volume | PIER Journals

Abstract

A new FDTD modeling approach for active devices characterized by measured S-parameters is presented. This approach applies vector fitting technique and piecewise linear recursive convolution (PLRC) technique to complete modeling process, and does not need to know the equivalent circuits of active devices. It preserves the explicit nature of the traditional FDTD method, and a general updated formula is derived. Furthermore, the main data-processing procedure is directly handled over the frequency band of interest, which avoids the time-domain non-causal error in traditional techniques.

1. Taflove, A., Computational Electrodynamics-The Finite- Difference Time-Domain Method, 2nd edition, 2000.

2. Sui, W., D. A. Chirstensen, and C. H. Durney, "Extending the two-dimensional FDTD method to hybrid electromagnetic systems with active and passive lumped elements," IEEE Trans. Microwave Theory Tech., Vol. 40, No. 4, 724-730, 1992.
doi:10.1109/22.127522 Google Scholar

3. Piket-May, M., A. Taflove, and J. Baron, "FDTD modeling of digital signal propagation in 3-D circuits with passive and active lumped loads," IEEE Trans. Microwave Theory Tech., Vol. 42, No. 8, 1514-1523, 1994.
doi:10.1109/22.297814 Google Scholar

4. Kuo, C. N., R. B. Wu, B. Houshmand, and T. Itoh, "Modeling of microwave active devices using the voltage-source approach," IEEE Microwave Guided Wave Lett., Vol. 6, No. 5, 199-201, 1996.
doi:10.1109/75.491504 Google Scholar

5. Chu, Q. X., X. J. Hu, and K. T. Chan, "Models of small microwave devices in FDTD simulation," IEICE Trans. Electron., Vol. E86- C, No. 2, 120-125, 2003. Google Scholar

6. Reddy, V. S. and R. Garg, "An improved extended FDTD formulation for active microstrip circuits," IEEE Trans. Microwave Theory Tech., Vol. 47, No. 9, 1603-1608, 1999.
doi:10.1109/22.788599 Google Scholar

7. Zhang, J. Z. and Y. Y. Wang, "FDTD analysis of active circuits based on the S-parameters," Asia Pacific Microwave Conference, 1049-1053, 1997.

8. Ye, X. N. and J. L. Drewniak, "Incorporating two-port networks with S-parameters into FDTD," IEEE Microwave Wireless Comp. Lett., Vol. 11, No. 2, 77-79, 2001.
doi:10.1109/7260.914308 Google Scholar

9. Gustavsen, B. and A. Semlyen, "Rational approximation of frequency responses by vector fitting," IEEE Trans. Power Delivery, Vol. 14, No. 3, 1052-1061, 1999.
doi:10.1109/61.772353 Google Scholar

10. Kelley, D. F. and R. J. Luebbers, "Piecewise linear convolution for dispersive media using FDTD," IEEE Trans. Antennas Propagat., Vol. 44, No. 6, 792-797, 1996.
doi:10.1109/8.509882 Google Scholar

11. Lee, J. Y., J. H. Lee, and H. K. Jung, "Linear lumped loads in the FDTD method using piecewise linear recursive convolution method," IEEE Microwave Wireless Compon. Lett., Vol. 16, No. 4, 158-160, 2006.
doi:10.1109/LMWC.2006.872148 Google Scholar

12. Zheng, H.-X., X.-Q. Sheng, and E. K.-N. Yung, "Computation of scattering from conducting bodies coated with chiral materials using conformal FDTD," Journal of Electromagnetic Waves and Applications, Vol. 18, No. 11, 1761-1774, 2004.
doi:10.1163/1569393042954901 Google Scholar

13. Chen, X., D. Liang, and K. Huang, "Microwave imaging 3- D buried objects using parallel genetic algorithm combined with FDTD technique," Journal of Electromagnetic Waves and Applications, Vol. 20, No. 13, 1471-1484, 2006. Google Scholar

14. Hu, X.-J. and D.-B. Ge, "Time domain analysis of active transmission line using FDTD technique," Progress In Electromagnetics Research, Vol. 79, 305-319, 2008.
doi:10.2528/PIER07101902 Google Scholar

15. Xiao, S., B.-Z. Wang, P. Du, and Z. Shao, "An enhanced FDTD model for complex lumped circuits," Progress In Electromagnetics Research, Vol. 76, 485-495, 2007.
doi:10.2528/PIER07073003 Google Scholar

16. Kung, F. and H.-T. Chuah, "A Finite-Difference Time-Domain (FDTD) software for simulation of Printed Circuit Board (PCB) assembly," Progress In Electromagnetics Research, Vol. 50, 299-335, 2005.
doi:10.2528/PIER04071401 Google Scholar

17. Young, J. L. and R. Adams, "Excitation and detection of waves in the FDTD analysis of N-port networks," Progress In Electromagnetics Research, Vol. 53, 249-269, 2005.
doi:10.2528/PIER04100701 Google Scholar

18. Gong, Z. and G.-Q. Zhu, "FDTD analysis of an anisotropically coated missile," Progress In Electromagnetics Research, Vol. 64, 69-80, 2006.
doi:10.2528/PIER06071301 Google Scholar

19. Chen, Z.-H. and Q. Chu, "FDTD modeling of arbitrary linear lumped networks using piecewise linear recursive convolution technique," Progress In Electromagnetics Research, Vol. 73, 327-341, 2007.
doi:10.2528/PIER07042002 Google Scholar

20. Hu, X.-J. and D.-B. Ge, "Study on conformal FDTD for electromagnetic scattering by targets with thin coating," Progress In Electromagnetics Research, Vol. 79, 305-319, 2008.
doi:10.2528/PIER07101902 Google Scholar

21. Gustavsen, B. and A. Semlyen, "Rational approximation of frequency responses by vector fitting," IEEE Trans. Power Delivery, Vol. 14, No. 3, 1052-1061, 1999.
doi:10.1109/61.772353 Google Scholar

Dr. Dao Yi Su

Dr. De-Min Fu

Dr. Zhi-Hui Chen