WO2017036050A1 - 一种移动终端的天线装置及移动终端 - Google Patents

一种移动终端的天线装置及移动终端 Download PDF

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Publication number
WO2017036050A1
WO2017036050A1 PCT/CN2015/100269 CN2015100269W WO2017036050A1 WO 2017036050 A1 WO2017036050 A1 WO 2017036050A1 CN 2015100269 W CN2015100269 W CN 2015100269W WO 2017036050 A1 WO2017036050 A1 WO 2017036050A1
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Prior art keywords
metal
frame
trace
mobile terminal
middle frame
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PCT/CN2015/100269
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English (en)
French (fr)
Inventor
李克
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect

Definitions

  • the present invention relates to the field of antennas, and in particular, to an antenna device and a mobile terminal of a mobile terminal.
  • the antenna structure currently used by the mobile terminal is The metal middle frame is a closed structure, and the electromagnetic energy is effectively radiated by using a gap formed between the metal plate and the metal middle frame.
  • the current antenna structure has problems in that it is necessary to design a complex feed structure to match the slot antenna; when the resonant frequency of the slot antenna needs to be adjusted, the size of the slot is changed, the adjustment is not flexible enough, and the radiation performance of the slot antenna is weak. . At the same time, this structure also has a weakening effect on the structural strength of the mobile terminal.
  • the technical problem to be solved by the embodiments of the present invention is to provide an antenna device for a mobile terminal.
  • the invention can solve the problem of poor structural strength, weak radiation performance and inconvenient frequency adjustment of the antenna in the prior art.
  • a first aspect of the embodiments of the present invention provides an antenna device for a mobile terminal, including: a metal middle frame that is closed without a break point, a metal plate as a main ground, a first metal trace, and a second metal Traces;
  • the metal middle frame includes two side frames connected in a frame shape, a top frame and a bottom frame; two ends of the top frame are respectively connected to the top ends of the two side frames, and two of the bottom frames are respectively The ends are respectively connected to the bottom ends of the two side frames; the two sides of the metal plate are respectively connected to the two side frames of the metal middle frame, the bottom edge of the metal plate and the metal
  • the bottom frame of the frame forms a first window, the first metal trace and The second metal trace is disposed in the first window, the first metal trace is connected to the metal middle frame, and the second metal trace is simultaneously connected to the metal middle frame and the metal plate .
  • the first metal trace is connected to a bottom frame of the metal middle frame, and the second metal trace is simultaneously connected to a bottom frame of the metal middle frame and The bottom edge of the metal plate.
  • the top edge of the metal plate forms a second window with the top frame of the metal middle frame.
  • the first metal trace and the second metal trace are symmetrically disposed.
  • the first metal trace and the second metal trace are on the same plane.
  • the method further includes: a radio frequency circuit and a ground circuit, where the radio frequency circuit and the ground circuit are disposed above the metal plate, the radio frequency circuit and the first The two metal traces are electrically connected, and the ground circuit is electrically connected to the metal plate.
  • the first antenna trace and the second metal trace comprise a return trace.
  • the feed point is disposed at an edge of the metal plate.
  • a second aspect of the present invention provides a mobile terminal, comprising the antenna device according to any one of the preceding claims.
  • the method further includes: a backplane, a main circuit board, a battery, and a display screen; wherein the backplane is disposed under the metal panel and the metal panel Forming a cavity, the battery is disposed in the cavity, and the main circuit board and the display screen are disposed above the metal plate.
  • the backplane is made of a non-metal material.
  • the side of the metal plate is seamlessly connected with the side frame of the metal middle frame, which increases the structural strength of the antenna device; the metal plate and the metal middle frame are provided with metal wires in the window formed by adjusting the shape of the metal wire and The length changes the working frequency band, the adjustment is simple, the antenna device covers the high and low frequencies, and has better compatibility; at the same time, the main electromagnetic energy of the antenna device is concentrated in the lower half, which reduces the loss caused by the user to the antenna device and improves the radiation performance.
  • FIG. 1 is a schematic diagram showing a planar structure of an antenna apparatus of a mobile terminal according to an embodiment of the present disclosure
  • FIG. 2 is an assembled view of an antenna device of a mobile terminal according to an embodiment of the present invention
  • FIG. 3 is a graph showing a callback loss of an antenna device of a mobile terminal according to an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a planar structure of an antenna device of a mobile terminal according to an embodiment of the present invention.
