中国物理B ›› 2006, Vol. 15 ›› Issue (9): 2114-2119.doi: 10.1088/1009-1963/15/9/035
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
刘洪涛, 魏彦玉, 宫玉彬, 岳玲娜, 王文祥
Liu Hong-Tao(刘洪涛)†, Wei Yan-Yu(魏彦玉)‡, Gong Yu-Bin(宫玉彬), Yue Ling-Na(岳玲娜), and Wang Wen-Xiang(王文祥)
摘要: This paper presents a theory on accurately analysing the dispersion relation and the interaction impedance of electromagnetic waves propagating through a helical groove waveguide with arbitrary groove shape, in which the complex groove profile is synthesized by a series of rectangular steps. By introducing the influence of high-order evanescent modes on the connection of any two neighbouring steps by an equivalent susceptance under a modified admittance matching condition, the assumption of the neglecting discontinuity capacitance in previously published analysis is avoided, and the accurate dispersion equation is obtained by means of a combination of field-matching method and admittance-matching technique. The validity of this theory is proved by comparison between the measurements and the numerical calculations for two kinds of helical groove waveguides with different groove shapes.
中图分类号: (Persistent currents)