Doherty combiner

A Doherty combiner comprising:

• a phase shift section connected between one end of a carrier amplifier and a common node so as to change a phase of an RF signal output from the carrier amplifier;
• a matching section connected between the common node and an output terminal of a Doherty power amplifier so as to impedance-match an output of the Doherty power amplifier;
• and
• a bandwidth improvement section connected between one end of a peaking amplifier and the common node so as to change at least one of a phase bandwidth and a magnitude bandwidth of the Doherty power amplifier,
• wherein the common node indicates one point where one end of the phase shift section, one end of the matching section, and one end of the bandwidth improvement section meet one another.