DOHERTY AMPLIFIER WITH SMALLER SIZE AND EXTENDED BANDWIDTH

摘要

A small Doherty amplifier with an extended bandwidth according to embodiments of the present invention comprises a main amplifying unit; an auxiliary amplifying unit; a load impedance modulating unit which is connected between output nodes of each of the main amplifying unit and the auxiliary amplifying unit to provide the main amplifying unit with load impedance modulated according to the operation of the auxiliary amplifying unit; and a harmonic control matching circuit unit which performs impedance matching of a reference frequency and at least one harmonic component of a signal component in the output nodes of the auxiliary amplifying unit.