用磁性异向介质抑制共面天线间的表面波  

Surface wave suppression for coplanar antennas using magnetic metamaterial

作　　者：程响响[1] 

机构地区：[1]中国舰船研究设计中心,上海201108

出　　处：《电波科学学报》2014年第6期1140-1146,共7页Chinese Journal of Radio Science

摘　　要：从电磁波传播原理上说明可用磁性异向介质抑制舰载共面相控阵天线间的表面波,利用时域有限积分法在CST Microwave Studio中对理想导电体(Perfect Electric Conductor,PEC)平面上两个天线端口的仿真模型进行全波求解计算,结果表明:磁性异向介质不但可以在等效磁导率实部为负的频段内增大天线间的隔离度,而且在某些频率还能降低阵面天线模型的后向散射值,并分析了异向介质厚度的变化对电磁兼容性和整体隐身性的影响,异向介质厚度的选择与其电磁本构参数的确定同等重要.Based on electromagnetic wave theory, the paper demonstrates that magnetic metamaterial can be used to suppress the surface wave existing between the shipboard coplanar array antennas. A model containing two antenna ports on a perfect electric con- ductor（PEC） plane with a magnetic metamaterial slab in the middle is created in CST MWS and time-domain solver is applied by making use of finite integration time domain, （FITD） method. Simulation results indicates that magnetic metamaterial increases the i- solation between coplanar antennas in the frequency band where the real part of metama- terial effective permeability is negative, and the backscattering values are depressed sim- ultaneously. The thickness of magnetic metamaterial slab is found to be an important factor as well as its effective constitutive parameters, because both electromagnetic com- patibility （EMC） and stealth performance are influenced significantly by the thickness of metamaterial slab, but working in different directions.

关 键 词：表面波 异向介质 隔离度 后向散射 

分 类 号：TN011.4[电子电信—物理电子学]