A mode-selective circuit for TE01 gyrotron backward-wave oscillator with wide-tuning range

Author

Chen, Nai-Ching ; Yu, Ching-Fang ; Yuan, Ching-Pin ; Chang, Tsun-Hsu

Author_Institution

Dept. of Phys., Nat. Tsing Hua Univ., Hsinchu, Taiwan

fYear

2009

fDate

21-25 Sept. 2009

Firstpage

1

Lastpage

2

Abstract

This study proposes a mode-selective circuit to suppress the competing modes in a TE₀₁ gyrotron backward-wave oscillator (gyro-BWO). The circuit, also functioning as an interaction structure, comprises of several transverse slices. It eliminates the restrictions of the mode-competitions and allows a longer interaction structure to optimize interacting efficiency. Mode-selective effect will be analyzed. Experimental results indicate that the Ka-band TE₀₁ fundamental harmonic gyro-BWO is capable of continuous tuning from 31.4 GHz to 36.4 GHz with a peak efficiency of 23.7% corresponding to 100 kW at I_b = 4.5 A and V_b = 93.6 kV.

Keywords

backward wave oscillators; gyrotrons; nonlinear network analysis; Ka-band; TE₀₁ gyrotron backward-wave oscillator; current 4.5 A; frequency 31.4 GHz to 36.4 GHz; gyro-BWO; interacting efficiency; interaction structure; mode-competitions; mode-selective circuit; power 100 kW; voltage 93.6 kV; wide-tuning range; Circuits; Cutoff frequency; Gyrotrons; Magnetic analysis; Magnetic fields; Optical reflection; Oscillators; Resonant frequency; Tellurium; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz Waves, 2009. IRMMW-THz 2009. 34th International Conference on

Conference_Location

Busan

Print_ISBN

978-1-4244-5416-7

Electronic_ISBN

978-1-4244-5417-4

Type

conf

DOI

10.1109/ICIMW.2009.5324714

Filename

5324714