WO2021119943A1 - 传输线以及终端设备 - Google Patents
传输线以及终端设备 Download PDFInfo
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- WO2021119943A1 WO2021119943A1 PCT/CN2019/125710 CN2019125710W WO2021119943A1 WO 2021119943 A1 WO2021119943 A1 WO 2021119943A1 CN 2019125710 W CN2019125710 W CN 2019125710W WO 2021119943 A1 WO2021119943 A1 WO 2021119943A1
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- WIPO (PCT)
- Prior art keywords
- transmission line
- ground conductor
- wires
- ground
- signal transmission
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Classifications
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- 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 A large area area is designed with grid copper; the grid copper structure will damage the second ground conductor 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.
- the transmission line includes at least one layer of a first ground conductor and a substrate layer; the substrate layer is provided with a signal transmission line and a second ground conductor arranged between the first ground conductor and the signal transmission line.
- Grounding conductor, the width of the second grounding conductor is greater than the width of the signal transmission line and less than the width of the first grounding conductor; each of the first grounding conductors is provided with at least two connection areas and at least one is sandwiched between two In the grid area between the connection areas, the second ground conductor is directly opposite to the grid area.
- the two ends of the second ground conductor in the signal transmission direction are respectively electrically connected to the two connection areas.
- the signal transmission line is directly opposite to the second ground conductor.
- the transmission line includes two first ground conductors, and the substrate layer is sandwiched between the two first ground conductors.
- the transmission line includes two second ground conductors, and the two second ground conductors are respectively arranged on both sides of the signal transmission line.
- the grid area includes a plurality of wires, and the plurality of wires are intersected 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 present invention also provides a terminal device, which includes any of the above-mentioned transmission lines.
- the beneficial effect of the present invention is that the grid area of the transmission line makes the transmission line more flexible and reduces the risk of bending and breaking of the transmission line.
- the impedance can be optimized without changing the structure of the signal transmission line, which effectively guarantees the transmission performance of the transmission line.
- Figure 1 is a perspective exploded view of a transmission line according to a first embodiment of the present invention
- Figure 2 is a perspective exploded view of a transmission line according to a second embodiment of the present invention.
- Figure 3 is a three-dimensional assembly view of the transmission line of the first embodiment of the present invention.
- Fig. 4 is a schematic diagram of an enlarged view of the range A in Fig. 3;
- Fig. 5 is a schematic cross-sectional view of the grid area in the range A in Fig. 3;
- Fig. 6 is a graph of the reflection coefficient of an embodiment of the present invention:
- Fig. 7 is a graph of transmission coefficients according to an embodiment of the present invention.
- Fig. 8 is a graph of impedance of an embodiment of the present invention.
- the first ground conductor 10, the connection area; 11, the grid area; 1211, the first wire; 1212, the second wire; 2, the substrate layer; 21, the signal transmission line; 22, the substrate; 3.
- the second ground conductor 10.
- 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.
- FIG. 1 is a three-dimensional exploded view of a transmission line according to a first embodiment of the present invention.
- the transmission line includes at least one layer of a first ground conductor 1 and a substrate layer 2; the substrate layer 2 is provided with a signal transmission line 21 and a device
- the width of the second ground conductor 3 between the signal transmission line 21 and the first ground conductor 1 is greater than the width of the signal transmission line 21 and smaller than that of the first ground conductor 1.
- Width; the first ground conductor 1 is provided with at least two connection areas 10 and at least one grid area 11 sandwiched between the two connection areas 10, the second ground conductor 3 is directly opposite ⁇ Grid area 11.
- the transmission line includes a first ground conductor 1, a transmission layer 2, and a second ground conductor 3.
- the first ground conductor 1 is composed of a connection area 10 and a mesh area 11; the first ground conductor 1 is connected to the ground.
- the substrate layer 2 includes a substrate 22, a signal transmission line 21 and a second ground conductor 3 embedded in the substrate 22, and the first ground conductor 1 is attached to the surface of the substrate 22.
