Browsing by Author "Kara, A"

Now showing 1 - 2 of 2

Citation - WoS: 4
Citation - Scopus: 5
Roof Shape Modelling for Multiple Diffraction Loss in Cellular Mobile Communication Systems
(Taylor & Francis Ltd, 2002) Kara, A; Yazgan, E
The effects of roof shapes on multiple diffraction loss in cellular mobile communication systems are investigated. Building roofs are modelled as finitely conducting wedges with different, included angles (peaked roofs). Multiple diffraction loss, a measure of diffraction loss due to multiple building geometry, is computed by using the method of UTD (uniform theory of diffraction) for 90degrees and 120degrees wedges over the communication paths oblique to building blocks. The results, compared with the absorbing edge model, 0degrees wedge, show that multiple diffraction loss decreases with increasing wedge angle.
Citation - WoS: 2
Citation - Scopus: 5
Scattering of Plane Waves at the Junction of Two Corrugated Half-Planes
(Taylor & Francis inc, 2005) Serbest, AH; Kara, A; Lueneburg, E
In this paper, the boundary conditions given by Weinstein ( 1969) are employed to simulate two corrugated half-planes with the same slot height but different slot width. The scattering mechanism at the junction of these half-planes is investigated via the Fourier transform technique, which leads to two coupled Wiener - Hopf equations. The solution of the Wiener - Hopf system is obtained by the Daniele - Khrapkov method and some numerical results are presented about the analysis of the scattered field.