DOHERTY POWER AMPLIFIER AND THE METHOD OF MODULATING LOAD IMPEDANCE OF THE AMPLIFIER

摘要

The present invention relates to a Doherty power amplifying device capable of improving the efficiency of a high frequency power amplifier, and the Doherty power amplifying device according to an embodiment of the present invention includes an input transformer, a main amplifier, an auxiliary amplifier, an output transformer, and a first 90°. A phase transmission line, a second 90° phase transmission line, and a connection network for shorting output terminals having the same phase of the amplifier may be included.