WO2014029156A1 - 一种移动通信终端天线装置 - Google Patents

一种移动通信终端天线装置 Download PDF

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Publication number
WO2014029156A1
WO2014029156A1 PCT/CN2012/082485 CN2012082485W WO2014029156A1 WO 2014029156 A1 WO2014029156 A1 WO 2014029156A1 CN 2012082485 W CN2012082485 W CN 2012082485W WO 2014029156 A1 WO2014029156 A1 WO 2014029156A1
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WIPO (PCT)
Prior art keywords
radiator
metal frame
communication terminal
mobile communication
disposed
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PCT/CN2012/082485
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English (en)
French (fr)
Inventor
赵宁
刘永山
冯斌
唐海军
罗益州
顾亮
李彦涛
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Publication of WO2014029156A1 publication Critical patent/WO2014029156A1/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
    • 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
    • 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
    • H01Q5/385—Two or more parasitic elements
    • 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 present invention relates to a mobile communication terminal antenna device, and in particular to a coupled feed type monopole antenna device applied to a mobile phone.
  • the present invention provides a mobile communication terminal antenna device, which is in the form of a coupled feed-type monopole antenna, which has the advantages of a low frequency bandwidth and a good antenna performance. At the same time, the problem of coexistence of antennas and large metal parts is well solved.
  • a mobile communication terminal antenna device The utility model comprises a metal frame disposed on a casing of the mobile communication terminal, an antenna carrier, a circuit board disposed in the mobile communication terminal, the circuit board is provided with a radio frequency feed of the antenna device, and the antenna device is disposed on the antenna carrier a first radiator and a second radiator, wherein the first radiator is provided with a feeding point and a grounding point, and the feeding point is connected to the RF feeding source through a conductive connector, the grounding point Connected to the metal frame through a conductive connector for forming a monopole antenna; each of the two ends of the second radiator is provided with a grounding point, and a grounding point is connected to the ground on the circuit board through the conductive connector, and the other The grounding point is connected to the metal frame through a conductive connector for forming a double-grounded parasitic antenna branch of the antenna device; the metal frame is connected to a main ground on the circuit board, and one or more slits
  • the first radiator a coupling slot for changing the feeding mode of the RF feed from direct feeding to coupling feeding; the coupling slot is disposed between the grounding point and the feeding point on the first radiator, and the coupling slot is close to One end of the grounding point.
  • the second radiator has a rectangular shape as a whole and is disposed on an antenna carrier on a side close to a feeding point on the first radiator.
  • the metal frame is disposed on The front side of the display screen of the mobile communication terminal includes an upper metal decorative part, a lower metal decorative part, a left metal frame strip and a right metal frame strip disposed on the front side of the mobile communication terminal; the left metal frame strip and the right metal frame strip are both Connected to the main ground on the circuit board, The upper metal decorative piece, the right metal frame strip and the lower metal decorative piece are sequentially connected, and the slit is disposed between the left metal frame strip and the lower metal decorative piece adjacent to the second radiator.
  • the invention has the advantages of ultra-low bandwidth, wide antenna performance, high efficiency, and the like, and also solves the problem of coexistence of large metal parts and antennas of the mobile communication terminal, and better guarantees in shape.
  • FIG. 1 is a schematic structural view of a metal frame on a mobile phone case in an embodiment of the present invention
  • FIG. 2 is a schematic structural view of an antenna device disposed on a back of a mobile phone according to an embodiment of the present invention
  • Fig. 3 is a perspective view showing the structure of the antenna device when the mobile phone case is removed in the embodiment of the present invention.
  • a mobile phone antenna device includes a metal frame 1 disposed on a mobile phone case, an antenna carrier 5 , and a circuit board 4 disposed in the mobile phone.
  • a radio frequency feed 401 is provided on the antenna carrier 5, and the first radiator 201 and the second radiator 202 of the antenna device are disposed on the antenna carrier 5, wherein the first radiator 201 is provided with a feeding point and a connection.
  • the feeding point is connected to the RF feed 401 through a conductive connector, and the grounding point is connected to the metal frame 1 through a conductive connector for forming a monopole antenna; the second radiator 202
  • Each of the two ends is provided with a grounding point, a grounding point is connected to the ground on the circuit board 4 through a conductive connector, and another grounding point is connected to the metal frame 1 through a conductive connector for forming a double grounded parasitic antenna of the antenna device.
  • the metal frame 1 is connected to the main ground on the circuit board 4, and the metal frame 1 is provided with at least one slot 105.
