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    • 15. 发明授权
    • Radio frequency power amplifier
    • 射频功率放大器
    • US07123087B2
    • 2006-10-17
    • US11230467
    • 2005-09-21
    • Masami OhnishiHidetoshi MatsumotoTomonori TanoueOsamu KagayaKenji Sekine
    • Masami OhnishiHidetoshi MatsumotoTomonori TanoueOsamu KagayaKenji Sekine
    • H03F3/68
    • H03F1/56H03F1/0277H03F1/565H03F3/602H03F3/72H03F2203/7209
    • The present invention provides a radio frequency power amplifier which may not introduce radio frequency loss during switching power amplifier units between high and low output power levels. By connecting a first-stage matching network M12 and first-stage matching network M13 to respective output nodes of a power amplifier unit A11 and power amplifier unit A12 that either one operate by switching, connecting the output nodes of the first-stage matching network M12 and M13 in parallel, connecting a last-stage matching network M11 between the junction of M12 and M13 and the output terminal OUT, the first-stage matching networks M12, M13, and last-stage matching network M11 are formed, for both power amplifier units A11 and A12, so that impedance matching is established between the output terminal OUT and the power amplifier unit in operation when one unit is in operation the other is in stop of operation. The present invention allows switching from one power amplifier unit to the other without the need of a radio frequency switch.
    • 本发明提供一种射频功率放大器,其可以在高输出功率级和低输出功率级之间的开关功率放大器单元期间不会引入射频损耗。 通过将第一级匹配网络M 12和第一级匹配网络M 13连接到功率放大器单元A11和功率放大器单元A12的相应输出节点,功率放大器单元A 11和功率放大器单元A 12通过切换操作,连接第一级匹配网络 在M12和M13的连接点与输出端子OUT,第一级匹配网络M 12,M 13以及最后一级匹配网络M12之间连接最后一级匹配网络M 11, 对于功率放大器单元A 11和A 12两者形成级匹配网络M 11,使得当一个单元在操作中另一个处于停止操作时在输出端子OUT和功率放大器单元之间建立阻抗匹配 。 本发明允许从一个功率放大器单元切换到另一个,而不需要射频切换。