Title :
A solution for the transient field diffracted by an obtuse-angled dielectric wedge
Author :
Gennarelli, G. ; Riccio, G.
Author_Institution :
Inst. for Electromagn. Sensing of the Environ., Naples, Italy
fDate :
Oct. 29 2012-Nov. 1 2012
Abstract :
A solution is proposed in the time domain framework for evaluating the field diffracted by an obtuse-angled penetrable wedge in the case of pulsed plane waves orthogonally impinging on the edge. It takes advantage of the knowledge of a uniform asymptotic solution based on a Physical Optics approximation for the surface currents involved in the radiation integral. The corresponding frequency domain diffraction coefficients are used to determine the time domain counterparts in closed form via the inverse Laplace transform. Numerical tests and comparisons with Finite Difference Time Domain results confirm the effectiveness of the solution.
Keywords :
Laplace transforms; approximation theory; dielectric properties; electromagnetic wave diffraction; finite difference time-domain analysis; inverse transforms; physical optics; transient analysis; finite difference time domain analysis; frequency domain diffraction coefficients; inverse Laplace transform; obtuse-angled dielectric wedge; physical optics approximation; pulsed plane waves; radiation integral; surface currents; time domain framework; transient field; uniform asymptotic solution; Antennas; Dielectrics; Diffraction; Finite difference methods; Optical surface waves; Time domain analysis; dielectric wedge; diffraction; time domain;
Conference_Titel :
Microwave Conference (EuMC), 2012 42nd European
Conference_Location :
Amsterdam
Print_ISBN :
978-1-4673-2215-7
Electronic_ISBN :
978-2-87487-026-2
