Modal Transition and Reduction in a Lossy Dielectric-Coated Waveguide for Gyrotron-Traveling-Wave Tube Amplifier Applications
Modal Transition and Reduction in a Lossy Dielectric-Coated Waveguide for Gyrotron-Traveling-Wave Tube Amplifier Applications
复制标题
用于回旋管行波管放大器应用的有损电介质涂层波导中的模态转变和减少
DOI：
10.1109/ted.2009.2015422
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发表时间：
2009-03
影响因子：
3.1
通讯作者：
中科院分区：
文献类型：
--
作者：
A metal cylindrical waveguide coated with an inside layer of lossy dielectric which affects the propagation characteristics of a guided electromagnetic mode is investigated for gyrotron-traveling-wave tube (gyro-TWT) amplifier applications. This paper reveals a series of novel phenomena. The dispersion curve of a higher order mode has a turning point during its evolvement from the fast wave region to the slow wave region. An electromagnetic mode in the lossy dielectric-coated waveguide exhibits a transverse partial-standing-wave distribution. The dielectric loss induces modal transition which results in the dispersion curves of a pair of nearby modes crossing each other and interchanging mode structures. Modal reduction caused by strong dielectric loss merges a pair of nearby modes into one. In this one merged mode, the dielectric-coated waveguide is equivalent to a conventional cylindrical waveguide with imperfect conducting wall. This improved understanding of lossy dielectric-coated metal cylindrical waveguide is of value and usefulness for application toward gyro-TWTs capable of high-power and wide bandwidth.
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DOI：
10.1109/9780470546710
发表时间：
1961-06
期刊：
--
影响因子：
--
作者：
R. Harrington
通讯作者：
R. Harrington
影响因子：
2.2
作者：
B. Levush;M. Blank;J. Calame;B. Danly;K. Nguyen;D. Pershing;S. Cooke;P. Latham;J. Petillo;T. Antonsen
通讯作者：
B. Levush;M. Blank;J. Calame;B. Danly;K. Nguyen;D. Pershing;S. Cooke;P. Latham;J. Petillo;T. Antonsen
影响因子：
1.5
作者：
Garven, M;Calame, JP;Wood, FN
通讯作者：
Wood, FN
影响因子：
56.9
作者：
Ibanescu, M;Fink, Y;Joannopoulos, JD
通讯作者：
Joannopoulos, JD
影响因子：
3.1
作者：
J. Calame;M. Garven;B. Danly;B. Levush;K. Nguyen
通讯作者：
J. Calame;M. Garven;B. Danly;B. Levush;K. Nguyen