Study on Wave Propagation and Boundary Absorption Performance using a Body-of-Revolution Finite-Difference Time-Domain (BOR-FDTD) Method

This paper presents some studies on electromagnetic wave propagation and absorption performance at boundary through an in-house developed solver based on a body-of-revolution finite-difference time-domain (BOR-FDTD) method. A generalized unsplit perfectly matched layer (U-PML) technique is incorporated with the solver. Time domain results on wave propagation through various structures, including parallel-plate disk, coaxial cable and general free-space, and frequency spectrum of the U-PML performance are presented. The U-PML shows a good absorption performance through flexibility in adjusting the layer thickness. The BOR-FDTD method offers tremendous savings in both computational memory and time when rotationally symmetric structures are analyzed