- the first ground conductor 1, the second ground conductor 3, and the signal transmission line 21 are all arranged at intervals.
- the grid area 11 of the first ground conductor 1 is a grid structure including a plurality of meshes, and the flexibility of the grid can make the transmission line easier to bend, and not easy to bend and break.
- the second grounding conductor 3 is made of the same conductive material as the first grounding conductor 1.
- One side of the second grounding conductor 3 is attached to the mesh area 11 to achieve grounding; it is understandable that the mesh area 11 is a mesh structure Electrical connection, insufficient grounding, and impedance mismatch problems.
- the area of the reference ground is increased and the impedance of the signal line 2 is optimized.
- the width of the two ends of the second ground conductor 3 perpendicular to the signal transmission direction is smaller than the width of the mesh area 11, which reduces the impact on the scalability of the mesh area 11.
- both ends of the second ground conductor 3 in the signal transmission direction are electrically connected to the two connection areas 10 respectively, so that the ground potentials of the second ground conductor 3 and the first ground conductor 1 are more consistent.
- both ends of the second ground conductor 3 can be electrically connected to the connection area 10 through a metalized through hole. It can be understood that, in order to enable the second ground conductor 3 to be electrically connected to the two connection areas 10, the length of the signal transmission direction of the second ground conductor 3 is greater than the length of the mesh area 11 in the signal transmission direction.
- the transmission line includes two first ground conductors 1, and the substrate layer 2 is sandwiched between the two first ground conductors 1.
- the transmission line includes two first ground conductors 1 and a second ground conductor 3, the edges of the first ground conductors 1 are aligned, and the second ground conductor 3 and the substrate layer 2 structure are sandwiched in the middle. Specifically, the respective mesh regions 11 of the two first ground conductors 1 are arranged opposite to each other, and the second ground conductor 3 and the substrate layer 2 are located between the two mesh regions 11. It can be understood that the second ground conductor 3 is only provided on one side of the substrate layer 2.
- the transmission line includes two second ground conductors 3; the signal line 2 is sandwiched between the second ground conductors 3.
- the present invention discloses a transmission line of the second embodiment.
- the transmission line of the second embodiment includes two second ground conductors 3, and the signal transmission line 21 is arranged on both sides. Between the second ground conductors 3, the edges of the two first ground conductors 1 are aligned, and the two second ground conductors 3 are sandwiched in the middle. Specifically, the second ground conductor 3 and the signal transmission line 21 are sandwiched between the two mesh regions 11, and the impedance of the signal line 2 between the two mesh regions 11 is optimized by the two second ground conductors 3.
- the two second grounding conductors 3 are electrically connected to the adjacent grid area 11 respectively, and both ends of the two second grounding conductors 3 are also electrically connected to the connection area 10 of the adjacent first grounding conductor 1 to stabilize the first Two grounding conductors 3 make the impedance matching optimization effect better.
- the grid area 11 includes a plurality of wires, and the plurality of wires are intersected to form a grid structure.
- the grid area 11 is the bending area of the transmission line in the terminal equipment. In order to reduce the breakage of the transmission line caused by bending, the grid area 11 is arranged by several wires crossing to form multiple grid structures. , To reduce the pulling force of the bending of the transmission line to the grid area 11, and reduce the risk of fracture.
- the grid of the grid area 11 may be a prismatic, rectangular, triangular, or hexagonal mesh 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 mesh structure.
- 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 area 12 of the transmission line is arranged at the bending part of the internal space of the terminal device. Through the flexibility of the mesh, the risk of fracture in the bending area 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 grid area 11 of the transmission line makes the transmission line more flexible, reducing the risk of bending and breaking the transmission line.
