Optimization of Uniaxial Perfectly Matched Layer Parameters for Finite Difference Time Domain Simulation and Application to Coupled Microtrip Lines with Multiple Bend Discontinuities

摘要

The finite difference time domain method is applied for the analysis of coupled microstrip liens with multiple right angle bends. The uniaxial perfectly matched layer (UPML) boundary condition is used to absorb outward waves. The UPML parameters are optimized to obtain absorption of both propagating and evanescent waves. It is also shown that this optimization increases the cutoff time and makes it possible to simulate the structures for a larger number of time steps.