Electromagnetic Scattering Analysis from Inhomogeneous Material Scatterers

불균질 매질내에서의 전자파 산란 해석

  • Published : 2003.06.01

Abstract

The electromagnetic wave scattering problems from inhomogeneous material bodies are considered. The formulation is made in terms of mixed potentials for the moment methods (MoM). The surfaces of a three-dimensional inhomogeneous scatterer of arbitrary shape are divide into triangular patches for descretization. Application of the boundary conditions leads to the coupled surface integral equations to be satisfied for the unknown surface equivalent electric and magnetic currents. The radar cross-section (RCS) for some structures is computed and the results are compared with the reported data.

본 논문에서는 비 등방성 복합 산란체의 전자파 산란문제를 surface integral equation을 적용하여 정식화하는 절차를 보였다. 산란체에는 평면파가 입사하는 것으로 가정하고, 산란체의 표면에 유기되는 등가 표면 전류 및 자류 밀도를 계산하기 위하여 모멘트법을 이용하여 산란체의 표면을 삼각 요소로 이산화하여 적절한 경계조건하에서 몇 가지 수치계산 모델에 대하여 계산을 수행하고 그 유효성을 검증하였다. 계산된 후방산란단면적의 결과는 측정결과와 잘 일치하였다.

Keywords

References

  1. R F. Harrington, 'Field Computation by Moment Methods', New York: Macmillan, 1992
  2. Korada Umashankar et al.,' Electro-magnetic scattering by arbitrary shape three-dimensional homogeneous lossy dielectric objects', IEEE Trans. Antennas Propagat., AP-34, pp. 758-766, 1986
  3. Morteza Analoui and Y. Kagawa, 'Electr o-magnetic scattering from conductor coated material bodies', Int. Journal of Numerical Modelling: Electronic Networks, Devices and Fields, Vol.4, pp. 287-299, 1991 https://doi.org/10.1002/jnm.1660040404
  4. S. M. Rao et aI., 'Electromagnetic scattering by surfaces of arbitrary shape', IEEE Trans. Antennas Propagat., AP-30, pp. 409-418, 1982
  5. Louis N. Medgyesi-Mitschang et aI., 'Elec-tromagnetic scattering from axially inhom-ogeneous bodies of revolution', IEEE Trans. Antennas Propagat., AP-32, pp. 797-806, 1984