What materials is fitable for mmwave shell?

[tony_lth]

Hi, Gurus,
I have a radar which is 24GHz. And I want to 3D printer a shell for the 24GHz radar, the vendor provide the following materials for selecting:
ABS-M30, ABS-ESD7, ABS-SL-7820, ASA, Nylon 11, Nylon 12 Carbon-Filled, Nylon 12 Glass-Filled, PC – ABS Polycarbonate, PC-ISO, PC – Like Heat Resist Translucent, Polycarbonate, PLA, PETG, PEEK, ULTEM 1010, ULTEM 9085, Watershed XC 11122, Xtreme Grey Polypropylene, Xtreme White 200, RPU 70, FPU 50, EPX 82, DPR 10, UMA 90, CE 221
Could you comment on which material is fitable for the radar shell?
Best,
Tony Liu

 

[KlausST]

Hi,

what do you consider as "fit" and "non fit" .. and where do you set the limits?

I´m not sure what you expect the material to do or not to do. But I´m sure it also depends on material thickness, material volume, filling density, ....
One also has to consider: mechanical / physical properties, chemical / environmental conditions (like: humidity, water, salt water, temperature, sunlight ...) .. and so on.

Klaus

 

[volker@muehlhaus]

radar shell?

What does "shell" mean here? The material in front of the antenna (i.e. in beam direction) must be well controlled and thin for 24 GHz radar. This is usually co-designed with the antenna.

 

[vfone]

I think you refer to what material to use for making a radome.
Main properties of materials for making radar radomes are: absorption, reflection, wave penetration (signal transparency), protection (snow, rain, wind, UV), durability, etc.

https://www.ti.com/lit/an/swra705/swra705.pdf

https://radar-blog.innosent.de/en/design-of-a-radome/

https://www.generalplastics.com/wp-content/uploads/2016/11/White-Paper-PU-Foam-Dielectric-Materials-for-Use-in-Radomes-and-Other_Applications.pdf