5G millimeter wave dual-band dual-mode mixer and wireless communication terminal

A 5G millimeter wave dual-band dual-mode mixer comprising:

• a first MOSFET;
• the first MOSFET is connected to a source of a second MOSFET and a source of a third MOSFET and a drain of a fourth MOSFET through its drain;
• the second MOSFET is connected to one end of a first capacitor through its gate, with the other end of the first capacitor connected to a drain of the third MOSFET;
• the third MOSFET is connected to one end of a second capacitor through its gate, with the other end of the second capacitor connected to a drain of the second MOSFET;
• the second MOSFET and the third MOSFET are connected to positive and negative ends of a local oscillator signal through their gates respectively, and the second MOSFET and the third MOSFET are connected to two ports of a primary coil of a transformer through their drains respectively;
• the transformer is connected to a Vdd after being cascaded with a first inductor through a center tap of the primary coil, wherein a center tap of a secondary coil of the transformer is connected to the ground, and a fifth MOSFET and a sixth MOSFET are connected to two ports of the secondary coil of the transformer through their sources respectively;
• the sixth MOSFET is connected to a bias voltage Vb2 through its gate, and the sixth MOSFET is connected to a drain of an eighth MOSFET through its drain;
• the fifth MOSFET is connected to the bias voltage Vb2 through its gate and to a drain of a seventh MOSFET, and the fifth MOSFET is connected to the gate of the seventh MOSFET and the gate of the eighth MOSFET through its drain;
• the seventh MOSFET and the eighth MOSFET are connected to a Vdd through their sources, respectively;
• the sixth MOSFET is connected to one end of a fourth capacitor through its drain, wherein the other end of the fourth capacitor is connected to a first input end of a single-pole double-throw switch after being cascaded with a second inductor;
• and
• the transformer is connected to one end of a third capacitor through the center tap of the primary coil, wherein the other end of the third capacitor is connected to a second input end of the single-pole double-throw switch and an output end of the single-pole double-throw switch is connected to an IF output port.