Title :
Low-reflection subgridding
Author :
Kulas, Lukasz ; Mrozowski, Michal
Author_Institution :
Dept. of Electron., Gdansk Univ. of Technol., Poland
fDate :
5/1/2005 12:00:00 AM
Abstract :
The paper presents a novel three-dimensional subgridding scheme applicable to the finite-difference technique in the time and frequency domains. Transfer of fields between a main grid and a refined volume is performed using a simple linear interpolation. Very low-reflection levels from the main to local grid interface are obtained by co-location of fields used in the interpolation process. The technique allows material traverse without any special boundary treatment. The accuracy of the scheme is verified in numerical tests showing excellent performance even for high refinement factors.
Keywords :
electromagnetic wave propagation; finite difference time-domain analysis; frequency-domain analysis; interpolation; 3D subgridding scheme; field co-location; field transfer; finite difference frequency domain; finite difference time domain; linear interpolation; local grid interface; low-reflection subgridding; material traverse; Finite difference methods; Frequency domain analysis; Frequency estimation; Helium; Interpolation; Rectangular waveguides; Refining; Reflection; Testing; Time domain analysis; Finite difference frequency domain (FDFD); finite difference time domain (FDTD); subgridding technique;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2005.847048
