WO2020024680A1 - 天线系统及移动终端 - Google Patents

天线系统及移动终端 Download PDF

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Publication number
WO2020024680A1
WO2020024680A1 PCT/CN2019/088277 CN2019088277W WO2020024680A1 WO 2020024680 A1 WO2020024680 A1 WO 2020024680A1 CN 2019088277 W CN2019088277 W CN 2019088277W WO 2020024680 A1 WO2020024680 A1 WO 2020024680A1
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WO
WIPO (PCT)
Prior art keywords
trace
antenna
antenna system
ground
wiring
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2019/088277
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English (en)
French (fr)
Inventor
许心影
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AAC Technologies Holdings Shenzhen Co Ltd
Original Assignee
AAC Acoustic Technologies Shenzhen Co Ltd
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 AAC Acoustic Technologies Shenzhen Co Ltd filed Critical AAC Acoustic Technologies Shenzhen Co Ltd
Publication of WO2020024680A1 publication Critical patent/WO2020024680A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0414—Substantially flat resonant element parallel to ground plane, e.g. patch antenna in a stacked or folded configuration
    • 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
    • H01Q1/12—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
    • H01Q1/245—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 means for shaping the antenna pattern, e.g. in order to protect user against rf exposure
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/328—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors between a radiating element and ground
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/378—Combination of fed elements with parasitic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Definitions

  • the utility model relates to the technical field of wireless communications, and in particular, to an antenna system and a mobile terminal.
  • a slit is usually set in the metal frame of the metal casing to meet the antenna frequency band performance requirements.
  • the width of such a slit is too large, it will affect the structural strength and appearance of the entire mobile phone; if the width is too small, it will cause mutual coupling between the two sides of the slit, and the smaller the width of the slit, the stronger the coupling, and
  • the purpose of the utility model is to provide an antenna system applied to a metal frame without a slit.
  • the antenna system provided by the utility model comprises a main board with a system ground, a metal frame arranged around the main board and closed loop without breakpoints, a first wiring, a second wiring, a third wiring, a feeding end and a feeding ground. end;
  • the system ground is electrically connected to the metal frame
  • the first trace is connected to the feeding end and is disposed at a distance from the metal frame so that the first trace forms a first antenna unit;
  • the second trace is connected to the ground feed terminal and is spaced from the first trace, and the two are at least partially opposed, so that the second trace and the first trace are coupled to each other to form a first trace.
  • One end of the third trace is connected between the feeding end and an end of the first trace, and the other end is connected to the metal frame, so that the first trace is electrically connected to the metal frame.
  • a third antenna unit is formed.
  • the first trace is disposed outside the second trace and is disposed around the second trace.
  • the first wiring includes an L-shaped first connection portion and an L-shaped first extension portion formed by bending and extending from one end of the first connection portion, and the other end of the first connection portion is connected to the first connection portion.
  • the feeding terminal is connected, the first connecting portion and the first extension portion surround a gap-shaped “mouth” structure;
  • the second wiring includes a long second connecting portion and a second connecting portion
  • An L-shaped second extension is formed by bending and extending one end of the second connection portion, and the other end of the second connection portion is connected to the ground feeding end;
  • the second wiring is disposed between the first connection portion and Inside the "mouth” structure surrounded by the first extension portion; the third wire is connected to the first connection portion.
  • the first trace, the second trace, and the third trace are disposed in the same plane, and the power feeding terminal and the ground feeding terminal are disposed on the same plane as the first wiring.
  • the plane is perpendicular to the plane.
  • the metal frame includes a top frame and two side frames opposite to the two ends of the top frame; a clearance area is provided between the system and the top frame, and the first wiring, the first The second track and the third track are arranged in the headroom; the system ground is connected to one of the side frames, and a gap is left between the system ground and the other side frame, and the gap Communicate with the headroom.
  • the third wiring is in a strip shape, which is connected to the top frame and is parallel to the side frame.
  • the antenna system further includes a bracket made of a non-metal material, and the first trace, the second trace, and the third trace are disposed in the clearance area through the bracket.
  • the first trace, the second trace, and the third trace are FPC antenna traces or LDS antenna traces on the surface of the bracket.
  • the working frequency band of the first antenna unit is 1575 MHz; the working frequency band of the second antenna unit is 2400-2500 MHz; and the working frequency band of the third antenna unit is 5150-5850 MHz.
  • the utility model also provides a mobile terminal, which includes the antenna system described above.