  • an antenna device includes a metal middle frame 10, a metal plate 11, a first metal trace 12, and a first
  • the two metal wires 13 and the metal middle frame 10 are closed and uninterrupted structures
  • the metal middle frame 10 includes two side frames connected in a frame shape, a top frame and a bottom frame, and the two ends of the top frame are respectively connected to the two sides.
  • the two ends of the bottom frame are respectively connected to the bottom ends of the two side frames, and the two side frames are the left side frame and the right side frame, and the heights of the four frames may be equal, wherein the specific shape of the metal middle frame may be
  • the middle frame of the rectangle that is, the two adjacent frames form a right angle (as shown in Figure 1).
  • the metal middle frame is a rounded rectangle, that is, an arc is used to transition between two adjacent frames.
  • the metal plate 11 is a flat metal plate having a certain thickness.
  • the metal plate 11 may have a rectangular shape including four sides: a top edge, a bottom edge, a left side, and a right side opposite to the left side, and the left side of the metal plate 11 Seamlessly connected to the left frame of the metal middle frame 10, the right side of the metal plate 10 is seamlessly connected to the right frame of the metal middle frame 11, where the seamless connection refers to the metal plate 11
  • the sides of the metal frame are closely fitted to the sides of the metal middle frame without a gap.
  • the two side edges of the metal plate 11 and the two side frames of the metal middle frame 10 may have a perpendicular relationship.
  • a first window 14 is formed between the bottom edge of the metal plate 11 and the bottom frame of the metal middle frame 10, and the first metal trace 12 and the second metal trace 13 are disposed in the first window 14, the first metal trace 12 and the first
  • the shape and length of the two metal traces 13 are not limited, and the resonant frequency of the antenna device can be adjusted by controlling the shape and equivalent length of the metal traces in advance, and the first metal traces 12 are electrically connected to the metal middle frame 10; the metal plate 11 A feeding point 15 is provided, the feeding point 15 is a port connected to the radio frequency circuit, and the second metal wiring 13 is simultaneously connected to the metal middle frame 10 and the feeding point 15 provided on the metal plate 11.
  • the connection position of the first metal trace 12 and the second metal trace 13 to the metal middle frame 10 is not limited, for example, may be connected to the top frame, the bottom frame, the left frame or the right frame of the metal middle frame 10.
  • the metal middle frame 10 can further be provided with openings corresponding to various physical function buttons, for example, an opening of a metal middle frame 10 with a volume adjustment button, a power key opening, a USB interface opening, and the like. .
  • the seamless connection between the two sides of the metal middle frame and the two side frames of the metal plate can effectively increase the structural strength of the mobile terminal body, and the antenna of the structure is simple to process and easy to implement.
  • the implementation is simple and the radiation performance is significantly improved.
  • the first metal trace connects the bottom frame of the metal middle frame
  • the second metal trace connects the bottom frame of the metal middle frame and the bottom edge of the metal plate at the same time.
  • the first metal trace 12 is simultaneously electrically connected to the bottom frame of the metal middle frame 10 and the feed point 15 of the bottom edge of the metal plate 11, so that the RF signal generated by the RF circuit is output to the second metal through the feed point 15.
  • the trace 13, the first metal trace 12 and the metal middle frame 10 radiate out, and the electromagnetic energy is mainly concentrated on the bottom wall due to the bottom wall of the metal middle frame 10 connected by the first metal trace and the second metal trace.
  • a top edge of the metal plate forms a second window with a top frame of the metal middle frame.
  • the top edge of the metal plate 11 and the top frame of the metal middle frame 10 form a second window 16, and the second window 16 may be provided with an earpiece, a camera assembly, and the like.
  • the first metal trace and the second metal trace are symmetrically disposed.
  • the symmetric arrangement of the first metal trace 12 and the second metal trace means that two metal traces are in The two connection points on the bottom frame of the metal middle frame 10 are symmetrically distributed.
  • the connection point 17 of the first metal trace 12 and the bottom frame of the metal middle frame 10 the second metal trace 13 and the metal
  • the connection point 18 of the bottom frame of the middle frame 10 the connection point 17 and the connection point 18 are symmetrically distributed.
