PROPAGATION CHARACTERS OF PLANE WAVE IN THE PERFECTLY MATCHED LAYER
平面波在三维完全匹配层中的传播特性

The Perfectly Matched Layer(PML)is very effective in absorbing propagating wave, so that it has been successfully applied in FDTD research. Katz(1994) derived 12 differential equations in three-dimensional PML, but there is no conclusion for the propagation characters of plane wave in PML such as wave expression ,wave number and wave impedance. These characters are investigated in this paper.