A method for specifying non-radiating, monochromatic, scalar sources and their fields

The theory and results concerning the class of spherically symmetric non-radiating sources and fields established in an earlier paper by Gamliel et al are generalized to the non-spherically symmetric case. A procedure is described for constructing bases for the spaces of all non-radiating sources and associated fields confined to a spherical volume. An example is presented illustrating the developed theory.