It's just strips of thin metal and thin 'plastic', insanely cheap to produce and replace if they get damaged. Dishes are also fairly easy to damage, especially

It's just strips of thin metal and thin 'plastic', insanely cheap to produce and replace if they get damaged. Dishes are also fairly easy to damage, especially if they're torn down and moved. That said, what's shown isn't 100% of the antennae, you need a ground plane disc that the helix is attached to and acts as a reflector.