| 摘要 |
A high-frequency power amplifier capable of considerably improving the power amplification efficiency (eta). This high-frequency power amplifier 10 comprises an amplifying element 11, an input-side matching circuit 12, and an output-side matching circuit 13, and further has a current absorbing unit 20. This current absorbing unit 20 absorbs the current of a higher-harmonic frequency current contained in a signal of a fundamental wave at which the amplifying element 11 operates. Preferably, this current absorbing unit 20 is comprised of an LC-series resonance circuit 21 having a higher-harmonic frequency as a resonance frequency, and thereby bypasses the above current to the earth.
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