  • the position of the slot 105 is related to the second radiator 202, and the slot 105 is disposed close to the first Two radiator 202 is on the side border of the metal frame 1.
  • other slits may be disposed at other positions of the metal frame 1 as needed, and will not be described in detail herein.
  • the first radiator 201 is provided with a coupling slit 201-1 for changing the feeding mode of the RF feed 401 from direct feeding to coupling feeding.
  • the coupling slot 201-1 is disposed between the grounding point on the first radiator 201 and the feeding point, and the coupling slot 201-1 Near one end of the ground point.
  • the second radiator 202 has a rectangular shape as a whole and is disposed on the antenna carrier 5 on a side close to the feeding point of the first radiator 201.
  • the metal frame 1 is disposed on the front surface of the mobile phone where the mobile phone display screen 6 is located.
  • the metal frame 1 includes an upper metal decorative member 101 , a lower metal decorative member 102 , and a left metal frame 103 .
  • the upper metal frame strip 104; the upper metal garnish 101, the right metal frame strip 104, and the lower metal garnish 102 are sequentially connected, and the metal frame 1 is provided with a slit 105, and the slit 105 is disposed at a position and disposed on the antenna carrier 5.
  • the position of the second radiator 202 is related to that disposed between the left metal frame strip 103 and the lower metal decoration member 102 adjacent to the second radiator 202.
  • the left metal frame strip 103 and the right metal frame strip 104 are all connected to the main ground on the circuit board 4, and the number and position of the grounding can be adjusted according to specific needs.
  • a sound hole 10 of the mobile phone speaker is disposed in the middle of the upper metal decorative member 101.
  • the metal frame 1 can be attached to the plastic case of the mobile phone by structural snapping, inlaying, etc., and becomes the appearance surface of the mobile phone, and better ensures the metal texture of the appearance of the mobile phone in the shape.
  • the back of the mobile phone case is provided with an antenna carrier 5 of plastic material, and the antenna carrier 5 is disposed at the lower end of the mobile phone case, and its vertical projection and The lower metal trim 102 of the metal frame 1 is at the same end of the handset housing.
  • the first radiator 201 and the second radiator 202 are disposed on the antenna carrier 5. From the perspective of the back of the handset housing, the first radiator 201 is located on the left side of the antenna carrier 5 and the second radiator 202 is located on the right side of the antenna carrier 5.
  • the first radiator 201 is provided with a coupling slit 201-1 disposed in the vicinity of the conductive connector 303.
  • the first radiator 201 and the second radiator 202 may be mounted on the antenna carrier 5 by a process such as FPC, sheet metal material or LDS.
  • the circuit board 4 is disposed on the first radiator 201 and the lower metal trim 102. Between the first radiator 201, the circuit board 4, and the lower metal garnish 102 The three form a 'sandwich' structure, and the first radiator 201 and the second radiator 202 are on the same plane.
  • the grounding point of the first radiator 201 is located at one end of the first radiator 201 near the edge of the handset casing, and the grounding point passes through the conductive connector 303 and the metal frame 1
  • the lower metal decorative member 102 is connected; the feeding point of the first radiator 201 is located on the first radiator 201 adjacent to the second radiator 202, The feed point is connected to the RF feed 401 on the circuit board 4 via a conductive connector 301.
  • the coupling slit 201-1 on the first radiator 201 is disposed at a position between the grounding point and the feeding point and close to the grounding point.
  • the second radiator 202 is located on one side of the feeding point of the first radiator 201, and has a rectangular shape as a whole.
  • a grounding point is disposed at each end of the second radiator 202, a grounding point close to the feeding point of the first radiator 201 is connected to the ground of the circuit board 4 through the conductive connector 302, and another grounding point passes through the conductive connector 304 and the metal.
  • Border 1 The lower metal decorative members 102 are connected, and the shapes and positions of the conductive connectors 301, 302, 303, and 304 can be adjusted according to actual needs.
  • the main resonance mechanism of the mobile phone antenna device is: (1) the conductive connector 301, the first radiator 201, the conductive connector 303, and the lower metal decorative member 102 are sequentially connected, and the RF feed 401 on the main board 4 passes through the conductive connector.
  • the 301 is fed in to form a Monopole coupled feed antenna.
  • the antenna quarter-wavelength resonates in the 900MHz frequency band of the mobile phone, and the half-wavelength of the antenna resonates with the DCS of the mobile phone (digital cellular system, 1710).
