WO2020140168A1 - 馈电耦合式天线结构及移动终端 - Google Patents

馈电耦合式天线结构及移动终端 Download PDF

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Publication number
WO2020140168A1
WO2020140168A1 PCT/CN2018/125933 CN2018125933W WO2020140168A1 WO 2020140168 A1 WO2020140168 A1 WO 2020140168A1 CN 2018125933 W CN2018125933 W CN 2018125933W WO 2020140168 A1 WO2020140168 A1 WO 2020140168A1
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antenna
feed
coupled
antenna portion
frame
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PCT/CN2018/125933
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English (en)
French (fr)
Inventor
邱孝钧
朱博
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瑞声精密制造科技(常州)有限公司
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Priority to PCT/CN2018/125933 priority Critical patent/WO2020140168A1/zh
Publication of WO2020140168A1 publication Critical patent/WO2020140168A1/zh

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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
    • 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

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  • the invention relates to the technical field of mobile phone wireless communication, in particular to a feed-coupled antenna structure and a mobile terminal.
  • mobile phones also known as mobile phones and wireless phones
  • mobile phones are a kind of communication tool, which can be used in a large range and are easy to carry.
  • smart phones With the progress of society and the development of science and technology at any time, smart phones have almost spread to every household in our country and become an indispensable communication terminal for people.
  • wireless communication technology With the advancement of wireless communication technology, the demand for mobile phone functions is also increasing. Since the radio waves of wireless communication must be up-converted and carrier-waved in order to do effective multiplex transmission, it is necessary to perform these actions with the help of an antenna, which is an important element of mobile phones.
  • One of the objects of the present invention is to provide a feed-coupled antenna structure.
  • a feed-coupled antenna structure is applied to a mobile terminal.
  • the mobile terminal includes a metal middle frame and a circuit board.
  • the metal middle frame includes an integrally provided main body portion and a frame.
  • the frame is provided on the main body portion.
  • a feeding point is provided on the circuit board, characterized in that: a sealing groove in the direction of extension of the frame is provided at the main body portion adjacent to the frame, and one end of the frame corresponding to the closing groove is provided
  • a fracture communicating with the closed slot is opened, and a frame adjacent to the closed slot forms a radiation section, the radiation section includes an opening end adjacent to the fracture and an end corresponding to the closed slot away from the fracture
  • the feed-coupled antenna structure includes the radiation section and a first antenna section and a second antenna section spaced apart from the radiation section, one end of the second antenna section is connected to the feed point, The other end is coupled to the first antenna part, the end of the first antenna part away from the second antenna part is connected to the open end of the radiation section, the second
  • the first antenna portion and the second antenna portion extend alternately along the extending direction of the radiation section, the first antenna portion is adjacent to the open end, and the second antenna portion is adjacent to the Ground terminal.
  • the first antenna portion and the second antenna portion are spaced apart in a direction perpendicular to the circuit board.
  • the orthographic projections of the first antenna portion and the second antenna portion on the circuit board at least partially coincide.
  • the feed-coupled antenna structure further includes a metal connection portion connecting the first antenna portion and the radiation section.
  • the feed-coupled antenna structure further includes a feed spring connecting the second antenna portion and the feed point.
  • the feed-coupled antenna structure further includes a bracket erected on the circuit board, the first antenna portion is received on a surface of the bracket away from the circuit board, and the second antenna portion is received The bracket faces the surface of the circuit board.
  • the beneficial effect of the present invention is that the frame of the present invention forms an antenna loop with the first antenna part and the second antenna part, the antenna occupies a small space, and the bandwidth is wide.
  • FIG. 1 is a structural diagram of a mobile terminal with a feed-coupled antenna structure of the present invention
  • FIG. 2 is a structural diagram of an antenna loop of the present invention
  • Figure 3 is a partial enlarged view of area A of Figure 2;
