Total field scattering field formulation in a non-uniform grid by means of FDTD-DPW. Issue 1 (2nd January 2020)

• Record Type: Journal Article
• Authors: Sohrabi, Reza; Moreno, Enrique; Michael, Ernest Alexander
• Is Part Of: Electromagnetics. Volume 40:Issue 1(2020)
• Page Start: 40
• Page End: 55
• Publication Date: 2020-01-02
• Subjects: Non uniform grids -- discrete finite difference time domain -- total field scattering field scheme -- multi-scale electromagnetic problems; Electromagnetism -- Periodicals; 537
• DOI: 10.1080/02726343.2019.1695089
• Languages: English
• ISSNs: 0272-6343

Abstract

ABSTRACT: Finite-difference time-domain discrete plane wave technique (FDTD-DPW) is a numerical method which by using total the field/scattered field scheme allows one to propagate a plane wave quasi-perfectly isolated. This means a propagation in the total field domain without reflexions to the scattered field domain on the order of machine precision (−300 dB). This technique is valid for any angle of propagation, and for any gridcell aspect ratio. In this work, we extend this numerical illumination procedure for uniform three-dimensional grids to domains that are meshed by a non-uniform grid. To do so, we introduce some modifications to the original FDTD-DPW technique.