  • the first metal trace and the second metal trace are on the same plane.
  • first metal trace 12 and the second metal trace 13 are distributed in a plane, and the first metal trace 12 and the second metal trace are on the same plane, and are parallel to the metal plate 11.
  • the method further includes: a radio frequency circuit and a ground circuit, the radio frequency circuit and the ground circuit are disposed above the metal plate, and the radio frequency circuit is electrically connected to the second metal trace, the ground circuit Electrically connected to the metal plate.
  • the radio frequency circuit is configured to convert the baseband signal into a radio frequency signal, output to the antenna device of the embodiment of the present invention through the feeding point, and radiate into the free space by the antenna device; and receive the radio frequency signal in the free space through the antenna device,
  • the RF signal is input to the RF circuit through the feed point, and the RF circuit converts the RF signal into a baseband signal; the ground circuit is used for grounding.
  • the metal plate 11 is provided with a grounding point and a feeding point.
  • the RF circuit is electrically connected to the second metal trace 13 through the feeding point 15, and the grounding circuit is connected to the metal plate 11 through the grounding point.
  • the ground circuit and the radio frequency circuit may be disposed on the main circuit board, and the main circuit board is mounted on the metal board 11.
  • the first antenna trace and the second metal trace comprise a return trace.
  • the first metal trace 12 and the second metal trace 13 comprise a plurality of sets of mutually perpendicular traces. As shown in FIG. 1 , two adjacent line segments of the metal trace are perpendicular to each other at 90 degrees.
  • the equivalent total length of the first metal trace 12 is greater than the equivalent total length of the second metal trace 13, the low frequency band in which the first metal trace 12 operates, and the high frequency band in which the second metal trace 13 operates.
  • the embodiment of the present invention further provides a mobile terminal, where the mobile terminal includes the antenna device according to the embodiment of the present invention.
  • the mobile terminal may be a terminal device having an antenna device such as a smartphone, a tablet, a navigator or the like.
  • the mobile terminal further includes a backboard, a main circuit board, a battery, and a display screen; wherein the backboard is disposed under the metal plate and forms a cavity with the metal plate, and the battery is disposed in the cavity and above the metal plate Set up the main board and display.
  • the back plate is made of a non-metal material, for example, a non-metal material such as ceramic, plastic, wood or bamboo, and the invention is not limited.
  • FIG. 3 is a schematic diagram of an operating frequency band of an antenna device according to an embodiment of the present invention.
  • the antenna device of the embodiment of the present invention covers a plurality of frequency bands by adjusting the size and shape of the first metal trace and the second metal trace, and can simultaneously work at a low frequency. Frequency bands and high frequency bands to meet the performance requirements of various network standards for future mobile terminals.
  • the S11 parameter (return loss) corresponding to one of the operating modes of the antenna device shown in FIG. 3 supports the low frequency 1, the high frequency 1, the high frequency 2, and the high frequency 3 simultaneously.
  • the surface currents of the antenna devices operating in the above frequency bands are respectively measured.
  • the simulation results show that the regions with large surface currents are concentrated on the first metal traces, the second metal traces, the bottom edges of the metal plates, and the bottom frame of the metal middle frame. It means that most of the radiant energy is concentrated in the above area, so that when the user uses the mobile terminal to make a call, the hand or the ear usually does not touch the above area, so the loss caused by the user to the antenna device is small, and the radiation performance can be improved.

