Abstract:Anovelhybridimplicit–explicit(HIE)finite-differencetime-domain(FDTD)method,whichisextremelyusefulforproblemswithveryfinestructuresalongthew-directionincylindricalcoordinatesystem,ispresented.ThismethodhashighercomputationefficiencythanconventionalcylindricalFDTDmethods,becausethetim