  • the antenna system and mobile terminal provided by the present utility model have the following beneficial effects:
  • a first antenna unit is formed by a first trace
  • a second antenna unit is formed by coupling the second trace and the first trace at a relatively spaced interval
  • a third trace is connected to the first trace and the metal frame to form a third
  • the antenna unit is used to realize the radiation of the antenna system.
  • the metal frame does not need to be provided with a breakpoint, and it is a closed loop structure, thereby increasing the overall structural strength of the mobile terminal and improving the metal frame in the prior art. Appearance defect of broken seam;
  • the metal frame does not need to have a slit, that is, the size of the precise matching slit is reduced, which greatly reduces the production cost and production time, reduces a large number of tolerance control areas, can improve the product yield, and does not reduce the actual antenna performance. .
  • FIG. 1 is a schematic structural diagram of a specific embodiment of an antenna system provided by the present utility model
  • FIG. 2 is a schematic partial structural diagram of the antenna system shown in FIG. 1;
  • FIG. 2 is a schematic partial structural diagram of the antenna system shown in FIG. 1;
  • FIG. 3 is a bottom view of the antenna system shown in FIG. 1;
  • FIG. 4 is a side view of the antenna system shown in FIG. 1;
  • FIG. 5 is a schematic diagram of a structure principle of the antenna system shown in FIG. 1;
  • FIG. 6 is a schematic diagram of a frequency band of an antenna system provided by the present utility model
  • FIG. 7 is a schematic diagram of antenna efficiency of an antenna system provided by the present invention.
  • an embodiment of the present invention provides a mobile terminal, such as a mobile phone, a personal digital assistant, and the like, where the mobile terminal includes an antenna system.
  • the antenna system includes a main board 1 with a system ground 10, a metal frame 2, which is arranged around the main board 1, and has a closed loop without breakpoints 2, a first wiring 3, a second wiring 4, a third wiring 5, Feed terminal 6 and ground terminal 7.
  • the system ground 10 may be a metal layer laid on the main board 1, and the system ground 10 is electrically connected to the metal frame 2 to ground the metal frame 2.
  • the metal frame 2 has a ring structure, and there are no breakpoints along the circumferential direction of the metal frame 2.
  • the antenna system further includes a feeding point provided on the main board 1 and a feeding point connected to the system ground 10. The feeding terminal 6 is connected to the feeding point, and the feeding terminal 7 is connected to the feeding point 7. The feed point is connected.
  • the first trace 3 is connected to the feeding end 6 and is disposed at a distance from the metal frame 2 so that the first trace 3 and the metal frame 2 are coupled to each other to form a first antenna unit.
  • the second trace 4 is connected to the ground feeding terminal 7 and is spaced from the first trace 3, and the two are at least partially opposite to each other. Generally, a portion of the second trace 4 that is far from the feeding terminal 7 is opposite to a portion of the first trace 3 that is far from the feeding terminal 6, so that the second trace 4 and the first
  • the traces 3 are coupled to each other to form a second antenna unit. Generally, the shapes of the first trace 3 and the second trace 4 are substantially the same.
  • One end of the third trace 5 is connected between the feeding end 6 and the end of the first trace 3, and the other end is connected to the metal frame 2 so that the first trace 3 and the The metal frame 2 is electrically connected to form a third antenna unit.
  • a first antenna unit is formed by the first trace 3
  • a second antenna unit is formed by coupling the second trace 4 and the first trace 3 at a relative distance
  • the second antenna unit is formed by the first
  • the three traces 5 connect the first traces 3 and the metal frame 2 to form a third antenna unit, so as to realize radiation of the antenna system.
  • the metal frame 2 does not need to be provided with a breakpoint, and it is a closed-loop structure, thereby increasing the overall structural strength of the mobile terminal, improving the appearance defects of the metal frame cracks in the prior art, and It is necessary to accurately match the size of the slit, which greatly reduces the production cost and man-hours, reduces a large number of tolerance control areas, can improve the product yield, and does not reduce the actual antenna performance.
  • the first trace 3, the second trace 4, the third trace 5, the power feeding terminal 6 and the ground feeding terminal 7 are all sheet structures. Wherein the first trace 3, the second trace 4 and the third trace 5 are disposed in the same plane, and the power feeding terminal 6 and the ground feeding terminal 7 are disposed on the same plane as the first The plane where trace 3 is located is perpendicular to the plane.
