An efficient hybrid method based on the method of moments （MOM） and physical optics （PO） for the analysis of radiation characteristics of an electrically large antenna-radome system is presented. Specifically, MOM...An efficient hybrid method based on the method of moments （MOM） and physical optics （PO） for the analysis of radiation characteristics of an electrically large antenna-radome system is presented. Specifically, MOM is first applied to the antenna to find the current on its surface, and then the equivalent PO currents produced by the antenna radiation are assumed on the radome wall. When the coupling of the PO currents and antenna current is considered, the coupling matrix is divided into a series of partial matrices, in order to deduce the memory requirement and accelerate the evaluation process. Numerical results indicate that the proposed hybrid PO-MOM method is accurate and efficient.展开更多
为了克服传统电磁场仿真方法不能有效解决某些特殊结构电磁辐射问题的弊端,充分借鉴矩量法(Method of Moment,MoM)和物理光学法(PO)各自的优点,提出一种MoM-PO混合方法。MoM-PO混合方法将天线划分为2个区域,并将2个区域用三角面元剖分,...为了克服传统电磁场仿真方法不能有效解决某些特殊结构电磁辐射问题的弊端,充分借鉴矩量法(Method of Moment,MoM)和物理光学法(PO)各自的优点,提出一种MoM-PO混合方法。MoM-PO混合方法将天线划分为2个区域,并将2个区域用三角面元剖分,并在2个区域采用相同的屋顶基函数(RWG)来表征各自的表面电流,保证了2个区域边界上的电流连续性。分别在2个区域上应用MoM和PO,得到离散的矩阵方程,求解后即得电流分布。经数值算例验证,MoM-PO混合方法较传统的高频法,精度大大提高,与矩量法相比又在很大程度上减少了计算量,缩短了计算时间,是一种有效的电磁场计算方法。展开更多
基金the National Natural Science Foundation of China (60471040)
文摘An efficient hybrid method based on the method of moments （MOM） and physical optics （PO） for the analysis of radiation characteristics of an electrically large antenna-radome system is presented. Specifically, MOM is first applied to the antenna to find the current on its surface, and then the equivalent PO currents produced by the antenna radiation are assumed on the radome wall. When the coupling of the PO currents and antenna current is considered, the coupling matrix is divided into a series of partial matrices, in order to deduce the memory requirement and accelerate the evaluation process. Numerical results indicate that the proposed hybrid PO-MOM method is accurate and efficient.
文摘为了克服传统电磁场仿真方法不能有效解决某些特殊结构电磁辐射问题的弊端,充分借鉴矩量法(Method of Moment,MoM)和物理光学法(PO)各自的优点,提出一种MoM-PO混合方法。MoM-PO混合方法将天线划分为2个区域,并将2个区域用三角面元剖分,并在2个区域采用相同的屋顶基函数(RWG)来表征各自的表面电流,保证了2个区域边界上的电流连续性。分别在2个区域上应用MoM和PO,得到离散的矩阵方程,求解后即得电流分布。经数值算例验证,MoM-PO混合方法较传统的高频法,精度大大提高,与矩量法相比又在很大程度上减少了计算量,缩短了计算时间,是一种有效的电磁场计算方法。
