Magnetic Field Tapering Approaches for Backward-Wave Oscillation Suppression in Helix Traveling-Wave Tubes

被引：11

作者：

Haegermann, Moritz ^{[1
]}

Birtel, Philip ^{[2
]}

Meyne, Sascha ^{[1
]}

Safi, Djamschid ^{[1
]}

Jacob, Arne F. ^{[1
]}

机构：

[1] Tech Univ Hamburg, Inst Hochfrequenztech, D-21073 Hamburg, Germany

[2] Thales Elect Syst GmbH, D-89073 Ulm, Germany

来源：

IEEE TRANSACTIONS ON ELECTRON DEVICES | 2018年 / 65卷 / 06期

关键词：

Backward-wave oscillation (BWO); BWO suppression; helix traveling-wave tube (TWT);

D O I：

10.1109/TED.2018.2810501

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：

Two magnetic field tapering concepts for the suppression of backward-wave oscillations in helix traveling-wave tubes (TWTs) are presented. Therefore, the beam-wave interaction in a homogeneous helix section is modified. Increasing the field strength reduces the beam diameter and consequently the beam-wave coupling, while an additional offset in the focusing field alters the synchronism between both. The theoretical background is introduced and results from a 1-D small-signal and a 3-D particle-in-cell code are presented and compared. Furthermore, a concept to apply the suppression techniques to a complete TWT is presented, and the influence on the amplifier output characteristics is analyzed.

引用

页码：2236 / 2242

页数：7

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