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Electromagnetic diffraction of an obliquely incident plane wave field by a wedge with impedance faces

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1 Author(s)
Rojas, R.G. ; Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA

A uniform asymptotic solution is presented for the electromagnetic diffraction by a wedge with impedance faces and with included angles equal to 0 (half-plane), π/2 (right-angled wedge), π (two-part plane) and 3π/2 (right-angled wedge). The incident field is a plane wave of arbitrary polarization, obliquely incident to the axis of the wedge. The formal solution, which is expressed in terms of an integral, was obtained by the generalized reflection method. A careful study of the singularities of the integrand is made before the asymptotic evaluation of the integral is carried out. The asymptotic evaluation of the integral is performed taking into account the presence of the surface wave poles in addition to the geometrical optics poles near the saddle points. This results in a uniform solution which is continuous acros the shadow boundaries of the geometrical optics fields as well as the surface wave fields

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Antennas and Propagation, IEEE Transactions on  (Volume:36 ,  Issue: 7 )