These days, affordable software defined radios (SDRs) have made huge swaths of the spectrum ... But even the best SDR is constrained by the antenna it’s connected to, and that’s where it ...

The boom's in the range of 80 to 90 feet (long). So it's a big antenna." It takes the shape of a parabolic dish when fully deployed, "and that reflects the energy up to the rest of the satellite ...

A parabolic antenna ... In this way relatively huge reflectors can be built in space, with easy folding and very little weight. The linked article describes the antenna as spherical and its ...