| 摘要 |
A power amplifier includes a power distributor for dividing an input signal into a plurality of equally power-distributed signals; a plurality of amplifying elements for amplifying the plurality of equally power-distributed signals divided by the power distributor, respectively; a power coupler for coupling respective output signals of the plurality of amplifying elements; and a variable resistance element provided between nodes having the same phase as each other on power transmission lines in at least one side of each input side and each output side of the plurality of amplifying elements. By the constitution, it is possible to prevent occurrence of a parasitic oscillation and thus contribute to an improvement in yield as a product.
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