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Abstract

公开了移动终端的天线装置：封闭无断点的金属中框（10）包括连接成框形两个侧框、一顶框及一底框；顶框的两端分别连接至两个侧框的顶端，底框的两端分别连接至两个侧框的底端；金属板（11）的两侧边分别与金属中框的两个侧框无缝连接，金属板（11）的底边与金属中框（10）的底框形成第一窗口（14），第一金属走线（12）和第二金属走线（13）设置于第一窗口（14）中，第一金属走线（12）与金属中框（10）连接，第二金属走线（13）同时连接金属中框（10）和金属板（11）。还公开了一种移动终端。采用耦合馈入式移动终端天线装置，实现了无缝的天线装置，不会因为手握而导致天线性能下降，同时，手机的结构强度得以提高，并增强了美观性。

Description

一种移动终端的天线装置及移动终端
本申请要求于2015年08月28日提交中国专利局，申请号为201510543475.X、发明名称为“一种移动终端的天线装置及移动终端”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及天线领域，尤其涉及一种移动终端的天线装置及移动终端。
背景技术
随着用户对移动终端外观的要求不断提高，越来越多金属外观的移动终端出现在市场上，为了避免过多的金属材料对天线辐射的电磁能量的屏蔽，目前移动终端采用的天线结构为：金属中框为封闭结构，利用金属板与金属中框之间形成的缝隙有效辐射电磁能量。
目前的天线结构存在的问题是：需要设计复杂的馈电结构与缝隙天线匹配；需要调节缝隙天线谐振频率时通过改变缝隙的尺寸来实现，调节不够灵活，且这种缝隙天线的辐射性能较弱。同时这种结构对移动终端的结构强度也有弱化影响。
发明内容
本发明实施例所要解决的技术问题在于，提供一种移动终端的天线装置。可解决现有技术中天线的结构强度差、辐射性能弱和频率调节不方便的问题
为了解决上述技术问题，本发明实施例第一方面提供了一种移动终端的天线装置，包括：封闭无断点的金属中框、作为主地的金属板、第一金属走线和第二金属走线；
其中，所述金属中框包括连接成框形两个侧框、一顶框及一底框；所述顶框的两端分别连接至两个所述侧框的顶端，所述底框的两端分别连接至两个所述侧框的底端；所述金属板的两侧边分别与所述金属中框的两个侧框无缝连接，所述金属板的底边与所述金属中框的底框形成第一窗口，所述第一金属走线和 所述第二金属走线设置于所述第一窗口中，所述第一金属走线与所述金属中框连接，所述第二金属走线同时连接所述金属中框和所述金属板。
结合第一方面，在第一种可能的实现方式中，所述第一金属走线连接所述金属中框的底框，所述第二金属走线同时连接所述金属中框的底框和所述金属板的底边。
结合第一方面或第一种可能的实现方式，在第二种可能的实现方式中，所述金属板的顶边与所述金属中框的顶框形成第二窗口。
结合第一方面，在第三种可能的实现方式中，所述第一金属走线和所述第二金属走线对称设置。
结合第一方面的第三种可能的实现方式，在第四种可能的实现方式中，所述第一金属走线和所述第二金属走线位于同一平面上。
结合第一方面，在第五种可能的实现方式中，还包括：射频电路和接地电路，所述射频电路和所述接地电路设置于所述金属板的上方，所述射频电路与所述第二金属走线电连接，所述接地电路与所述金属板电连接。
结合第一方面，在第六种可能的实现方式中，所述第一天线走线和所述第二金属走线包括回形走线。
结合第一方面，在第七种可能的实现方式中，所述馈电点设于金属板的边缘。
本发明实施例第二方面提供了一种移动终端，其特征在于，包括上述任意一项所述的天线装置。
结合第二方面，在第一种可能的实现方式中，还包括：背板、主电路板、电池和显示屏；其中，所述背板设置于所述金属板的下方且与所述金属板形成腔体，所述电池设置与所述腔体中，所述金属板的上方设置所述主电路板和所述显示屏。
结合第二方面或第一种可能的实现方式，在第二种可能的实现方式中，所述背板为非金属材质。
实施本发明实施例，具有如下有益效果：