  • the first trace 3 is usually disposed outside the second trace 4 and is arranged around the second trace 4. Therefore, the first trace 3 and the second trace 4 are The shapes are roughly the same.
  • the first wiring 3 includes an L-shaped first connection portion 31 and an L-shaped first extension portion 32 formed by bending and extending from one end of the first connection portion 31.
  • the first connection portion 31 and the first extension portion 32 form a gap-shaped “mouth” structure, and the other end of the first connection portion 31 is connected to the feeding end 6;
  • the second wiring 4 includes a long strip shape A second connecting portion 41 and an L-shaped second extending portion 42 formed by bending and extending from one end of the second connecting portion 41; the other end of the second connecting portion 41 is connected to the ground feeding end 7;
  • the second trace 4 is disposed in a “mouth” shaped area surrounded by the first connecting portion 31 and the first extension portion 32.
  • the third wiring 5 is vertically connected to a middle position of the first connecting portion 31.
  • connection place between the system ground 10 and the metal frame 2 may be provided in one or more places.
  • the metal frame 2 includes a top frame 21 and two side frames 22 opposite to the two ends of the top frame 21.
  • a headroom 20 is provided between the system ground 10 and the top frame 21.
  • the first track 3, the second track 4, and the third track 5 are disposed in the headroom 20.
  • the system ground 10 is connected to one of the side frames 22, a gap 30 is left between the system ground 10 and the other side frame 22, and the gap 30 communicates with the headroom 20.
  • the third wiring 5 is in a strip shape, which is connected to the top frame 21 and parallel to the side frame 22.
  • the antenna system further includes a bracket (not shown) made of a non-metal material. If the bracket is a plastic part, the first wiring 3, the second wiring 4, and the third wiring 5 pass through the A bracket is disposed in the clearance area 20 to carry the first wiring 3, the second wiring 4 and the third wiring 5 through the bracket, which facilitates the installation of the antenna system in the mobile terminal.
  • FIG. 6 shows a schematic diagram of a frequency band of an antenna system provided by the present utility model.
  • the antenna system roughly forms three frequency ranges a, b, and c, where a refers to a frequency range of a first antenna unit, and a working frequency band thereof is 1550-1620MHz, b refers to the frequency range of the second antenna unit, its working frequency range is 2400-2500MHz, c refers to the frequency range of the third antenna unit, its working frequency range is 5150-5850MHz.
  • FIG. 7 shows a schematic diagram of the antenna efficiency of the antenna system provided by the present utility model. Test results show that the antenna system has an antenna efficiency of 65% in the entire operating frequency band (1550-1620MHz, 2400-2500MHz, and 5150-5850MHz). In the foregoing, the antenna system has good antenna performance.
  • the antenna system and mobile terminal provided by the present utility model have the following beneficial effects:
  • a first antenna unit is formed by a first trace
  • a second antenna unit is formed by coupling the second trace and the first trace at a relatively spaced interval
  • a third trace is connected to the first trace and the metal frame to form a third
  • the antenna unit is used to realize the radiation of the antenna system.
  • the metal frame does not need to be provided with a breakpoint, and it is a closed loop structure, thereby increasing the overall structural strength of the mobile terminal and improving the metal frame in the prior art. Appearance defect of broken seam;
  • the metal frame does not need to have a slit, that is, the size of the precise matching slit is reduced, which greatly reduces the production cost and production time, reduces a large number of tolerance control areas, can improve the product yield, and does not reduce the actual antenna performance. .

