FVTD ANALYSIS OF 2-DIMENSIONAL BENDED WAVE-GUIDE AND HORN ANTENNA

This paper is concerned with a point-oriented finite volume time domai n (FVTD) method in the Cartesian coordinate system and its application to the analysis of electromagnetic wave propagation in a bended waveg uide as well as radiation from and receiving by a horn antenna with a flange of arbitrary angle. The perfectly matched layer (PML) is used f or the absorbing boundary conditions (ABC's). The boundary conditions for a perfect conductor not well suited to the Cartesian coordinate sy stem are also proposed. According to this algorithm, the boundary cond itions are satisfied in an average Fashion at the conductor surface wi thout changing the computational scheme. In this sense, numerical comp utations based on the present method are simple but flexible. Numerica l results show good convergence.