulting in performance degradation.
  • the purpose of the present invention is to provide a transmission line that does not affect the transmission performance under bending conditions.
  • a transmission line including at least one layer of ground conductor and a signal layer; a signal transmission line is arranged in the signal layer, and the width of the ground conductor is greater than that of the signal transmission line;
  • the signal transmission direction includes at least two connection areas and at least one bending area sandwiched between the two connection areas; in the bending area, the ground conductor includes a ground corresponding to the signal transmission line A sheet and ground grids arranged on both sides of the ground sheet in a direction perpendicular to the signal transmission direction, and the ground sheet and the ground grid are both connected to the ground conductors of the connection areas at both ends thereof.
  • the orthographic projection of the signal transmission line on the ground conductor is located in the ground sheet.
  • the ground grid includes a plurality of wires, and the plurality of wires are arranged crosswise to form a grid structure.
  • the plurality of wires includes a plurality of first wires and a plurality of second wires, the plurality of first wires and a plurality of second wires are arranged crosswise, and the first wires are arranged in parallel along the first straight line, and the second wires are arranged in parallel along the first straight line. The wires are arranged in parallel along the second straight line.
  • first straight line is perpendicular to the second straight line.
  • the transmission line includes two layers of ground conductors, which are respectively arranged on both sides of the signal layer.
  • the present invention also provides a terminal device, which includes any of the above-mentioned transmission lines.
  • the beneficial effects of the present invention are that a mesh structure is provided in the bending area of the ground conductor, so that the transmission line is easy to bend and not easy to break during wiring, and in the bending area, the projection position of the ground conductor relative to the signal transmission line is set.
  • a non-mesh structure which reduces the influence of the mesh structure on the impedance and ensures the transmission performance of the transmission line.
  • FIG. 1 is a schematic diagram of the split of the transmission line of the embodiment of the present invention.
  • FIG. 2 is an enlarged schematic diagram of a bending area of a transmission line according to an embodiment of the present invention
  • Fig. 3 is a graph of reflection coefficient of an embodiment of the present invention:
  • Fig. 4 is a graph of transmission coefficients according to an embodiment of the present invention.
  • the embodiment of the present invention provides a transmission line and terminal equipment.
  • Terminal devices include but are not limited to smart phones, tablet computers, and portable wearable devices.
  • the transmission line includes at least one layer of ground conductor 10 and a signal layer 20; the signal layer 20 is provided with a signal transmission line 21, and the width of the ground conductor 10 is greater than that of the signal transmission line 21;
  • the transmission line includes at least two connection areas 11 and at least one bending area 12 sandwiched between the two connection areas 11 in the signal transmission direction; in the bending area 12, the ground conductor 10 includes corresponding The ground strip 122 on the signal transmission line 21 and the ground grid 121 provided on both sides of the ground strip in a direction perpendicular to the signal transmission direction, the ground strip 122 and the ground grid 121 are both The ground conductor 10 of the connection area 11 is connected.
  • the transmission line includes two layers of ground conductors 10 and a signal layer 20 sandwiched between the two layers of ground conductors 10, the ground conductor 10 is connected to the ground, and the signal layer 20 is used to transmit radio frequency signals.
  • the transmission line includes two connection areas 11 and at least one bending area 12, and the bending area 12 is connected to the two connection areas 11 to connect the connection areas 11 into a whole.
  • the transmission line may include a plurality of connection areas 11, and any two connection areas 11 are electrically connected by a bending area 12 to form a complete transmission line.
  • the signal layer 20 further includes a substrate 22, the signal transmission line 21 is embedded in the substrate 22, and the ground conductor 10 is attached to the surface of the substrate 22.
  • the grounding conductor 10 includes a grounding strip 122 and a grounding grid 121 in the bending area 12. Both ends of the grounding strip 122 along the A3 direction are electrically connected to the grounding conductor 10 of the connection area 11, and the two ends of the grounding strip 122 perpendicular to the A3 direction are electrically connected to A ground grid 121 is connected, and two ends of the ground grid 121 along the A3 direction are respectively electrically connected to the ground conductor 10 in the connection area.
  • the signal layer 20 is electrically connected to the antenna of the terminal device and the signal processing unit of the antenna, and the ground conductor 10 serves as a reference ground.
  • the orthographic projection of the signal transmission line 21 on the ground conductor 10 is located in the ground sheet 122.
  • the orthographic projection of the ground sheet 122 on the signal layer 20 covers the signal transmission line 21.
  • the signal layer 20 is sandwiched between the two layers of ground conductors 10, and the signal layer 20 of the bending area 12 corresponds to the ground sheet 122 of the ground conductor 10.
  • the ground sheet 122 sandwiches and covers the signal transmission line 21 in the bending area 12, which can enhance the structural continuity of the ground conductor 10 without affecting the easy bending characteristics of the ground grid 121, and affect the impedance of the signal layer 20 Decrease.
  • the grounding network 122 includes a plurality of wires, and the plurality of wires are intersected to form a grid structure.
  • the bending area 12 is the bending area 12 of the transmission line in the terminal equipment.
  • the ground grid 121 provided in the bending area 12 is arranged by a plurality of wires crossing to form a plurality of grid structures.
  • the grid of the grounding grid 121 may be a prismatic, rectangular, triangular, or hexagonal grid with elasticity, which is not limited by the present invention.
  • the plurality of wires includes a plurality of first wires 1211 and a plurality of second wires 1212, and the plurality of first wires 1211 and a plurality of second wires 1212 are arranged crosswise to form a grid structure, and the first wires 1211 are along the first wires 1211.
  • the straight line L1 is arranged in parallel, and the second wire 1212 is arranged in parallel along the second straight line L2.
  • first wires 1211 extending along a first straight line L1 and a plurality of second wires 1212 extending along a second straight line L2 are intersected, and the angle between the first straight line L1 and the second straight line L2 is 90. degree.
  • the bending zone 12 of the transmission line is arranged at the bending part of the internal space of the terminal device. Through the flexibility of the grid, the risk of fracture in the bending zone 12 is reduced, and the performance of the transmission line is intact.
  • the first straight line L1 is perpendicular to the second straight line L2, which is more convenient for production in the process of mass industrial production.
  • the bending area 12 includes two grounding grids 121, the two grounding grids 121 are respectively located at two sides of the grounding plate 122, and the two grounding grids 121 are electrically connected to the grounding plate 122.
  • the elasticity of the grounding grid 121 can reduce the pulling effect of the edges on both sides of the bending area 12 due to bending, and reduce the risk of fracture.
  • the ground grid 121 of the transmission line makes the transmission line more flexible and reduces the risk of bending and breaking of the transmission line.
  • the signal layer 20 is provided at the orthographic projection position on the ground conductor 10.
  • the ground strip 122 increases the continuity of the ground conductor 10, so that the grid-like arrangement of the ground grid 121 reduces the impedance of the signal layer 20, and the transmission line is not easily broken during the bending process.

