CN100448101C - 移动通信终端的宽频带天线 - Google Patents

移动通信终端的宽频带天线 Download PDF

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CN100448101C
CN100448101C CNB2005100662262A CN200510066226A CN100448101C CN 100448101 C CN100448101 C CN 100448101C CN B2005100662262 A CNB2005100662262 A CN B2005100662262A CN 200510066226 A CN200510066226 A CN 200510066226A CN 100448101 C CN100448101 C CN 100448101C
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antenna
circuit board
printed circuit
mobile communication
pcb
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CN1761100A (zh
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南秀铉
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Inspur LG Digital Mobile Communications Co Ltd
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LG Electronics China Research and Development Center Co Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/12Supports; Mounting means
    • H01Q1/22Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242Supports; 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/36Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/10Resonant antennas

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

Abstract

本发明涉及移动通信终端的宽频带天线,其特征在于,从正面看,在印刷电路板的正面和背面分别形成长度为低频的1/4波长、具有矩形波形态的天线模式一和长度为高频的1/4波长、具有棒状形态的天线模式二;从侧面看,在天线模式一与天线模式二两者末端通过通孔相互连接。采用本发明是在印刷电路板两面形成天线,在1次2次共振基础上添加并联共振引起的3次共振,把动作频带形成为宽频带,从而具有如下效果,即,在不降低Q值、效率的情况下形成宽频带,与加利的天线相比,更容易形成和修正天线。

Description

移动通信终端的宽频带天线
技术领域
本发明涉及移动通信终端的宽频带天线,特别是涉及一种在印刷电路板的两面形成天线,在1次2次共振基础上添加并联共振引起的3次共振,可以使动作频带形成宽带的移动通信终端的宽频带天线。
背景技术
现有4波段终端要求支持GSM900、DCS1800/1900、WCDMA的4波段天线,现有3波段终端是以螺旋方式调整支持GSM900、DCS1800/1900的基于1次2次共振的天线的螺距来加以实现。
2GHz频带的WCDMA终端需要把1800~2170MHz频带形成宽频带,当使用基于1次2次共振的天线时,存在低频或高频中的某一个频带的反射系数恶化,输出特性趋于恶化的倾向。
为此,终端使用的方法有两种:一种是追加LC,降低Q值,拓宽频带;另一种方法是以短截线(Stub)形态追加补充共振天线。当追加LC时,反而出现输出效率下降的倾向,当追加短截线时,制作起来比较困难,而且难以把偏振保持在一定方向。
如图1所示,加利公司是在线轴中心形成WCDMA的极子,形成螺旋11,实现天线,通过调整螺旋的螺距,形成需要的频带,但存在需要制作模具、不容易调谐的问题。
发明内容
本发明所要解决的技术问题在于提供一种移动通信终端的宽频带天线,在印刷电路板的两面形成天线,在1次2次共振基础上添加并联共振引起的3次共振,能够使动作频带形成宽频带。
为实现上述目的,本发明的特征在于:从正面看,在印刷电路板的正面和背面分别形成长度为低频的1/4波长、具有矩形波形态的天线模式一和长度为高频的1/4波长、具有棒状形态的天线模式二;从侧面看,在天线模式一与天线模式二两者末端通过通孔相互连接。
采用本发明可以在不降低Q值、效率的情况下形成宽频带,与加利的天线相比,更容易形成和修正天线。并且可以不在主印刷电路板上追加安装另外的天线,印刷电路板使用6~8层的多层基板,当需要蓝牙等其它频带时,可在各层追加需要的共振天线,实现宽频带天线。
附图说明
图1是现有移动通信终端的利用1次2次共振的天线构成示例图。
图2是图1所示的天线的各频率反射系数示例图。
图3是本发明实施例的宽频带天线位于印刷电路板既定位置的示例图。
图4A是本发明实施例的宽频带天线的正面示例图。
图4B是本发明实施例的宽频带天线的侧面示例图。
图5是图4A所示的天线的各频率的反射系数示例图。
其中,附图标记:
11:螺旋
31:天线PCB       32:主PCB
41:天线模式一    42:天线模式二
43:通孔          51:并联共振
具体实施方式
下面参照附图,详细说明本发明的实施例。
图3是本发明实施例的宽频带天线位于印刷电路板既定位置的示例图。
宽频带天线形成于天线PCB31(Printed Circuit Board,印刷电路板)上,天线PCB31连接到主PCB32。宽频带天线位于印刷电路板(PCB)的上端右侧,在印刷电路板的两面分别形成有在低频带共振的天线模式一和在高频带共振的天线模式二。天线模式一长度为低频的1/4波长,具有矩形波形态,天线模式二长度为高频的1/4波长,具有棒状形态。
图4A是本发明实施例的宽频带天线的正面示例图,并且图4B是本发明实施例的宽频带天线的侧面示例图。
宽频带天线从正面看,在印刷电路板的正面和背面形成天线模式一41和天线模式二42;从侧面看,在天线模式一与天线模式二两者末端通过通孔(Via Hole)相互连接。
天线模式二42属高频带,所以调整宽频带天线的尺寸,也可以向天线模式一41一样,具有矩形波形态。
形成宽频带天线的印刷电路板以金属套筒安装于主印刷电路板上,或以SMT(Surface mount technology表面粘着技术)软焊于主印刷电路板上。另外,宽频带天线形成于延伸的印刷电路板上。
图5是图4A所示的天线的各频率反射系数示例图。
宽频带天线在各频率的反射系数中,表现出低频带的1次共振、高频带的2次共振、并联共振51,作为反射系数是1的点共有3个。各共振点对应地位于终端要求的频带。
如上所述,本发明是在印刷电路板两面上形成天线,在1次2次共振基础上添加并联共振引起的3次共振,把动作频带形成为宽频带,从而具有如下效果,即,在不降低Q值、效率的情况下形成宽频带,与加利的天线相比,更容易形成和修正天线。
另外,通过在主印刷电路板上一体化形成宽频带天线,还具有如下效果,即,不在主印刷电路板上追加安装另外的天线,印刷电路板使用6~8层的多层基板,当需要蓝牙等其它频带时,可在各层追加需要的共振天线,实现宽频带天线。
当然,本发明还可有其它多种实施例,在不背离本发明精神及其实质的情况下,熟悉本领域的技术人员当可根据本发明作出各种相应的改变和变形,但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。

