微带阵列互耦的时域有限差分法(FDTD)仿真  

FDTD Analysis of Mutual Coupling in Microstrip Array Antennas

作　　者：郭陈江[1] 王小平[1] 丁君[1] 王一笑[1] 于海洋[1] 

机构地区：[1]西北工业大学电子信息学院,西安710072

出　　处：《系统仿真学报》2009年第3期680-683,共4页Journal of System Simulation

摘　　要：在微带阵列天线中,贴片间的耦合是阵列性能下降的一个重要原因,对互耦进行正确的评估、计算,有助于深入了解阵列特性并指导设计工作。采用时域有限差分(FDTD)法计算微带贴片间的互耦系数,其中采用非均匀网格对天线进行网格剖分,并引入了电阻性电压源,在保证计算精度的前提下,大大节省了计算空间和计算机时间。利用N端口网络知识通过简单计算即可得到互耦系数,与传统方法相比降低了计算、编程难度,计算结果与矩量法及测量结果基本一致。In a microstrip antenna array, mutual coupling between the patches is a significant reason of performance degradation, thus an accurate evaluation of mutual coupling will be helpful to the designing work and the comprehension of the performance of antenna arrays. The mutual coupling of microstrip antenna arrays was calculated by the finite-difference time-domain （FDTD） method. Nonuniform mesh and a voltage source with a lumped resistance type internal impedance Were used in the model. The space of calculations and computer time are sharply reduced, but the numerical precision is not declined. The coupling coefficients were calculated from the standard N-port network theory. This method results in a reduction of computational and programming effort, when compared with the conventional method. The results of the simulation are found to be in close agreement with those derived by using the method of moments （MOM） and actual measurements.

关 键 词：微带天线 时域有限差分 互耦 完全匹配层 

分 类 号：TN82[电子电信—信息与通信工程]