Systems and methods related to linear and efficient broadband power amplifiers

A power amplifier module comprising:

• a packaging substrate configured to receive a plurality of components;
• a power amplifier (PA) system implemented on the packaging substrate, the PA system including an input circuit configured to receive the RF signal and split the RF signal into a first portion and a second portion, the PA system further including a Doherty amplifier circuit having a carrier amplification path coupled to the input circuit to receive the first portion and a peaking amplification path coupled to the input circuit to receive the second, the PA system further including an output circuit coupled to the Doherty amplifier circuit, the output circuit including a balance to unbalance (BALUN) circuit, the balance to unbalance circuit including an LC balance to unbalance transformer, configured to combine outputs of the carrier amplification path and the peaking amplification path to yield an amplified RF signal;
• and
• a plurality of connectors configured to provide electrical connections between the PA system and the packaging substrate.

A wireless device comprising:

• a transceiver configured to generate a radio-frequency (RF) signal;
• a power amplifier (PA) module in communication with the transceiver, the PA module including an input circuit configured to receive the RF signal and split the RF signal into a first portion and a second portion, the PA module further including a Doherty amplifier circuit having a carrier amplification path coupled to the input circuit to receive the first portion and a peaking amplification path coupled to the input circuit to receive the second portion, the PA module further including an output circuit coupled to the Doherty amplifier circuit, the output circuit including a balance to unbalance (BALUN) circuit, the balance to unbalance circuit including an LC balance to unbalance transformer, configured to combine outputs of the carrier amplification path and the peaking amplification path to yield an amplified RF signal;
• and
• an antenna in communication with the PA module, the antenna configured to facilitate transmission of the amplified RF signal.