手机天线选型指导书.doc

目 录Table of Contents 1天线基本知识 ...................................................................................................................7 1.1移动通信奴才天线的要求............................................................................................7 1.2天线的分类和性能对比...............................................................................................7 1.2.1分类 .............................................................................................................................7 1.2.2外置天线的情况 ...........................................................................................................7 1.2.3内置天线的情况 .........................................................................................................10 1.2.4内置天线与外置天线电特性与成本比较 .....................................................................11 1.2.5综合 ...........................................................................................................................11 1.3天线的指标意义........................................................................................................12 1.4天线应用中需注意的问题..........................................................................................14 1.4.1天线与射频前端的配合问题................................................................................14 1.4.2导电体对天线特性的影响...........................................................................................14 1.4.3人体对天线特性的影响 .......................................................................................18 1.4.4天线对SAR（scatter absorb rate）的影响.........................................................18 1.5天线的测试项目和测试设备介绍......................................................................................19 1.5.1天线的测试项目 .........................................................................................................19 1.5.2天线的测试设备..................................................................................................19 1.6天线与电路的连接方式......................................................................................22 1.7各种天线的特点与设计要点......................................................................................22 1.7.1螺旋天线....................................................................................................................22 1.7.2PCB板螺旋天线.........................................................................................................22 1.7.3PIFA天线 ...................................................................................................................22 1.7.4微带贴片天线.............................................................................................................23 1.8天线多频实现............................................................................................................26 1.8.1外置天线多频的实现方式...........................................................................................26 1.8.2微带天线多频的实现方式...........................................................................................29 1.9HDA（高介质）天线........................................................................................................35 1.10各厂家所用天线情况.................................................................................................35 2天线的选型与设计的配合问题.................................................................................39 2.1内置天线选型与设计.................................................................................................39 2.2外置天线选型与设计.................................................................................................40 2.3天线选型的一般原则.................................................................................................40 3现有天线的厂家情况分析与合作建议 .............................................................................41 3.1现有天线厂商和技术规模对比 ..................................................................................41 3.2天线厂商的选择策略........................................................................................................43 3.3天线厂家的一般的合作过程......................................................................................44密级 confidentiality level2004-04-20版权所有，侵权必究All rights reserved第2页,共45页Page 2 , Total45表目录 List of Tables表1 XX表 Table 1 XX....................................................................................................................2密级 confidentiality level2004-04-20版权所有，侵权必究All rights reserved第3页,共45页Page 3 , Total45图目录 List of Figures图1 螺旋天线.................................................................................................................................8 图2 PCB板螺旋天线 ......................................................................................................................8 图3 介质振荡天线 .........................................................................................................................9 图4 用在上的PIFA天线 ........................................................................................................10 图5 。