Compact load network for doherty power amplifier using lumped components

A compact load network for a Doherty power amplifier, comprising:

• a first inductor configured such that one terminal thereof is connected to a drain voltage terminal and a remaining terminal thereof is connected in parallel to an output terminal of a first transistor;
• second inductors each configured such that one terminal thereof is connected to a drain voltage terminal and a remaining terminal thereof is connected in parallel to an output terminal of a corresponding one of second transistors;
• a series capacitor connected in series between the output terminal of the first transistor and an output terminal of an adjacent one of the second transistors;
• and
• a filter unit connected between output terminals of the second transistors and a signal output terminal.

A compact load network for a Doherty power amplifier, comprising:

• a first inductor configured such that one terminal thereof is connected to a drain voltage terminal and a remaining terminal thereof is connected in parallel to an output terminal of a first transistor;
• a second inductor configured such that one terminal thereof is connected to a drain voltage terminal and a remaining terminal thereof is connected in parallel to an output terminal of any one of second transistors;
• a series capacitor connected in series between the output terminal of the first transistor and an output terminal of an adjacent one of the second transistors;
• and
• a filter unit connected between output terminals of the second transistors and a signal output terminal.