Abstract

The complex envelope (CE) finite-difference time-domain (FDTD) method has been proposed for solving electromagnetic fields of limited frequency-bands. However, it has been formulated often in terms of wave equations. In addition, its numerical properties have not been thoroughly studied. In this paper, a full-wave CE-FDTD method is presented and its numerical stability and dispersion properties are analyzed. It is found that if the carrier frequency is sufficiently high or numerical cell sizes are adequately large, the time step is no longer bounded by the stability condition; otherwise the time step is constrained by a CFL like stability condition. However, through the numerical dispersion analysis, the errors caused by large time step are not acceptable. Thus the CE-FDTD does not present much gain in computation efficiency over the conventional FDTD.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.