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephone Set Structure (AREA)
  • Support Of Aerials (AREA)

Abstract

本实用新型提供了一种天线系统，其包括具有系统地的主板、环绕所述主板设置且闭环无断点的金属边框、第一走线、第二走线、第三走线、馈电端和馈地端；所述系统地与所述金属边框电连接；所述第一走线与所述馈电端连接并与所述金属边框相对间隔设置，以使所述第一走线形成第一天线单元；所述第二走线与所述馈地端连接并与所述第一走线间隔设置，且二者至少部分相对，以使所述第二走线与所述第一走线相互耦合形成第二天线单元；所述第三走线一端连接于所述馈电端与所述第一走线的末端之间，另一端与所述金属边框连接，以使所述第一走线与所述金属边框电连接形成第三天线单元。本实用新型的天线系统使金属边框实现了无断缝。

Description

天线系统及移动终端 技术领域
本实用新型涉及无线通信技术领域，尤其涉及一种天线系统及移动终端。
 背景技术
目前，具有金属壳体的通信设备如手机，已经成为各大品牌手机的主流结构。在设计手机的天线时，通常在金属壳体的金属边框设置断缝，以满足天线频段性能要求。然而，这种断缝的宽度太大会影响整个手机的结构强度和外观质感；宽度太小，又会造成断缝两侧的部分产生相互耦合，且断缝的宽度越小，耦合越强，会严重影响天线性能。显然，这种断缝式的金属壳体很难同时满足手机的结构强度、外观质感以及天线性能的要求。
因此，实有必要提供一种新的天线解决上述问题。
 技术问题
本实用新型的目的在于提供一种应用于无断缝金属边框的天线系统。
 技术解决方案
本实用新型提供的天线系统，包括具有系统地的主板、环绕所述主板设置且闭环无断点的金属边框、第一走线、第二走线、第三走线、馈电端和馈地端；
所述系统地与所述金属边框电连接；
所述第一走线与所述馈电端连接并与所述金属边框相对间隔设置，以使所述第一走线形成第一天线单元；
所述第二走线与所述馈地端连接并与所述第一走线间隔设置，且二者至少部分相对，以使所述第二走线与所述第一走线相互耦合形成第二天线单元；
所述第三走线一端连接于所述馈电端与所述第一走线的末端之间，另一端与所述金属边框连接，以使所述第一走线与所述金属边框电连接形成第三天线单元。
优选地所述第一走线设置在所述第二走线的外侧，且环绕所述第二走线设置。
优选地，所述第一走线包括L型的第一连接部和自所述第一连接部一端弯折延伸形成的呈L型的第一延伸部，所述第一连接部另一端与所述馈电端连接，所述第一连接部与所述第一延伸部围成具缺口的“口”字型结构；所述第二走线包括长条状的第二连接部和自所述第二连接部一端弯折延伸形成的呈L型的第二延伸部，所述第二连接部另一端与所述馈地端连接；所述第二走线设置于所述第一连接部和所述第一延伸部围成的“口”字型结构内；所述第三走线与所述第一连接部连接。
优选地，所述第一走线、所述第二走线和所述第三走线设置在同一平面内，所述馈电端和所述馈地端设置在与所述第一走线所在平面相垂直的平面内。
优选地，所述金属边框包括顶框和相对设置于所述顶框两端的两侧边框；所述系统地与所述顶框之间设有净空区，所述第一走线、所述第二走线和所述第三走线设置于所述净空区；所述系统地与其中一所述侧边框连接，所述系统地与另一所述侧边框之间留有缝隙，所述缝隙与所述净空区连通。
优选地，所述第三走线呈长条状，其与所述顶框连接并平行于所述侧边框。
优选地，所述天线系统还包括由非金属材质制成的支架，所述第一走线、所述第二走线和所述第三走线通过所述支架设置于所述净空区。
优选地，所述第一走线、所述第二走线和所述第三走线为位于所述支架表面的FPC天线走线或LDS天线走线。
优选地，所述第一天线单元的工作频段为1575MHz；所述第二天线单元的工作频段为2400-2500MHz；所述第三天线单元的工作频段为5150-5850MHz。
本实用新型还提供一种移动终端，其包括上文所述的的天线系统。
 有益效果
与相关技术相比，本实用新型提供的天线系统及移动终端具有如下有益效果：
1）通过第一走线形成第一天线单元，通过第二走线与第一走线相对间隔设置耦合形成第二天线单元，并通过第三走线连接第一走线和金属边框形成第三天线单元，以实现天线系统的辐射，在这种天线系统中，所述金属边框不需要设置断点，其为闭环结构，从而增加了移动终端整体的结构强度，改善了现有技术中金属边框断缝的外观缺陷；
2）由于金属边框不需要开设断缝，即减少了精确匹配断缝尺寸，从而大大降低了生产成本和生产工时，减少了大量公差管控区域，能够提高产品的良品率，且实际天线性能没有降低。
