收稿日期: 2010-11-24
修回日期: 2010-12-30
网络出版日期: 2011-07-30
基金资助
国家自然科学基金(No.60872034,No.60971029)； 教育部新世纪优秀人才计划基金(No.NCET070154)； 国防预研基金(No.ZJ10DZ02111)；航空科技基金(No.20090180007)资助
Design of UHF Truncated Monopole Antenna and Its Matching Network
Received date: 2010-11-24
Revised date: 2010-12-30
Online published: 2011-07-30
Supported by
国家自然科学基金(No.60872034,No.60971029)； 教育部新世纪优秀人才计划基金(No.NCET070154)； 国防预研基金(No.ZJ10DZ02111)；航空科技基金(No.20090180007)资助
设计了一个工作在UHF频段的宽带单极子天线. 先将单极子天线截为两段并串联起来，以改善天线频率高端的水平方向增益，然后利用无耗LC梯形宽带匹配网络在100?400 MHz对天线进行匹配. 用CST2009仿真软件得到优化的天线截断位置和匹配网络元件值等参数. 对加载匹配网络前后的截断天线反射系数进行了测试，结果与仿真结果吻合较好. 研究表明，加载匹配网络后的天线系统水平增益在100?350 MHz频段大于0 dBi，在350?400 MHz频段介于?7 ?0 dBi之间. 反射系数S11在100?400 MHz频段均小于10 dB，匹配网络效率超过60%.
张俊睿， 肖绍球， 丁霄， 唐明春， 柏艳英 . UHF截断单极子天线及其匹配网络设计[J]. 应用科学学报, 2011 , 29(4) : 423 -427 . DOI: 10.3969/j.issn.0255-8297.2011.04.015
A broadband monopole antenna working in UHF band is designed. A monopole antenna is cut
into two parts. They are connected in series. This step improves the horizontal gain in the upper part of the
operating band. A lossless LC ladder is then used to match the antenna impedance from 100 MHz to 400 MHz.
The truncating position and circuit element parameters in the matching network are obtained using CST2009
optimization. Reflection coefficients of the truncated antennas both with and without the matching network
are measured, showing good agreement with the simulation results. The following conclusions are drawn. The
gain in the horizontal direction of the antenna with matching network is more than 0 dBi between 100 MHz
and 350 MHz, and stays within ?7 ?0 dBi from 350 MHz to 400 MHz. The simulated reflection coefficient S11
of the antenna is below 10 dB within 100 MHz and 400 MHz. The efficiency is over 60% within the operating
band.
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