Direct Time Domain Analysis of an UWB Pulse Distortion by Convex Objects With the Slope Diffraction Included

Abstract

We consider time domain (TD) modelling of diffraction of a signal, caused by 2D conducting convex objects for soft polarization case. Two models of the amplitude term of the time domain convex obstacle diffraction coefficient are proposed and compared. One model is derived using an analytical-numerical method and the other is obtained in a purely analytical way. Both methods use uniform geometrical theory of diffraction (UTD) formulated in the frequency domain (FD). The models are used to examine an ultrawideband (UWB) pulse distortion. The accuracy and calculation complexity of both models are compared. The slope term of the convex obstacle diffraction coefficient is also considered, for the case when slope diffraction is not negligible. The UWB pulse distortion caused by overall convex obstacle diffraction is also analysed.