Title :
Minimization of reflection error caused by absorbing boundary condition in the FDTD simulation of planar transmission lines
Author :
Naishadham, Krishna ; Lin, Xing Ping
Author_Institution :
Dept. of Electr. Eng., Wright State Univ., Dayton, OH, USA
fDate :
1/1/1996 12:00:00 AM
Abstract :
Residual reflection from absorbing boundaries introduces considerable error in the frequency-domain parameters of open-region planar transmission line components simulated in the time-domain. Various dispersive and super-absorbing boundary conditions have been developed to minimize this reflection. In this paper, a computationally efficient method, termed as geometry rearrangement technique (GRT), is proposed to correct the dominant reflection from absorbing boundaries by superposition of two subproblems with different source or boundary locations. The computational improvement of GRT is demonstrated by the FDTD simulation of dispersion in microstrip and coplanar transmission lines. A new method is discussed to accurately estimate the boundary reflection, and then applied to correct the characteristic impedance of planar transmission lines for boundary reflection
Keywords :
dispersion (wave); electromagnetic wave propagation; finite difference time-domain analysis; geometry; microstrip lines; waveguide theory; FDTD simulation; absorbing boundary condition; boundary reflection; characteristic impedance; computationally efficient method; coplanar transmission lines; dispersion; frequency-domain parameters; geometry rearrangement technique; microstrip; open-region planar transmission line components; planar transmission lines; reflection error; Boundary conditions; Computational geometry; Computational modeling; Dispersion; Finite difference methods; Microstrip; Planar transmission lines; Quantum computing; Reflection; Time domain analysis;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
