Antennae, and the front end that feeds into the SDR. The lower the frequency, the bigger the antennae need to be (more or less) so a 2.4gig array would most li

Antennae, and the front end that feeds into the SDR. The lower the frequency, the bigger the antennae need to be (more or less) so a 2.4gig array would most likely be 2x the size of a 6ghz array.