Furthermore, just as 3D printing enables fabrication of structures ... This is a low-profile high-gain antenna that’s a good fit for remote sensing and communications, such as for CubeSats ...

And all that’s needed to snoop in on them is a cheap ham radio and something like this simple and portable satcom antenna ... itself was adapted to use 3D-printed parts in a German blog post ...

that with rapid prototyping and production capabilities of 3D printing technology, NASA can create high-performance communication antennas tailored to mission specifications faster than ever before.