US Patent 9071211 Compact doherty combiner

A combiner coupled to output terminals of a Doherty amplifier, the combiner comprising an inverter circuit and a transformer circuit. The inverter circuit comprising at least a first network and a second network, wherein each of the first network and the second network includes lumped elements. The transformer circuit comprising at least a third network and a fourth network, wherein each of the first third and the fourth network includes the lumped elements, wherein the lumped elements are selected from the group of capacitors and inductors.