I'll be honest, I didn't exactly proof read every word either. I think what they meant with parabolic reflector is the reciever. They mentioned they 3d printed a reciever to achieve recors breaking efficency (short range). It's not so easy to gather and convert the microwaves into electric energy. And it's probably not very easy to create a concentrated beam either. But that was my interpretation. I'm not going to pretend I understand everything about this. I could be wrong. I think the technology to have satellites charge drones in the sky is at least 50 years away.