| 摘要 |
<p>According to one embodiment, a Doherty amplifier (1) includes: a distributor (11) which distributes a high-frequency signal inputted into two; a carrier amplifier (12) which amplifies one output signal from the distributor (11); a first filter circuit (13) through which an all-frequency-range component of an amplified signal from the carrier amplifier (12) passes, and which shifts a phase of the amplified signal; a second filter circuit (14) through which an all-frequency-range component of another output signal from the distributor (11) passes, and which shifts a phase of the another output signal, a peak amplifier (15) which amplifies an output signal from the second filter circuit (14); and a combiner (16) which combines an amplified signal from the peak amplifier (15) and an output signal from the first filter circuit (13). At least one of the first filter circuit (13) and the second filter circuit (14) is constituted by lumped-parameter elements.</p> |