金属板的侧边与金属中框的侧框无缝连接，增加了天线装置的结构强度；金属板和金属中框形成的窗口中设置有金属走线，通过调节金属走线的形状和 长度改变工作频段，调节简单，使天线装置覆盖高低频，具有更好的兼容性；同时天线装置的主要电磁能量集中在下半部，减少用户对天线装置造成的损耗，提高辐射性能。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术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发明的一些实施例，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他的附图。
图1是本发明实施例提供的一种移动终端的天线装置的平面结构示意图；
图2是本发明实施例提供的一种移动终端的天线装置的装配图；
图3是本发明实施例的一种移动终端的天线装置的回拨损耗曲线图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
参见图1，为本发明实施例提供的一种移动终端的天线装置的平面结构示意图，在本发明实施例中，天线装置包括金属中框10、金属板11、第一金属走线12和第二金属走线13，金属中框10为封闭无断电结构，金属中框10包括连接成框形两个侧框、一顶框及一底框，顶框的两端分别连接至两个侧框的顶端，底框的两端分别连接至两个侧框的底端，两个侧框为左侧框和右侧框，四个框的高度可以相等，其中金属中框的具体形状可以是矩形中框，即相邻的两个框之间形成直角(如图1所示)。优选的，金属中框为圆角矩形，即相邻的两个框之间采用圆弧进行过渡。金属板11为一个具有一定厚度的平面金属板，作为主地，金属板11的形状可以为矩形，包括4个边：顶边、底边、左边和与左边相对的右边，金属板11的左边与金属中框10的左框无缝连接，金属板10的右边与金属中框11的右框无缝连接，此处无缝连接是指金属板11 的两侧边与金属中框的两侧框之间紧密贴合没有缝隙。同时，金属板11的两侧边与金属中框10的两侧框可以呈垂直关系。金属板11的底边与金属中框10的底框之间形成第一窗口14，第一窗口14内设置第一金属走线12和第二金属走线13，第一金属走线12和第二金属走线13的形状和长度不作限制，可以预先通过控制金属走线的形状和等效长度来调节天线装置的谐振频率，第一金属走线12与金属中框10电连接；金属板11上设置有馈电点15，馈电点15为与射频电路连接的端口，第二金属走线13同时连接金属中框10和金属板11上设置的馈电点15。其中，第一金属走线12和第二金属走线13与金属中框10的连接位置不作限制，例如，可以与金属中框10的顶框、底框、左框或右框连接。
可选的，金属中框10还可以还设有各种实体功能按键对应的开孔，例如，金属中框10上开设有音量调节键的开孔、电源键的开孔、USB接口开孔等。
由此看出，金属中框的两侧边和金属板的两侧框之间无缝连接，可有效增加移动终端机身的结构强度，同时这种结构的天线装作加工简单，易于实现。同时通过改变两个金属走线的形状和长度调整天线装置的谐振频率，实现简单，辐射性能得到显著提高。
可选的，所述第一金属走线连接所述金属中框的底框，所述第二金属走线同时连接所述金属中框的底框和所述金属板的底边。
具体的，第一金属走线12同时与金属中框10的底框和金属板11的底边的馈电点15电连接，这样射频电路产生的射频信号通过馈电点15输出至第二金属走线13、第一金属走线12和金属中框10辐射出去，由于第一金属走线和第二金属走线连接的金属中框10的底部墙体，电磁能量主要聚集在底部墙体上，用户在接听或拨打电话时，用户的手和耳朵不会接触到底部墙体，从而减少用户对移动终端电磁能量的衰减效应。
可选的，所述金属板的顶边与所述金属中框的顶框形成第二窗口。
具体的，金属板11的顶边与金属中框10的顶框形成第二窗口16，第二窗口16中可以设置听筒、摄像头组件等。
可选的，所述第一金属走线和所述第二金属走线对称设置。
具体的，第一金属走线12和第二金属走线对称设置是指两个金属走线在 金属中框10的底框上的两个连接点呈对称分布，如图1所示，第一金属走线12与金属中框10的底框的连接点17，第二金属走线13与金属中框10的底框的连接点18，连接点17和连接点18呈对称分布。
可选的，所述第一金属走线和所述第二金属走线位于同一平面上。
具体的，第一金属走线12和第二金属走线13呈平面分布，第一金属走线12和第二金属走线位于同一平面上，且均平行与金属板11。
可选的，还包括：射频电路和接地电路，所述射频电路和所述接地电路设置于所述金属板的上方，所述射频电路与所述第二金属走线电连接，所述接地电路与所述金属板电连接。