- the impedance can be optimized without changing the structure of the signal transmission line 21, effectively ensuring the transmission performance of the transmission line. I have to do it
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Abstract
本发明提供了一种传输线和电子设备，所述传输线包括至少一层第一接地导体和基板层；所述基板层内设有信号传输线以及设置在所述第一接地导体和所述信号传输线之间的第二接地导体，所述第二接地导体的宽度大于所述信号传输线的宽度且小于所述第一接地导体的宽度；所述第一接地导体均设有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网格区，所述第二接地导体正对所述网格区。同时，通过在网格区与信号线之间设置第二接地导体，可在不改变信号线结构的基础上优化阻抗，有效保证了传输线的传输性能。
Description
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。
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第二接地导体，导致阻抗失配，从而导致性能降低。
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。
本发明的技术方案如下：所述传输线包括至少一层第一接地导体和基板层；所述基板层内设有信号传输线以及设置在所述第一接地导体和所述信号传输线之间的第二接地导体，所述第二接地导体的宽度大于所述信号传输线的宽度且小于所述第一接地导体的宽度；所述第一接地导体均设有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网格区，所述第二接地导体正对所述网格区。
进一步地，所述第二接地导体在信号传输方向上的两端分别电连接两个连接区。
进一步地，所述信号传输线的正对于所述第二接地导体。
进一步地，所述传输线包括两个第一接地导体，所述基板层夹设于在所述两个第一接地导体之间。
进一步地，所述传输线包括两个第二接地导体，所述两个第二接地导体分别设置在所述信号传输线的两侧。
进一步地，所述网格区包括若干导线，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。
本发明还提供一种终端设备，所述终端设备包括上述任意所述的传输线。
本发明的有益效果在于：在传输线的网格区使得传输线的伸缩性更强，减少了传输线弯折断裂的风险。同时，通过在网格区与信号传输线之间设置第二接地导体，可在不改变信号传输线结构的基础上优化阻抗，有效保证了传输线的传输性能。
图1是本发明第一实施例的传输线的立体分解图；
图2是本发明第二实施例的传输线的立体分解图；
图3是本发明第一实施例的传输线的立体组装图；
图4是图3中A范围的放大图的示意图；
图5是图3中A范围内网格区的剖面示意图；
图6是本发明实施例的反射系数的曲线图：
图7是本发明实施例的传输系数的曲线图；
图8是本发明实施例的阻抗的曲线图。
附图说明：1、第一接地导体；10、连接区；11、网格区；1211、第一导线；1212、第二导线；2、基板层；21、信号传输线；22、基板；3、第二接地导体。
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，图1为本发明第一实施例的传输线立体分解图，所述传输线包括至少一层第一接地导体1和基板层2；所述基板层2内设有信号传输线21以及设于所述信号传输线21与所述第一接地导体1之间的第二接地导体3，所述第二接地导体3的宽度大于所述信号传输线21的宽度且小于所述第一接地导体1的宽度；所述第一接地导体1均设有至少两个连接区10和至少一个夹设于两个所述连接区10之间的网格区11，所述第二接地导体3的正对所述网格区11。
在本实施例中，传输线包括第一接地导体1、传输层2以及第二接地导体3，第一接地导体1由连接区10和网格区11组成；第一接地导体1与地连接。请参看图5，基板层2包括基板22以及埋设于所述基板22内的信号传输线21和第二接地导体3，第一接地导体1附着于基板22的表面。第一接地导体1、第二接地导体3、信号传输线21之间均间隔设置。第一接地导体1的网格区11为包括多个网孔的网格结构，利用网格的伸缩性，能使传输线更易弯折，且不易弯折断裂。第二接地导体3为与第一接地导体1的材质一样的导电材质，第二接地导体3的一侧附着于网格区11，实现接地；可以理解的，网格区11因是网格结构电连接，接地不充分，存在阻抗失配问题，通过在信号传输线21以及网格区11之间设置第二接地导体3，增大参考地面积，优化信号线2阻抗。同时，第二接地导体3垂直于信号传输方向的两端宽度小于网格区11的宽度，减少对网格区11伸缩性的影响。
