渐变平板表面波天线反射和辐射特性的分析

Analysis for Reflection and Radiation Characteristics of Tapered Planar Dielectric Surface Wave Antenna

本文应用有限元和模匹配相结合的方法，采用阶梯近似及阻抗转移技术，分析了渐变平板介质表面波天线的反射和辐射特性。与常规的从场源关系出发来分析辐射问题的方法不同，本文方法从求解介质导波结构的本征值问题入手，从散射的角度将辐射问题转化为表面波和空间波的传输问题，从而使分析过程得到了很大的简化。

In this paper,the reflection and radiation characteristics of tapered planar dielectric surfacc wave antenna is analyzed by a method which combines the finite element method with the mode matching procedure,using the techniques of staircase approximation and impedance transformation.Unlike the conventional method to treat the radiation as a “source field” problem,in the present approach,the eigenvalue problem of dielectric guided wave structures is solved first,and then the radiation problem is transferred to the propagation problem of surface waves and space waves from the viewpoint of scattering ,as a result,the analysis procedure is tremendously simplified.