Claims (5)

1、一种移动通信终端的宽频带天线,其特征在于,从正面看,在印刷电路板的正面和背面分别形成长度为低频的1/4波长、具有矩形波形态的天线模式一和长度为高频的1/4波长、具有棒状形态的天线模式二;从侧面看,在所述天线模式一与天线模式二两者末端通过通孔相互连接。
2、根据权利要求1所述的移动通信终端的宽频带天线,其特征在于,形成所述宽频带天线的印刷电路板以金属套筒安装于主印刷电路板上。
3、根据权利要求1所述的移动通信终端的宽频带天线,其特征在于,形成所述宽频带天线的印刷电路板以表面粘着技术软焊于主印刷电路板上。
4、根据权利要求1所述的移动通信终端的宽频带天线,其特征在于,形成所述宽频带天线的印刷电路板形成于主印刷电路板延伸的印刷电路板上。
5、根据权利要求1所述的移动通信终端的宽频带天线,其特征在于,所述天线模式二通过调整宽频带天线的尺寸,形成矩形波形态。
CNB2005100662262A 2004-10-15 2005-04-25 移动通信终端的宽频带天线 Expired - Fee Related CN100448101C (zh)

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KR1020040082739 2004-10-15

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KR100962574B1 (ko) * 2008-01-22 2010-06-22 주식회사 모비텍 비아홀에 의한 주파수 가변 칩 안테나
CN101572351B (zh) * 2008-04-28 2013-07-31 鸿富锦精密工业(深圳)有限公司 多输入多输出天线
CN101984520B (zh) * 2010-10-22 2013-12-11 惠州Tcl移动通信有限公司 一种蓝牙天线结构及其便携式无线通讯装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09139621A (ja) * 1995-11-16 1997-05-27 Kyocera Corp 内蔵平面アンテナ
CN2530353Y (zh) * 2001-08-27 2003-01-08 耀登科技股份有限公司 电容加载型单极平面天线
JP2003142937A (ja) * 2001-11-05 2003-05-16 Yasushi Horii コプレーナ線路により構成されたループに微小ループを磁気結合させた構造をもつ小型平面アンテナ
CN1489239A (zh) * 2002-10-09 2004-04-14 广达电脑股份有限公司 多频移动电话平面天线

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Publication number Priority date Publication date Assignee Title
FI112983B (fi) 1997-12-10 2004-02-13 Nokia Corp Antenni
US6040803A (en) * 1998-02-19 2000-03-21 Ericsson Inc. Dual band diversity antenna having parasitic radiating element

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09139621A (ja) * 1995-11-16 1997-05-27 Kyocera Corp 内蔵平面アンテナ
CN2530353Y (zh) * 2001-08-27 2003-01-08 耀登科技股份有限公司 电容加载型单极平面天线
JP2003142937A (ja) * 2001-11-05 2003-05-16 Yasushi Horii コプレーナ線路により構成されたループに微小ループを磁気結合させた構造をもつ小型平面アンテナ
CN1489239A (zh) * 2002-10-09 2004-04-14 广达电脑股份有限公司 多频移动电话平面天线

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CN1761100A (zh) 2006-04-19
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