Abstract:
Electromagnetic scattering solutions are developed for coated perfectly conducting bodies of revolution (BOR) that satisfy the impedance boundary condition. The integral ...Show MoreMetadata
Abstract:
Electromagnetic scattering solutions are developed for coated perfectly conducting bodies of revolution (BOR) that satisfy the impedance boundary condition. The integral equation arising from the impedance (Leontovich) boundary condition is solved by use of the method of moments (MM) technique along with an Ansatz for the surface currents that is derived from physical optics (PO) and the Fock theory that is modified for imperfectly conducting surfaces. The MM solution is expressed in terms of two integral (Galerkin) operators. The form of the Galerkin expansion used results in a symmetric MM system matrix. The hybrid solution is specialized for BOR's although the approach is applicable to a broader class of scatterers as well. The results are compared with the Mie solution for penetrable spherical scatterers, which satisfy the impedance boundary condition, and with recently published MM solutions for nonspherical scatterers.
Published in: IEEE Transactions on Antennas and Propagation ( Volume: 34, Issue: 11, November 1986)
References is not available for this document.
Select All
1.
M. A. Leontovich, Investigation of Propagation of Radiowaves, Moscow, 1948.
2.
V. A. Fock, J. Phys. USSR, vol. 10, pp. 13, 1946.
3.
V. A. Fock, Electromagnetic Diffraction and Propagation Problems, U.K., London:Pergamon, 1965.
4.
T. A. Senior, "Impedance boundary conditions for imperfectly conducting surfaces", Appl. Sci. Res., vol. 8, pp. 418, 1960.
5.
"A note on impedance boundary conditions", Can. J. Phys., vol. 40, pp. 663, 1962.
6.
N. G. Alexopoulos and G. A. Tadler, "Scattering from spheroidal composite objects", Franklin Inst. J., vol. 309, pp. 147, 1980.
7.
N. G. Alexopoulos and G. A. Tadler, "Accuracy of the Leontovich boundary condition for continuous and discontinuous surface impedances", J. Appl. Phys., vol. 46, pp. 3326, 1975.
8.
N. G. Alexopoulos and G. A. Tadler, "Electromagnetic scattering from an elliptic cylinder loaded by continuous and discontinuous surface impedances", J. Appl. Phys., vol. 46, pp. 1128, 1975.
9.
J. R. Wait and C. M. Jackson, "Calculations of the bistatic scattering cross section of a sphere with an impedance boundary condition", Radio Sci. J. Res. NBS/USNC-URSI, vol. 69D, pp. 299, 1965.
10.
J. R. Wait, "Exact surface impedance for a cylindrical conductor", Electron. Lett., vol. 15, no. 20, pp. 659, 1979.
11.
J. R. Wait, "Exact surface impedance for a spherical conductor", Proc. IEEE, vol. 68, pp. 279, 1980.
12.
J. R. Wait, "Electromagnetic surface impedance for a layered earth for general excitation", Radio Sci., vol. 15, pp. 129, 1980.
13.
D. A. Hill and J. R. Wait, "Ground wave attenuation for a spherical earth with arbitraiy surface impedance", Radio Sci., vol. 15, pp. 637, 1980.
14.
D. A. Hill and J. R. Wait, "HF ground wave propagation over mixed land sea and sea-ice paths", IEEE Trans. Geosci. Remote Sensing, vol. GE-19, pp. 210, 1981.
15.
J. J. Bowman and V. H. Weston, "The effect of curvature on the reflection coefficient of layered absorbers", IEEE Trans. Antennas Propagat., vol. AP-14, pp. 760, 1966.
16.
L. N. Medgyesi-Mitschang and D.-S. Wang, "Hybrid solutions for scattering from perfectly conducting bodies of revolution", IEEE Trans. Antennas Propagat., vol. AP-31, pp. 570, 1983.
17.
L. N. Medgyesi-Mitschang and D.-S. Wang, "Hybrid solutions for scattering from large bodies of revolution with material discontinuities and coatings", IEEE Trans. Antennas Propagat., vol. AP-32, pp. 717, 1984.
18.
L. N. Medgyesi-Mitschang and J. M. Putnam, "Integral equation formulations for imperfectly conducting scatterers", IEEE Trans. Antennas Propagat., vol. AJP-33, pp. 206, 1985.
19.
D. S. Jones, Methods in Electromagnetic Wave Propagation, Oxford:Clarendon, 1979.
20.
D. S. Wang and L. N. Medgyesi-Mitschang, "Hybrid solutions for scattering from imperfectly conducting bodies", Int. IEEE/Antennas Propagat. Soc. Symp. Nat. Radio Sci. Meeting, 1985-June.
21.
D. S. Wang, "Limits and validity of the impedance boundary condition for penetrable surfaces", IEEE Trans. Antennas Propagat.
22.
P. I.. Ufimtsev, "Approximate calculations of the diffraction of plane electromagnetic waves by certain metal objects", Soviet Physics—Tech. Physics, vol. 27, no. 8, pp. 1708, 1957.
23.
N. A. Logan, General research in diffraction theory, vol. 1 and 2, Dec. 1959.
24.
J. R. Wait and A. M. Conda, "Pattern of an antenna on a curved lossy surface", IRE Trans. Antennas Propagat., vol. AP-6, pp. 348-359, 1958.