CN1441978A - 天线装置 - Google Patents
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H01Q21/00—Antenna arrays or systems
- H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
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- H—ELECTRICITY
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- 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
- H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
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- H—ELECTRICITY
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- 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
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
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- 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
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
- H01Q9/265—Open ring dipoles; Circular dipoles
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- H—ELECTRICITY
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- 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
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
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- 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
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
- H01Q9/285—Planar dipole
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Abstract
用于无线通信设备优选地为便携式无线通信设备的天线装置,包括第一天线单元(20),它包括被连接到第一馈电装置(24)的第一馈电部分(22);第二天线单元(30;230;330;430;530;630),其包括被连接到第二馈电装置(34)的第二馈电部分(32,33;332,333),其中所述第一天线单元(20)具有非平衡馈电而所述第二天线单元(30;230;330;430;530;630)具有基本上平衡的馈电。
Description
发明领域
本发明总的涉及天线装置,更具体地,涉及在无线通信设备(诸如移动电话)中使用的天线装置。
背景
在便携式无线通信设备中,用于内部天线安排的空间是有限的。随着对于更大的功能和更好的无线信道质量的需要不断增长,在便携式无线通信设备(诸如移动电话)中常常必须利用一个以上的天线单元。因为在便携式无线通信设备中有限的空间,内部天线趋于间隔紧密地设置。对于间隔紧密的天线单元,在天线之间会出现不想要的耦合。
间隔紧密的天线之间的低的耦合对于各种应用是必须的。这些例如可以是:消除对双工器的需要的分开的RX和TX天线,天线分集***(接收机分集和发射机分集),用于不同***的天线(例如,GSM-兰牙)。
在WO 9013152中描述了分开的RX/TX天线。WO 9013152只提到同一种类型的两个天线(两个相同的贴片天线)的情形。在WO 9013152中提供了消除对双工器的需要的解决方案。而且,披露了分开的发送和接收天线通过导电的支架被树立在接地面上面,其中支架被放置在天线之间并与天线电隔离。
上述的文件只描述了分开的发送和接收天线之间的减小的耦合。
发明概要
本发明的目的是提供在无线通信设备(优选地为便携式无线通信设备)中使用的天线装置,其中发送和接收天线单元之间的电耦合被最小化。
本发明是基于这样的认识,即当一个天线单元具有平衡的馈电而另一个天线单元具有非平衡的馈电时,能够设计两个天线,使得天线之间的耦合低于两个天线都具有非平衡的或平衡的馈电时的情形。
采用一个平衡的和非平衡的天线对的优点在于,通过接收机电子电路的平衡的输入和来自输出放大器的非平衡馈电,可以实现较低的损耗和对接收机/发射机的改进的匹配。
按照本发明,提供了如所附权利要求1所确定的天线装置。
还提供了包括这样的天线装置的无线通信设备。
另外的优选实施例在从属权利要求中限定。
附图简述
现在参照附图通过例子描述本发明,其中:
图1是按照本发明的天线装置的第一实施例的示意性透视图;
图2是按照本发明的天线装置的第二实施例的示意性顶视图;
图3是按照本发明的天线装置的第三实施例的示意性顶视图;
图4是按照本发明的天线装置的第四实施例的示意性顶视图;
图5是按照本发明的天线装置的第五实施例的示意性透视图;
图6是按照本发明的天线装置的第六实施例的示意性顶视图;
图7示出按照本发明的天线装置的接收RF链路的优选布局的方框图;以及
图8示出按照本发明的天线装置的发射RF链路的优选布局的方框图。
发明详细描述
