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徐善驾 《电子科学学刊(英文版)》1989,(3)
The dispersion characteristics of a class of closed dielectric waveguides are investigated by themethod which combines the building-block approach of multimode network theory with the rigorous modematching procedure.Several numerical examples for difrerent guiding structures have been given by the ap-proach.The same structures are also analyzed with the finite element method and the EDC method forcomparison.The calculations show that the present approach yields as highly accurate results as the finite ele-ment method while almost retaining the simplicity of the EDC method,and justify the utility of the presentmethod. 相似文献
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毫米波LFMCW雷达调频非线性剩余频差的估计 总被引:1,自引:0,他引:1
针对LFMCW雷达中调频非线性剩余频率误差的估计问题,提出了一种基于过零检测和周期图的参数估计方法,详细分析了相位调制正弦信号的过零检测误差,仿真试验表明,该方法能够精确地估计调频非线性剩余频差,具有较高的运算效率,并给出了一个实际试验结果。 相似文献
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ANALYSIS OF DISPERSION CHARACTERISTICS FOR A CIRCULAR DIELECTRIC WAVEGUIDE WITH PERIODIC METALLIC STRIPS 总被引:1,自引:0,他引:1
The dispersion characteristics of a circular dielectric waveguide with periodic metal-lic strips are analyzed by the Galerkin's method.After obtaining the rigorous dispersion equation,the dispersion curves for both TE_(01)and TM_(01)modes are calculated by the improved Newton'smethod.The variations of the normalized center frequency,width and maximum attenuation con-stant of the stopband with the normalized width of the metallic strips are given.The convergenceproperties of numerical solutions are also discussed.On the basis of the analysis,some usefulguidelines for filter design are thereby suggested. 相似文献
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本文用高次有限元法分析了任意形状槽波导的色散和损耗特性。该方法的有效性和可靠性由实验和其它计算结果所证实。文中对诸如如矩形,三角形,抛物,椭圆和余弦等形状的槽波导进行了系统的研究。计算结果表明,不同形状槽波导具有相近的色散特性,但损耗相差很大,其中V形槽波导损耗最小,大约是矩形槽波导的一半。文中给出的曲线可供设计槽波导元件和电路时参考。 相似文献
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基于距离差信息的多基地雷达的布局和定位精度分析 总被引:5,自引:0,他引:5
本文首先给出了基于距离差定位的误差概率分布;然后根据误差协方差矩阵和两种常用的定位精度度量准则关系,利用最小误差椭球准则,给出了在对称地面上对空中目标进行定位的最优布局方法;最后给出了一些计算结果。 相似文献
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用三维边缘元方法分析了有间隙Ⅱ-Ⅵ族半导体材料的散射特性,该方法直接从泛函变分出发避开了其它方法中示肯损超薄介质填充波导本征值和本片函数的困难,简化了求解过程,计算结果与实验值的比较证实了本方法具有有效,可靠和精确的特点。 相似文献