宽频带圆锥共形微带天线的CFDTD法分析

Analysis of the Broadband Conically Conformal Microstrip Antenna Using CFDTD Method

根据微带天线展宽频带的工作机理,基于共形时域有限差分(CFDTD)法,分别对工作在L波段和C波段的重叠贴片式和电容补偿式探针馈电圆锥共形微带天线的近远场特性做了分析.结果表明,与普通的单贴片结构天线相比,其带宽有了明显改善.在时域有限差分(FDTD)网格剖分时,采用了坐标系旋转的方法,以方便激励探针的建模,同时为了提高仿真的效率,引入了非均匀网格技术.

Based on the mechanism of the microstrip antenna,two practical broadband antennas,namely the stacked dual-patch and the capacitance compensated one,operated in the L and C band,respectively,are simulated by the conformal FDTD method.The results showed that the impedance bandwidths are improved significantly compared with the conventional single patch case.In order to treat the coaxial probe feeding easily in the modeling,a suitable coordinate transform is introduced.In addition,the non-uniform meshing technique is employed to accelerate numerical simulation.