| 摘要 |
PROBLEM TO BE SOLVED: To obtain a power synthesis type high-frequency amplifier, capable of attaining characteristics of high output, high efficiency and high gain, even in a condition in which input/output impedance is not open, when a peak power amplifying transistor is off. SOLUTION: A first branched line 3 and a second branched line 4 are connected in parallel between an input-side power-distributing means 1 and an output-side power-distributing means 2, a carrier power amplifying transistor 5 is connected to the line 3, and a peak power amplifying transistor 7 is connected to the line 4. A first 1/4 wavelength line 18 and a first input-matching circuit 19 are connected in series with the input side of the transistor 5. A first output-matching circuit 20 is connected to the output-side of the transistor 5. A second input-matching circuit 21 is connected to the input-side of the transistor 7. A second output-matching circuit 22 and a second 1/4 wavelength line 23 are connected in series with the output-side of the transistor 7. COPYRIGHT: (C)2005,JPO&NCIPI
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