【摘要】 应用AWE技术结合矩量法分析了某型八木天线的辐射特性。首先采用矩量法求解八木天线的电场积分方程 ,得到某一频率点的电流分布和输入阻抗 ;通过Pade逼近[5] 获得任意频率的导纳 ,从而得到该型八木天线的频率响应 ;给出了天线上的电流分布、输入导纳以及辐射方向图 ,对AWE MOM与MOM的计算结果进行了比较 ,两者比较接近 ,但AWE MOM可大大加快计算速度更多还原

【Abstract】 In this paper, the method of moments (MOM) in conjunction with the asymptotic waveform evaluation (AWE) technique is applied to analyze the radiation of a Yagi antenna in engineering.The electric field integral equation (EFIE) is solved using MOM to obtain the current on the antenna. In the AWE technique, the current at a given frequency is expanded as a Taylor′s series for the desired frequency band. The coefficients of Taylor′s series are then matched via the pade approximation to a rational function, and the current is obtained to calculate the impedance of the antenna at any a frequenay point. Finally, the current distribution, input impedance and radiation patterns are presented. A comparison between the result of AWE/MOM and that of MOM shows that two methods have a good agreement, but the AWE/MOM can save considerable CPU time.更多还原