 附图说明
图1为本实用新型所提供的天线系统一种具体实施例的结构示意图；
图2为图1所示天线系统的局部结构示意图；
图3为图1所示天线系统的底视图；
图4为图1所示天线系统的侧视图；
图5为图1所示天线系统的结构原理简图；
图6为本实用新型所提供的天线系统的频段示意图；
图7为本实用新型所提供的天线系统的天线效率示意图。
 本发明的实施方式
下面将结合本实用新型实施例中的附图，对本实用新型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实用新型一部份实施例，而不是全部的实施例。
如图1-图5所示，本实用新型实施例提供一种移动终端，如手机、个人数字助理等，其中该移动终端包括天线系统。
具体地，所述天线系统包括具有系统地10的主板1、环绕所述主板1设置且闭环无断点的金属边框2、第一走线3、第二走线4、第三走线5、馈电端6和馈地端7。通常所述系统地10可以为铺设于所述主板1上的金属层，所述系统地10与所述金属框2电连接，以使所述金属框2接地。其中所述金属边框2呈环状结构，沿金属边框2的周向没有断点。所述天线系统还包括设于所述主板1上的馈电点和与所述系统地10连接的馈地点，所述馈电端6与所述馈电点连接，所述馈地端7与所述馈地点连接。
其中所述第一走线3与所述馈电端6连接并与所述金属边框2相对间隔设置，以使所述第一走线3与所述金属边框2相互耦合形成第一天线单元。
所述第二走线4与所述馈地端7连接并与所述第一走线3间隔设置，且二者至少部分相对。一般地，第二走线4远离所述馈地端7的部分与所述第一走线3远离所述馈电端6的部分相对，以使所述第二走线4与所述第一走线3相互耦合形成第二天线单元。通常所述第一走线3与所述第二走线4的形状大致相同。
所述第三走线5一端连接于所述馈电端6与所述第一走线3的末端之间，另一端与所述金属边框2连接，以使所述第一走线3与所述金属边框2电连接形成第三天线单元。
上述天线系统中，通过所述第一走线3形成第一天线单元，通过所述第二走线4与所述第一走线3相对间隔设置耦合形成第二天线单元，并通过所述第三走线5连接所述第一走线3和所述金属边框2形成第三天线单元，以实现天线系统的辐射。在这种天线系统中，所述金属边框2不需要设置断点，其为闭环结构，从而增加了移动终端整体的结构强度，改善了现有技术中金属边框断缝的外观缺陷，而且由于不需要精确匹配断缝尺寸，大大降低了生产成本和生产工时，减少了大量公差管控区域，能够提高产品的良品率，且实际天线性能没有降低。
所述第一走线3、所述第二走线4、所述第三走线5、所述馈电端6和所述馈地端7均为片状结构。其中所述第一走线3、所述第二走线4和所述第三走线5设置在同一平面内，所述馈电端6和所述馈地端7设置在与所述第一走线3所在平面相垂直的平面内。
通常将所述第一走线3设置在所述第二走线4的外侧，且环绕所述第二走线4设置，因此，所述第一走线3与所述第二走线4的形状大致相同。具体地，所述第一走线3包括L型的第一连接部31和自所述第一连接部31一端弯折延伸形成的呈L型的第一延伸部32，所述第一连接部31与所述第一延伸部32围成具缺口的“口”字型结构，所述第一连接部31另一端与所述馈电端6连接；所述第二走线4包括长条状的第二连接部41和自所述第二连接部41一端弯折延伸形成的呈L型的第二延伸部42，所述第二连接部41另一端与所述馈地端7连接；所述第二走线4设置于所述第一连接部31和所述第一延伸部32围成的“口”字型区域内。所述第三走线5垂直连接于所述第一连接部31的中部位置。
所述系统地10与所述金属边框2的连接处可以设置为一处或多处。可选地，所述金属边框2包括顶框21和相对设置于所述顶框21两端的两侧边框22。所述系统地10与所述顶框21之间设有净空区20，所述第一走线3、所述第二走线4和所述第三走线5设置于所述净空区20。所述系统地10与其中一所述侧边框22连接，所述系统地10与另一所述侧边框22之间留有缝隙30，所述缝隙30与所述净空区20连通。优选地，所述第三走线5呈长条状，其与所述顶框21连接并平行于所述侧边框22。由于所述第一走线3、所述第二走线4和所述第三走线5通常为FPC（柔性电路板）天线走线或LDS（激光直接成型技术）天线走线，因此所述天线系统还包括由非金属材质制成的支架（图未示），如支架为塑胶件，所述第一走线3、所述第二走线4和所述第三走线5通过所述支架设置于所述净空区20，以通过所述支架承载所述第一走线3、所述第二走线4和所述第三走线5，便于天线系统在移动终端中的安装。
