The largest antenna ever tested in ESA's Hertz radio frequency test chamber is this 5-m diameter transponder antenna, which will operate down on the ground to help calibrate the Biomass mission, which ...
These spiky carbon-impregnated foam pyramids, seen here in ESA's Hertz test chamber, cover the walls of facilities that simulate the endless void of space. This 'anechoic' foam absorbs radio signals, ...