제어로봇시스템학회:학술대회논문집

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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The Analysis of the Airplane Flutter on Low Band Television Broadcasting Signal

  • Wonggeeratikun, A. (Faculty of Engineering and Research Center for Communications and Information Technology (ReCCIT), KMITL King Mongkut’s Institute of Technology Ladkrabang (KMITL), Bangkok Entertainment Company Limited) ;
  • Noppanakeepong, S. (Faculty of Engineering and Research Center for Communications and Information Technology (ReCCIT), KMITL King Mongkut’s Institute of Technology Ladkrabang (KMITL)) ;
  • Leelaruji, N. (Faculty of Engineering and Research Center for Communications and Information Technology (ReCCIT), KMITL King Mongkut’s Institute of Technology Ladkrabang (KMITL)) ;
  • Hemmakorn, N. (Faculty of Engineering and Research Center for Communications and Information Technology (ReCCIT), KMITL King Mongkut’s Institute of Technology Ladkrabang (KMITL)) ;
  • Moriya, Y. (Faculty of Engineering and Research Center for Communications and Information Technology (ReCCIT), KMITL King Mongkut’s Institute of Technology Ladkrabang (KMITL))
  • Published : 2003.10.22
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Abstract

The paper studies effect of quasi-periodic or airplane flutter phenomenon on television broadcasting signal. Airplane flutter is a very important problem. It causes the receiving antenna to receive both direct signal by the Tx (Transmitter antenna) and reflected signal scattered by the airplane with phase delay. The sum of two signals results in fading, sometime collapse and distortion of picture on TV screen. We performed measurement and modeling this phenomenon on TV signal when the airplane flew across and range Tx and Rx (Receiver antenna). The frequency 60.75MHz (Aural frequency of CH3) is used under tests. A single scatter multipath model is introduced. It is used to duplicate some of the measured data and show the dependence of power variation on the airplane fluttering. The fluctuation of the airplane flutter phenomenon was calculated to be around 2-4dB. The Yaki antenna is used for improving airplane flutter problem because it can make high gain and high directivity.

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