Digital Microwave Sensor (Motion Detection)

INTRODUCTION

The microwave sensor applies the Doppler effect to detect moving objects using microwaves. This differs from the method used by a regular infrared (IR) sensor as microwave is sensitive to a variety of objects that are microwave-reflective, and its sensor readings are not affected by the ambient temperature.

The microwave detection method has the following advantages compared to other methods:

1. Non-contact detection
2. Readings not affected by temperature, humidity, noise, air, dust or light - suitable for harsh environments
3. Strong resistance to radio frequency interference
4. Low output, unharmful to human
5. Wide detection range and high velocity
6. Supports non-living object detection

APPLICATIONS

The microwave sensor can be useful together with other sensors to enhance its measurement accuracy.

SPECIFICATION

• Working Voltage: 5V + 0.25V
• Working Current (CW): 60mA max., 37mA typical
• Interface: Gravity 3-Pin interface（Digital）
• Size: 48.5x63mm
• Emission parameters:
  • Detection Distance: 2-16M continuously adjustable
  • Emission Frequency: 10.525 GHz
  • Precision Frequency Setting: 3MHz
  • Output Power (minimum): 13dBm EIRP
  • Harmonic Emission: < -10dBm
  • Average Current (5%DC): 2mA typ.
  • Pulse Width (Min.): 5uSec
  • Load Cycle (Min.): 1%
• Reception Parameters:
  • Sensitivity:(10dB S/N ratio) 3Hz to 80Hz
  • Bandwidth: -86dBm
  • 3Hz to 80Hz Bandwidth Clutter: 10uV
  • Antenna Gain: 8dBi
  • Vertical 3dB Beam Width: 36 degrees
  • Level 3dB Beam Width: 72 degrees