I recently recreated the 3D Printed antenna clam-shell of a Ku-Band Corrugated Horn Antenna where the university researchers investigated the cost benefits trade-offs to machined metal.
The whitepaper is titled "The Prototype of a Wideband Ku-Band Conical Corrugated Horn Antenna with 3-D Printing Technology" by Mustafa Emre Carkaci, Mustafa Secmen within the Department of Electrical and Electronics Engineering at Yasar University, Izmir, Turkey
The whitepaper can be downloaded here :
https://3dprint.com/239566/simulation-and-pla-to-make-lightweight-3d-printed-antenna-prototype/
and here's the link to my model :
If you don't receive the email within an hour (and you've checked your Spam folder), email us as confirmation@grabcad.com