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  • Telephone Set Structure (AREA)

Abstract

本发明提供了一种传输线，所述传输线包括至少一层接地导体以及信号层；所述信号层内设有信号传输线，所述接地导体的宽度大于所述信号传输线；所述传输线在信号传输方向上包括至少两个连接区和至少一个夹设于两个所述连接区之间的弯折区；在所述弯折区内，所述接地导体包括对应于所述信号传输线的接地片和在垂直于信号传输方向的方向上设于所述接地片两侧的接地网格，所述接地片和所述接地网格均与其两端的所述连接区的接地导体连接。本发明提供的传输线和终端设备，在接地导体的弯折区设置有网孔结构，以使传输线在布线时易于弯折，且在弯折区，接地导体上信号传输线的投影位置设有接地片，减小网状结构对阻抗的影响，确保了传输线的传输性能。

Description

传输线以及终端设备 技术领域
本发明涉及一种信号传输控制领域，尤其涉及一种传输线以及终端设备。
 背景技术
随着5G（5th generation mobile networks）及消费类电子技术的发展，对多天线技术的研究由来已久。可供传统射频同轴传输线布局的空间也越来越小，因此新型传输结构应运而生；针对多天线射频传输线设计，主要采用PCB平面电路或挠性电路等方式设计，常用的结构主要有微带线、共面波导线、带状线及介质集成波导等；综合终端设备空间结构，一般传输线模组需要进行一次或多次弯折，狭窄的弯折区域存在断裂风险，因此需对局部或大面积区域进行网格铜设计；网格铜结构会破坏传输线参考地结构，导致阻抗失配，从而导致性能降低。
 技术问题
本发明的目的在于提供一种弯折情况下不影响传输性能的传输线。
 技术解决方案
本发明的技术方案如下：一种传输线，所述传输线包括至少一层接地导体以及信号层；所述信号层内设有信号传输线，所述接地导体的宽度大于所述信号传输线；所述传输线在信号传输方向上包括至少两个连接区和至少一个夹设于两个所述连接区之间的弯折区；在所述弯折区内，所述接地导体包括对应于所述信号传输线的接地片和在垂直于信号传输方向的方向上设于所述接地片两侧的接地网格，所述接地片和所述接地网格均与其两端的所述连接区的接地导体连接。
进一步地，在所述弯折区内，所述信号传输线在所述接地导体上的正投影位于所述接地片内。
进一步地，所述接地网格包括若干导线，若干导线交叉设置，以形成网格结构。
进一步地，所述若干导线包括若干第一导线以及若干第二导线，所述若干第一导线以及若干第二导线交叉设置，且所述第一导线沿第一直线平行设置，所述第二导线沿第二直线平行设置。
进一步地，第一直线与所述第二直线垂直。
进一步地，所述传输线包括两层接地导体，分别设置在所述信号层的两侧。
本发明还提供一种终端设备，所述终端设备包括上述任意的传输线。
 有益效果
本发明的有益效果在于：在接地导体的弯折区设置有网状结构，以使传输线在布线时易于弯折，不易断裂，且在弯折区，接地导体上相对于信号传输线的投影位置设有非网状结构，减小网状结构对阻抗的影响，确保了传输线的传输性能。
 附图说明
图1是本发明实施例的传输线的拆分示意图；
图2是本发明实施例的传输线的弯折区放大示意图；
图3是本发明实施例的反射系数曲线图：
图4是本发明实施例的传输系数曲线图。
 本发明的实施方式
为了使本发明实施方式的目的、技术方案和优点更加清楚，下面将结合附图对本发明的各个实施方式进行详细的阐述。然而，本领域的普通技术人员可以理解，在本发明各实施方式中，为了使读者更好理解本发明而提出了许多技术细节。但是，即使没有这些技术细节和基于以下各实施方式的种种变化和修改，也可以实现本发明所要求保护的技术方案。
本发明实施例提供一种传输线以及终端设备，在终端设备中布设天线时，需要通过传输线电连接天线和终端设备的信号处理单元。对此，通过本传输线，可在终端设备有限的空间内进行有效的传输布局。终端设备包括但不限于智能手机、平板电脑和便携式可穿戴设备。
请参看图1-2，所述传输线包括至少一层接地导体10以及信号层20；所述信号层20内设有信号传输线21，所述接地导体10的宽度大于所述信号传输线21；所述传输线在信号传输方向上包括至少两个连接区11和至少一个夹设于两个所述连接区11之间的弯折区12；在所述弯折区12内，所述接地导体10包括对应于所述信号传输线21的接地片122和在垂直于信号传输方向的方向上设于所述接地片两侧的接地网格121，所述接地片122和所述接地网格121均与其两端的所述连接区11的接地导体10连接。
