A printed circuit balanced to unbalanced (balun) transformer. The balun includes strip circuitry having first, second and third conductors. The first conductor provides a primary inductor of the transformer. The primary inductor has a first electrode adapted for coupling to an unbalanced transmission line and a second electrode electrically connected to the ground plane conductor. The second conductor provides a first secondary inductor of the transformer. The first secondary inductor is inductively coupled to a first portion of the primary inductor. A first electrode of the first secondary inductor is electrically connected to the ground plane conductor and a second electrode of the first primary inductor coupled to a first of a pair of output ports. The conductor provides a second secondary inductor of the transformer. The second secondary inductor is inductively coupled to a second portion of the primary inductor. A first electrode of the second secondary inductor is electrically connected to the ground plane conductor and a second electrode of the second secondary inductor is coupled to a second of the pair of output ports.