Matching network and power amplifier circuit

A matching network of a power amplifier circuit that receives, at an input node, a high-frequency signal and that outputs, to an output node, a signal obtained by amplifying a power of the high-frequency signal with a differential amplifier, the matching network comprising:

• an input-side winding connected between differential outputs of the differential amplifier;
• an output-side winding that is coupled to the input-side winding via an electromagnetic field, wherein a first end of the output-side winding is connected to a reference potential;
• a first LC series resonant circuit connected in parallel with the input-side winding, the first LC series resonant circuit comprising a first capacitive element and a first inductive element connected in series with each other;
• and
• a second LC series resonant circuit connected in parallel with the output-side winding, the second LC series resonant circuit comprising a second capacitive element and a second inductive element connected in series with each other.