  • the coupling slit 201-1 disposed on the first radiator 201 changes the RF feed 401 from direct feeding to coupling feeding, thereby changing the current distribution on the antenna loop when the user grips the metal frame 1
  • the gap is 105
  • the performance of the antenna will not be affected, and the problem of coexistence of the mobile phone antenna and the large metal parts is also well solved.
  • the conductive connector 302, the second radiator 202, the conductive connector 304 and the lower metal garnish 102 are sequentially connected to form a double-grounded parasitic antenna branch of the antenna device, mainly generating a frequency band of 850 MHz, PCS, UMTS (Universal Mobile Communication System) Resonance in some high frequency bands.
  • This mobile phone antenna adopts the Monopole antenna form and has It has the advantages of ultra-low-bandwidth bandwidth (low-bandwidth of 700MHz-1000MHz), good antenna performance and high efficiency, which guarantees excellent wireless communication performance of mobile phones.

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

Description

一种移动通信终端天线装置
技术领域
本发明涉及一种移动通信终端天线装置,具体涉及一种应用于手机的 耦合馈入式的单极天线装置 。
背景技术
随着无线通讯技术的发展,对无线通讯设备的要求也越来越高,作为电磁波接收与发送的天线也有了多种结构以适应通讯设备的要求,天线的性能或结构也因此有了更大的挑战。 无线通讯技术的蓬勃发展,使得移动终端系统上搭载的信息子模块也越来越多,如当前智能手机的系统普遍搭载多种子通信模块,这些子通信模块的增加必然会导致天线频带的扩充和天线结构复杂程度的增加。同时,智能手机等手持终端设备向着薄型化和强金属质感化的方向发展,而薄型化和强金属质感的手持终端设备无疑给天线的设计带来了巨大的挑战。
当前的移动通信终端内置天线普遍采用平面倒F天线(PIFA)和单极天线(Monopole Antenna)。平面倒F天线由于对面积和高度的要求较高,严重限制了整机的布局以及轻薄化,同时由于多天线布局所限,而且平面倒F天线受其辐射机理所限,导致其性能较差,因而没有被大量采用。而就单极天线而言,临近区域大金属件的存在对其天线性能有着致命的影响。因此,现有的移动通信终端内置天线有待改进。
发明内容
为克服现有技术的不足及存在的问题,本发明提供一种移动通信终端天线装置,该天线装置为耦合馈入式的单极天线形式,具有低频频带宽很宽、天线性能好等优点,同时也很好地解决了天线与大金属件共存的问题。
本发明是通过以下技术方案实现的: 一种 移动通信终端天线装置 ,包括设于移动通信终端壳体上的金属边框、天线载体,设于移动通信终端内的电路主板,所述电路主板上设置有该天线装置的射频馈源,天线载体上设置有该天线装置的第一辐射体与第二辐射体,其中,所述的第一辐射体设置有馈电点与接地点,所述的馈电点通过导电连接器与射频馈源连接,所述的接地点通过导电连接器与金属边框连接,用于形成一单极天线;所述的第二辐射体的两端各设置有一接地点,一接地点通过导电连接器与电路主板上的地连接,另一接地点通过导电连接器与金属边框连接,用于形成所述天线装置的双接地寄生天线分支;所述的金属边框与电路主板上的主地连接,金属边框上设置有一个或一个以上的缝隙,在靠近第二辐射体的金属边框的侧边处至少设置有一个缝隙。
