小波矩量法分析环形微带缝隙天线*

将矩量法和小波变换理论结合起来,应用于求解电磁场积分方程,分析计算了环形微带缝隙天线磁流分布、驻波、阻抗特性和辐射方向图,通过用小波基代替一般的分域基矩量法中的权函数和基函数,使矩量法中与算子相对应的阻抗矩阵变成为大量元素为零的稀疏矩阵,减小了数值方法对存储量的要求,在达到允许精度的前提下,使计算量显著降低。文中给出计算实例,验证该方法,计算结果与用一般矩量法计算结果和实际测试结果相比,吻合较好。

Analysis of Annular Microstrip Slot Antenna Using WMOM

In this paper, wavelet-method and the method of moment(MOM) are combined to analyze and calculate the electric field integral equations(EFIE), as a result, the magnetic current distribution, return loss, impedance, and the radiation pattern are obtained, the usual expansions and weighting functions in MOM are replaced by wavelet expansions,which makes the impedance matrix sparse. This method reduced the numerical method to the reserves request, under the premise of the permission precision, fast algorithm caused the computation amount greatly to be reduced. Therefore, the calculating time is reduced, and good agreement between experiment and calculation is achieved.