mmWave radar sensors are advanced sensing technologies developed by various companies worldwide, including Texas Instruments (USA), Infineon Technologies (Germany), and NXP Semiconductors (Netherlands). These sensors operate in the millimeter-wave frequency range (30-300 GHz), offering high precision for applications in automotive, industrial automation, healthcare, and smart infrastructure. Key products include short-range radar (SRR) for object detection, long-range radar (LRR) for autonomous vehicles, and biometric sensors for vital sign monitoring. Major brands like TI's IWR series and Infineon's BGT60 series cater to industries requiring reliable, non-contact sensing solutions.