Title :
Transient image theory for 2-D and 3-D conducting wedge problems
Author :
Nikoskinen, K.I. ; Ermutlu, M.E. ; Lindell, I.V.
Author_Institution :
Electromagn. Lab., Helsinki Univ. of Technol., Espoo, Finland
fDate :
11/1/1994 12:00:00 AM
Abstract :
In the present paper, two- and three-dimensional transient scattering from a perfectly conducting wedge is studied. The exciting sources analyzed are an infinite impulsive line current parallel to edge of the conductor and an arbitrarily oriented electric dipole. The analysis presented is based on the time-harmonic image solution found for the scattered field. The frequency-domain image current corresponding to the field contribution from the wedge is an exact function expressed in terms of simple trigonometric functions. It is dependent only on the coordinates and the amplitude of the source, but it is independent of the observation point. It is shown that the transient scattering can be interpreted as arising from an image source by generalizing the time domain Green´s function to complex source points
Keywords :
Green´s function methods; conductors (electric); electromagnetic wave scattering; frequency-domain analysis; time-domain analysis; 2D conducting wedge problem; 3D conducting wedge problems; amplitude; arbitrarily oriented electric dipole; complex source points; coordinates; exciting sources; field contribution; frequency-domain image current; infinite impulsive line current; observation point; perfectly conducting wedge; scattered field; time domain Green´s function; time-harmonic image solution; transient scattering; Boundary conditions; Conductors; Current distribution; Electromagnetic scattering; Fourier transforms; Frequency domain analysis; Image analysis; Optical diffraction; Optical scattering; Space technology;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
