Quadrature modulator

A quadrature modulator comprising:

• a first switched capacitor power amplifier that amplifies a first high-frequency signal having a first phase according to a first data input;
• a second switched capacitor power amplifier that amplifies a second high-frequency signal having a second phase different from the first phase according to a second data input;
• a first combiner which comprises at least one pair of winding wires that are magnetically coupled to each other, one winding wire in one pair being disposed on a primary side to which the amplified first high-frequency signal and the amplified second high-frequency signal are separately input and the other winding wire in the one pair being disposed on a secondary side, the first combiner combining the input amplified first high-frequency signal and the input amplified second high-frequency signal to generate a quadrature modulation signal from the secondary side;
• a first inductor disposed between the first switched capacitor power amplifier and the primary side of the first combiner;
• and
• a second inductor disposed between the second switched capacitor power amplifier and the primary side of the first combiner.