电-磁振子组合型超宽带天线数值分析
Numerical analysis of electric-magnetic vibrator combined ultrawideband antenna
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摘要: 采用CST MICROWAVE STUDIO电磁场数值计算软件,对电-磁振子组合型超宽带（UWB）天线结构参数与天线性能之间的物理关系进行了分析。电磁组合型天线的物理结构包括三部分：天线的馈电系统、TEM喇叭辐射单元和电流环辐射单元。激励源采用高斯脉冲，边界为6层理想吸收边界（PML6）。仿真结果表明：组合天线的外导体屏蔽和电流环分别改善了不同频带内的端口参数；当电流环周长(105 cm)约等于天线尺寸(50 cm)的2倍时，天线的反射能量较小，端口参数曲线平坦；天线的物理尺寸决定其辐射带宽，尺寸越大，低频辐射特性越好。Abstract: Applying CST electromagnetic software, using Guass pulse and PML6 boundary condition, the relation between physical structural parameters and performance of the electric-magnetic vibrator combined ultrawideband (UWB) antenna was investigated. The results indicate the conductor screen and current loop of antenna improve port parameter of different frequency. When the total lergth of current loop with 105 cm is about twice as antenna size with 50 cm, the reflected energy of antenna is less and the port parameter is flatted. Radiation bandwidth of antenna is decided by its physicl size, and the bigger the antenna size is, the better the radiated performance of low frequency is.
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Key words:
- high power microwave /
- uwb antenna /
- combined antenna /
- eelectric-magnetic vibrator /
- cst code
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