  • FIG. 4 is a schematic side view of the bracket, the first antenna portion and the second antenna portion of the present invention.
  • FIG. 5 is a schematic diagram of the antenna of the present invention.
  • FIG. 6 is a performance diagram of the feed-coupled antenna structure of the present invention.
  • the present invention has a feed-coupled antenna structure, applied to the mobile terminal 1, the mobile terminal is usually a communication mobile phone, including a mobile phone housing 1, the mobile phone housing 1 is generally thin rectangular In order to be beautiful and easy to grip, its four corners are usually set as rounded corners.
  • the inside of the mobile phone housing is an accommodating cavity, which can accommodate the necessary devices to realize the functions required by the mobile phone, such as circuit boards.
  • the mobile phone case 1 is formed with a metal middle frame 11, which includes a main body 111 and a frame 112.
  • the main body 111 and the frame 112 are integrally provided, which is more integrated and can save more space.
  • the frame 112 is provided on the periphery of the main body 111.
  • the mobile terminal 1 includes a circuit board 12, and a feeding point 121 is provided on the circuit board 12, and the feeding point 121 feeds an antenna.
  • a sealing groove 113 consistent with the extending direction of the frame 112 is provided at the main body portion 111 adjacent to the frame 112, and an end of the frame 112 corresponding to the closing groove 113 is provided with a break 114 communicating with the closing groove 113
  • a frame adjacent to the closed groove 113 forms a radiating section 1121.
  • the radiating section 1121 includes an opening end a adjacent to the break 114 and a grounding end b corresponding to the end of the closed groove 113 away from the break 114.
  • the feed-coupled antenna structure includes the radiation section 1121 and a first antenna section 13 and a second antenna section 14 spaced apart from the radiation section 1121, one end of the second antenna section 14 and the feed point 121 is connected, and the other end is coupled to the first antenna portion 13, the end of the first antenna portion 13 away from the second antenna portion 14 is connected to the open end of the radiation section 1121, and the second antenna portion 14
  • the first antenna portion 13 and the radiation section 1121 together form a loop antenna.
  • the first antenna portion 13 and the second antenna portion 14 extend alternately along the extending direction of the radiation section 1121, the first antenna portion 13 is adjacent to the open end, and the second antenna portion 14 is adjacent to the ground terminal.
  • the first antenna portion 13 and the second antenna portion 14 are spaced apart in the height direction to form a pitch, and the height direction is the direction perpendicular to the circuit board.
  • a specific coupling pitch is formed between the first antenna portion 13 and the second antenna portion 14, and the size of this pitch distance can be adjusted, preferably 0.9 mm.
  • the provision of the closed groove 113 in the metal middle frame 11 is therefore sufficient for the structural strength of the mobile terminal 1, or the structural strength of the mobile terminal 1 is appropriately strengthened during production.
  • the shape of the closed groove 113 is, for example, a rectangular parallelepiped. In the present invention, the length is preferably 10 mm and the width is 1 mm.
  • the orthographic projections of the first antenna portion 13 and the second antenna portion 14 on the circuit board 12 at least partially overlap, that is, the projections in the height direction at least partially overlap, to achieve a better coupling relationship.
  • the feed-coupled antenna structure of the present invention further includes a metal connection portion 15, wherein the first antenna portion 13 passes through the radiation section 1121 through the metal connection portion 15.
  • the feed spring 16 is also included. The feed spring 16 is used to connect the second antenna portion 14 and the feed point 121 to feed the second antenna portion 14.
  • the mobile terminal 1 further includes a bracket 17, which is a component of a feed-coupled antenna structure, the first antenna portion 13 is received on a surface of the bracket 17 away from the circuit board 12, and the second antenna portion 14 is received by the surface of the bracket 17 facing the circuit board 12.
  • a clearance area 122 is provided on the circuit board 12, and the orthographic projections of the first antenna portion 13 and the second antenna portion 14 on the circuit board 12 are located in the clearance area 122.
  • the performance diagram of the antenna is shown in Fig. 6.
  • the antenna has excellent performance in the frequency band of 3.3-5 GHz.
  • the present invention also provides a mobile terminal including the feed-coupled antenna structure described in the present invention.

