Effect of attenuator on BWO start oscillation condition in a helix millimeter wave TWT under magnetic focusing

被引：3

作者：

Duan, ZY ^{[1
]}

Gong, YB ^{[1
]}

Wang, WX ^{[1
]}

Gong, HR ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Phys Elect, Chengdu 610054, Peoples R China

来源：

INTERNATIONAL JOURNAL OF INFRARED AND MILLIMETER WAVES | 2004年 / 25卷 / 08期

关键词：

attenuator; BWO; magnetic focusing system; millimeter wave TWT; start oscillation condition;

D O I：

10.1023/B:IJIM.0000042750.93222.02

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：

In a practical helix millimeter wave traveling-wave tube (TWT), there are always magnetic focusing system for constraining the electron beam as it passes through the interaction region and attenuator for suppressing the oscillations, including backward-wave oscillation (BWO) and improving the output power. In view of the attenuator and magnetic focusing system, a 2D linear theory is employed to analyze BWO start oscillation condition. Numerical results show that the start oscillation length of the millimeter wave TWT decreases when the start position of the attenuator is close to the input section of the slow wave structure (SWS), and that it increases with the decrease of the attenuation length or the increase of the attenuation quantity. Therefore, in order to predict the BWO accurately, we should take into the attenuator and magnetic focusing system account.

引用

页码：1175 / 1182

页数：8

共 14 条

[1] Stability of traveling-wave amplifiers with reflections
Antonsen, TM
Safier, P
Chernin, DP
Levush, B
[J]. IEEE TRANSACTIONS ON PLASMA SCIENCE, 2002, 30 (03) : 1089 - 1107
[2] Two-dimensional small-signal analysis of backward-wave oscillation in a helix traveling-wave tube under Brillouin-flow, periodic permanent magnetic focusing
Belyavskiy, ED
Goncharov, IA
Martynyuk, AE
Svirid, VA
Khotiaintsev, SN
[J]. IEEE TRANSACTIONS ON ELECTRON DEVICES, 2001, 48 (08) : 1727 - 1736
[3] STARTING CONDITIONS FOR BACKWARD-WAVE OSCILLATORS WITH LARGE LOSS AND LARGE SPACE CHARGE
GROW, RW
GUNDERSON, DR
[J]. IEEE TRANSACTIONS ON ELECTRON DEVICES, 1970, ED17 (12) : 1032 - +
[4] HADDAD GI, 1964, IEEE T ELECT DEV JAN, P31
[5] HADDAD GT, 1963, IEEE T ELECTRON DEV, P389
[6] ANALYSIS OF THE BACKWARD-WAVE TRAVELING-WAVE TUBE
HEFFNER, H
[J]. PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1954, 42 (06): : 930 - 937
[7] BACKWARD-WAVE OSCILLATORS
JOHNSON, HR
[J]. PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1955, 43 (06): : 684 - 697
[8] LIU SG, 1985, INTRO MICROWAVE ELEC
[9] 2-WAVE THEORY OF TRAVELING-WAVE TUBES AND BACKWARD-WAVE OSCILLATIONS
NILSSON, BO
HAGSTROM, CE
[J]. IEEE TRANSACTIONS ON ELECTRON DEVICES, 1975, 22 (10) : 869 - 880
[10] Rowe J. E., 1965, NONLINEAR ELECT WAVE

← 1 2 →