US 12,407,304 B2
Power amplifier module
Masatoshi Hase, Kyoto (JP); and Hitoshi Akamine, Kyoto (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto (JP)
Filed on Jul. 15, 2021, as Appl. No. 17/376,780.
Claims priority of application No. 2020-122668 (JP), filed on Jul. 17, 2020.
Prior Publication US 2022/0021350 A1, Jan. 20, 2022
Int. Cl. H03F 1/42 (2006.01); H03F 3/24 (2006.01)
CPC H03F 1/42 (2013.01) [H03F 3/245 (2013.01); H03F 2200/171 (2013.01); H03F 2200/451 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A power amplifier module comprising:
a first amplifier configured to amplify a power level of a first input signal in a predetermined frequency band and output a first signal of a first power level;
a first impedance transformer connected to the first amplifier and including a transmission line transformer;
a second amplifier configured to amplify a power level of a second input signal in the predetermined frequency band and output a second signal of the first power level;
a second impedance transformer connected to the second amplifier and including a transmission line transformer;
a combiner configured to combine the first signal inputted through the first impedance transformer and the second signal inputted through the second impedance transformer into an output signal of a second power level larger than the first power level, the combiner including a transmission line transformer; and
an antenna switch,
wherein the antenna switch includes:
a first terminal to which the first signal is inputted through the first impedance transformer,
a second terminal to which the second signal is inputted through the second impedance transformer,
a first output terminal configured to output the first signal to a first antenna,
a second output terminal configured to output the second signal to a second antenna different from the first antenna, and
third output terminals configured to output the first signal and the second signal to the combiner.