基于高低频混合方法的梅利逼近扫频技术

Frequency sweep technology using Maehly approximation based on MoM-PO hybrid method

将矩量法(MoM)和物理光学(PO)混合方法与梅利逼近结合分析了电大载体平台上天线的宽带辐射特性.在切比雪夫逼近的基础上,通过梅利展开技术实现快速扫频,并利用MoM-PO方法减少矩阵方程中未知量个数,从而大大降低了内存需求和计算时间.相比于切比雪夫逼近,由于梅利展开式为有理函数,提高了计算精度.数值结果表明:该方法可以快速有效地分析大型载体平台上天线的宽带特性.

MoM-PO hybrid method in conjunction with Maehly approximation tech- nique is applied to the wide-band analysis of antennas around an electrically large platform in this paper. Based on the Chebyshev approximation, the Maehly expan- sion is developed to achieve fast frequency sweeping. Furthermore, MoM-PO hy- brid formulation is employed to reduce the number of unknowns in the matrix equa- tion, thus the memory requirements and the solution time can be reduced. Com- pared with Chebyshev approximation, the presented algorithm is more accurate since Maehly expansion is a rational function. Numerical results show that the pro- posed technique is efficient for wide-band analysis of antennas around a conducting platform.