Patent ID: 7119633

Claim:
A coupler comprising: at least four ports; a least first and second planar sets of conductive strips, each set of conductive strips including a plurality of interconnected conductive strips, and each conductive strip of the first set being electromagnetically coupled to at least one conductive strip of the second set, each set of conductive strips being connected between at least two ports, and at least a portion of each conductive strip extending in a common direction with an adjacent conductive strip of the same set; a ground conductor spaced from the first and second sets of conductive strips; and at least first and second planar conductive tabs capacitively coupled primarily to the ground conductor, the first conductive tab coplanar with and extending directly from the portion of a first conductive strip of the first set, the second conductive tab coplanar with and extending directly from the portion of a second conductive strip of the second set.