In this paper a recently developed provably passive and stable 3D FDTD subgridding technique, based on finite elements principles, is extended to Body-Of-Revolution (BOR) FDTD. First, a suitable choice of basis functions is presented together with the mechanism to assemble them into an overall mesh consisting of coarse and fine mesh cells. Invoking appropriate masslumping concepts then leads to...

The multi-beam antenna system has important applications in the aeronautics and astronautics field, which has caught much attention in recent years. This paper analyze a multibeam antenna consisted of spherical lens and multi feeds. Firstly, the single feed’s performance of the spherical-lens antenna is analyzed. In view of the axial symmetry of the antenna, the BOR-FDTD method is used to reduc...

Ultra-short pulse is a promising technology for achieving ultra-high data rate transmission which is required to follow the increased demand of data transport over an optical communication system. Therefore, the propagation of such type of pulses and the effects that it may suffer during its transmission through an optical waveguide have received a great deal of attention in the recent years. O...