用FDTD法及AR模型分析鳍线不连续性  

Analysis of the Finline Discontinuitieswith FDTD Method and AR Model

作　　者：周健义[1] 杨铨让[1] 刘瑞翔 

机构地区：[1]东南大学毫米波国家重点实验室

出　　处：《电子学报》1997年第3期55-58,共4页Acta Electronica Sinica

基　　金：国家自然科学基金

摘　　要：本文用ＦＤＴＤ法分析了几种典型的鳍线不连续性．因鳍线的色散较大，本文用一种稳定的高阶ＤＢＣ来改善截断边界的吸收性能．为了减少计算时间，由ＦＤＴＤ算法迭代所得的较少数据建立起ＡＲ模型，由此预报出后面的ＦＤＴＤ数据，从而得到较高精度的结果．本文的结果同文献中报道的结果吻合得相当好．The analysis of several typical finline discontinuities with the FDTD is presented. Because of the strong dispersion of the finline, a high-order stable DBC is used to improve the absorbing performance of the truncated boundary. In order to save the calculating time, a shorter data from the FDTD algorithm was used to set up AR model. Then the AR model was used to predict future FDTD data so that more accurate solution can be got. The results agree well with the references.

关 键 词：鳍线 不连续性 时域有限差分法 AR模型 毫米波 

分 类 号：TN811.702[电子电信—信息与通信工程]