下面,给出按照本发明的天线装置的优选实施例的详细说明。在这里描述的几个实施例中,不同的实施例的相同的部分以相同的标号表示。
平衡馈电被定义为在存在地的条件下包括两个导体的传输线能够以这样方式工作,使得当在所有的横截面上两个导体相对于地的电压在幅度上是相等的和在极性上是相反的,且两个导体中的电流在幅度上基本上相等和在方向上是相反的。非平衡馈电被定义为不满足以上的准则的馈电。
首先参照图1,其中天线装置或模块(总的表示为1)包括印刷电路板(PCB)10,其具有安装在其上的电路,用于移动电话(图上未示出)的电子电路的发射机部分24和接收机部分34。PCB10也用作用于平面倒F天线(PIFA)的地平面,它的辐射单元表示为20。辐射单元20被放置成与PCB10间隔开,基本上与其平行,并包括被连接到发射机部分24的馈电单元的馈电部分22,和被连接到发射机部分的接地单元的按地部分23。因此,PIFA20用作装置1的发射天线。
PIFA20是非平衡馈电天线,其中接地部分23被直接连接到地。连接也可以选择为通过包括集中或分布电感和/或电容的匹配网络。
天线装置1也包括环状天线,其被表示为330。环状天线由导线在平行于PCB10并还平行于辐射单元20的平面上(其基本上在PIFA单元的平面上)形成一个包围PIFA单元的环而形成。
在PIFA天线20与平衡馈电的环状天线330之间的耦合是低的,因为PIFA20给出基本上垂直于天线平面的电场,而平衡馈电的环状天线330给出基本上垂直于天线平面的磁场。所以,这两个天线互相之间具有低的耦合。环状天线330通过它的末端332,333连接到接收部分34的各输入端。在图上,一个输入端标以正的,另一个输入端标以负的。环状天线330是平衡的,即,它由相反的信号馈电,由此,它用作为磁天线。
替换地,环状天线330可以被一个开路的环(即偶极天线)来代替。
现在参照图7描述接收机部分34的接收RF链路的优选的布局。RF链路包括平衡的滤波器334,它的输入端在图中被标以“+”和“-”,通过它的末端332,333被连接到接收天线330。平衡滤波器334的输出端被连接到低噪声放大器(LNA)335,低噪声具有平衡输入端,被标以“+”和“-”。LNA335又被连接到接收机部分34的RF电子电路(未示出)。这个连接可以是平衡的或非平衡的。
设置平衡滤波器334具有以下的优点。首先,在用于把接收的信号从非平衡变换到平衡的传统布置中存在的balun(平衡-非平衡转换器)可被省略,由此,减小信号损耗、制造成本和由RF电子电路所需要的空间。第二,发射机与接收机之间的隔离增加,因为发射机链路是非平衡的而接收机链是平衡的。这导致两个电路之间较小的交扰。
具有平衡的LNA的另一个优点在于,它可以通过专用集成电路(ASIC)技术制做,这是优选的。ASIC应用总是平衡的。
现在参照图8描述发射机部分24的发射RF链路的优选布局。TX链路包括平衡的功率放大器(PA)25,其具有被连接到发射机电子电路(未示出)的输入端。这个输入端可以是平衡的或非平衡的。放大器的平衡输出端被连接到平衡滤波器26的输入端,它的输出馈送到发射机天线。
以这样的方式提供发射机链路的优点在于发射与接收电路之间减小的耦合,导致较小的交扰等等。
在图2所示的可选的第二实施例中,环状天线被偶极天线230代替,它包括两个像绞线那样的部分231a,231b。这两个部分在它的任一侧围绕PIFA单元20以及与基本上平面的单元20在同一个面层。正如第一实施例那样,偶极天线230具有平衡的馈电部分。
两个像绞线那样的部分231a,231b被显示为具有相等的长度的两个部分,但优选地,一个单元(例如,231b)的长度用来调节偶极天线230的阻抗和/或谐振频率。
在图3所示的可选的第三实施例中,接收天线是环状天线30,其具有端部32,33,端部被连接到接收机部分的各个输入端。然而,与上面参照图1描述的实施例相反,这个环状天线被设置在垂直于PCB10和PIFA单元20的平面上。
图1-3所示的三个实施例都是按照本发明的天线装置的基本结构。它们具有共同点:提供了用作发射天线的非平衡PIFA天线和平衡馈电的接收天线,接收天线或者是环状天线或者是偶极天线。在图1和2中,平衡馈电的天线330,230还环绕PIFA天线20。
在图4-6中示出基本结构的变型。图4所示的实施例类似于图1的实施例,差别在于,连到环状天线430的连接432,433制作在与PIFA的馈电部分和接地部分22,23相对的、PIFA单元20的一侧。这提供优点:与PCB的耦合受到影响,以及可被调整到想要的设计。
图5所示的实施例类似于图3的实施例,差别在于,环状天线530被提供在与PIFA的馈电部分和接地部分22,23相对的、PIFA单元20的一侧。这提供的优点是与PCB的耦合受到影响,并可调整到所需的设计。
图6所示的实施例类似于图2的实施例,差别在于,偶极天线630的连接部分被设在与PIFA的馈电部分和接地部分22,23相对的、PIFA单元20的一侧。这提供的优点是与PCB的耦合受到影响,并可调整到所需的设计。
为了使得非平衡与平衡天线之间的耦合最小化,非平衡天线优选地被小型化。通过用高的介质材料装载非平衡天线,诸如用陶瓷或陶瓷与塑料的混合物,平衡与非平衡天线之间的最小距离被增加,由此进一步减小它们之间的耦合。
已描述了按照本发明的天线装置的优选实施例。然而,本领域技术人员将会看到,这些实施例可以在附属权利要求的范围内变化,而不背离本发明思想。因此,虽然示出了发射和接收天线,但本发明思想并不限于此。例如,可以提供两个接收天线,其中一个是平衡的而另一个是非平衡的。这样,它们之间的耦合被最小化。另外,可得到天线分集。不同的天线可以用于在不同的通信***(例如,兰牙,GSM,和UMTS)工作。它们也可工作在不同的频段,例如GSM900和GSM1800。还提供了进一步的组合,这样,可能的组合是:两个发射/接收天线;一个发射/接收天线和一个接收天线;一个发射/接收天线和一个发射天线;两个接收天线;两个发射天线;一个发射天线和一个接收天线;其中在每个组合中,每个天线可以是非平衡的或平衡的。
已经示出了特定的天线方向图。然而,本领域技术人员将会知道,非平衡天线不一定是PIFA,而可以是贴片天线,改进的的PIFA,曲折的PIFA,或缝隙天线等。
