A power combiner/divider having a front end and a rear end and including a stepped main center conductor defining an axis and having portions with different outer diameters; an input connector having a center conductor, adapted to be coupled to a signal source, electrically coupled to the main conductor and having an axis aligned with the main conductor axis; a plurality of output connectors having respective axes that are perpendicular to the main conductor axis, the output connectors being radially spaced apart relative to the main conductor, the output connectors having center conductors; a plurality of nested cylinders proximate the front end and arranged with gaps defining at least three gaps providing coaxial transmission lines; and a plurality of nested cylinders proximate the rear end, one of which having apertures perpendicular to the main conductor axis receiving the center conductors of the output connectors, the nested cylinders proximate the rear end defining at least three gaps.