Technology
High Electron Mobility Transistors for Millimeter-Wave Radar
Quick fact
HEMTs can switch at speeds exceeding 100 GHz, making them essential for the millimeter-wave radars used in autonomous vehicles and high-resolution security scanners.
Why this is interesting
Your car’s radar can detect a pedestrian at 200 meters, yet the transistor inside it is smaller than a grain of rice. How does such a tiny device generate the super-fast signals that make this possible?