The susceptance due to discontinuity of the sections of the septum is accounted for . then construction parameters of the bpf is determined applying network synthesis theory . by the accurate model and highly efficient iteration algorihtm , the e - plane metal suptum waveguide bpf can be designed rapidly and accurately 用此cad软件设计制做的e面单膜片滤波器、双膜片滤波器和混合膜片滤波器均很好地满足了设计指标的要求，能够应用在毫米波合成孔径雷达上。
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The design method of system structure and every compositive section is introduced . the graphics edit platform is developed , including edit software of transformer substation ' s diagram and diagram for calculating line - loss , then the method of coding is introduced , especially the transition from diagram to matrix of conductance and susceptance 开发了本系统的图形编辑平台，包括变电站接线图编辑软件和网损接线图编辑软件，分别对变电站接线图编辑软件和网损接线图编辑软件的实现过程进行了阐述，详述了从矢量图表示的电网图转化成导纳矩阵的过程。
