IMAGE THEORY FOR REFLECTED TE TM WAVE IN WAVE-GUIDE/

The image principle is extended to the time-harmonic problem of TE/TM wave propagation and reflection in a waveguide. The fictitious image g enerating the reflected field is derived with the aid of Heaviside ope rational calculus and a transmission-line model of the waveguide, The operational calculus reveals that the image of a point-like source in front of the waveguide discontinuity Is another point-like source in t he mirror-image position and a line source extending from the mirror-i mage position to infinity, The image derived with operational calculus turns out to be independent of the waveguide's transverse geometry.