volume | PIER Journals

Abstract

In this paper, a new numerical technique, passing center swing back grids (PCSBG's) for the resolution of the grid distortion difficulty due to the rotational motion of objects is introduced. This proposed swing-back-grids approach alongside of the method of characteristics (MOC) is developed to solve EM scattering problems featured with rotating objects. The feasibility of such combination is apparent from the fact that MOC defines all field quantities in the centroid of the grid cell. The scattered EM fields from a rotating circular cylinder under the excitation of an EM pulse are predicted in two dimensions and the electric field distributions recorded at several time instances are demonstrated. In order to confirm that the cylinder is rotating and scattering EM fields simultaneously, the circular cylinder is uniformly divided into an even number of slices with one perfect reflector and one non-reflector alternatively since a rotating circular cylinder causes no relativistic effects.

1. Holmes, J. F., "Scattering of plane electromagnetic waves by moving objects," Proceedings of the IEEE, Vol. 58, No. 5, 829-830, May 1970.
doi:10.1109/PROC.1970.7768 Google Scholar

2. Cooper, J., "Scattering of electromagnetic fields by a moving boundary: The one-dimensional case," IEEE Trans. Antennas Propagation, Vol. 28, No. 6, 791-795, November 1980.
doi:10.1109/TAP.1980.1142445 Google Scholar

3. Harfoush, F., A. Taflove, and G. Kriegsmann, "A numerical technique for analyzing electromagnetic wave scattering from moving surfaces in one and two dimensions," IEEE Trans. Antennas Propagation, Vol. 37, 55-63, January 1989.
doi:10.1109/8.192164 Google Scholar

4. Cooper, J., "Longtime behavior and energy growth for electromagnetic waves reflected by a moving boundary," IEEE Trans. Antennas Propagation, Vol. 41, No. 10, 1365-1370, October 1993.
doi:10.1109/8.247776 Google Scholar

5. De Cupis, P., P. Burghignoli, G. Gerosa, and M. Marziale, "Electromagnetic wave scattering by a perfectly conducting wedge in uniform translational motion ," Journal of Electromagnetic Waves and Applications, Vol. 16, No. 8, 345-364, 2002.
doi:10.1163/156939302X01182 Google Scholar

6. De Cupis, P., G. Gerosa, and G. Schettini, "Electromagnetic scattering by an object in relativistic translational motion," Journal of Electromagnetic Waves and Applications, Vol. 14, No. 8, 1037-1062, 2000.
doi:10.1163/156939300X00969 Google Scholar

7. Ciarkowski, A., "Electromagetic pulse diffraction by a moving half-plane," Progress In Electromagnetics Research, PIER 64, 53-67, 2006. Google Scholar

8. Gaffour, L., "Analytical method for solving the one-dimensional wave equation with moving boundary," Progress In Electromagnetics Research, PIER 20, 63-73, 1998. Google Scholar

9. Gaffour, L., "Nature of electromagnetic field and energy behavior in a plane resonator with moving boundary," Progress In Electromagnetics Research, PIER 23, 265-276, 1999. Google Scholar

10. Censor, D., "Non-relativistic scattering in the presence of moving objects: The Mie problem for a moving sphere," Progress In Electromagnetics Research, PIER 46, 1-32, 2004. Google Scholar

11. Censor, D., "Free-space relativistic low-frequency scattering by moving objects," Progress In Electromagnetics Research, PIER 72, 195-214, 2007. Google Scholar

12. Borkar, S. R. and R. Yang, "Scattering of electromagnetic waves from rough oscillating surface using spectral Fourier method," IEEE Trans. Antennas Propagation, Vol. 21, No. 5, 734-736, September 1973.
doi:10.1109/TAP.1973.1140574 Google Scholar

13. Kleinman, R. E. and R. B. Mack, Scattering by linearly vibrating objects, Vol. 27, No. 3, 344-352, IEEE Trans. Antennas Propagation, May 1979.

14. Van Bladel, J. and D. De Zutter, "Reflection from linearly vibrating objects: Plane mirror at normal incidence," IEEE Trans. Antennas Propagation, Vol. 29, No. 4, 629-37, July 1981.
doi:10.1109/TAP.1981.1142645 Google Scholar

15. Ho, M., "One-dimensional simulation of reflected EM pulses from objects vibrating at different frequencies," Progress In Electromagnetics Research, PIER 53, 239-248, 2005. Google Scholar

16. Ho, M., "Scattering of EM waves by vibrating perfect surfaces simulation using relativistic boundary conditions," Journal of Electromagnetic Waves and Applications, Vol. 20, No. 4, 425-433, 2006.
doi:10.1163/156939306776117108 Google Scholar

17. Ho, M., "Scattering of EM waves from traveling and/or vibrating perfect surface: Numerical simulation," IEEE Trans. Antennas Propagation, Vol. 54, No. 1, 152-156, January 2006.
doi:10.1109/TAP.2005.861552 Google Scholar

18. Ho, M., "Propagation of electromagnetic pulse onto a moving lossless dielectric half-space: One-dimensional simulation using characteristic-based method," Journal of Electromagnetic Waves and Applications, Vol. 19, No. 4, 469-478, 2005.
doi:10.1163/1569393053303910 Google Scholar

19. Van Bladel, J., "Relativistic theory of rotating disks," Proceedings of the IEEE, Vol. 61, No. 3, 260-268, March 1973.
doi:10.1109/PROC.1973.9029 Google Scholar

20. Van Bladel, J., "Electromagnetic fields in the presence of rotating bodies," Proceedings of the IEEE, Vol. 64, No. 3, 301-318, March 1976.
doi:10.1109/PROC.1976.10111 Google Scholar

21. Moaveni, M. K. and H. Vazifehdoost, "Rotating blades radio interference in a helicopter-borne CW doppler radar," IEEE Transactions on Aerospace and Electronic Systems, Vol. 17, No. 1, 72-82, 1981.
doi:10.1109/TAES.1981.309038 Google Scholar

22. Zhang, Y., M. G. Amin, and V. Mancuso, "On the effects of rotating blades on DS/SS communication systems," Proceedings of the Tenth IEEE Workshop on Statistical Signal and Array Processing, 682-686, 2000.
doi:10.1109/SSAP.2000.870213 Google Scholar

23. Zhang, Y., A. Hoorfar, V. Mancuso, J. Nachamkin, and M. G. Amin, "Characteristics of the rotating blade channel for FH/FM communication systems ," Sixth International Symposium on Signal Processing and Its Applications, Vol. 2, 493-496, 2001.
doi:10.1109/ISSPA.2001.950188 Google Scholar

Professor Mingtsu Ho