April 3, 2023 AFRL conducts first flight experiments for communications in terahertz band Air Force Research Laboratory, or AFRL, researchers successfully conducted flight experiments Dec. 2- 6, 2022, in Rome, New York to prove the viability of communications at radio frequencies above 300 gigahertz, or GHz, known in research communities as terahertz, or THz, band. Over three days of