volume | PIER Journals

2007-01-11

Efficient Near-Field Computation for Radiation and Scattering from Conducting Surfaces of Arbitrary Shape

Khalid Fawzy Ahmed Hussein

Professor Khalid Fawzy Ahmed Hussein

Microwave Engineering Department

Electronics Research Institute

Egypt

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, Vol. 69, 267-285, 2007

doi:10.2528/PIER07010302 | Google Scholar

Abstract

A new algorithm for numerical evaluation of the fields in the near zone of conducting scatterers or antennas of arbitrary shape is developed in the present work. This algorithm is simple, fast, robust andis basedon a preceding calculation of the current flowing on the conducting surface using the electric filed integral equation (EFIE) technique that employs the Rao-Wilton-Glisson (RWG) basis functions. To examine the validity of the near field computational algorithm developed in the present work, it is applied to calculate the near fieldd ue to plane wave incidence on a variety of conducting scatterers. The solution obtainedfor the fields in the near zone is found to satisfy the boundary conditions on both planar and curved scatterer surfaces and the edge condition for structures possessing edges or corners. The solutions obtainedusing the new algorithm are compared with those obtainedusing some commercial packages that employ the finite-difference-time-domain (FDTD). The algorithm defined in the present work gives results which are more accurate in describing the fields near the edges than the results obtained using the FDTD.

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Khalid Fawzy Ahmed Hussein, "Efficient Near-Field Computation for Radiation and Scattering from Conducting Surfaces of Arbitrary Shape," , Vol. 69, 267-285, 2007.
doi:10.2528/PIER07010302

References

1. Davidson, D. B., Computational Electromagnetics for RF and Microwave Engineering, Cambridge University Press, 2005.

2. Miano, G. andF. Villone, "A surface integral formulation of Maxwell equations for topologically complex conducting domains," IEEE Trans. Antennas Propagat., Vol. 53, No. 12, 4001-4014, 2005.
doi:10.1109/TAP.2005.859898 Google Scholar

3. Yla-Oijala, P., M. Taskinen, and andJ. Sarvas, "Surface integral equation methodfor general composite material andd ielectric structures with junctions," Progress In Electromagnetics Research, Vol. 52, 81-108, 2005.
doi:10.2528/PIER04071301 Google Scholar

4. Hanninen, I., M. Taskinen, and andJ. Sarvas, "Singularity subtraction integral formulae for surface integral equations with RWG, rooftop andh ybridbasis functions," Progress In Electromagnetics Research, Vol. 63, 243-278, 2006.
doi:10.2528/PIER06051901 Google Scholar

5. Shore, R. A. andA. D. Yaghjian, "A low-order-singularity electricfieldin tegral equation solvable with pulse basis functions andp oint matching," Progress In Electromagnetics Research, Vol. 52, 129-151, 2005.
doi:10.2528/PIER04073004 Google Scholar

6. Rao, S. M., D. R. Wilton, and andA. W. Glisson, "Electromagnetic scattering by surfaces of arbitrary shape," IEEE Trans. Antennas Propagat., Vol. 30, No. 5, 409-418, 1982.
doi:10.1109/TAP.1982.1142818 Google Scholar

7. Cangellaris, A. C. andD. B. Wright, "Analysis of the numerical error causedb y the stair-steppedappro ximation of a conducting boundary in FDTD simulations of electromagnetic phenomena," IEEE Trans. Antennas Propagat., Vol. 39, No. 10, 1518-1525, 1991.
doi:10.1109/8.97384 Google Scholar

8. Lee, J. F., R. R. Panlandech, and R. Mittra, "Modeling threedimensional discontinuities in waveguides using non-orthogonal FDTD algorithm," IEEE Trans. Microwave Theory Tech., Vol. 40, No. 2, 346-352, 1992.
doi:10.1109/22.120108 Google Scholar

9. Jurgens, T. G. andA. Taflove, "Three-dimensional contour FDTD modeling of scattering from single and multiple bodies," IEEE Trans. Antennas Propagat., Vol. 41, No. 12, 1703-1708, 1993.
doi:10.1109/8.273315 Google Scholar

10. Dey, S. andR. Mittra, "A modifiedlo cally conformal finite difference time-domain algorithm for modeling three-dimensional perfectly conducting bodies," Microwave Optical Tech. Lett., Vol. 17, No. 6, 349-352, 1998.
doi:10.1002/(SICI)1098-2760(19980420)17:6<349::AID-MOP4>3.0.CO;2-H Google Scholar