时域有限差分法计算分析非对称共面波导色散特性
首发时间:2006-06-29
摘要:利用FDTD方法对ACPW的色散特性进行了计算与分析,给出了计算ACPW的FDTD全空间计算模型,取高斯脉冲的激励,选择Mur二阶吸收边界条件,计算得出几种结构的ACPW的特性阻抗Z0(ω),并绘出了Z0随频率变化的曲线。计算结果与测试值取得了良好的一致性。
关键词: 非对称共面波导 时域有限差分法 Mur边界条件 特性阻抗Z0 色散特性
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Calculation and Analysis of Dispersion Characteristic of ACPW Using FDTD Method
Abstract:Dispersion characteristic of asymmetrical coplanar waveguide (ACPW) using finite-difference time-domain (FDTD) method is presented, a FDTD-model of ACPW is advanced, and the transient propagating waveforms along the ACPW, which are excited by retarded Gaussian pulse, are found in the time domain. After the time-domain field distributions are obtained, frequency-domain parameters such as characteristic impedance Z0 are calculated using Fourier transformations. The results agree well with available theoretical and experimental data over a wide frequency range.
Keywords: asymmetrical coplanar waveguide finite-difference time-domain mur’s absorbing boundary condition characteristic impedance Z0 dispersion characteristic
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No.7380719471151561****
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