并联介质加载偶极天线脉冲辐射特性的研究

应用FDTD方法和PML技术，对馈电区一侧放置介质块的电阻加载偶极天线的时域辐射特性进行了研究，发现这种天线具有良好的方向性.分析了加载介质块的尺寸和介电常数对脉冲辐射特性的影响，给出了能够产生良好方向性而且辐射效率又不至于很低的天线结构参数.并联介质加载脉冲天线的低轮廓特点使其容易与电路集成，非常适用于UWB这样的超宽带无线通信系统. 关键词： 脉冲天线 辐射特性 介质加载 时域有限差分方法

Study on the radiation characteristics of the dielectric parallelly loaded dipole antenna for pulse radiation

The time-domain radiation characteristics of the resistance-loaded dip ole antenna with dielectric block parallelly connected to one side of the feedin g region are studied by using finite difference time_domain(FDTD) method and per fectly matched layer(PML) technique. It is found that th is kind of antenna has very well directive property. The influences of the size and dielectric constant of the loaded dielectric block on the radiation characte ristics of the antenna are analyzed. The optimum structure parameters of antenna s with very well directivity and enough efficiency are given. The low profile pr operty of this kind of antenna makes it easier to integrate with circuit. It is preferable for the ultra-wide band wireless communication system, such as UWB s ystem, to use this kind of antenna.