Field probe for measuring vector components of an electromagnetic field

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. Each loop is connected to a corresponding magnetic field output port through an additive network having eight inputs, each input being connected to a different end of an element of the loop.