Patent ID: 7592865
Filing Date: 2009-09-22
Classification: H01P,H03F

Abstract:
1. A power amplifier using a power combiner, wherein first and second amplifier units amplify and output radio frequency signals having opposite phases and are respectively connected to one ends of a first transmission line and a second transmission line of a first transmission line transformer, third and fourth amplifier units amplify and output radio frequency signals having opposite phases and are respectively connected to one ends of a third transmission line and a fourth transmission line of a second transmission line transformer, the other ends of the second transmission line of the first transmission line transformer and the third transmission line of the second transmission line transformer are connected to each other so as to be connected to ground, the other end of the first transmission line of the first transmission line transformer is connected to one end of a fifth transmission line of a third transmission line transformer, the other end of the fourth transmission line of the second transmission line transformer is connected to one end of a sixth transmission line of the third transmission line transformer, the fifth transmission line of the third transmission line transformer is connected to ground via an output resistor, and the sixth transmission line of the third transmission line transformer is connected to ground.