具体的，射频电路用于将基带信号转换为射频信号，通过馈电点输出至本发明实施例的天线装置，由天线装置辐射到自由空间中；以及通过天线装置接收自由空间中的射频信号，射频信号经过馈电点输入至射频电路，射频电路将射频信号转换为基带信号；接地电路用于接地。金属板11上设有接地点和馈电点，射频电路通过馈电点15与第二金属走线13的电连接，接地电路通过接地点与金属板11连接。其中，接地电路和射频电路可以设置在主电路板上，主电路板安装于金属板11的上方。
可选的，所述第一天线走线和所述第二金属走线包括回形走线。
具体的，第一金属走线12和第二金属走线13包括若干组相互垂直的走线，如图1所示，金属走线中相邻的两个线段均相互垂直，呈90度。第一金属走线12的等效总长度大于第二金属走线13的等效总长度，第一金属走线12工作的低频频段，第二金属走线13工作的高频频段。
本发明实施例还提供了一种移动终端，移动终端包括本发明实施例所述的的天线装置。移动终端可以是智能手机、平板电脑、导航仪等具有天线装置的终端设备。
可选，移动终端还包括背板、主电路板、电池和显示屏；其中，背板设置于金属板的下方且与金属板形成腔体，所述电池设置与腔体中，金属板的上方设置主电路板和显示屏。
可选的，背板为非金属材质，例如材质为陶瓷、塑胶、木材或竹材等非金属材质，本发明不作限制。
参见图3，为本发明实施例的天线装置的工作频段示意图，本发明实施例的天线装置通过调整第一金属走线和第二金属走线的尺寸和形状覆盖若干频段，可同时工作在低频频段和高频频段，以满足未来移动终端各种网络制式的性能需求。如图3所示的天线装置其中一种工作模式对应的S11参数(回波损耗)，该工作模式时同时支持低频1、高频1、高频2和高频3。分别对工作在上述频段的天线装置的表面电流进行测量，仿真结果为：表面电流大的区域集中在第一金属走线、第二金属走线、金属板的底边和金属中框的底框，表明大部分的辐射能量集中在上述区域，这样用户使用移动终端进行通话时，手或耳朵通常不会接触到上述区域，因此用户对天线装置造成的损耗较小，能提高辐射性能。
以上所揭露的仅为本发明一种较佳实施例而已，当然不能以此来限定本发明之权利范围，本领域普通技术人员可以理解实现上述实施例的全部或部分流程，并依本发明权利要求所作的等同变化，仍属于发明所涵盖的范围。

Claims (10)

  1. 一种移动终端的天线装置，其特征在于，包括：封闭无断点的金属中框、作为主地的金属板、第一金属走线和第二金属走线；
    其中，所述金属中框包括连接成框形两个侧框、一顶框及一底框；所述顶框的两端分别连接至两个所述侧框的顶端，所述底框的两端分别连接至两个所述侧框的底端；所述金属板的两侧边分别与所述金属中框的两个侧框无缝连接，所述金属板的底边与所述金属中框的底框形成第一窗口，所述第一金属走线和所述第二金属走线设置于所述第一窗口中，所述第一金属走线与所述金属中框连接，所述第二金属走线同时连接所述金属中框和所述金属板。
  2. 如权利要求1所述的天线，其特征在于，所述第一金属走线连接所述金属中框的底框，所述第二金属走线同时连接所述金属中框的底框和所述金属板的底边。
  3. 如权利要求1或2所述的天线，其特征在于，所述金属板的顶边与所述金属中框的顶框形成第二窗口。
  4. 如权利要求1所述的天线，其特征在于，所述第一金属走线和所述第二金属走线对称设置。
  5. 如权利要求4所述的天线，其特征在于，所述第一金属走线和所述第二金属走线位于同一平面上。
  6. 如权利要求1所述的天线，其特征在于，还包括：射频电路和接地电路，所述射频电路和所述接地电路设置于所述金属板的上方，所述射频电路与所述第二金属走线电连接，所述接地电路与所述金属板电连接。
  7. 如权利要求1所述的天线，其特征在于，所述第一天线走线和所述第 二金属走线包括回形走线。
  8. 一种移动终端，其特征在于，包括如权利要求1-7任意一项所述的天线装置。
  9. 如权利要求9所述的移动终端，其特征在于，还包括：背板、主电路板、电池和显示屏；其中，所述背板设置于所述金属板的下方且与所述金属板形成腔体，所述电池设置与所述腔体中，所述金属板的上方设置所述主电路板和所述显示屏。
  10. 如权利要求8或9所述的移动终端，其特征在于，所述背板为非金属材质。
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