进一步地,所述的第一辐射体 上设有用于使射频馈源的馈入方式由直接馈入变为耦合馈入的耦合缝隙;该耦合缝隙设置于第一辐射体上的接地点与馈电点之间,且该耦合缝隙靠近接地点的一端。
进一步地,所述的第二辐射体整体呈长方形,设置于靠近第一辐射体上馈电点的一侧的天线载体上。
较佳地,所述的金属边框设置于 移动通信终端显示屏所在的正面,该金属边框包括设于移动通信终端正面的上金属装饰件、下金属装饰件以及左金属框条、右金属框条;左金属框条、右金属框条均与电路主板上的主地连接, 所述的 上金属装饰件、右金属框条、下金属装饰件依次连接,所述的缝隙设置在靠近第二辐射体的左金属框条与下金属装饰件之间。
本发明与现有技术相比,具有低频带宽超宽、天线性能好、效率高等优点,同时也很好地解决了移动通信终端的大金属件与天线共存的问题,在造型上更好地保证了移动通信终端外观的金属质感。
附图说明
图1是 本发明实施例中金属边框在手机壳体上的结构示意图 ;
图2是 本发明实施例中天线装置设置于手机背面的结构示意图 ;
图3是 本发明实施例去掉手机壳体时的天线装置的立体结构示意图 。
图中:1-金属边框、10-出声孔、101-上金属装饰件、102-下金属装饰件、103-右金属框条、104-左金属框条、105-缝隙,201-第一辐射体、202-第二辐射体、201-1-耦合缝隙,301、302、303、304-导电连接器,4-电路主板、401-射频馈源,5-天线载体,6-显示屏。
具体实施方式
为了便于本领域技术人员的理解,以下结合附图,以应用于手机的天线装置为具体实施例对本发明作进一步描述。
如附图1、图2以及图3所示,一种手机天线装置,包括设于手机壳体上的金属边框1、天线载体5,设于手机内的电路主板4,所述电路主板4上设置有该天线装置的射频馈源401,天线载体5上设置有该天线装置的第一辐射体201与第二辐射体202,其中,所述的第一辐射体201设置有馈电点与接地点,所述的馈电点通过导电连接器与射频馈源401连接,所述的接地点通过导电连接器与金属边框1连接,用于形成一单极天线;所述的第二辐射体202的两端各设置有一接地点,一接地点通过导电连接器与电路主板4上的地连接,另一接地点通过导电连接器与金属边框1连接,用于形成所述天线装置的双接地寄生天线分支;所述的金属边框1与电路主板4上的主地连接,金属边框1上至少设置有一个缝隙105,该缝隙105设置的位置与第二辐射体202有关,缝隙105设置于靠近第二辐射体202的金属边框1的侧边边框上。当然,也可以根据需要在金属边框1的其他位置上设置其他缝隙,这里不再举例详述。
所述的第一辐射体201上设有用于使射频馈源401的馈入方式由直接馈入变为耦合馈入的耦合缝隙 201-1 ;该耦合缝隙 201-1 设置于第一辐射体201上的接地点与馈电点之间,且该耦合缝隙 201-1 靠近接地点的一端。所述的第二辐射体202整体呈长方形,设置于靠近第一辐射体201上馈电点的一侧的天线载体5上。
如附图1所示,所述的金属边框1设置于手机显示屏6所在的手机正面,该金属边框1包括手机正面的上金属装饰件101、下金属装饰件102以及左金属框条103、右金属框条104;所述上金属装饰件101、右金属框条104、下金属装饰件102依次连接,金属边框1上设置有缝隙105,该缝隙105设置的位置与设置于天线载体5上的第二辐射体202的位置有关,它设置在靠近第二辐射体202的左金属框条103与下金属装饰件102之间。左金属框条103、右金属框条104均与电路主板4上的主地连接,接地的数量与位置可根据具体的需要来调整。此外,上金属装饰件101中间设置有一手机扬声器的出声孔10。金属边框1可以通过结构卡扣、镶嵌等方式安装于手机的塑胶壳体上,成为手机的外观面,在造型上更好地保证手机外观的金属质感。
如附图2所示,手机壳体背面设置有塑胶材料的天线载体5,天线载体5设置于手机壳体的下端,其垂直投影与 金属边框1的下金属装饰件102处于手机壳体的同一端。 第一辐射体201、第二辐射体202设置于天线载体5上。从手机壳体背面的角度来看,第一辐射体201位于天线载体5的左侧,第二辐射体202位于天线载体5的右侧。其中,第一辐射体201上设置有耦合缝隙201-1,该耦合缝隙201-1设置于导电连接器303的附近。第一辐射体201、第二辐射体202可通过FPC、金属片材料或者LDS等工艺安装于天线载体5上。
