A Ka-band TM02 mode relativistic backward wave oscillator with cascaded resonators
A Ka-band TM02 mode relativistic backward wave oscillator with cascaded resonators
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具有级联谐振器的Ka波段TM02模式相对论后向波振荡器
DOI:
10.1063/1.4902531
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发表时间:
2014-12
期刊:
影响因子:
--
通讯作者:
孙钧
中科院分区:
文献类型:
--
作者:
叶虎;史彦超;陈昌华;孙钧
By combining the Cerenkov-type generator with the cascaded resonators, this paper proposes a Ka-band relativistic backward wave oscillator operating under the guide magnetic field 1.0 T with high power handling capability and high conversion efficiency. It is found that TM02 can be selected as the operation mode in order to increase the power handling capability and provide sufficient coupling with the electron beam. In slow wave structure (SWS), ripples composed of semicircle on top of the rectangle enhance the wave-beam interaction and decrease the intensity of the electric field on the metallic surface. Taking advantage of the resonator cascades, the output power and the conversion efficiency are promoted greatly. The front cascaded resonators efficiently prevent the power generated in SWS from leaking into the diode region, and quicken the startup of the oscillation due to the premodulation of the beam. However, the post cascade slightly postpones the startup because of the further energy extraction from the electron beam. The numerical simulation shows that generation with power 514 MW and efficiency 41% is obtained under the diode voltage 520 kV and current 2.4 kA. And the microwave with the pure frequency spectrum of 29.35 GHz radiates in the pure TM01 mode.
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DOI:
10.1201/9781420012064
发表时间:
2007-02
期刊:
--
影响因子:
--
作者:
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通讯作者:
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影响因子:
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DOI:
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发表时间:
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期刊:
The Review of scientific instruments
影响因子:
--
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