PIER
 
Progress In Electromagnetics Research
ISSN: 1070-4698, E-ISSN: 1559-8985
Home | Search | Notification | Authors | Submission | PIERS Home | EM Academy
Home > Vol. 76 > pp. 275-284

FDTD/TDPO HYBRID APPROACH FOR ANALYSIS OF THE EM SCATTERING OF COMBINATIVE OBJECTS

By L.-X. Yang, D.-B. Ge, and B. Wei

Full Article PDF (337 KB)

Abstract:
A time-domain hybrid approach that combines the Finite- Difference Time-Domain (FDTD) method with Time Domain Physical Optics (TDPO) is presented. The approach can be applied to the analysis of the backscattering of combinative objects including a Small- Size structure (SS) and a Large-Size structure (LS) with respect to the wavelength of interest. When dealing with the coupling of SS to LS, the near-to-near field extrapolation technique based on Kirchhoff's surface integral representation is used and a sequential transfer method is developed. According to the time domain calculation sequence in FDTD, the contribution of SS to LS is transferred directly to far zone observation point. The sequential transfer method has some advantages in high efficiency and small amounts of computer memory. For far zone back scattering, the influence of LS onto SS can be obtained by using the reciprocity theorem. Finally, the validation and application examples are presented, demonstrating the accuracy and effectiveness of this approach.

Citation: (See works that cites this article)
L.-X. Yang, D.-B. Ge, and B. Wei, "FDTD/TDPO Hybrid Approach for Analysis of the EM Scattering of Combinative Objects," Progress In Electromagnetics Research, Vol. 76, 275-284, 2007.
doi:10.2528/PIER07071206
http://www.jpier.org/PIER/pier.php?paper=07071206

References:
1. Nie, X.-C., Y.-B. Gan, N. Yuan, C.-F. Wang, and L.-W. Li, "An efficient hybrid method for analysis of slot arrays enclosed by a large radome," J. of Electromagn. Wave and Appl., Vol. 20, No. 2, 249-264, 2006.
doi:10.1163/156939306775777215

2. Jakobus, U. and M. L Friedrich, "Improved PO-MM hybrid formulation for scattering from three-dimensional perfectly conducting bodies of arbitrary shape," IEEE Trans. on Antennas and Propagat., Vol. 43, No. 2, 162-169, 1995.
doi:10.1109/8.366378

3. Wang, Y., K. C. Sujeet, and S. N. Safieddin, "An FDTD/raytracing analysis method for wave penetration through inhomogeneous walls," IEEE Trans. On Antennas and Propagat., Vol. 50, No. 11, 1598-1604, 2002.
doi:10.1109/TAP.2002.802157

4. Taflove, A., Computational Electrodynamics: The Finite- Difference Time-Domain Method, Artech House, Norwood, MA, 1995.

5. Sun, E.-Y. and W. V. T. Rusch, "Time-domain physical-optics," IEEE Trans. On Antennas and Propagat., Vol. 42, No. 1, 9-15, 1994.
doi:10.1109/8.272295

6. Le Bolzer, F., R. Gillard, J. Citerne, V. Fouad Hanna, and M. F. Wong, "An hybrid formulation combining FDTD and TDPO," 1998 IEEE Int. Antennas Propagat. Symp. Dig., Vol. 2, No. 36, 952-955, 1998.

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

8. Qian, Z. H., R. S. Chen, K. W. Leung, and H. W. Yang, "FDTD analysis of microstrip patch antenna covered by plasma sheath," Progress In Electromagnetics Research, Vol. 52, 173-183, 2005.
doi:10.2528/PIER04080901

9. Ayestar, R. G. and F. Las-Heras, "Near field to far field transformation using neural networks and source reconstruction," J. of Electromagn. Wave and Appl., Vol. 20, No. 15, 2201-2213, 2006.
doi:10.1163/156939306779322594

10. Ferrara, F., C. Gennarelli, R, Guerriero, G. Riccio, and C. Savarese, "An efficient near-field to far-field transformation using the planar wide-mesh scanning," J. of Electromagn. Wave and Appl., Vol. 21, No. 3, 341-357, 2007.
doi:10.1163/156939307779367404

11. Ramahi, O. M., "Near-and far-field calculations in FDTD simulations using Kirchhoff surface integral representation," IEEE Trans. on Antennas and Propagat., Vol. 45, No. 5, 753-759, 1997.
doi:10.1109/8.575616

12. Guo, L.-X., Y.-H. Wang, and Z.-S. Wu, "Application of the equivalence principle and the reciprocity theorem to electromagnetic scattering from two adjacent spherical objects," Acta Physica Sinica, Vol. 55, No. 11, 5815-5823, 2006.


© Copyright 2014 EMW Publishing. All Rights Reserved