Patent ID: 9231558
Filing Date: 2016-01-05
CPC Classification: H03F,H03H

Claim Text:
1. A high frequency power amplifier comprising: an amplification element amplifying a high frequency signal; a duplexer to which an output signal of the amplification element is input, wherein the duplexer passes a signal of a certain frequency band and attenuates signals of other frequency bands; first and second matching circuits connected in series, wherein an input of the first matching circuit is connected at a first junction point to an output of the amplification element, the first and second matching circuits are connected to each other at a second junction point, and an output of the second matching circuit is connected at a third junction point to an input of the duplexer; a first external terminal connected to the second junction point, between the first and second matching circuits; and a first passive element connected between the first external terminal and a grounding point, wherein