Patent ID: 6774743
Filing Date: 2004-08-10
Classification: H01P

Abstract:
A microwave coupler comprising:a sandwiched plurality of dielectric substrate layers, said plurality of layers comprising a first dielectric layer having a first and a second planar surface; a first coupling line comprising a spiral winding that is positioned adjacent the first planar surface; a second coupling line comprising a spiral winding that is positioned adjacent the second planar surface to effect electromagnetic coupling with the spiral winding of the first coupling line; a plurality of groundplanes positioned at other planar surfaces between ones of the other dielectric layers to effect signal isolation of the first and second coupling lines; and a first pair of conductive vias passing from an exterior surface of the coupler through at leant one of the dielectric layers to the first coupling line and a second pair of conductive vias passing from an exterior surface of the coupler through at least one of the dielectric layers to the second coupling line, said first and second pair of conductive vias comprising a same material composition as comprises said conducting lines and providing for signal coupling to signal paths external to the microwave coupler.