The Small and Handy Radar Transponder

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  • 小型レーダトランスポンダ
  • コガタ レーダ トランスポンダ

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The transponder is not used so efficiently at sea as in the air. IMCO recomends the use of transponder at sea and WMARC (The World Maritime Administrative Radio Conference) adopted the provisions relating to the development of fix frequency radar beacon in the maritime radio navigation service in two frequency bands. From these point of view, the author tried to produce a small and handy radar transponder using the oscillator that the author has presented before the paper "Gunn Diode Oscillator as Life Saving Apparatus". This transponder of small size and less power consumption will be expected to be used as the radar beacon, the secondary radar in the vessel traffic control, the collision avoidance of ships, the radar mark of fishing tools and etc. The fabrication of the equipment, frequency sweep, position error and the problem of fruit are discussed in this paper. And the last, the results of experiment at sea are shown.

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