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A Uniform Asymptotic Solution for Transmitted Waves through a Plane Dielectric Interface from a Denser to a Rarer Mediums by Using Parabolic Cylinder Functions

  • Quang, Dinh Trong (Dept. of Communication Engineering, National Defense Academy) ;
  • Goto, Keiji (Dept. of Communication Engineering, National Defense Academy) ;
  • Kawano, Toru (Dept. of Communication Engineering, National Defense Academy) ;
  • Ishihara, Toyohiko (Dept. of Communication Engineering, National Defense Academy)
  • Received : 2011.08.25
  • Accepted : 2012.02.02
  • Published : 2012.03.31

Abstract

When the cylindrical wave is incident on a plane dielectric interface from a denser medium to a rarer one, the asymptotic solution for the transmitted wave in the near region is different from the one in the far region. In this paper, we have derived a novel uniform asymptotic solution represented by using the parabolic cylinder function for the transmitted and scattered waves observed in the rarer medium when the cylindrical wave is incident on the plane dielectric interface from the denser medium. The validity of the uniform asymptotic solution has been confirmed by comparing with the reference solution calculated numerically. It has been clarified that the transition wave plays an important role to connect smoothly the asymptotic solution in the near region to the one in the far region through the transition region. We have shown the very interesting phenomenon that the lateral wave type transmitted wave is observed in the far and shallow region.

Keywords

Parabolic Cylinder Function;Plane Dielectric Interface;Transmitted Wave;Uniform Asymptotic Solution

Acknowledgement

Supported by : Japan Society for the Promotion of Science

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