Patent ID: 7800442

Claim:
A composite power amplifying system for amplifying a signal according to Linear Amplification using Nonlinear Components (LINC) or Chireix outphasing techniques, comprising two balanced power amplifiers, each having two outputs, wherein a first output of the first power amplifier is connected to a first input of a first balun arrangement and the second output of the first power amplifier is connected to a second input of the first balun arrangement, and a first output of the second power amplifier is connected to a first input of a second balun arrangement, and a second output of the second power amplifier is connected to a second input of the second balun arrangement, wherein a single-ended output of the first balun arrangement is connected to a first transmission line and a second single-ended output of the second balun arrangement is connected to a second transmission line, wherein the first and the second transmission lines are connected to a connection point which is connected to an output load; wherein said first and second balun arrangements each comprise two equivalent and inverting lumped-element balun devices.