【摘要】 采用时域有限差分法与Floquet定理相结合,对由正方形金属柱构成的二维电磁带隙结构的传输特性进行了分析和计算,得到了不同频率的平面电磁波在不同角度入射时,该结构的传输参数及电磁特性。通过改变金属方柱的边长和间距,得到了电磁带隙结构的阻带中心频率的变化规律,进而得到了拟合公式,该公式计算结果与仿真结果间最大误差不超过2%,具有较好的可靠性和较高精度,可用于EBG结构的应用研究。更多还原

【Abstract】 In this paper,the Finite Difference in Time Domain(FDTD) method with Floquet theorem is applied to analyze the transmission characteristics of a 2-D EBG structure,which is an array of square metal rods.The transmission parameters and electromagnetic characteristics are obtained while a plane electromagnetic wave at different frequencies is incident under oblique or perpendicular condition.By altering the parameters of the EBG structure,such as the size of the square metal rod or the distance between two metal rods,an empirical formula of the central frequency of the electromagnetic band-gap is achieved.Further results show that the empirical formula is reliable and accurate with an error less than 2%,and it can be applied to the design of EBG structures.更多还原