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RADAR 101

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RADAR is an acronym, which stands for Radio Detection And Ranging. A RADAR is a remote sensor that emits electromagnetic waves in order to measure reflections for detection purposes. RADAR can be used to determine

  • Presence
  • Location
  • Motion

How it Works

The Doppler Principle - The Doppler Effect is a frequency shift that results from relative motion between a frequency source and a listener. If the source and the listener are not moving with respect to each other, then no Doppler shift occurs. If the source and the listener are moving towards each other, the listener will perceive a higher frequency. The faster the speed of the approach, the higher the return frequency will be. If the source and the listener are moving away from each other, the listener will perceive a lower frequency. The faster the speed of separation, the lower the return frequency will be. The Doppler shift is directly proportional to the speed between the source and the listener, the frequency of the source, and the speed the wave travels.

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