UHF 频段卫星通信螺旋天线的设计

摘要

近代以来，天线的研究成为电磁领域的重要内容，与此同时螺旋天线具有阻抗平稳性好，波束宽度宽，方向性好等较为优越的性能被广泛地应用于航天，定位，气象，中继等诸多领域。首先对工作在 U HF 频段的螺旋天线进行系统理论分析，建立仿真模型，对方向图，宽带阻抗及增益等性能指标进行分析，再进行实物制作，现场测试分析。实验表明，该螺旋天线的设计和制作是成功的，其天线性能较好，可用于 U HF 频段卫星通信信号的接收与发射。%Since modern times ,the antenna research has become an important content electromagnetic field .Mean-while ,spiral antenna has the advantages of impedance good stability ,wide beam width and directivity ,which is widely used in aerospace ,location ,weather ,relay and many other fields .Firstly ,a system theory analysis is made for the U HF frequen-cy band satellite communication spiral antenna ,a simulation model is established ,are carried on broadband impedance and gain performance index are analyzed ,then the physical production ,field test and analysis .It shows that the spiral antenna design and production are successful ,whose performance is good .It can be used in U HF band satellite communication signal receiving and sending .