在本实施例中，传输线包括两层接地导体10以及夹设在两层接地导体10之间的信号层20，接地导体10与地连接，信号层20用于传输射频信号。具体的，传输线包括两个连接区11以及至少一个弯折区12，所述弯折区12与两个连接区11相连，以将各连接区11相连组合成一整体。在一些实施例中，传输线可包括多个连接区11，任意两个连接区11之间通过一个弯折区12电连接，以构成完整的传输线。具体的，所述信号层20还包括基板22，信号传输线21埋设在基板22中，接地导体10附着于基板22的表面。具体的，信号在传输线上沿着A3方向传播。接地导体10在弯折区12包括接地片122和接地网格121，接地片122沿A3方向的两端分别电连接有连接区11的接地导体10，接地片122垂直A3方向的两端分别电连接有一接地网格121，接地网格121的沿A3方向的两端分别电连接连接区的接地导体10。具体的，信号层20与终端设备的天线以及天线的信号处理单元电连接，接地导体10作为参考地。
优选的，在所述弯折区12内，所述信号传输线21在所述接地导体10上的正投影位于所述接地片122内。
具体的，在弯折区12，接地片122在信号层20上的正投影覆盖信号传输线21。可以理解，两层接地导体10将信号层20夹设在中间，弯折区12的信号层20对应于接地导体10的接地片122。接地片122将弯折区12内的信号传输线21夹设覆盖，可在不影响接地网格121的易弯折特性的前提下，增强接地导体10的结构连续性，对信号层20的阻抗影响减小。
优选的，所述接地网络122包括若干导线，若干导线交叉设置，以形成网格结构。
具体的，弯折区12为传输线在终端设备中的弯折区12，为减少弯折造成传输线的断裂，弯折区12设置的接地网格121由若干导线交叉设置，形成多个网格结构，减少传输线弯折对弯折区12的拉扯力，减小断裂的风险。接地网格121的网格可以为棱形、长方形、三角形或者六角形等具备伸缩性的网格，对此本发明对此并不限制。
优选的，所述若干导线包括若干第一导线1211以及若干第二导线1212，所述若干第一导线1211以及若干第二导线1212交叉设置，以形成网格结构，所述第一导线1211沿第一直线L1平行设置，所述第二导线1212沿第二直线L2平行设置。
本实施例中，若干沿第一直线L1延伸的第一导线1211与若干第二直线L2延伸的第二导线1212相交设置，且第一直线L1与第二直线L2相交的夹角为90度。传输线的弯折区12设置在终端设备的内部空间弯折处，通过网格的伸缩性，减少弯折区12的断裂风险，保证了传输线的性能完好。第一直线L1与第二直线L2垂直，在进行大批量工业生产的过程中更加方便生产。                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
在本实施例中，弯折区12包括两个接地网格121，两接地网格121分别位于接地片122的两侧边缘，两接地网格121均与接地片122电连接。通过接地网格121的伸缩性，以减少因弯折对弯折区12两侧边缘的拉扯效果，降低断裂风险。
如图3所示，对比使用本发明传输线前的终端设备的反射系数曲线S2和使用本发明传输线后的终端设备的反射系数曲线S1可见，使用本发明的传输线能够有效降低传输过程中的回波损耗，以提高终端设备的射频性能。
如图4所示，对比终端设备使用本发明传输线前的传输系数曲线S3和使用本发明传输线后的传输系数曲线S4曲线图可见，使用本发明的传输线后的插入损耗性能更优。
上述实施例中，在传输线的接地网格121使得传输线的伸缩性更强，减少了传输线弯折断裂的风险，并且在弯折区12，信号层20在接地导体10上的正投影位置设置有接地片122，增加接地导体10的连续性，使接地网格121的网格状设置对信号层20的阻抗影响减小，传输线在弯折过程中不易折断。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
以上所述的仅是本发明的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出改进，但这些均属于本发明的保护范围。

