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<TD width="653" bgColor=#ffffff height="29"><B><font face="楷体_GB2312" color="#000066" size="5">本期技术讲座：</font></B></TD>
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<p align="center"><B><FONT face=宋体
color=#0000cc> <FONT
size=5>天线基本知识及应用</FONT></FONT></B></p>
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<TD colSpan=2 width="716"><FONT face=楷体_GB2312
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color=#996633>移动通信系统是有线与无线的综合体，它是移动网络在其覆盖范围内，通过空中接口（无线）将移动台与基站联系起来，并进而与移动交换机相联系（有线）的复合体。而在移动通信系统中，空间无线信号的发射和接受都是依靠移动天线来实现的。因此，天线对于移动通信网络来说，举着举足轻重的作用，如果天线的选择（类型、位置）不好，或者天线的参数设置不当，都会直接影响整个移动通信网络的运行质量。尤其在基站数量多，站距小，载频数量多的高话务量地区，天线选择及参数设置是否合适，对移动通信网络的干扰，覆盖率接通率及全网服务质量都有很大影响。不同的地理环境，不同服务要求需要选用不同类型，不同规格的天线。天线调整在移动通信网络优化工作中有很大的作用。</FONT><BR><BR> 为了帮助大家对天线的知识有一定的了解以及在移动通信系统中的应用，推出“天线基本知识及应用”技术讲座。<BR><BR> 本讲座由网友张守国撰写提供，在此表示衷心的感谢！</FONT></TD></TR>
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<TD width="622"><B><SPAN lang=EN-US
style="COLOR: #333399"><FONT face=宋体 color=#0000cc
size=2>第一讲 </FONT></SPAN><FONT color=#0000cc
size=2><a href="ant01.htm">天线的基础知识</a></FONT></B></TD></TR>
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<TD width="622"><FONT face=宋体 color=#000000
size=2>1.1 <a href="ant01.htm#101">天线的输入阻抗</a></FONT></TD></TR>
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<TD width="622"><FONT color=#000000 size=2>1.2 <a href="ant01.htm#102">天线的极化方式</a></FONT></TD></TR>
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<TD width="622"><FONT color=#000000 size=2>1.3 <a href="ant01.htm#103">天线的增益</a></FONT></TD></TR>
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<TD width="622"><FONT color=#000000 size=2>1.4 <a href="ant01.htm#104">天线的波瓣宽度</a></FONT></TD></TR>
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<TD width="622"><FONT color=#000000 size=2>1.5 <a href="ant01.htm#105">前后比(FRONT-BACK
RATIO)</a></FONT></TD></TR>
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<TD width="622"><B><SPAN lang=EN-US
style="COLOR: #333399"><FONT face=宋体 color=#0000cc
size=2>第二讲 </FONT></SPAN><FONT color=#0000cc
size=2><a href="ant02.htm">天线的分类与选择<SPAN
lang=EN-US style="COLOR: #333399"><FONT face=宋体>
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style="FONT: 7pt 'Times New Roman'">
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<TD width="622"><FONT face=宋体 color=#000000
size=2>2.1 <a href="ant02.htm#201">全向天线</a></FONT></TD></TR>
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<TD width="622"><FONT face=宋体 color=#000000
size=2>2.2 <SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman"><a href="ant02.htm#202">定向天线</a></SPAN></FONT></TD></TR>
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<TD width="622"><FONT face=宋体 color=#000000
size=2>2.3 <SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman"><a href="ant02.htm#203">机械天线</a></SPAN></FONT></TD></TR>
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<TD width="622"><FONT color=#000000 size=2>2.4 <a href="ant02.htm#204">电调天线</a></FONT></TD></TR>
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<TD width="622"><FONT color=#000000 size=2>2.5 <a href="ant02.htm#205">双极化天线</a></FONT></TD></TR>
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<TD width="622"><B><SPAN lang=EN-US
style="COLOR: #333399"><FONT face=宋体 color=#0000cc
size=2>第三讲 <SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN><O:P></O:P></FONT><FONT color=#0000cc
size=2><O:P></O:P></FONT></SPAN><FONT
color=#0000cc size=2><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman"><a href="ant03.htm">移动通信系统天线安装规范</a></SPAN></FONT></B></TD></TR>
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<TD width="622"><B><SPAN lang=EN-US
style="COLOR: #333399"><FONT face=宋体 color=#0000cc
size=2>第四讲 <SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN><O:P></O:P><O:P></O:P><O:P></O:P><O:P></O:P><O:P></O:P></FONT><FONT
color=#0000cc size=2><O:P><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman"><a href="ant04.htm" target="_blank">移动通信系统天线参数调整</a></SPAN></O:P></FONT><FONT
color=#000000
size=2><O:P></O:P><O:P></O:P><O:P></O:P></FONT><FONT
color=#000000><O:P></O:P></FONT><O:P></O:P></SPAN></B></TD></TR>
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<TD width="622"><FONT face=宋体 color=#000000
size=2>4.1 <SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman"><a href="ant04.htm#401">天线高度的调整</a></SPAN></FONT></TD></TR>
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<TD width="622"><FONT color=#000000 size=2>4.2 <a href="ant04.htm#402">天线府仰角的调整</a></FONT></TD></TR>
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<TD width="622"><FONT color=#000000 size=2>4.3 <a href="ant04.htm#403">天线方位角的调整</a>
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<TD width="622"><FONT color=#000000 size=2>4.4 <a href="ant04.htm#404">天线位置的优化调整</a>
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<TD width="622"><B><SPAN lang=EN-US
style="COLOR: #333399"><FONT face=宋体 color=#0000cc
size=2>第五讲 </FONT><FONT color=#0000cc size=2><a href="ant05.htm">链路及空间无线传播损耗计算</a></FONT><A
href="http://www.mc21st.com/techfield/systech/ant/ant05.htm"><FONT
face=宋体 color=#0000cc size=2> <SPAN
style="FONT: 7pt 'Times New Roman'">
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<TD width="622"><FONT color=#000000 size=2>5.1
<SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman"><a href="ant05.htm#501">链路预算</a></SPAN><SPAN
lang=EN-US
style="mso-spacerun: yes"> </SPAN></FONT></TD></TR>
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<TD width="622"><FONT color=#000000 size=2>5.2 <a href="ant05.htm#502">各类损耗的确定</a></FONT></TD></TR>
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<TD width="622"><FONT color=#000000 size=2>5.3
<SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman"><a href="ant05.htm#503">无线传播特性</a></SPAN></FONT></TD></TR>
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<TD width="622"><FONT color=#000000 size=2>5.4
<SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman"><a href="ant05.htm#504">常用的两种电波传播模型</a></SPAN></FONT></TD></TR>
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<TD width="622"><FONT color=#000000 size=2>5.5 <a href="ant05.htm#505">参考覆盖标准</a></FONT></TD></TR>
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