Active Infrared Sensors differ from PIRs in that they emit their own infrared signal. This signal bounces off objects and returns to the sensor, allowing it to calculate distances or detect ...

Passive infrared (PIR), or pyroelectric PIR sensors as they are also called, detect infrared (heat) radiation in the range of 0.7 µm to 50 µm. The radiated heat can come from humans, animals, ...

What Is The Difference Between Active And Passive Rfid Tags? RFID tags with an active transmitter and their own power supply (usually a battery) are known as active tags. Tags with a passive power ...

Let’s set the record straight in terms of who is who in the 5G antenna designs. It starts with the difference between passive and active antenna domains. In a conventional antenna system, a single ...