Analysis of the Characteristics of a Coaxial Gyrotron Cavity With a Tilted Inner Rod

Author

Liu, Diwei ; Yan, Yang ; Liu, Shenggang

Author_Institution

Terahertz Sci. & Technol. Res. Center, Univ. of Electron. Sci. & Technol. of China, Chengdu, China

Volume

59

Issue

3

fYear

2012

fDate

3/1/2012 12:00:00 AM

Firstpage

841

Lastpage

845

Abstract

The effects of the tilted inner rod of a coaxial gyrotron cavity on the resonant frequency, the diffractive quality factor, and the longitudinal field distribution for transverse electric (TE) modes are investigated. As a practical application, a numerical analysis is given to TE₆₂ mode in the 330-GHz wideband continuous frequency tunable coaxial gyrotron proposed by O. Dumbrajs´ group. Results show that a small tilt angle of the inner rod will cause a noticeable change in the resonant frequency, the diffractive quality factor, and the longitudinal field distribution for TE modes in a coaxial gyrotron cavity due to the mode coupling. The resonant frequency and the diffractive quality factor increase with increasing tilt angle of the inner rod; if the tilt angle θ is 0.4^°, the resonant frequency shift will be about 1.5 GHz.

Keywords

coaxial waveguides; gyrotrons; coaxial gyrotron cavity; diffractive quality factor; frequency 330 GHz; longitudinal field distribution; mode coupling; resonant frequency; tilted inner rod; transverse electric modes; wideband continuous frequency tunable; Cavity resonators; Educational institutions; Gyrotrons; Manganese; Plasmas; Q factor; Resonant frequency; Coaxial gyrotron cavity with a tilted inner rod; diffractive quality factor; longitudinal field distribution; resonant frequency;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/TED.2011.2177095

Filename

6138301