Characteristics of Arbitrarily-Shaped Helical Groove Slow-Wave Structure Loaded with a Concentric Dielectric-Rod |
| |
Authors: | Yu-Bin Gong Yan-Yu Wei Hong-Tao Liu |
| |
Affiliation: | (1) National Key Laboratory of High Power Vacuum Electronics, University of Electronic Science and Technology of China, Chengdu, 610054, China |
| |
Abstract: | The dielectric-rod is loaded on the central axis of the arbitrarily-shaped helical groove slow-wave structure. Meanwhile,
the profile of the groove is replaced by a series of continuous rectangular steps. The unified dispersion equation of the
arbitrarily-shaped helical groove waveguide loaded with a concentric dielectric-rod is obtained by means of a combination
of filed-matching method and admittance-matching technique. Then, the effect of the change of groove shape and the dielectric-rod
parameters on the dispersion and coupling impedance is approached by theory calculation. The results show that: loaded with
dielectric-rod, the bandwidth of the helical groove traveling wave tube (TWT) is effectively broadened, but the coupling impedance
is reduced. Among the five different groove shapes, the triangle-type groove has the widest bandwidth but the smallest coupling
impedance, and the swallow-tailed-type groove has the narrowest bandwidth but the largest coupling impedance. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|