Doppler radar is the Doppler effects
radar positioning, velocity, ranging work. Is the so-called Doppler effect, when the vibration source and the observer of the sound, light, radio waves and other relative movement of the relative velocity V, the frequency emitted by the viewer received the vibration frequency of the vibration source is different. Austrian scientists Doppler first discovered this
phenomenon, it is called the Doppler effect. Formed by the frequency change by Doppler
effects
is called the Doppler frequency shift, which is proportional to the relative velocity V is inversely proportional with the frequency of the vibration.
Used in
Microwave Sensor Switch:
Microwave switch for active sensors, sensor emitting high-frequency electromagnetic waves (5.8GHz) and receives their echo within the echo of this sensor detects changes even the tiny moving within its detection range. The microprocessor then trigger "point lighting" instruction. Signals through a door, a glass plate, and the thin walls are likely to be detected.
Microwave Doppler principle
IEEE
opening band under the ISM license-free use
low power consumption, high noise immunity, high-precision
can be used in harsh working environments
Applies to
microwave sensor switch
,intelligent security
and
intelligent lighting system
Parameter
Min
Type
Max
Units
Transmitting frequency
5.725
5.8
5.850
GHz
EIRP
0.10
0.12
0.14
mW
Operating Temperature
-25
25
75
ºC
Supply Voltage
4.75
5.00
5.25
DC V
Operating current
18
21
23
mA
Size(L*W*H)
/
34.25*24.35*8
/
mm
Antenna length
10
14
18
mm
Weight
/
8
/
g