Built-in biasing circuit based terahertz frequency multiplier

The invention discloses a built-in biasing circuit based terahertz frequency multiplier. The frequency multiplier comprises an upper cavity and a lower cavity; a first input wave guide channel, a first main channel, a first biasing channel, a second biasing channel, a first resistor positioning channel and a first output wave guide channel are arranged in the upper cavity; all channels in the upper cavity are concave grooves formed in the cavity; the tail end of the first input wave guide is connected with the first main channel; the other end of the first main channel is connected with the first output wave guide; a second input wave guide channel, a second main channel, a third biasing channel, a fourth biasing channel, a second resistor positioning channel and a second output wave guide channel are arranged in the lower cavity; a first quartz circuit is mounted in the third biasing channel; a second quartz circuit is mounted in the second main channel; a chip resistor is mounted in the second resistor positioning channel; the surface of the upper cavity is closely clung to the surface of the lower cavity.