Patent ID: 9602068
Date: 2017-03-21
CPC Classifications: H03F

Claim:
1. A high-frequency power amplifier comprising: branch lines that split a signal input from an input terminal into two separate signals to output a separate signal being one of the two separate signals from a first branch terminal, and to output a separate signal being another one of the two separate signals from a second branch terminal; a first amplifier element that amplifies the separate signal output from the first branch terminal of the branch lines; a second amplifier element that amplifies the separate signal output from the second branch terminal of the branch lines; combining lines that combine the amplified separate signal obtained by the first amplifier element and the amplified separate signal obtained by the second amplifier element, thereby to output to an output terminal a combined signal including two separate signals; and one or more tuned lines each being comprised of a line having a length of n times a wavelength of a fundamental wave of the signal input from the input terminal where n is a natural number, wherein said one or more tuned lines are connected between at least one terminal pair of a pair of the first and second branch terminals of the branch lines and a pair of first and second combining terminals of the combining lines which receive the respective amplified separate signals obtained by the first and second amplifier elements, thereby to reduce a non-uniform voltage distribution occurring between said at least one terminal pair.