RF & Microwave Sensor based Human Detection Behind the Wall

It detects human present behind the wall using RF transmitter and receiver and Microwave sensor by sending signals and if human is present it displays the output

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output
Hardware setup

RF transmitter sends a 433 MHz signal through the wall. RF receiver captures the transmitted signal. If no human is present the RF signal remains stable. If a human is present the human body absorbs and reflects RF waves, causing signal variation. A microwave Doppler sensor detects motion behind the wall by sensing frequency changes in reflected microwaves. The Arduino analyzes inputs from both the RF receiver and the microwave sensor to confirm human presence. Upon detection, the Arduino activates the LED,and LCD display to indicate “Human Detected.”