| 摘要 |
PROBLEM TO BE SOLVED: To provide a multi-stage integrated power amplifier structure that improves amplifier efficiency and linearity. SOLUTION: The integrated power amplifier structure comprises a matched filter (6) including integrated capacitance, namely branched capacitance (13) and inductance (12) which performs impedance conversion between an input transistor (1) and an output transistor (2). The integrated power amplifier structure is adapted to form the inductance (12) of the matched filter (6) as a microstrip conductor. Thus, a linearity coefficient of the inductance (12) is remarkably increased, and the linearity and efficiency of the integrated power amplifier structure are improved. This configuration particularly has an advantage of being used in an integrated transmission structure. COPYRIGHT: (C)2005,JPO&NCIPI
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