• Title/Summary/Keyword: Slotted Waveguide Feeder

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Design and Realization of a Slotted Waveguide Feeder for Improving Electric Field Uniformity in Multi-Mode Cavity (다중 모드 공동기 내의 전계 분포 균일성 향상을 위한 슬롯 도파관 급전기 설계 및 제작)

  • Lee, Jung-Hwan;Choi, Sung-Su;Kim, Seung-Jae;Park, Dong-Chul
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.18 no.5 s.120
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    • pp.496-502
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    • 2007
  • In this paper, a slotted waveguide feeder for the electric field uniformity in multi-mode cavity is designed and fabricated. In case of the conventional feeder, a mode stirrer or a turntable is used for improving electric field uniformity in the multi-mode cavity. The proposed feeder has four slots, which have uniform radiation characteristic, on broad wall and shorted terminations at both ends. The electric field uniformity is simulated by CST's MWS(Microwave Studio) for the conventional and proposed feeders, respectively. The fabricated feeder shows the return loss of less than -20 dB at 2.45 GHz. To verify the validity of our proposal, the temperature distribution of the water samples in the multi- mode cavity is observed after a few minutes' heating. The proposed feeder is confirmed to have much better field uniformity in the multi-mode cavity than the conventional feeder.