Wave Propagation in Dielectric Slab Waveguide with two Different Cladding Materials.

Abstract

In this study the Ku ــband microwave with a frequencies of (12- 18) GHz propagation in dielectric materials InGaAsP( refractive index n1=3.39) with two different claddings, air(n2=1) and polyacrylate(n2=1.5) , was investigated. Using the cladding polyacrylate gives better results.The graphical and numerical results of the behavior of electromagnetic wave propagation along Z - direction in dielectric slab waveguide in the two cases of cladding were investigated with the aid of MATLAB program. The graphical and numerical results coincide. The modes of propagation have been analyzed and all parameters have been given. The values of different parameters as cutoff wave number, cutoff frequency, cutoff thickness , propagation constant, and transmission of electromagnetic wave have been calculated. The transmission of the microwave depends on the slab thickness and the frequencies applied and it has been found to varied from 75% to 100%. The reflection amplitude inside the slab is not effected when the angle of the incident wave is less than the critical angle, while it increased rapidly as the angle increased higher than the critical angle.