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Report No.

Research and development of wide band polarizer for high power millimeter wave

Sai, Takuma*; Matsubara, Fumiaki*; Ishida, Yoshitaka*; Saigusa, Mikio*; Kobayashi, Takayuki; Moriyama, Shinichi

A wideband polarizer were developed for an electron cyclotron current driving system in JT-60SA. The wideband polarizer consists of a twister and a circular polarizers. The polarization properties of the twister was confirmed in cold tests. A high power test of the twister was carried out at an input power of 0.25 MW, 3 s at a frequency of 110 GHz. A new polarizer was designed for next high power tests. The circular polarizer of the different groove period was simulated by numerical simulations using a FDTD method.



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