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  • Telephone Set Structure (AREA)
  • Support Of Aerials (AREA)

Abstract

本发明提供了馈电耦合式天线结构，应用于移动终端，移动终端包括金属中框及电路板，金属中框包括主体部及边框，电路板上设有馈电点，主体部邻接边框处设封闭槽，边框上设有断缝，邻接封闭槽的边框形成一辐射段，辐射段包括开口端和接地端，馈电耦合式天线结构包括辐射段及与辐射段间隔设置的第一天线部和第二天线部，第二天线部一端与馈电点连接，另一端与第一天线部耦合，第一天线部远离第二天线部的一端与辐射段的开口端连接，第二天线部、第一天线部及辐射段共同形成一回路天线。本发明的边框与第一天线部、第二天线部形成天线回路，天线占用空间小，带宽宽。

Description

馈电耦合式天线结构及移动终端 【技术领域】
本发明涉及一种手机无线通信技术领域，尤其涉及一种馈电耦合式天线结构及移动终端。
【背景技术】
目前，手机又称移动电话、无线电话，是一种通讯工具，可以较大范围使用并且携带方便。随时社会的进步和科技的发展，智能手机已经几乎普及到我国家家户户中，成为人们不可或缺的通讯终端。随着无线通信技术的进补，人们对移动电话功能的需求也日益增加。由于无线通信的电波必须升频、载波，才可以做有效的多工传送，因此需要借助天线进行这些动作，天线是手机的重要元件。
现有技术的手机天线环境越来越差，如果使用传统式的天线设计方式，例如仅用馈电金属边框加上部分走线，或者直接在支架上利用PIFA、Monopole、Loop、等形式来设计天线，会面临一个问题就是带宽不足，天线使用面积宽，性能不好，由于是支持5GNR中的n77、n79频段，这些频段分别需要900MHz和600MHz的带宽，要能够包含这些频段的设计还要兼顾性能是一个很大的困难点。
因此，有必要提供一种具有使用面积小、带宽宽、性能高的天线结构及手机。
【发明内容】
本发明的目的之一在于提供馈电耦合式天线结构。
本发明目的之一的技术方案如下：
一种馈电耦合式天线结构，应用于移动终端，所述移动终端包括金属中框及电路板，所述金属中框包括一体设置的主体部及边框，所述边框设于所述主体部的周缘，所述电路板上设有馈电点，其特征在于：所述主体 部邻接所述边框处设有一与所述边框延伸方向一致的封闭槽，所述边框上对应所述封闭槽的一端开设有一与所述封闭槽连通的断缝，邻接所述封闭槽的边框形成一辐射段，所述辐射段包括紧邻所述断缝的开口端和对应所述封闭槽远离所述断缝一端的接地端，所述馈电耦合式天线结构包括所述辐射段及与所述辐射段间隔设置的第一天线部和第二天线部，所述第二天线部一端与所述馈电点连接，另一端与所述第一天线部耦合，所述第一天线部远离所述第二天线部的一端与所述辐射段的开口端连接，所述第二天线部、所述第一天线部及所述辐射段共同形成一回路天线。
作为一种改进，所述第一天线部和所述第二天线部沿所述辐射段的延伸方向交错延伸，所述第一天线部邻近所述开口端，所述第二天线部邻近所述接地端。
作为一种改进，所述第一天线部和所述第二天线部在垂直于所述电路板的方向间隔设置。
作为一种改进，所述第一天线部和所述第二天线部在所述电路板上的正投影至少部分重合。
作为一种改进，所述馈电耦合式天线结构还包括连接所述第一天线部和所述辐射段的金属连接部。
作为一种改进，所述馈电耦合式天线结构还包括连接所述第二天线部和所述馈电点的馈电弹片。
作为一种改进，所述馈电耦合式天线结构还包括架设于所述电路板的支架，所述第一天线部承接于所述支架远离所述电路板的表面，所述第二天线部承接于所述支架朝向所述电路板的表面。
本发明的有益效果在于：本发明的边框与第一天线部、第二天线部形成天线回路，天线占用空间小，带宽宽。
【附图说明】
图1为本发明的有馈电耦合式天线结构的移动终端的结构图；
图2为本发明的天线回路的结构图；
图3为图2的A区域局部放大图；
图4为本发明的支架、第一天线部及第二天线部的侧视示意图；
图5为本发明的天线原理图；
图6为本发明的馈电耦合式天线结构的性能图。
【具体实施方式】
下面结合附图和实施方式对本发明作进一步说明。
实施例一
结合图1至图5所示，本发明的具有馈电耦合式天线结构，应用于移动终端1，移动终端通常为通信手机，包括有手机壳体1，手机壳体1大致为较薄的长方形，为了美观以及方便抓握，其四个边角通常设置为圆角结构。，手机壳体内部为一个容纳腔，可以容置实现手机所需功能的必要器件，例如电路板等。
手机壳体1形成有金属中框11，金属中框11包括有主体部111和边框112，主体部111和边框112一体设置，更加整体化，同时可以更加节省空间。边框112设置于主体部111的周缘。
移动终端1包括电路板12，电路板12上设置有馈电点121，馈电点121给天线馈电。
主体部111邻接所述边框112处设有一与所述边框112延伸方向一致的封闭槽113，所述边框112上对应所述封闭槽113的一端开设有一与所述封闭槽113连通的断缝114，邻接所述封闭槽113的边框形成一辐射段1121，所述辐射段1121包括紧邻所述断缝114的开口端a和对应所述封闭槽113远离所述断缝114一端的接地端b。所述馈电耦合式天线结构包括所述辐射段1121及与所述辐射段1121间隔设置的第一天线部13和第二天线部14，所述第二天线部14一端与所述馈电点121连接，另一端与所述 第一天线部13耦合，所述第一天线部13远离所述第二天线部14的一端与所述辐射段1121的开口端连接，所述第二天线部14、所述第一天线部13及所述辐射段1121共同形成一回路天线。
作为优选的实施方式，第一天线部13和所述第二天线部14沿所述辐射段1121的延伸方向交错延伸，所述第一天线部13邻近所述开口端，所述第二天线部14邻近所述接地端。
第一天线部13和所述第二天线部14在高度方向上间隔设置形成间距，所述高度方向即为垂直于所述电路板的方向。第一天线部13与第二天线部14之间形成特定的耦合间距，这个间距距离大小可以调节，优选为0.9mm。在金属中框11设置封闭槽113因此对移动终端1的结构强度足够，或者在生产时适当加强移动终端1的结构强度。封闭槽113的形状例如为长方体，在本发明中，优选其长度为10mm，宽度为1mm。
第一天线部13和所述第二天线部14在所述电路板12上的正投影至少部分重合，也就是高度方向上的投影至少部分重叠，实现更好的耦合关系。
本发明的馈电耦合式天线结构还包括金属连接部15，其中第一天线部13通过金属连接部15所述辐射段1121。还包括馈电弹片16，该馈电弹片16用于连接第二天线部14和馈电点121，以实现对第二天线部14馈电。
移动终端1还包括有支架17，该支架属于馈电耦合式天线结构的一个部件，所述第一天线部13承接于所述支架17远离所述电路板12的表面，所述第二天线部14承接于所述支架17朝向所述电路板12的表面。
在电路板12上设有净空区122，所述第一天线部13和所述第二天线部14在所述电路板12上的正投影位于所述净空区122内。
天线的性能图参见图6，该天线在3.3-5GHz频段内都具有较优的性能。
本发明还提供一种移动终端，其包括本发明所述的馈电耦合式天线结构。
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)

