非全向介质谐振天线的数值模拟

在PC机上对一个非全向介质辐射器（UDR）模型进行了FDTD模拟，求出了远场区辐射方向图，观察了脉冲波形的传播过程，讨论了前后功率流动情况，得出了的数值结果与实测有较好的吻合，证明了这是一种仅在正前方有极强辐射的波束高增益天线雏形，它的这种特性较适合应用于卫星通讯天线和移动通信的手机天线，它的方向图增益较单极子天线有极大的提高；此外，这种天线模型也可应用于车载天线、空间功率合成器。

Numerical Simulation of an Unidirectional Dielectric Radiator

A unidirectional dielectric radiator for antenna is simulated with FDTD method on PC,the propagation of the pulse waveform is observed,the radiation pattern is described,the numerical results is identical with experimental results,the simulation results indicate that this type of model with broad beamwidth and good gain gives off radiation only in forward direction,so it could find application in mobile communication handset,it also could be used in satellite communication,anti-collision radar and space power combining circuits.