Passive IR (PIR) sensors are excellent devices for wireless sensor networks (WSN), being low-cost, low-power, and presenting a small form factor. PIR sensors are widely used as a simple, but reliable, ...

This paper focuses on infrared (IR) sensors based on merging radiofrequency (RF) aluminum nitride (AIN) contour mode resonators (CMRs) integrated with spectrally-selective IR metasurfaces. Thousands ...

These advanced sensors, powered by IR emitters and receivers, detect nearby objects like your hand or ear to trigger smart responses. Today's devices use them for gesture recognition like skipping ...