Outer Space, Indoors

摘要

Moe than 1,000 working satellites orbit Earth. As space becomes in-creasingly crowded, there's a greater chance that the satellites' radio signals could overlap. To avoid that problem, which disrupts communications, satellite antennas must transmit only within a narrow frequency band. The radio-frequency anechoic chamber at the Technical University of Denmark (DTU) is one of the best places in the world to accurately calibrate antennas.