共查询到17条相似文献,搜索用时 109 毫秒
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不对称脊波导的传输特性 总被引:5,自引:0,他引:5
提出了用有限差分方法分析不对称脊波导主模的截止波长和场结构图等传输特性,推导出用有限差分方法计算相关参数的公式。脊波导中主模的截止波长可随脊位置的变化而变化。文中编程计算了不对称脊波导、L型波导脊位置变化时截止波长和场结构的变化规律,给出了计算数据和曲线图。计算结果与相关文献非常吻合,证明文中提出的计算方法和计算结果是正确和可行的。 相似文献
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将有限元方法引入到直角梯形脊波导传输特性的讨论中,求解了直角梯形脊波导的主模截止波长、单模带宽以及典型尺寸的场结构图,分析了直角梯形脊波导中脊上下底宽度以及脊高度变化对其传输特性的影响,并给出了相应的计算数据和图示。 相似文献
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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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双脊波导中脊的变形对脊波导的截止波长影响很复杂,本文采用对亥姆霍兹方程有限元方法进行分析,并对接近于矩形脊波导的梯形和椭圆形脊波导的主模截止波长进行计算,分析变化趋势,以为变形脊波导的研究提供一定参考数值。 相似文献
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脊波导各种参数的计算 总被引:1,自引:0,他引:1
给出脊波导的主要参数:主模截止波长、脊波导单模工作带宽、脊波导特性阻抗、脊波导功率容量、脊波导衰减,及各参数的完备计算方法、部分参数的修正曲线。 相似文献
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运用矢量有限元方法对脊位于窄边的四种加载介质双脊波导的主模截止波长和单模带宽特性进行了计算和分析,四种波导分别为脊位于窄边的加载介质双脊矩形波导、加载介质双脊梯形波导、加载介质双脊V形波导以及加载介质双脊椭圆形波导。计算结果表明,脊位于窄边的四种加载介质双脊波导的两种传输特性总体相似,和脊位于宽边相比,脊位于窄边的主模归一化截止波长和单模带宽总体小很多,且脊位于宽边时的特性变化趋势比脊位于窄边时剧烈。这些计算结果将有助于微波器件及微波系统的设计。 相似文献
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《Microwave Theory and Techniques》1957,5(1):12-17
In this paper an algebraic expression which constitutes an approximation to Cohn's transcendental equation is given for the determination of the dominant-mode cutoff wavelength of ridge waveguides. A modified derivation of Mihran's equation for calculating the characteristic impedance of ridge waveguides is discussed. Based upon these formulas, nomography are constructed to permit the determination of these parameters with sufficient accuracy when the waveguide and the ridge dimensions vary. Experimental verification of the calculated cutoff wavelength is included. 相似文献
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Xiao-Qiang Chen En-En Ren Mai Lu Tao Wang Lei Wang 《Journal of Infrared, Millimeter and Terahertz Waves》2010,31(9):1005-1014
As a new kind of broadband microwave component, transmission characteristics of the dominant TE mode in inverted trapezoidal-ridge
waveguide have been analyzed by finite element method. Variations of the cutoff wavelength, single-mode bandwidth, field patterns,
characteristic impedance, attenuation constant and power-handling capacity with the varied ridge dimensions have been investigated
in details. The longer cutoff wavelength, broader single mode bandwidth and lower characteristic impedance can be achieved
for smaller ridge gap. While the lower attenuation and higher power-handling capacity can be realized for larger ridge gap.
Numerical results in this paper provide an extension to the existing design data for ridge waveguide and are considered helpful
in microwave and millimeter-wave applications. 相似文献
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Guojian Li Fuyong Xu Aning Ma Yinqin Cheng 《Journal of Infrared, Millimeter and Terahertz Waves》2007,28(9):725-732
A new kind of V-ridge waveguide is presented in this paper. The transmission problem is solved by edge element for the first time. The field patterns of the waveguide with single, double and triple V-ridge for different values of dielectric constant have been presented. Variations of the cutoff wavelength, single-mode bandwidth with the ridge dimensions for different values of dielectric constant are investigated in detail. The results will be of practical significance in designing ridge waveguide components in microwave and millimeter wave engineering. 相似文献
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