Document Type : Research Paper
Authors
University Of Anbar – College Of Science.
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.
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- B. N. Perry ,P. Rabinowitz and M. Newstein , "Wave propagation in media with focused gain", Physical. Review. A 27, pp.1989– 2002 ,1983.
- D. R. Lynch and K. D. Paulsen, "Origin of Vector Parasites in Numerical Maxwell Solutions", IEEE Trans. Microwave Theory and Tech., Vol. MTT-39, pp. 383-394,March 1991.
- E. T. Thostenson, and T. W. Chou, "Microwave processing: Fundamentals and applications", Composite A, Vol. 30,pp. 1055–1071, 1999.
- T. K. Sakar, A. Kamal, A. Ercument, M. Moshe and L. Robert , " Computation of the propagation characteristics of TE and TM modes in arbitrary shaped hollow waveguides utilizing the conjugate gradient method", Journal of Electromagnetic Waves Applied, Vol.3, No.2,pp.143-165, 1989.
- M. Stralen, K.F. Haak and H. Blok ''On the classification of discrete modes in lossy planar waveguides: the mode analysis revisited '' Optical and quantum electronics, Vol.29,PP.243-262,1997.
- Latef, M. Ali, characteristics of polymer composite materials waveguide, Ph. D Thesis, University of Technology, Iraq, 2009.
- Mahdi, H. Suhail, NabeilI. Fawaz, Latef, Ali, "Dielectric waveguide for composite materials", Iraqi National Scientific Conference on Physics, April, 2010.
- Young Tae Byun, Kyung Hyun Park, Sun Ho Kim, Sang Sam Choi, and Tong Kun Lim, "Single-mode GaAs/AlGaAs waveguides with a low propagation loss", Applied Optics, Vol.35,No. 6, pp.928-933,1996.
- L.B. Soldano and E.C. M. penning," Optical multi-mode interference devices based on self-imaging: Principle and applications," IEEE Journal Lightwave Technology, Vol.13,pp.615-627,1995.
- A. P. Hibbins, J. L. Matthew, I. R. Hooper, and J. Roy Sambles ,"Waveguide Arrays as Plasmonic Metamaterials: Transmission below Cutoff ", Physical Review Letters ,Vol.24, pp. 1-3,2006.
S. Fan, J.N. Winn, A. Devenyi, J. C. Chen, R. D. Meade and J.D. Joannopoulos,''Guided and defect modes in periodic dielectric waveguides'', Journal of the Optical Society of America Vol.12,No.7, pp. 1267 - 1272, July 1995.
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