Key Feature
Dual 2 patch antenna
Operating frequency 8.5GHz
10dBm output power
50m detection distance
Function Introduction
TRW-10GHz is high frequency radar transceiver module. It is using Doppler
Effect Theory to detect frequency change when person or objects move. When
it finish signal detect, it will output to MCU to detect or OP AMP voltage
comparator to deal with signal strength.
Performance of this module is different from PIR (Passive infrared sensor),
PIR distance will be very short because of temperature changes.
More stable, long distance, wide angle, high sensitivity, cost is lower than PIR
and easy for using.
It can use in various products. Whatever indoor or outdoor, you can design
different products to fit difference place and environment.
Using this module, you don’t need to waste energy, save electricity fees and
extended product life to let energy-saving and minus carbon purpose coming
true.
It can widely use in automatic door opener, security system, automatic light
sensor, traffic speed searching, traffic light signal control, office power
management, intelligent control, medical probe and so on.
Doppler Effect
The Doppler Effect is something which occurs likes sound or light moves
relative to an observer. The object, observer, or bo th can move, causing an
apparent change in the frequency of the wavelengths being emitted by the
object.
The Doppler Effect explains why a rude driver's car horn appears to change in
frequency as he or she zooms by while leaning on it, and an understanding of
the Doppler Effect can help scientists make a variety of observations about the
world around them.
When an object approaches an observer, the wavelengths are compressed,
causing the frequency to increase, and as the object moves away, the
wavelengths spread out, causing a corresponding decrease in frequency.
When an object is approaching an observer, the frequency of the wavelengths
appears to increase, in a phenomenon known as blue shifting. As the object
moves away from the observer, the frequency seems to decrease from the
observer's perspective, in a situation known as red shifting. Another example
commonly used to illustrate the Doppler Effect is the siren of an emergency
http://www.wenshing.com.tw ; http://www.rf.net.tw
T RW-10GHz Datasheet P.2
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