• Title/Summary/Keyword: Counter-measure

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군 통신에서의 재밍(Jamming) 기술

  • Kim, Jin-Hyeong;Kim, Eun-Cheol;Lee, Jong-Myeong
    • Information and Communications Magazine
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    • v.26 no.3
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    • pp.32-40
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    • 2009
  • 최근 전자전 (EW : Electronic Warfare)은 현대전의 핵심으로 자리매김하고 있다. 전자전에서 재밍 (Jamming)은 적군의 통신을 교란시키는 전자공격 (EA : Electronic Attack)을 의미하는 것으로 재밍 전술은공격 대상에 따라서 여러 가지로 나눌 수 있다. 본고에서는 군통신에서 사용되는 전자방해책 (ECM : Electronic Counter Measure)인 재밍 기술을 소개하고, 재밍 신호에 대한 대책으로 재밍 신호를 효과적으로 검출하고 제거할 수 있는 전자방해방어책인 (ECCM : Electronic Counter Counter Measure) 항재밍 (Anti-Jamming) 방안도 함께 분석 소개하고자 한다.

The Analysis and Counter-Measure for Signal Distortion of the Searching Radar Due to Ship Structures (함정 구조물에 의한 탐색 레이다 신호 왜곡 현상 분석 및 대책)

  • Song, Ki-Hwan
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.20 no.7
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    • pp.625-630
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    • 2009
  • In this paper, we introduce the analysis and counter-measure of signal distortion of search radar equipped on the ship. Using ShipEDF program, the search radar's main antenna and ship structures are modeled in the view of electromagnetism. Ray tracing method is used for analysis of the search radar's radiation patterns in free space and ship condition. From analyzed radiation patterns, we can conclude that the search radar's signal distortion is due to radiation pattern distortion. We also analyze the surface current distribution of the mast to propose the counter-measure to reduce electro-magnetic field reflection of mast.

The Study on Treeing under the Temperature Variation in Low Density Polyethylene Mixed with Dodecyl Alcohol (Dodecyl Alcohol이 첨가된 P.E에서 온도변화에 따른 Treeing에 관한 연구)

  • Lee, Chang-Hee;Lee, Kye-An;Kim, Sang-Jun;Kim, Jung-Soo
    • Proceedings of the KIEE Conference
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    • 1989.11a
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    • pp.75-78
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    • 1989
  • Insulation of P.E insulated cable under the field of high-voltage will be breakdown ultimately due to the degradation process called 'Treeing' which is generated in the insulation, so long as any counter-measure suppressing or eliminating it could not be provided. In this paper as a counter-measure Dodecyl Alcohol is mixed with P.E and Treeing under the temperature variation has been observed. Results show that the larger weight ratio of Dodecyl Alcohol is stronger the effect of suppressing Tree ing in the range from room temperature to 40$^{\circ}C$ and generated Treeing has been soon eliminated and it never again generated.

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