Microwave radar sensor circuit for intelligent closestool

The utility model discloses a microwave radar sensor circuit for an intelligent closestool. The microwave radar sensor circuit comprises an MCU module, a radio frequency module electrically connectedwith the MCU module, a signal processing module and a power supply module used for supplying power to a sensor. The radio frequency module is also electrically connected with the signal processing module. The radio frequency module comprises a radio frequency chip, a transmitting antenna and a receiving antenna, wherein the transmitting antenna and the receiving antenna are electrically connectedwith the radio frequency chip. According to the utility model, the radio frequency module receives the second microwave signal reflected from the target and mixes the second microwave signal with thefirst microwave signal to form the intermediate frequency signal, and then the MCU module extracts the position information of the target from the intermediate frequency signal processed by the signalprocessing module, thereby