3D Print UV resin dielectrics are changing the way experimenters like me design and build microwave and mmWave antennas and components in our home labs and workshops.

Rogers corp recently announced Radix (TM) a new 3D printing UV resin for SLA/DLP printers which has a hugely improved performance as a dielectric for creating lenses and beam-forming elements for microwave and mmwave antenna systems. The feature sizes that are possible means we'll be able to create 3D printed graded-index or GRIN lenses for focussing and refracting microwave and mmWave signals in the range from a few GHz up to at least 47 GHz.

The material has a dissipation factor/loss tangent of around 0.004, which is an order of magnitude better than most UV resins. It beats the ABS filament from Preperm on water absorption and looks like it is going to make possible things we haven't even thought of yet.

https://www.anycubic.com/collections/...
https://www.elegoo.com/collections/3d...

   • Development of a 3D Printable Photopo...   Fortify

Garcia and Chisum, https://arxiv.org/pdf/2003.09004.pdf

Images from Rogers Corp https://rogerscorp.com/advanced-elect...
and Coonrod's Corner    • Coonrod's Corner 2021  - Overview of ...  
More detail about the Luneberg lenses at 3D Fortify's site https://3dfortify.com/3d-printed-rf-d...
and on their Youtube seminar    • Development of a 3D Printable Photopo...  

Other images and scribble are my own. You can tell, they're a bit rubbish.

Chapters:
00:00 WAIT! WHAT?
00:39 Graded Index 3D Metamaterials
02:01 Rogers Radix(TM) UV 3D Resin