Quasi-static FDTD scheme for electrically-small regions in free space and lossless or lossy penetrable media

See, Chan Hwang; Abd-Alhameed, Raed; Mutardi, M.; Excell, Peter S.; Vaul, J.

Abstract

The standard finite-difference time-domain (FDTD) method requires extremely small time-step sizes when modelling electrically-small regions: the method can thus become impractical due to the unaffordable computation times required. Implementation of a quasistatic approximate version of FDTD can solve this problem. This approach is based on transferring the working frequency to a higher frequency, to reduce the number of time steps required. In order to prove the validity of the quasistatic approach, a three-dimensional FDTD program was used to directly model a single homogeneous or multilayered sphere inside a lossless or lossy problem space. By implementing the frequency scaling approach, the number of FDTD time steps can be reduced. The reflection on the interface layers inside the computational domain of FDTD is also reduced in lossless and lossy media.

• Presentation Conference Type: Conference Paper (Published)
• Conference Name: Fifth IEE International Conference on Computation in Electromagnetics
• Start Date: Apr 19, 2004
• End Date: Apr 22, 2004
• Acceptance Date: Feb 16, 2004
• Publication Date: Apr 19, 2004
• Deposit Date: Jun 12, 2019
• Pages: 155-156
• DOI: https://doi.org/10.1049/cp%3A20040488
• Keywords: absorbing media; finite difference time-domain analysis
• Public URL: http://researchrepository.napier.ac.uk/Output/1870883