Patent ID: 8594594

Claim:
An apparatus comprising: a plurality of power amplifiers, each power amplifier having an input and an output; a plurality of first transmission lines, wherein the output of each of the plurality of power amplifiers is directly coupled to a first end of a different one or more of the first transmission lines, and wherein a second end of each of the first transmission lines is coupled to an output of a voltage source; a central conductive region, the central conductive region having a node coupled to an antenna terminal; and a plurality of second transmission lines, wherein each of the second transmission lines is coupled to a different output of the plurality of power amplifiers through respective first transmission lines, wherein each of the second transmission lines includes an end electrically coupled to the central conductive region, wherein each power amplifier receives an input signal and produces an output signal, and wherein the output signals of the plurality of power amplifiers are magnetically coupled from the first transmission lines to the second transmission lines and added at the node of the central conductive region.