Dispersion Characteristics of a Rectangular Helix Slow-Wave Structure

被引：37

作者：

Fu, Chengfang ^{[1
]}

Wei, Yanyu ^{[1
]}

Wang, Wenxiang ^{[1
]}

Gong, Yubin ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Phys Elect, Natl Key Lab High Power Vacuum Elect, Chengdu 610054, Peoples R China

来源：

IEEE TRANSACTIONS ON ELECTRON DEVICES | 2008年 / 55卷 / 12期

基金：

中国国家自然科学基金;

关键词：

Coupling impedance; dispersion properties; field-matching method; rectangular helix;

D O I：

10.1109/TED.2008.2006539

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A special type of helical slow-wave structure encompassing a rectangular geometry is investigated in this paper, and the slow-wave characteristics are studied taking into account the anisotropically conducting helix. By using the electromagnetic integral equations at the boundaries, the dispersion equation and the interaction impedance of transverse antisymmetric modes in this structure are derived. Moreover, the obtained complex dispersion equation is numerically calculated. The calculation results by our theory agree well with the results obtained by the 3-D EM simulation software HFSS. The numerical results reveal that the phase velocity decreases and interaction impedance increases at higher frequencies by flattening (increasing the aspect ratio of) the rectangular helix structure. In addition, a comparison of slow-wave characteristics of this structure with a conventional round helix is made.

引用

页码：3582 / 3589

页数：8

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