Capacitance Extraction for Microstrip Lines Using Conformal Technique Based on Finite-Difference Method
Keywords:Capacitance extraction, conformal technique, finite-difference method (FDM)
In this paper, a novel method using conformal technique of finite-difference method (FDM) is proposed to capacitance extraction of microstrip lines. Instead of deriving the average dielectric constant epsilon, this method uses electric field numerical weights to process the inhomogeneous cells, and takes the discontinuous effects of both inhomogeneous Ampere cell and Faraday cell into account. Besides, a new boundary condition is proposed, where the cells obeying exponential distribution are added at boundary. The new method shows good agreement with the measurement and traditional methods.
Y. Liu, K. Lan, and K. Mei, “Capacitance extraction for electro static multiconductor problems by on-surface MEI,” IEEE Trans. Advanc. Packag., vol. 23, no. 3, pp. 489-494, 2000.
J. Wang, W. Y. Yin, and Q. H, Liu, “FDTD (2, 4)- compatible conformal technique for treatment of dielectric surfaces,” Electronics Lett., vol. 45, no. 3, pp. 146-147, Jan. 29, 2009.
J. Wang, W. Y. Yin, and Y. S. Xia, “A novel conformal surface current technique for large problems based on high-performance parallel FDTD method,” IEEE Antennas and Wireless Propag. Lett., vol. 12, pp. 11-14, 2013.
L. Liou, Y. Mah, and A. Ferendeci, “Equivalent circuit parameter extraction of microstrip coupling lines using FDTD method,” IEEE Int. Symp. Antennas Propag., vol. 3, pp. 2488-1491, 2000.
W. Yu and R. Mittra, “A conformal finite difference time domain technique for modeling curved dielectric surfaces,” IEEE Microw. Wireless Comp. Lett., vol. 11, no. 1, pp. 25-27, Jan. 2001.
J. Zhou and J. Zhao, “Efficient high-order absorbing boundary conditions for the ADI-FDTD method,” IEEE Microw. Wireless Comp. Lett., vol. 19, no. 1, pp. 25-27, Jan. 2009.
H. Shao, W. Hong, and Y. Zhou, “Generalized Zdomain absorbing boundary conditions for the analysis of electromagnetic problems with finitedifference time-domain method,” IEEE Trans. Microw. Theory Tech., vol. 51, pp. 82-90, 2003.
S. Wang and F. L. Teixeira, “An efficient PML implementation for the ADI-FDTD method,” IEEE Mirow. Wireless Compon. Lett., vol. 13, no. 2, pp. 72-74, Feb. 2003.