Simulation Investigation of Backward Wave Oscillation of Millimeter-wave TWT

Lu  De-Jian; Wang Zi-Cheng; Liu  Pu-Kun

doi:10.3724/SP.J.1146.2007.00479

Volume 30 Issue 10

Jan. 2011

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Article Navigation > Journal of Electronics & Information Technology > 2008 > 30(10): 2520-2524

Lu De-Jian, Wang Zi-Cheng, Liu Pu-Kun. Simulation Investigation of Backward Wave Oscillation of Millimeter-wave TWT[J]. Journal of Electronics & Information Technology, 2008, 30(10): 2520-2524. doi: 10.3724/SP.J.1146.2007.00479

Citation:

Lu De-Jian, Wang Zi-Cheng, Liu Pu-Kun. Simulation Investigation of Backward Wave Oscillation of Millimeter-wave TWT[J]. Journal of Electronics & Information Technology, 2008, 30(10): 2520-2524. doi: 10.3724/SP.J.1146.2007.00479

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Simulation Investigation of Backward Wave Oscillation of Millimeter-wave TWT

doi: 10.3724/SP.J.1146.2007.00479

Lu De-Jian^{①② 王自成
,},
Wang Zi-Cheng,
Liu Pu-Kun

Received Date: 2007-03-30
Rev Recd Date: 2007-06-05
Publish Date: 2008-10-19

Abstract

Abstract

HFSS is used to simulate helical, contrawound helix and coupled-cavity Slow-Wave Structures(SWS), which work in Ka-band, to investigate the backward-wave oscillation of millimeter-wave TWT. The results show that, space harmonics, which axial space harmonic number and azimuth space harmonic number are unequal, are evident in helical SWS, the SWS runs a risk of backward oscillation near the mode. Relatively, contrawound helix shows excellent ability in restraining backward oscillation by improving interaction impedance and the normalized frequency which can work without backward oscillation. And coupled-cavity should avoid working around those frequencies where phase shifts per cavity are or 2.
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References(1)

References

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