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논문 기본 정보

자료유형
학술저널
저자정보
Se-Hoon Kim (Hanyang University) Chang-Jin Lee (Hanyang University) Wan-Il Kim (Hanyang University) Kwang-Cheol Ko (Hanyang University)
저널정보
한국전자파학회JEES Journal of Electromagnetic Engineering And Science Journal of Electromagnetic Engineering And Science Vol.22 No.3
발행연도
2022.5
수록면
265 - 271 (7page)

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초록· 키워드

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A cathode with an open-ended coaxial structure is experimentally investigated using an axial virtual cathode oscillator (vircator). To enhance the microwave power output, an open-ended coaxial cathode is installed in the axial vircator. The proposed cathode is designed based on the reciprocating frequency of the vircator. The operation features of an axial vircator with a solid cathode, an annular cathode, and an open-ended coaxial cathode are comparatively analyzed through simulations and experiments. Three cathodes are machined using graphite. A stainless steel mesh with a transparency of 70% is used as an anode. The anode-to-cathode gap is fixed to 6 mm. The vircator is driven using a 10-stage PFN-Marx generator with a characteristic impedance of 31 Ω. The PFN-Marx generator applies -150 kV voltage pulses with a 170–200 ns pulse width into the vircator. The microwave power from the solid and annular cathodes is 11.22 MW and 11.27 MW, respectively. The proposed cathode generates a microwave with a power of 12.65 MW while enhancing the microwave power by 13% compared with the solid and annular cathodes. The proposed cathode shows a frequency shift to 3.4 GHz, which is a much lower frequency than that of the solid cathode at 6.34 GHz.

목차

Abstract
I. INTRODUCTION
II. SYSTEM DESCRIPTION
III. DESIGN OF OPEN-ENDED COAXIAL CATHODE
IV. EXPERIMENTAL RESULTS AND ANALYSIS
V. CONCLUSION
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