HFSS高精度导航天线研究
毕业论文关键词 微带天线 圆极化 多馈 高精度
Title Research on high precision navigation antenna
Abstract The satellite navigation and positioning technology is developing rapidlyin this information expansion age and also applied in more and more widefield.As an important part of satellite navigation receiver,theperformance of high-precision measurement antennas is derectly related tothe measurement accuracy of satellite navigation receiver.Antenna phasecenter variations and multipath are significant measurement errorsources in high-precision satellite navigation system.In order to meet torequirements of antennas with the high-precision measurements,in thispaper,single-frequency microstrip antenna has been designed and optimizedby simulation software of HFSS.Firstly, The paper reviews microstrip antennas's history and introducesits definition, structure and the p rinciple of radiation , then microstripantennas's several analysis methods have been given . Secondly, theprinciple and the realization of the microstrip antennas ’ circularpolarization as well as the microstrip antennas's feed methods are alsointroducted. Afterwards,a signal-frequency circularly polarizedmicrostrip antenna which adopts four-fed point technique and feed-networkis designed with the help of simulation of HFSS.The multi-fed pointtechnique makes the microstrip antenna phase center more stable andachieves the circular polarization in the wide-angle. Lastly,the technicalindexes of return loss ， axial ratio and pattern are analyz ed.Bycomparing the simulation value and the m easured value , it ’ s found that the feed - network broade ns the bandwidth, while the axial ratio show spoor performance because of the i rregular shape of the antenna., matchingand other possible reasons. The gain has dropped a lot due to the feed -network and by the coupling theory, the paper puts forward some analysisand comment on this phenomenon.
Key words microstrip antenna circular polarization multi-fedhigh-precision
目 次
1 引言（或绪论 ） 1
1.1 研究背景 1
1.2 国内外研究动态 1
1.3 本文内容安排 2
2 微带天线基本知识 3
2.1 微带天线定义和结构 3
2.2 微带天线工作原理 4
2.3 微带天线馈电方式 5
2.4 微带天线主要分析方法 6
2. 5 腔模理论 6
3 微带天线圆极化 1 1
3.1 圆极化波的性质 1 1
3.2 圆极化天线的参数 1 2
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