MWI in 3D cylindrical coordinates

MWI (mesh wave impedance) is defined and formulated in 3D cylindrical coordinates. MWI is utilized for calculating the numerical reflection caused by using different mesh increment. The theoretical result is coincidental well with that of FDTD. The numerical experiment proves that MWI can accurately calculate the reflection made by different mesh increment, and offers a good theoretical criterion to define the proper variable coefficient of mesh increment, which induces less numerical reflection.