图6示出了本实用新型所提供的天线系统的频段示意图，该天线系统大致形成a、b、c三个频段范围，其中a所指的是第一天线单元的频段范围，其工作频段为1550-1620MHz，b所指的是第二天线单元的频段范围，其工作频段为2400-2500MHz，c所指的是第三天线单元的频段范围，其工作频段为5150-5850MHz。
图7示出了本实用新型所提供的天线系统的天线效率示意图，测试结果显示，所述天线系统在整个工作频段（1550-1620MHz、2400-2500MHz及5150-5850MHz）内，天线效率在65%以上，说明所述天线系统天线性能好。
与相关技术相比，本实用新型提供的天线系统及移动终端具有如下有益效果：
1）通过第一走线形成第一天线单元，通过第二走线与第一走线相对间隔设置耦合形成第二天线单元，并通过第三走线连接第一走线和金属边框形成第三天线单元，以实现天线系统的辐射，在这种天线系统中，所述金属边框不需要设置断点，其为闭环结构，从而增加了移动终端整体的结构强度，改善了现有技术中金属边框断缝的外观缺陷；
2）由于金属边框不需要开设断缝，即减少了精确匹配断缝尺寸，从而大大降低了生产成本和生产工时，减少了大量公差管控区域，能够提高产品的良品率，且实际天线性能没有降低。
以上所述仅为本实用新型的实施例，并非因此限制本实用新型的专利范围，凡是利用本实用新型说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其它相关的技术领域，均同理包括在本实用新型的专利保护范围内。

Claims (10)

  1. 一种天线系统，其特征在于，包括具有系统地的主板、环绕所述主板设置且闭环无断点的金属边框、第一走线、第二走线、第三走线、馈电端和馈地端；
    所述系统地与所述金属边框电连接；
    所述第一走线与所述馈电端连接并与所述金属边框相对间隔设置，以使所述第一走线形成第一天线单元；
    所述第二走线与所述馈地端连接并与所述第一走线间隔设置，且二者至少部分相对，以使所述第二走线与所述第一走线相互耦合形成第二天线单元；
    所述第三走线一端连接于所述馈电端与所述第一走线的末端之间，另一端与所述金属边框连接，以使所述第一走线与所述金属边框电连接形成第三天线单元。
  2. 根据权利要求1所述的天线系统，其特征在于，所述第一走线设置在所述第二走线的外侧，且环绕所述第二走线设置。
  3. 根据权利要求2所述的天线系统，其特征在于，所述第一走线包括L型的第一连接部和自所述第一连接部一端弯折延伸形成的呈L型的第一延伸部，所述第一连接部另一端与所述馈电端连接，所述第一连接部与所述第一延伸部围成具缺口的“口”字型结构；
    所述第二走线包括长条状的第二连接部和自所述第二连接部一端弯折延伸形成的呈L型的第二延伸部，所述第二连接部另一端与所述馈地端连接；
    所述第二走线设置于所述第一连接部和所述第一延伸部围成的“口”字型结构内；
    所述第三走线与所述第一连接部连接。
  4. 根据权利要求1或3所述的天线系统，其特征在于，所述第一走线、所述第二走线和所述第三走线设置在同一平面内，所述馈电端和所述馈地端设置在与所述第一走线所在平面相垂直的平面内。
  5. 根据权利要求1所述的天线系统，其特征在于，所述金属边框包括顶框和相对设置于所述顶框两端的两侧边框；
    所述系统地与所述顶框之间设有净空区，所述第一走线、所述第二走线和所述第三走线设置于所述净空区；
    所述系统地与其中一所述侧边框连接，所述系统地与另一所述侧边框之间留有缝隙，所述缝隙与所述净空区连通。
  6. 根据权利要求5所述的天线系统，其特征在于，所述第三走线呈长条状，其与所述顶框连接并平行于所述侧边框。
  7. 根据权利要求5所述的天线系统，其特征在于，所述天线系统还包括由非金属材质制成的支架，所述第一走线、所述第二走线和所述第三走线通过所述支架设置于所述净空区。
  8. 根据权利要求7所述的天线系统，其特征在于，所述第一走线、所述第二走线和所述第三走线为位于所述支架表面的FPC天线走线或LDS天线走线。
  9. 根据权利要求1所述的天线系统，其特征在于，所述第一天线单元的工作频段为1550-1620MHz；所述第二天线单元的工作频段为2400-2500MHz；所述第三天线单元的工作频段为5150-5850MHz。
  10. 一种移动终端，其特征在于，包括权利要求1-9任一项所述的天线系统。
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