在图中,示出了馈电装置24,34,它们应当被看作为:用于发射天线的馈电装置,用于接收天线的接收机装置,用于发射/接收天线的馈电/接收机装置。
应认识到,参照图7描述的接收机RF链路和参照图8描述的发射机RF链路可应用于以上描述的所有实施例的接收机部分和发射机部分。
Claims (23)
1.用于无线通信设备的天线装置,所述天线装置包括:
第一天线单元(20),其包括被连接到第一馈电装置(24)的第一馈电部分(22),
第二天线单元(30;230;330;430;530;630),其包括被连接到第二馈电装置(34)的第二馈电部分(32,33;332,333),
其特征在于,
所述第一天线单元(20)具有非平衡馈电,以及
所述第二天线单元(30;230;330;430;530;630)具有基本上平衡的馈电。
2.按照权利要求1所述的天线装置,其中所述无线通信设备是便携式的。
3.按照权利要求1和2所述的天线装置,其中所述第一天线单元(20)用来发射无线电信号而所述第二天线单元(30;230;330;430;530;630)用来接收无线电信号。
4.按照权利要求1或2所述的天线装置,其中所述第一(20)和所述第二(30;230;330;430;530;630)天线单元用来发射无线电信号。
5.按照权利要求1或2所述的天线装置,其中所述第一(20)和所述第二(30;230;330;430;530;630)天线单元用来接收和发射无线电信号。
6.按照权利要求1或2所述的天线装置,其中所述第一(20)和所述第二(30;230;330;430;530;630)天线单元用来接收无线电信号。
7.按照权利要求1或2所述的天线装置,其中所述第一天线单元(20)用来接收无线电信号而所述第二天线单元(30;230;330;430;530;630)用来发射。
8.按照权利要求1或2所述的天线装置,其中所述第一天线单元(20)用来接收无线电信号而所述第二天线单元(30;230;330;430;530;630)用来接收和发射无线电信号。
9.按照权利要求1或2所述的天线装置,其中所述第一天线单元(20)用来接收和发射无线电信号而所述第二天线单元(30;230;330;430;530;630)用来发射无线电信号。
10.按照权利要求1或2所述的天线装置,其中所述第一天线单元(20)用来发射无线电信号而所述第二天线单元(30;230;330;430;530;630)用来接收和发射无线电信号。
11.按照权利要求1或2所述的天线装置,其中所述第一天线单元(20)用来接收和发射无线电信号而所述第二天线单元(30;230;330;430;530;630)用来接收无线电信号。
12.按照权利要求1-11中任一项所述的天线装置,其中所述第一天线单元(20)是从包含平面倒F天线,贴片天线,改进的平面倒F天线,曲折的平面倒F天线和缝隙天线的组中选择的。
13.按照权利要求1-12中任一项所述的天线装置,其中所述第二天线单元是环状天线(30;330;430;530)。
14.按照权利要求1-12中任一项所述的天线装置,其中所述第二天线单元是偶极天线(230;630)。
15.按照权利要求14所述的天线装置,其中所述偶极天线(230;630)具有不同长度的部分(231a,231b)。
16.按照权利要求1-15中任一项所述的天线装置,其中所述第二天线(230;330;430;630)被放置在基本上平行于所述第一天线单元(20)的平面内。
17.按照权利要求1-15中任一项所述的天线装置,其中所述第二天线(30;530)被放置在基本上垂直于所述第一天线单元(20)的平面内。
18.按照权利要求1-16中任一项所述的天线装置,其中所述第二天线单元(230;330;430;630)基本上围绕所述第一天线单元(20)。
19.按照权利要求1-18中任一项所述的天线装置,其中所述第二馈电装置(34)包括平衡滤波器(334),它的输入端被设置成可接收来自所述第二馈电部分(32,33;332,333;432,433)的信号;以及平衡放大器(335),它的输入端被设置成可接收来自所述平衡滤波器(334)的输出端的信号。
20.按照权利要求19所述的天线装置,其中所述平衡放大器(335)优选地是由专用集成电路技术提供的低噪声放大器。
21.按照权利要求1-20中任一项所述的天线装置,其中所述第一馈电装置(24)包括平衡放大器(25),它的输入端被设置成可接收要被发送的信号,且它的输出端是平衡的;以及平衡滤波器(26),它的输入端被设置成可接收来自所述放大器的信号,且它的输出端被设置成可发送信号到所述第一天线单元(20)。
22.一种包括按照任一前述权利要求的天线装置的无线通信设备。
23.按照权利要求22所述的无线通信设备,其中所述无线通信设备是便携式的。
Applications Claiming Priority (4)
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SE0002599A SE518706C2 (sv) | 2000-07-10 | 2000-07-10 | Antennanordning |
SE00025999 | 2000-07-10 | ||
SE00047241 | 2000-12-20 | ||
SE0004724A SE0004724D0 (sv) | 2000-07-10 | 2000-12-20 | Antenna device |
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CN1441978A true CN1441978A (zh) | 2003-09-10 |
CN1223044C CN1223044C (zh) | 2005-10-12 |
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CNB018125700A Expired - Fee Related CN1223044C (zh) | 2000-07-10 | 2001-07-10 | 天线装置 |
