Modeling and Calculation of Coupling Between Antenna on Aircraft by Calculation of Geodesic

Document Type : Original Article

Abstract

Antennas  that  are  installed  on  the  aircraft,  must  have  minimum  mutual  coupling  so  that  the  function  of  the
transmitter  and  receiver    will  not  be  interfered.  For  coupling  calculation,  we  must  obtain  wave  pass  from
transmitter antenna  to receiver  antenna.  In case  that  antennas are  LOS, this  pass  is a  direct  pass. But  in  case
that  antennas  are  NLOS,  a  kind  of  surface  wave  causes  mutual  coupling.  The  best  way  for  calculation  of
coupling is through obtaining geodesics. Then by calculation of surface loss, we can  get the amount of coupling.
if  the  aircraft  is  modeled  with  a  cylinder,  calculation  of  geodesics  is  easy  and  practical.  the  advantage  of  this
approximation  is  that  we  can  extend  it  for  any  aircrafts  with  cylindrical  fuselages.  in  this  approximation,  the
effect  of  obstacles  and  diffraction  in  edges  is  not  considered.  in  this  paper,  results  of  mutual  coupling
calculation,  results  of  simulation    as  well  as  the  measured  data  is  compared  in  approximated  model  of  the
aircraft. It will finally be shown that in the worst case, calculation results are not greater than 15db. 

Keywords

References

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History

  • Receive Date: 25 August 2016
  • Revise Date: 06 March 2019
  • Accept Date: 19 September 2018
  • Publish Date: 23 July 2015

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