MoM-NPO混合算法分析天线-载体系统

Analyzing Antenna-Plateform System with Hybrid MoM-PO Method

安装在电大尺寸平台上的天线,载体的影响不容忽视。采用同样基于电流展开的矩量——物理光学混合算法,并通过NURBS物理光学法进一步降低复杂结构的建模和计算,将载体对天线的影响用物理光学电流合并到包括天线的在内较小的矩量法区,使矩量法解决天线-载体系统成为可能。通过矩量法和混合算法分析载体对天线性能的影响证明,载体对天线的影响是显著的,混合算法能够在保证精度的前提下提高运算速度,为解决电大尺寸载体上天线的特性提供了良好的途径。

Influence of electrical large platform on antennas can not be ignored when designing effective electric system. In this article, a hybrid technique, which combines two current-based method： Method of Moment（MoM） and Physical Optics（PO）, is preferred to take the platform effects into account through PO current when solving the antenna by MoM, and the NURBUS-PO is applied further to reduce the complexity of modeling and computation, thereby making it impossible to solve the antenna-platform system through MoM. The analyzing results of MoM and hybrid technique show that the effects of platform is obvious, while the hybrid technique is accurate enough and spare great computational time and storage, providing a good access to solve the EM characters of antennas on electrical large carrier.