如附图3所示,电路主板4设于第一辐射体201与 下金属装饰件 102 之间,第一辐射体201、电路主板4以及 下金属装饰件 102 三者形成'三明治'结构,第一辐射体201、第二辐射体202处于同一平面上。第一辐射体201的接地点位于靠近手机壳体边缘的第一辐射体201的一端上,该接地点通过导电连接器303与金属边框1的 下金属装饰件102连接; 第一辐射体201的馈电点位于靠近第二辐射体202的第一辐射体201上, 该 馈电点通过导电连接器301与电路主板4上的射频馈源401连接。第一辐射体201上的耦合缝隙201-1设置于接地点与馈电点之间且靠近接地点的位置上。第二辐射体202位于第一辐射体201的馈电点的一侧,其整体呈长方形。第二辐射体202两端各设置有一接地点,靠近第一辐射体201的馈电点的接地点通过导电连接器302与电路主板4的地连接,另一接地点通过导电连接器304与金属边框1的 下金属装饰件102连接, 其中,导电连接器301、302、303、304的形状和位置均可以根据实际需要进行调整。
本手机天线装置的主要谐振机理为:(1)由导电连接器301、第一辐射体201、导电连接器303、下金属装饰件102依次连接,主板4上的射频馈源401通过导电连接器301馈入,形成一Monopole(单极)的耦合馈入天线。由此天线的谐振原理可知:该天线四分之一波长谐振于手机的900MHz频段,同时该天线的二分之一波长谐振于手机的DCS(数字蜂窝系统,1710 MHz-1880MHz )频段,PCS(个人通信服务)部分频段; 第一辐射体201上设置的耦合缝隙201-1,使射频馈源401从直接馈入的方式变为耦合馈入,从而改变了天线回路上的电流分布,当用户手握紧金属边框1上的缝隙105时,天线的性能不会因此而收到影响,同时也很好地解决了手机天线与大金属件共存的问题。 (2) 由导电连接器302、第二辐射体202、导电连接器304以及下金属装饰件102依次连接,形成该天线装置的双接地寄生天线分支,主要产生850MHz频段,PCS、UMTS(通用移动通信系统)部分高频频段的谐振。本手机天线采用Monopole天线形式,具有 具有低频带宽超 宽 ( 其低频带宽可达700MHz-1000MHz) 、天线性能好、效率高等优点,保证了手机优异的无线通信性能。
上述实施例为本发明较佳的实现方式,并非是对本发明的限定,在不脱离本发明构思的前提下,任何显而易见的替换均在本发明的保护范围之内。

Claims (7)

  1. 一种 移动通信终端天线装置 ,包括设于移动通信终端壳体上的金属边框(1)、天线载体(5),设于移动通信终端内的电路主板(4),所述电路主板上设置有该天线装置的射频馈源(401),天线载体上设置有该天线装置的第一辐射体(201)与第二辐射体(202),其特征在于:
    所述的第一辐射体(201)设置有馈电点与接地点,馈电点通过导电连接器(301)与射频馈源(401)连接,接地点通过导电连接器(303)与金属边框连接,用于形成一单极天线;
    所述的第二辐射体(202)的两端各设置有一接地点,一接地点通过导电连接器(302)与电路主板(4)上的地连接,另一接地点通过导电连接器(304)与金属边框连接,用于形成所述天线装置的双接地寄生天线分支;
    所述的金属边框(1)与电路主板上的主地连接,金属边框上设置有一个或一个以上的缝隙,在靠近第二辐射体的金属边框的侧边处至少设置有一个缝隙(105)。
  2. 根据权利要求 1 所述的 移动通信终端天线装置 ,其特征在于:所述的第一辐射体 (201)上设有用于使射频馈源(401)的馈入方式由直接馈入变为耦合馈入的耦合缝隙( 201-1 ) 。
  3. 根据权利要求2所述的 移动通信终端天线装置 ,其特征在于:所述的 耦合缝隙( 201-1 ) 设置于第一辐射体( 201 ) 上的接地点与馈电点之间,且该耦合缝隙靠近接地点的一端。
  4. 根据权利要求3所述的 移动通信终端天线装置 ,其特征在于:所述的第二辐射体 ( 202 ) 整体呈长方形,设置于靠近第一辐射体上馈电点的一侧的天线载体 ( 5 ) 上。
  5. 根据权利要求1-4 任一项所述的 移动通信终端天线装置 ,其特征在于:所述的金属边框 (1) 设置于 移动通信终端显示屏(6)所在的正面,该金属边框包括设于移动通信终端正面的上金属装饰件(101)、下金属装饰件(102)以及左金属框条(103)、右金属框条(104)。
  6. 根据权利要求5 所述的 移动通信终端天线装置 ,其特征在于:所述的 上金属装饰件(101)、右金属框条(104)、下金属装饰件(102)依次连接,所述的缝隙(105)设置在靠近第二辐射体(202)的左金属框条(103)与下金属装饰件之间(102)。
  7. 根据权利要求6 所述的 移动通信终端天线装置 ,其特征在于: 所述的左金属框条(103)、右金属框条(104)均与电路主板(4)上的主地连接。
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