  1. 一种馈电耦合式天线结构，应用于移动终端，所述移动终端包括金属中框及电路板，所述金属中框包括一体设置的主体部及边框，所述边框设于所述主体部的周缘，所述电路板上设有馈电点，其特征在于：所述主体部邻接所述边框处设有一与所述边框延伸方向一致的封闭槽，所述边框上对应所述封闭槽的一端开设有一与所述封闭槽连通的断缝，邻接所述封闭槽的边框形成一辐射段，所述辐射段包括紧邻所述断缝的开口端和对应所述封闭槽远离所述断缝一端的接地端，所述馈电耦合式天线结构包括所述辐射段及与所述辐射段间隔设置的第一天线部和第二天线部，所述第二天线部一端与所述馈电点连接，另一端与所述第一天线部耦合，所述第一天线部远离所述第二天线部的一端与所述辐射段的开口端连接，所述第二天线部、所述第一天线部及所述辐射段共同形成一回路天线。
  2. 根据权利要求1所述的馈电耦合式天线结构，其特征在于：所述第一天线部和所述第二天线部沿所述辐射段的延伸方向交错延伸，所述第一天线部邻近所述开口端，所述第二天线部邻近所述接地端。
  3. 根据权利要求2所述的馈电耦合式天线结构，其特征在于：所述第一天线部和所述第二天线部在垂直于所述电路板的方向间隔设置。
  4. 根据权利要求3所述的馈电耦合式天线结构，其特征在于：所述第一天线部和所述第二天线部在所述电路板上的正投影至少部分重合。
  5. 根据权利要求4所述的馈电耦合式天线结构，其特征在于：所述馈电耦合式天线结构还包括连接所述第一天线部和所述辐射段的金属连接部。
  6. 根据权利要求4所述的馈电耦合式天线结构，其特征在于：所述馈电耦合式天线结构还包括连接所述第二天线部和所述馈电点的馈电弹片。
  7. 根据权利要求1所述的馈电耦合式天线结构，其特征在于：所述馈电耦合式天线结构还包括架设于所述电路板的支架，所述第一天线部承接于所述支架远离所述电路板的表面，所述第二天线部承接于所述支架朝向所述电路板的表面。
  8. 根据权利要求1所述的馈电耦合式天线结构，其特征在于：所述电路板上设有净空区，所述第一天线部和所述第二天线部在所述电路板上的正投影位于所述净空区内。
  9. 一种移动终端，其特征在于：权利要求1-8所述的馈电耦合式天线结构。
PCT/CN2018/125933 2018-12-30 2018-12-30 馈电耦合式天线结构及移动终端 WO2020140168A1 (zh)

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