Claims (7)

  1. 一种传输线，其特征在于，所述传输线包括至少一层接地导体以及信号层；所述信号层内设有信号传输线，所述接地导体的宽度大于所述信号传输线；所述传输线在信号传输方向上包括至少两个连接区和至少一个夹设于两个所述连接区之间的弯折区；在所述弯折区内，所述接地导体包括对应于所述信号传输线的接地片和在垂直于信号传输方向的方向上设于所述接地片两侧的接地网格，所述接地片和所述接地网格均与其两端的所述连接区的接地导体连接。
  2. 根据权利要求1所述的传输线，其特征在于，在所述弯折区内，所述信号传输线在所述接地导体上的正投影位于所述接地片内。
  3. 根据权利要求2所述的传输线，其特征在于，所述接地网格包括若干导线，若干导线交叉设置，以形成网格结构。
  4. 根据权利要求3所述的传输线，其特征在于，所述若干导线包括若干第一导线以及若干第二导线，所述若干第一导线以及若干第二导线交叉设置，且所述第一导线沿第一直线平行设置，所述第二导线沿第二直线平行设置。
  5. 根据权利要求4所述的传输线，其特征在于，第一直线与所述第二直线垂直。
  6. 根据权利要求5所述的传输线，其特征在于，所述传输线包括两层接地导体，分别设置在所述信号层的两侧。
  7. 一种终端设备，其特征在于，所述终端设备包括上述权利要求1-6任意一种所述的传输线。
PCT/CN2019/125709 2019-12-16 2019-12-16 传输线以及终端设备 WO2021119942A1 (zh)

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JP2010212438A (ja) * 2009-03-10 2010-09-24 Sumitomo Bakelite Co Ltd 回路基板
US8248183B2 (en) * 2009-07-30 2012-08-21 Sierra Wireless, Inc. Circuit board pad having impedance matched to a transmission line and method for providing same
CN104733823A (zh) * 2015-04-14 2015-06-24 上海安费诺永亿通讯电子有限公司 一种可弯折的扁平传输线
CN105393645A (zh) * 2014-06-16 2016-03-09 日本梅克特隆株式会社 柔性印刷电路板和柔性印刷电路板的制造方法
CN205646089U (zh) * 2014-01-20 2016-10-12 株式会社村田制作所 信号线路
CN206441554U (zh) * 2016-09-10 2017-08-25 电连技术股份有限公司 一种信号传输线及电子设备
CN108141952A (zh) * 2015-09-24 2018-06-08 吉佳蓝科技股份有限公司 弯曲耐久性被改善的柔性电路板

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US20050190006A1 (en) * 2004-02-27 2005-09-01 Atsuhito Noda Flat flexible circuitry
JP2010212438A (ja) * 2009-03-10 2010-09-24 Sumitomo Bakelite Co Ltd 回路基板
US8248183B2 (en) * 2009-07-30 2012-08-21 Sierra Wireless, Inc. Circuit board pad having impedance matched to a transmission line and method for providing same
CN205646089U (zh) * 2014-01-20 2016-10-12 株式会社村田制作所 信号线路
CN105393645A (zh) * 2014-06-16 2016-03-09 日本梅克特隆株式会社 柔性印刷电路板和柔性印刷电路板的制造方法
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