Design and experiment of ultra-wideband matching feed structure
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摘要: 设计研制了一种低阻抗传输线向高阻抗超宽带天线馈电的馈电结构，理想情况下，该馈电方法可实现特性阻抗为50 的同轴传输线向特性阻抗为200 的超宽带天线匹配馈电。分别用TEM喇叭天线和抛物反射面天线进行了实验验证，结果表明，与同轴线直接馈电相比，采用该匹配馈电结构后，TEM喇叭天线的辐射场强提高了15%，反射面天线的辐射场强提高了27%。Abstract: The design of an UWB matching feed structure was presented. The structure adopted a series-parallel hybrid feed method. In an ideal conditions, the structure could feed for a 200 UWB antenna from a 50 coax without reflection. Experiments based on TEM horns and reflector antenna with the structure were done. The results showed that the performance of the antennas was greatly improved, the radiated field of TEM horn increased up to 15% and the reflector antenna increased up to 27% correspondingly.
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Key words:
- ultra-wideband /
- antenna /
- feed /
- transmission line transformer /
- impedance matching /
- TEM horn
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