Hello
I am sorry , I have a wrong when I paste the text.
I want a schematic of rf motion sensor that detect the motion of people in the room , and it's frequency 1 Ghz , and it's range about 3 m .
You are looking for a "Doppler radar motion detector circuit". A shift in receive frequency indicates something in the view of the circuit is moving towards or away. Anything else using radar (like time-of-flight for ranging) is too expensive and difficult.
You can avoid sensor by moving in a perfect circle around the sensor so you are always the same distance from it, but that is very difficult.
But a PIR infrared sensor is much easier. You only need the radar if you want to detect objects that are not warm moving.
"doppler radar motion detector", what if i want to use this detector to determine the position a tracked object using triangulation method. Any suggestion for the rf module to use?
THx in advance