SPACE AND TIME WAVE SHAPING FOR TRANSMISSION INTO A LOSSY MEDIUM

Electromagnetic waves traveling into a lossy medium suffer distortion in both time and space. This situation poses a design problem if it is desired to have a specified form, in both time and space, for the fie lds at a given location in the lossy medium. In this paper, an analyti cal procedure is presented so that the specified field in a lossy cond ucting half-space can be realized with a discrete array of concentric loop currents on the surface. Each loop current is stepped on at a fin ite sequence of discrete times. The procedure could be applied in geop hysical subsurface probing, hyperthermic cancer therapy, and digital s ignal transmission.