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Diffraction coefficients and field patterns of obtuse angle dielectric wedge illuminated by E-polarized plane wave

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1 Author(s)
S. -Y. Kim ; Appl. Electron. Lab., Korea Inst. of Sci. & Technol., Seoul, South Korea

The diffraction problem is treated for the incidence of an E -polarized plane wave on both interfaces of an obtuse dielectric wedge. Based on the dual integral equation, the total field is obtained by the sum of the physical optics solution and the edge-diffracted correction term. Calculated diffraction coefficients and field patterns are plotted in figures for a wedge angle of 120°, incident angles of 60° and 70°, and relative dielectric constants of 2 and 10. It is shown that the Neumann expansion to the nonuniform currents provides a more accurate correction to the physical optics currents than the multiple expansion as the angle of dielectric wedge increases

Published in:

IEEE Transactions on Antennas and Propagation  (Volume:40 ,  Issue: 11 )