Patent ID: 6329877
Filing Date: 2001-12-11
Classification: H03F

Abstract:
A power amplifier, comprising:a frequency insensitive in-phase power splitter for receiving an input signal and generating first and second split signals;a first amplifier capable of operating in a first mode of operation, the first amplifier adapted to receive the first split signal and produce a first amplifier output signal;a first transmission line having a first characteristic impedance and a first phase, the first transmission line adapted to receive the first amplifier output signal at a first end thereof and transmit the first amplifier output signal thereacross to a second end, the first amplifier and first transmission line collectively resulting in a first transmission line output signal having a first predetermined static phase;a second amplifier capable of operating in a second mode of operation, the second mode of operation differing from the first mode of operation, the second amplifier adapted to receive the second split signal as an input and produce a second amplifier output signal; anda second transmission line having a second characteristic impedance and a second phase, a first end of the second transmission line coupled to the second end of the first transmission line, the first end of the second transmission line also coupled to receive the second amplifier output signal, the second transmission line adapted to transmit signals provided at the first end to a second end thereof, the second amplifier and second transmission line collectively resulting in a second transmission line output signal having a second predetermined static phase in-phase with the first transmission line output signal.