N. Harada et M. Hano, PML ABSORBING BOUNDARY-CONDITION FOR NONCUBIC CELL TIME-DOMAIN METHOD, IEEE microwave and guided wave letters, 7(10), 1997, pp. 335-337
Conventional absorbing boundary conditions (ABC's) are used for cubic-
cell finite-difference time-domain (FDTD) grids, but not in noncubic c
ell time-domain grids, We propose an algorithm to apply perfectly matc
hed layer (PML) ABC to the noncubic cell time-domain method, The numer
ical experiments are conducted of the accuracy of the PML in a regular
triangle cell grid versus standard second-order Mur and PML ABC's in
a square-cell FDTD grid, The PML global error is about 10(-3) of the f
ormer and about three times of the latter, According to the convergent
characteristics this algorithm is equivalent to that of applying PML
ABC to the FDTD method.