joe smith | Introduction to Waveguides using the LiteVNA, Part3, 3D Printed Horns @joesmith-je3tq | Uploaded February 2023 | Updated October 2024, 4 days ago.
This video compares various 3D printed plastic horns by looking at their radiation patterns and VSWR. Also shown is a simple experiment where we attempt to compare a few different solid materials placed inside of a waveguide.

EEVBLOG thread, Experimenting with waveguides using the LiteVNA
eevblog.com/forum/rf-microwave/experimenting-with-waveguides-using-the-litevna

It was mentioned that The Signal Path channel made a video on 3D printed waveguides. The attached link takes you to what I believe they were referring to. He made a few horns and a filter. He's experimenting at much higher frequencies than I am and surface finish.

youtu.be/bo8pQmKgwgw?t=1966

During this video, I show a couple of printed horns from the following link. Maybe we can test them out in the future.

antennatestlab.com/3dprinting

Introduction to Waveguides using the LiteVNA, Part1
youtube.com/watch?v=h-bxyxLQtIk

Introduction to Waveguides using the LiteVNA, Part2
youtube.com/watch?v=qxH-a0cCY3U