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Underwater E-plane Attenuation Model of Omnidirectional Antenna Using Half Power Beam Width (HPBW)

반전력빔폭을 이용한 전방향성 안테나의 수중 환경 수직 평면 감쇠 모델

  • Kwak, Kyungmin (Department of Mechanical Engineering, Seoul National University of Science and Technology) ;
  • Park, Daegil (Department of Mechanical Engineering, Pohang University of Science and Technology) ;
  • Kim, Younghyeon (Department of Mechanical Engineering, Seoul National University of Science and Technology) ;
  • Chung, Wan Kyun (Department of Mechanical Engineering, Pohang University of Science and Technology) ;
  • Kim, Jinhyun (Department of Mechanical Engineering, Seoul National University of Science and Technology)
  • 곽경민 (서울과학기술대학교 기계공학과) ;
  • 박대길 (포항공과대학교 기계공학과) ;
  • 김영현 (서울과학기술대학교 기계공학과) ;
  • 정완균 (포항공과대학교 기계공학과) ;
  • 김진현 (서울과학기술대학교 기계공학과)
  • Received : 2015.08.16
  • Accepted : 2015.10.06
  • Published : 2015.11.01

Abstract

In this paper, we use the characteristics of electromagnetic waves underwater attenuation for estimating linear distance between a transmitting node and receiving node, and research underwater vertical plane attenuation model for constructing the underwater localization system. The underwater localization of 2 dimensional with the plane attenuation model in the horizontal plane (H-plane) was proposed previous research. But for the 3 dimensional underwater localization, the additional vertical plane (E-plane) model should be considered. Because the horizontal plane of omnidirectional antenna has the same attenuation tendency in x-y plane according to the distance, whereas in vertical plane shows an irregular pattern in x-z plane. For that reason, in the vertical plane environment, the attenuation should be changed by the position and inclination. Hence, in this paper the distance and angle between transmitting and receiving node are defined using spherical coordinate system and derive an antenna gain pattern using half power beam width (HPBW). The HPBW is called a term which defines antenna's performance between isotropic and other antennas. This paper derives omnidirectional antenna's maximum gain and attenuation pattern model and define vertical plane's gain pattern model using HPBW. Finally, experimental verifications for the proposed underwater vertical plane's attenuation model was executed.

Acknowledgement

Supported by : 산업통상자원부

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