Analysis of waveguides structures using 3-D reduction meshing applied in Finite-Element Time-Domain (RM-FETD)

This paper present the solution of the vector wave equation by a discrete time domain finite element method, based on the New Reduction meshing in three dimension RM-FETD (reduction meshing-finite element time domain). These techniques allow obtaining a fully explicit time integration procedure. The sampling rate of the time domain waveform is governed by the Nyquist rate of the Gaussian test signal instead of the carrier signal in the unconditionally stable RM-FETD method. Compared to the traditional FETD, the cost can be dramatically reduced when the test signal and carrier ratio is very small. This technique is implemented to solve a microwave guided structures. Numerical formulations are presented and simulations are compared with the normalize simulator.