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Microwave Breakdown and High-Power Handling Capability of Circular Waveguide Cavity Filter  

Lee, Sun-Ik (한국항공우주연구원 위성연구본부 위성기술연구단 위성전자팀)
Kim, Joong-Pyo (한국항공우주연구원 위성연구본부 위성기술연구단 위성전자팀)
Lim, Won-Gyu (한국항공우주연구원 위성연구본부 위성기술연구단 위성전자팀)
Kim, Sang-Goo (한국항공우주연구원 위성연구본부 위성기술연구단 위성전자팀)
Jang, Jin-Baek (한국항공우주연구원 위성연구본부 위성기술연구단 위성전자팀)
Publication Information
Journal of Satellite, Information and Communications / v.12, no.3, 2017 , pp. 80-85 More about this Journal
Abstract
In this paper, a mircrowave breakdown of X-band circular waveguide cavity filter, which occurred during ground test, was introduced, and electro-magnetic field simulation results to identify a root cause, and the analysis of possibility of its occurrence on orbit operation were presented. Filter modeling for simulation was conducted with a commercial tool (FEST3D), and electric fields inside the filter were monitored at the input of 1 W continuous wave. In our observation, strong electric field intensities were monitored on the tuning screws especially at the input of band-edge frequencies. The threshold power levels for the breakdown were also estimated and compared with the input power levels actually injected to the filter. From this estimation, we could figure out that the power exceeding the breakdown threshold was injected to the filter so that strong electric fields were generated and temperature increased high, and this became a root cause of the electrical short. Our further analysis showed that this kind of microwave breakdown is not likely to occur on orbit operation, and multipactor is expected not to occur at the input of band-edge frequencies. As a measure to prevent the microwave breakdown, we suggested to avoid the injection of band-edge frequencies and inject lower power levels to the filter.
Keywords
circular waveguide cavity filter; microwave breakdown; high power handling capability; mode chart; multipactor;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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