Just to add, he writes up on his stuff too:

He made an SBand antenna out of a Beachball: https://dalybulge.blogspot.com/2023/09/diy-gatr-ball-antenna...

Before that a Fabric Parabolic Antenna: https://dalybulge.blogspot.com/2022/11/updates-on-portable-p...

Explaining how he did the design: https://dalybulge.blogspot.com/2022/10/parabola-design.html