| 摘要 |
A radio frequency power amplifier (16) for use in at least 2 frequency bands, comprises a power amplifier (32) having a passive adjustable input matching network (30), a passive variable output power matching network (34, 36) and a source (48) of tuning voltages for adjusting the input and output networks so that the power amplifier functions as a narrowband amplifier in a predetermined one of the at least 2 frequency bands. The source of tuning voltages may comprise a look-up table.
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