Abstract: Disclosed is a 3-way Doherty power amplifier using a driving amplifier in which driving amplifiers are connected to the front stages of a carrier amplifier and a peaking amplifier, respectively, so as to obtain a high gain and a high efficiency. To this end, the Doherty power amplifier includes: a hybrid power distributor for distributing an input signal into first and second path units; and a driving amplifier for receiving a signal outputted from the hybrid power distributor and controlling the driving of a carrier amplifier, a first peaking amplifier, and a second peaking amplifier, wherein: the carrier amplifier, the first peaking amplifier, and the second peaking amplifier are connected to a rear stage of the driving amplifier, respectively; the first path unit generates a high efficiency at a low input power; and the second path unit maintains a high efficiency and gain in a high output range.

Abstract: Provided is a distributed Doherty power amplifier exhibiting high efficiency and linearity at a wide range of bandwidths, the distributed Doherty power amplifier including a first amplifier; a second amplifier, which is connected to the first amplifier in parallel; a first shifting unit, which is interconnected between the input of the first amplifier and the input of the second amplifier and inverses the phase of the input of the second amplifier; and a second shifting unit, which is interconnected between the output of the first amplifier and the output of the second amplifier and inverses the phase of the output of the second amplifier, wherein the first amplifier and the second amplifier are Doherty power amplifiers, and each of the Doherty power amplifiers includes a carrier amplifier and a peaking amplifier, which are connected in parallel.

Abstract: Disclosed is a 3-way Doherty power amplifier using a driving amplifier in which driving amplifiers are connected to the front stages of a carrier amplifier and a peaking amplifier, respectively, so as to obtain a high gain and a high efficiency. To this end, the Doherty power amplifier includes: a hybrid power distributor for distributing an input signal into first and second path units; and a driving amplifier for receiving a signal outputted from the hybrid power distributor and controlling the driving of a carrier amplifier, a first peaking amplifier, and a second peaking amplifier, wherein: the carrier amplifier, the first peaking amplifier, and the second peaking amplifier are connected to a rear stage of the driving amplifier, respectively; the first path unit generates a high efficiency at a low input power; and the second path unit maintains a high efficiency and gain in a high output range.

Abstract: Provided is a distributed Doherty power amplifier exhibiting high efficiency and linearity at a wide range of bandwidths, the distributed Doherty power amplifier including a first amplifier; a second amplifier, which is connected to the first amplifier in parallel; a first shifting unit, which is interconnected between the input of the first amplifier and the input of the second amplifier and inverses the phase of the input of the second amplifier; and a second shifting unit, which is interconnected between the output of the first amplifier and the output of the second amplifier and inverses the phase of the output of the second amplifier, wherein the first amplifier and the second amplifier are Doherty power amplifiers, and each of the Doherty power amplifiers includes a carrier amplifier and a peaking amplifier, which are connected in parallel.