İç silindiri eksenel doğrultuda sonsuza uzayan dış ıletkeni ise yarı sonsuz eşseksenli dairesel dalga kılavuzundan tem modunun ışıması / TEM Wave Radiation from a Semi-infinite Coaxial Waveguide with an Infinitely Extended Inner Cylinder

Yıl 2011, Cilt: 1 Sayı: 1, 45 - 51, 01.06.2011

Alinur Büyükaksoy İsmail Tayyar

Öz

Bu çalışmada yarı sonsuz dış silindirin sonsuz ince ve mükemmel iletken, eksenel doğrultuda sonsuza uzanan iç silindirin de iki parçalı, yani bir yarısının mükemmel iletken diğer yarısının ise impedans sınır koşulu ile modellendiği durumda tem modunun dalga kılavuzunun ağzından ışınım wiener-hopf tekniği kullanılarak incelenmiştir. Dalga kılavuzunun iç ve dış silindirlerinin yarıçapları ile empedansın saçılan alana etkileri grafik olarak incelenmiştir.

ABSTRACT

An open ended coaxial waveguide formed by a perfectly conducting semi infinite outer cylinder and a center cylinder extending to infinity in the forward direction whose left part is perfectly conducting while the right part is characterized by a constant surface im- pedance is considered in the case of T EM wave excitation. By using the Fourier transform technique, the related boundary value probslem is formulated as a modified WienerHopf equation. The solution involve three set of infinitely many unknown expansion coefficients satisfying three infinite system of algebraic equations. The approximate solution is ob- tained numerically and some graphics are displayed for different values of the geometrical and physical parameters of the radiating system.

Anahtar Kelimeler

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Kaynakça

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• Bird, T.S.: T E11 mode excitation of flanged circular coaxial waveguides with an extended centre conductor', IEEE Trans. Antennas and Propagat., AP 35, pp.1358 - 1366, 1987
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• Mittra, R., and S.W. Lee, Analytical Techniques in the Theory of Guided Waves, McMillan, New York, 1971