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Conceptual Design of Dual Baseline-Frequency Fast Directional Switch using Square Corrugated Waveguide Splitter/Combiner

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Abstract

A FAst DIrectional Switch(FADIS) performance based on steep slope in a diplexer function was considered for dual-frequency (dual-f) applications to switch the transmission line with small frequency control. A diplexer of FADIS using a Square Corrugated Waveguide (SCW) splitter was designed as one of the most attractive candidates for the dual-f operation. The splitter performance was a key issue for the dual-f operation, and extended operation regions in splitter operations have been considered and surveyed using mode contents analysis based on matching coefficient evaluation. Some operational branches with high matching coefficients (>0.9) were found, and a new operating parameters were proposed for the dual-f operation in the JT-60SA Electron Cyclotron Hearing and Current Drive (ECHCD) system. Radiation pattern distributions from the SCW splitter were defined very well with no serious side lobes in the dual-f operation. In double loop ring resonator system, the diplexer frequency response was sufficiently steep to switch the outputs of the JT-60SA dual-f gyrotron.

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Acknowledgements

This work was performed with the support and under the auspices of the JAEA Collaboration Research Program. This work was also supported in part by the International Collaborative Research Program of the Research Institute for Applied Mechanics, Kyushu University.

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Authors and Affiliations

  1. Research Institute for Applied Mechanics, Kyushu University, Kasuga, 816-8580, Japan

    H. Idei

  2. Japan Atomic Energy Agency, Naka, 311-0193, Japan

    T. Kobayashi, S. Moriyama & A. Isayama

  3. Furukawa C & B Co., Ltd., Yamato, 242-0018, Japan

    M. Sakaguchi

  4. Institute of Interfacial Process Engineering and Plasma Technology, Pfaffenwaldring 31, D-70569, Stuttgart, Germany

    W. Kasparek

Authors
  1. H. Idei
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  2. T. Kobayashi
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  3. S. Moriyama
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  4. A. Isayama
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  5. M. Sakaguchi
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  6. W. Kasparek
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Correspondence to H. Idei.

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Idei, H., Kobayashi, T., Moriyama, S. et al. Conceptual Design of Dual Baseline-Frequency Fast Directional Switch using Square Corrugated Waveguide Splitter/Combiner. J Infrared Milli Terahz Waves 36, 662–674 (2015). https://doi.org/10.1007/s10762-014-0138-0

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  • DOI: https://doi.org/10.1007/s10762-014-0138-0

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