| Extremely Low Numerical Dispersion FDTD Method Based on H(2, 4) Scheme for Lossy Material |
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Il-Young Oh1, Yongjun Hong2, Jong-Gwan Yook1 |
1School of Electrical and Electronic Engineering, Yonsei University
2Agency for Defense Development |
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| Abstract |
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This paper expands a previously proposed optimized higher order (2, 4) finite-difference time-domain scheme (H(2, 4) scheme) for use with lossy material. A low dispersion error is obtained by introducing a weighting factor and two scaling factors. The weighting factor creates isotropic dispersion, and the two scaling factors dramatically reduce the numerical dispersion error at an operating frequency. In addition, the results confirm that the proposed scheme performs better than the H(2, 4) scheme for wideband analysis. Lastly, the validity of the proposed scheme is verified by calculating a scattering problem of a lossy circular dielectric cylinder. |
| Key words:
Finite-Difference Time-Domain, Higher Order FDTD, Low Dispersion Algorithm, Optimization |
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