Product features

• Microwave module is using Doppler Radar, Doppler Radar) principles of design of microwave detector, moving object is mainly used in automatic door control switch, safety guard system, ATM cash machine automatic video control system, automatic train signal etc. This kind of detection sensors as compared with ordinary infrared lamp sensor has the following advantages: 1, non-contact detection; 2, not affected by temperature, humidity, noise, air, dust, lighting, etc., suitable for harsh environment; 3, radio frequency interference resistance ability; 4, the output power is small, no harm to human body; 5, detection range of distance: more than 20 meters.
• Doppler's principle introduction: doppler theory is based on time, when radio waves travel in encountered in the process of the object, the waves will be reflected, and the frequency of the reflected wave will change with met the moving state of the object. If radio waves hit the location of the object is fixed, so the frequency of the reflected wave and transmitted wave frequency should be equal. If an object moves in the direction of the launch, the reflected wave will be compressed, implies that the frequency of the reflected wave will increase; Whereas the frequency of the reflected wave will be reduced accordingly.
• Designed according to the principle of doppler microwave detector by medium droz microwave FET oscillation source (10.525 GHz), power divider, transmitting antenna and receiving antenna, mixer, detector and other circuit components (figure 2). Transmitting antenna directional emit microwaves, outward encounters when the object is reflected, the reflected wave is receiving antenna, then to the mixer and the oscillation wave mixing, the mixing, after the detection of low frequency signal reflects the moving object
• A long, size: 65 mm X 60 mm X 10 mm wide
• Second, the main chip: microwave sensor
• Three, working voltage: DC 9 v and 24 v
• Four, features:
• Launch:
• 1 transmitting frequency: 1.2 GHz
• 2 set frequency accuracy: 3 MHZ
• 3 the output power (minimum) : 13 DBM EIRP
• 4 working voltage: DC 9 v and 24 v
• 5 working current (the CW) : 6-10 ma
• 6 output mode: NPN negative trigger mode
• 7 detection range: 0-3 meters
• Detection of microwave band 8: L
• Weight: g (line)
• Size: 65 mm * 60 mm * 10 mm (L * W * H)
• Product use: is suitable for the detection of moving objects are used in buildings, community channel, car interior, where various kinds of shops such as unattended.

Package Included

• 1pcs x Sensor module