Abstract :
ESSENTIAL transmission properties of spherical waves are formulated in terms of familiar engineering concepts in this paper. Such a formulation places the subject of spherical waves within bounds of transmissionline theory, thus co-ordinating two apparently distinct subjects; moreover, this plan facilitates the solution of some shielding problems and emphasizes the physical aspects of shielding. The general formulas for shielding in terms of impedances for spherical waves are derived.