优选的，第二接地导体3在信号传输方向上的两端分别电连接两个连接区10，使第二接地导体3与第一接地导体1的接地电位更一致。具体的，第二接地导体3的两端可与连接区10通过金属化通孔与连接区10电连接。可以理解的，为了使第二接地导体3能够与两个连接区10电连接，第二接地导体3的信号传输方向的长度大于网格区11在信号传输方向的长度。
优选的，所述传输线包括两个第一接地导体1，所述基板层2夹设于所述两个第一接地导体1之间。
在本实施例中，传输线包括两个第一接地导体1以及一个第二接地导体3，第一接地导体1的边缘对齐，将第二接地导体3以及基板层2结构夹设在中间。具体的，两个第一接地导体1的各个网格区11相对设置，第二接地导体3与基板层2位于两网格区11之间。可以理解的，第二接地导体3仅设置于基板层2的一侧。
优选的，所述传输线包括两个第二接地导体3；所述信号线2夹设在所述第二接地导体3之间。
请参看图2，本发明公开了第二实施例的传输线，与第一实施例的传输线的不同之处在于，第二实施例的传输线包括两个第二接地导体3，信号传输线21设置在两第二接地导体3之间，两第一接地导体1边缘对齐，将两第二接地导体3夹设在中间。具体的，第二接地导体3与信号传输线21夹设在两网格区11之间，由两第二接地导体3优化两网格区11之间信号线2的阻抗。可以理解的，两第二接地导体3分别与临近的网格区11电连接，两第二接地导体3的两端也分别与相邻的第一接地导体1的连接区10电连接，稳定第二接地导体3，使阻抗匹配优化效果更佳。
优选的，所述网格区11包括若干导线，若干导线交叉设置，以形成网格结构。
具体的，请参看图3-4，网格区11为传输线在终端设备中的弯折区域，为减少弯折造成传输线的断裂，网格区11由若干导线交叉设置，形成多个网格结构，减少传输线弯折对网格区11的拉扯力，减小断裂的风险。网格区11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孔，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，以形成网孔结构所述第一导线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，通过网孔的伸缩性，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。
如图6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S1和使用本发明传输线后的终端设备的反射系数曲线S2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7所示，对比终端设备使用本发明传输线前的传输系数曲线S4和使用本发明传输线后的传输系数曲线S3曲线图可见，使用本发明的传输线后的插入损耗性能更优。
如图8所述，对比终端设备使用的网格区11增加第二接地导体3之前的阻抗曲线S5以及增加第二接地导体3之后的阻抗曲线S6可见，使用增加第二接地导体3后的网格区11阻抗明显得到改善。
上述实施例中，在传输线的网格区11使得传输线的伸缩性更强，减少了传输线弯折断裂的风险。同时，通过在网格区11与信号线2之间设置第二接地导体3，可在不改变信号传输线21结构的基础上优化阻抗，有效保证了传输线的传输性能。
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 (9)
- 一种传输线，其特征在于，所述传输线包括至少一层第一接地导体和基板层；所述基板层内设有信号传输线以及设置在所述第一接地导体和所述信号传输线之间的第二接地导体，所述第二接地导体的宽度大于所述信号传输线的宽度且小于所述第一接地导体的宽度；所述第一接地导体均设有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网格区，所述第二接地导体正对所述网格区。
- 根据权利要求1所述的传输线，其特征在于，所述第二接地导体在信号传输方向上的两端分别电连接所述两个连接区。
- 根据权利要求1所述的传输线，其特征在于，所述信号传输线的正对于所述第二接地导体。
- 根据权利要求1所述的传输线，其特征在于，所述传输线包括两个第一接地导体，所述基板层夹设于在所述两个第一接地导体之间。
- 根据权利要求4所述的传输线，其特征在于，所述传输线包括两个第二接地导体，所述两个第二接地导体分别设置在所述信号传输线的两侧。
- 根据权利要求1所述的传输线，其特征在于，所述网格区包括若干导线，若干导线交叉设置，以形成网格结构。
- 根据权利要求6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。
- 根据权利要求7所述的传输线，其特征在于，第一直线与所述第二直线垂直。
- 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1-8任意一项所述的传输线。
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