Comparison and evaluation of boundary conditions for the absorption of guided waves in an FDTD simulation
- 1 December 1992
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Microwave and Guided Wave Letters
- Vol. 2 (12) , 499-501
- https://doi.org/10.1109/75.173408
Abstract
Several absorbing boundary conditions suitable for terminating the finite-difference-time-domain (FDTD) simulation of microstrip structures are compared via numerical experiments. Both a superabsorbing boundary and a modified form of Litva's dispersive boundary condition are found to produce significantly lower reflection than the traditional first-order Mur boundary. The sensitivity of these boundary conditions to the choice of the input parameters, particularly the effective dielectric constant epsilon /sub eff/, is investigated, and optimal choices of these parameters are given.<>Keywords
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