| 摘要 |
According to one embodiment, a Doherty amplifier includes: a distributor which distributes a high-frequency signal inputted into two; a carrier amplifier which amplifies one output signal from the distributor; a first filter circuit through which an all-frequency-range component of an amplified signal from the carrier amplifier passes, and which shifts a phase of the amplified signal; a second filter circuit through which an all-frequency-range component of another output signal from the distributor passes, and which shifts a phase of the another output signal, a peak amplifier which amplifies an output signal from the second filter circuit; and a combiner which combines an amplified signal from the peak amplifier and an output signal from the first filter circuit. At least one of the first filter circuit and the second filter circuit is constituted by lumped-parameter elements.
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