Abstract: An electromagnetically complete field vector field probe has a set of three dipoles extending along three mutually perpendicular axes, and three loops situated in mutually orthogonal planes defined by different pairs of said axes. The dipoles and loops are all disposed about a common center. Each dipole has a central element and two end elements, separated by gaps. Each loop has four conducting elements each extending from a point adjacent to one of the three axes to a point adjacent to another of the three axes. The conducting elements of each loop are separated from one another by gaps at the axes, so that each gap of each loop is substantially coincident with a gap of another loop and with a gap of a dipole. Coaxial lines extending through the central conducting elements of the dipoles are connected directly to the ends of the loop elements and need not extend through parts of the loop elements themselves.

Abstract: In a radial power combiner/divider in which radial slots are provided for suppression of undesired modes, certain undesired modes which are not adequately suppressed by the radial slots are allowed to be propagated in a central coaxial transmission line and suppressed therein by means of longitudinal slots in the outer conductor. In an alternative embodiment, the central transmission line of the combiner/divider is in the form of a circular waveguide, and the suppression means comprises thin, spaced coaxial cylinders of dissipative material.