MOM、MOM-PO及HEMI在载体天线问题中的比较  

Comparisons Between the Methods of MOM,MOM-PO and HEMI in Platform-Wire Antenna Problems

作　　者：宗显政[1] 聂在平[1] 阙肖峰[1] 

机构地区：[1]电子科技大学电子工程学院成都610054

出　　处：《电子科技大学学报》2009年第3期325-328,共4页Journal of University of Electronic Science and Technology of China

基　　金：国家自然科学基金重点资助项目(60431010)

摘　　要：在传统矩量法(MOM)的基础上,对其与物理光学(PO)混合的方法(MOM-PO)以及电磁场积分方程混合迭代方法(HEMI)进行了详细的推导,从物理机制、计算成本、数值结果的精度等方面比较了3种方法的异同。数值算例表明,HEMI的输入阻抗及辐射方向图结果均能与MOM很好地吻合,同时在较大程度上节约了计算时间;而MOM-PO虽然在计算时间及内存消耗上均显著优于上述两种方法,但小尺寸结果的精度相对较差,特别是方向图,在小尺寸情况下,主瓣、旁瓣及后瓣上均存在较大误差。Based on the traditional moment of method （MOM）, a method combined with the physical optics （PO）, namely MOM-PO, is described in detail. An iterative method from the combination of the electrical-field integral equation （EFIE） and the magnetic-field integral equation （MFIE）, so called HEMI, is also introduced. The three presented methods are compared in physical mechanism, calculating costly and numerical precision. Numerical examples validate the corresponding analyses well. The input impedance and the radiation pattern results of the HEMI agree well with those obtained using MOM. The computing time can be saved to a large extent. Although the MOM-PO method remarkably excels the other two in computing time and memory cost, it gives relatively poor precision results for electrically small problem cases, especially in the radiation patterns. For small cases, MOM-PO produces obvious errors in the main, the side and the back lobes.

关 键 词：天线 混合迭代方法 矩量法 物理光学 

分 类 号：TN82[电子电信—信息与通信工程]