EurekAlert  February 18, 2022 Researchers at MIT have built the most precise, electronically steerable, terahertz antenna array, called “reflectarray” which contains nearly 10,000 antennas onto a device the size of a credit card. It can precisely focus a beam of terahertz energy on a tiny area and control it rapidly with no moving parts. The researchers demonstrated the device by generating 3D depth images with military-grade resolution and twice the angular resolution of those produced by a large radars. The new phase shifter design consumes no power at all. The reflectarray uses one main source of energy to fire terahertz […]