共查询到12条相似文献,搜索用时 62 毫秒
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用有限差分方法分析不对称脊波导中脊位置变化时对主模截止波长的影响。截止波长可以通过脊位量的调整而调整。并给出了一些计算数据。 相似文献
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《Microwave Theory and Techniques》1961,9(4):363-364
When electromagnetic waves propagate in waveguides of nonsimple cross section, no exact solution can be obtained by the conventional method of solving the wave equation by separation of variables. In such cases approximations are available such as perturbation methods, variational methods, etc. 相似文献
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Modes and Cutoff Frequencies of Crossed Rectangular Waveguides 总被引:1,自引:0,他引:1
《Microwave Theory and Techniques》1977,25(7):585-588
One complete solution is presented for determining the electromagnetic field of a generalized crossed rectangular waveguide. The method adopted is that of partial regions. Cutoff frequencies of symmetrical crossed waveguides are presented as an example. The results, even for low-order approximations, correspond well with the only experimental results available in the literature. 相似文献
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在计算任意波导截面TM 波截止波数的问题上,矩量法不可避免的要处理奇异点的问题,因此在快速性和简洁性上均存在很大不足。本文提出了一种便捷的计算方法:首先推导出相应截止波数下波导的电场积分方程,采用Gauss-Legendre公式将积分数值化,然后运用矩量法进行处理后得到一个矩阵方程,最后利用迭代法找出这个矩阵的特征值,从而避开了奇异点使得问题的求解更加便捷。 相似文献
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《Microwave Theory and Techniques》1971,19(5):431-442
Many types of coupled structures are used to design microwave filters and equalizers. One such structure is the array of coupled parallel commensurate conductors called a meander line. There are several analysis techniques that may be used to find the equivalent circuit of a meander line. However, these do not provide exact design equations. In this paper, meander-line networks are analyzed and synthesized using the graph-transformation technique. The equivalent circuits of one- and two-port meander-line networks will be developed by using the transformation method, and it will be shown that meander-line networks can be easily designed by using the electronic computer. 相似文献
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用FDTD法计算矩形波导中E面膜片的等效参数 总被引:1,自引:0,他引:1
本文用时域有限差分法计算了矩形波导中E面膜片的等效参量,为了很好好吸收波导中的散射波,采用了一种高精度的稳定的色散边界条件来截断计算空间。在考虑膜片厚度时,本文用环路积分法建立起膜片附近的修正迭代格式,所得结果与文献中的结果吻合。 相似文献
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本文给出一种新方法,用多层平板波导逼近非均匀平面波导,借助递推公式用牛顿切线法求解本征值方程,以求出非均匀平面波导导模的传播常数与模场分布。本方法优点在于程序简短通用,计算工作量小,求得结果与精确数值解十分吻合(直至近截止区)。本文给出了各种类型的非对称与对称渐变折射率平面波导的结果。 相似文献
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张知群 《电气电子教学学报》2010,32(6):31-34
本文提出一种等效,方程求解和分析的新方法:从负反馈放大母体等效电路中定义一个开环增益和-个反馈系数,用解方程及分析方法证明闭环增益定理,即适用于各种输入下各节点电位和各支路电流的闭环增益通式,导出闭环输入和输出电阻。我们用表达式把闭环特性与零受控特性、理想态特性、反馈深度和接近因子等联系在-起。 相似文献