DUAL-BAND DOHERTY COMBINER/IMPEDANCE TRANSFORMER CIRCUIT AND DOHERTY POWER AMPLIFIER INCLUDING THE SAME

摘要

A dual band Doherty component circuit of a dual band Doherty amplifier, which is configured to operate at first and second operating frequencies, includes a Doherty combiner circuit, the Doherty combiner circuit including, a first input node configured to receive a first output, a combining node configured to receive a second output and combine the first output with the second output, the first output being an output of a main amplifier stage of the Doherty amplifier, the second output being an output of a peak amplifier stage of the Doherty amplifier; and a broadband impedance transformer circuit including, first, second, and third lines, the first and second lines being electrically coupled to one another, the first and third lines being connected to an input of the impedance transformer circuit, the second line being connected to an output of the impedance transformer circuit.