User's Guide

AT58L4M32-2020 Motion sensor
Version 1.2
Page 8
Detection Pattern
The sensing sensitivity of radar sensor can be configured by MCU, and its limit sensing
distance is 20 meters. The actual sensing distance can be adjusted according to the needs.
The following is the schematic diagram of radar detection range in case of high hanging. If
the sensitivity is set higher, the detection range will be correspondingly larger. In the figure,
the dark area is the high sensitivity area, which can be fully detected, while the light area is
the low sensitivity detection area, which can basically detect objects.
Figure5 AT58L4M32-2020 Detection Pattern
Precautions

During installation, the front of the antenna shall be free of metal shell or parts to avoid signal
shielding. Plastic or glass and other materials are allowed, but these materials shall not be
close to the front of the antenna；

Try to avoid pointing the radar antenna at the large metal equipment or pipeline, etc；

When multiple radar modules are installed, the antennas of each radar module shall be parallel to
each other as much as possible to avoid direct radiation between the antennas, and the distance
between the modules shall be more than 1m；

The radar sensor should avoid facing the AC driving power supply and keep away from the
rectifier bridge of the driving power supply as far as possible to avoid the interference of the
power frequency；

The power supply driving capacity of the radar module needs to be greater than 30mA, otherwise
the sensor will work abnormally.