CNB018125697A Expired - Fee Related CN1227773C (zh) | 2000-07-10 | 2001-07-10 | 天线装置和便携式无线通信设备 |
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CNB018125697A Expired - Fee Related CN1227773C (zh) | 2000-07-10 | 2001-07-10 | 天线装置和便携式无线通信设备 |
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US (2) | US6909401B2 (zh) |
EP (2) | EP1305843B1 (zh) |
KR (2) | KR100757506B1 (zh) |
CN (2) | CN1223044C (zh) |
AU (2) | AU2001269665A1 (zh) |
DE (1) | DE60125947T2 (zh) |
SE (1) | SE0004724D0 (zh) |
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- 2001-07-10 AU AU2001269665A patent/AU2001269665A1/en not_active Abandoned
- 2001-07-10 EP EP01948186A patent/EP1305843B1/en not_active Expired - Lifetime
- 2001-07-10 CN CNB018125700A patent/CN1223044C/zh not_active Expired - Fee Related
- 2001-07-10 KR KR1020027003151A patent/KR100757506B1/ko active IP Right Grant
- 2001-07-10 WO PCT/SE2001/001601 patent/WO2002005381A1/en active IP Right Grant
- 2001-07-10 US US10/312,564 patent/US6894649B2/en not_active Expired - Fee Related
- 2001-07-10 CN CNB018125697A patent/CN1227773C/zh not_active Expired - Fee Related
- 2001-07-10 DE DE60125947T patent/DE60125947T2/de not_active Expired - Fee Related
- 2001-07-10 WO PCT/SE2001/001600 patent/WO2002005380A1/en active Application Filing
- 2001-07-10 KR KR1020027003150A patent/KR20020027636A/ko not_active Application Discontinuation
- 2001-07-10 AU AU2001269664A patent/AU2001269664A1/en not_active Abandoned
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CN103515706A (zh) * | 2012-06-14 | 2014-01-15 | Tdk株式会社 | 天线装置 |
CN103515706B (zh) * | 2012-06-14 | 2016-06-15 | Tdk株式会社 | 天线装置 |
US9385425B2 (en) | 2012-06-14 | 2016-07-05 | Tdk Corporation | Antenna device |
Also Published As
Publication number | Publication date |
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EP1307942B1 (en) | 2013-04-24 |
CN1441977A (zh) | 2003-09-10 |
US20040090384A1 (en) | 2004-05-13 |
KR20020027636A (ko) | 2002-04-13 |
US6894649B2 (en) | 2005-05-17 |
DE60125947D1 (de) | 2007-02-22 |
DE60125947T2 (de) | 2007-10-31 |
US20030189519A1 (en) | 2003-10-09 |
CN1223044C (zh) | 2005-10-12 |
KR20020026382A (ko) | 2002-04-09 |
EP1305843A1 (en) | 2003-05-02 |
WO2002005381A1 (en) | 2002-01-17 |
CN1227773C (zh) | 2005-11-16 |
KR100757506B1 (ko) | 2007-09-11 |
AU2001269664A1 (en) | 2002-01-21 |
AU2001269665A1 (en) | 2002-01-21 |
US6909401B2 (en) | 2005-06-21 |
EP1305843B1 (en) | 2007-01-10 |
SE0004724D0 (sv) | 2000-12-20 |
WO2002005380A1 (en) | 2002-01-17 |
EP1307942A1 (en) | 2003-05-07 |
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