High-frequency-band terahertz receiving front-end circuit

The utility model discloses a high-frequency-band terahertz receiving front-end circuit, the circuit structure of the terahertz receiving front end comprises a frequency mixing structure, a frequencymultiplication structure and an output end DC/IF bonding pad, and the frequency multiplier structure comprises a local oscillator input probe, a first low pass filter, a first transmission line and anonlinear Schottky diode pair structure which are connected in sequence; the frequency mixing structure comprises a radio frequency receiving end, a Schottky diode, a matching circuit and a second low-pass filter, the radio frequency receiving end receives external terahertz signals, and the output end DC/IF bonding pad is fed with direct current bias; local oscillation signals subjected to frequency multiplication of the single-stage nine-frequency multiplication structure are subjected to frequency mixing with received terahertz signals through a frequency mixing structure through a matchingcircuit, are finally filte