Journal
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
Volume 29, Issue 2, Pages 80-82Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LMWC.2019.2891109
Keywords
Compact finite-difference time-domain (C-FDTD) method; numerical stability; symplectic integrator
Categories
Funding
- NSFC [61871001, 61801163, 61701163]
- National Natural Science Fund for Excellent Young Scholars [61722101]
- Special Foundation for Young Scientists of Anhui Province [2013SQRL065ZD]
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Based on higher order symplectic integrator temporal derivatives and compact spatial derivatives, a new high-order symplectic compact finite-difference time-domain (FDTD) algorithm is proposed. The numerical stability criteria and dispersion relation are derived analytically. Compared with the traditional compact FDTD algorithm, the proposed algorithm can significantly reduce the numerical dispersion error and can be made nearly independent of the maximum limitation of the Courant-Friedrich-Levy law. By means of the numerical examples, the proposed algorithm has the benefit of conserving energy for long-time propagation, which can be used to enhance the computational efficiency for the full-wave-analysis of guided-wave structures.
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