Balloons In Space are a good idea, and an antenna is not the only concept they've been proposed for: https://www.projectrho.com/public_html/rocket/infrastructu

Balloons In Space are a good idea, and an antenna is not the only concept they've been proposed for: https://www.projectrho.com/public_html/rocket/infrastructure.php#id--Solar_Power_Stations https://www.projectrho.com/public_html/rocket/infrastructure... https://www.projectrho.com/public_html/rocket/enginelist.php#solarmoth https://www.projectrho.com/public_html/rocket/enginelist.php... Even at large volumes, you get a ton of surface area for the mass, as well as a good spherical or parabolic shape for reflectors.