Wave propagation on multifilar helices
Wave propagation on multifilar helices
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DOI：
10.1109/t-ed.1956.14094
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发表时间：
1956
期刊：
影响因子：
--
通讯作者：
H. R. Johnson;T. Everhart;A. Siegman
中科院分区：
文献类型：
--
作者：
H. R. Johnson;T. Everhart;A. Siegman
鞘层螺旋线的模态与真实的螺旋线的空间谐波密切相关。多丝螺旋传播许多模式，每个主空间谐波分量更接近适当的鞘螺旋模式作为电线的数量增加。每种模式都可以由一个横向平面中的导线的激励电流的特定相序来激励。实验验证的理论报告使用双线螺旋管。相速度和阻抗的测量，使用Kompfner的零方法和开始的主要向前和向后的组件分别向后波振荡。
The modes of the sheath helix are shown to be related closely to the space harmonics of real helices. Multiwire helices propagate many modes, the principal space-harmonic component of each approaching more closely the appropriate sheath helix mode as the number of wires is increased. Each mode can be excited by a certain phase sequence of exciting currents for the wires in one transverse plane. Experimental verification of the theory is reported using a bifilar helix tube. Phase velocities and impedances are measured, using Kompfner's null method and the start of backward-wave oscillations for the principal forward and backward components respectively.