手机天线设计指导

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1、HowtodesignaGOODinternalantenna?如何设计一个好的内置天线CONFIDENTIALPIFAshortcircuited<=>/4resonator<=>compactstructure（短接电路<=>/4谐振片<=>紧凑的结构）omnidirectionalinhorizontalplane（水平面的全方向性）co-andcrosspolarisations（同向和交叉极化）Multiresonant（多谐的）CONFIDENTIALNumberONErule(首要规则)Whendesigninganyki

2、ndofsmallantennaforthemobilephone,it’simportanttostartdesigningtheantennaTOGETHERwiththeantennamanufacturerinveryearlystatetoachievethebestpossibleperformance,andwhenconcerninginternalantennasthisisevenMOREimportant（在设计任何种类的移动电话天线时，为了得到尽可能最好的性能，和天线制造商在最初阶段一起开始设计天线是很重要的，这对于

3、内置天线来说尤为重要。）CONFIDENTIALRuleNo.2（规则2）Useallspaceyouhave:BIGsizeisbeautifulwhenconcerningantenna’sperformance（使用尽可能多的空间：对于天线的性能来讲，尺寸越大越好。）CONFIDENTIALRuleNo.3（规则3）Payspecialattentiontoantenna’sheight(distancebetweenradiatorandground)<=>BANDWIDTH!（请密切注意天线的高度（发射片和接地片的距离）<=>带宽

4、）CONFIDENTIALRuleNo.4（规则4）Alsothelengthofthechassishasaremarkableeffectontheperformanceoftheantenna手机的长度对于天线的性能有着显著的影响Verticallypolarisedgain[dBi]-9-8-7-6-5-4-3-2-1095908580757065605550454035302520gainchassis'length[mm]CONFIDENTIALRuleNo.5（规则5）KeepALLmetalsasfaraspossiblef

5、romtheantenna,atleastasfarasgroundplaneis（所有的金属应尽可能的远离天线，至少象接地片一样远。）CONFIDENTIALRuleNo.6（规则6）Locatefeedingandshortcircuitingpadsneartheedgeofthegroundplane(phone’sPCB).ForspringcontactsthedistancebetweenbendingpointandPCB-padshouldbe4…5mm.（把馈点和短接电路点接近于接地片的边缘（手机的PCB板），对于弹簧片

6、接触来说，弯折点和PCB焊点的距离应为4…5毫米）CONFIDENTIALRuleNo.7（规则7）Don’t“shield”padsortrytominimizeshielding（不要屏蔽焊点或是试图减少遮护板）CONFIDENTIALRuleNo.8（规则8）Lettheradiator’sedges“see”freeedgeofgroundplaneasmuchaspossible,maybeevenreachoverthegroundplane’sedge（发射片的边缘尽可能接近接地片的边缘，甚至发射片可以超出接地片的边缘）CON

7、FIDENTIALRuleNo.9（规则9）Allmetalsofthechassishavetobeproperlygroundedtoavoidpowerlossesandadditionalnon-radiatingresonances.PayspecialattentiontoRF-gaskets.（手机的所有金属必须正确的接地，避免能量损失，和附加的不辐射的谐振。关注射频垫圈。）CONFIDENTIALRuleNo.10(规则10)Letthespacebetweenradiatorandgroundplanebefilledwi

8、thairasmuchaspossible,inotherwordsuseaslittlesupportmaterialaspossible（使发射片和接地片之间的空间尽可能多地