Millimeter wave (mmWave) radar is a radar technology that uses electromagnetic waves in the millimeter wave frequency range (30 GHz to 300 GHz) to detect and track objects. This technology is primarily used for various applications such as automotive radar, security surveillance, and industrial sensing. MmWave radar offers several advantages over traditional radar systems, including higher resolution and accuracy, smaller antenna size, and improved performance in adverse weather conditions. This technology has the potential to enable advanced driver assistance systems (ADAS), autonomous vehicles, and smart infrastructure for smart cities. Overall, mmWave radar is a promising research area with significant potential for advancements in various industries, including transportation, security, and manufacturing.