探针激励的介质层加载柱面共形微带天线的格林函数研究

Analysis of the Green’s Function for the Probe-fed Cylindrically Conformal Microstrip Antenna with Dielectric Superstrate

柱面分层结构,尤其是加载介质层的圆柱微带结构对于共形天线及天线罩的研究设计具有重要意义.本文通过严格的全波方法推导出适合于数值计算的介质层加载柱面共形微带结构的谱域格林函数,并首次导出此结构下沿细探针的径向电流源产生的入射场的具体形式.最终,在此格林函数基础上,应用矩量法计算出天线的表面电流.数值结果证明了本方法的准确性.

The cylindrically stratified structures,especially the cylindrical microstrip structures with dielectric superstrates,have important significance for the conformal antenna and radome design.A spectral-domain Green’s function of the superstrate-loaded cylindrically conformal microstrip structure,which is suitable for numerical calculations,is developed through the rigorous full-wave analysis in this paper.Also,the specific expressions of the incident electric fields generated by the radial current along the probe are given explicitly for this structure.On the basis of the derivations,the surface electric current is calculated via the method of moments ultimately.Numerical results indicate the correctness of the proposed method.