Telemeter Launches Radar-Absorbing Filament: Print Your Own EMI Shields for Automotive Sensors

The Problem: Radar Sensors Need Custom Absorbers

As vehicles pack more radar sensors — adaptive cruise control, blind-spot detection, emergency braking, parking assist — engineers keep running into the same problem: off-the-shelf absorber parts never quite fit the geometry they need.

Traditional radar absorber foam and machined fixtures work, but they're bulky, slow to iterate, and awkward around complex housings. When you're testing a new sensor placement or designing a custom enclosure, waiting weeks for machined absorber parts kills development velocity.

The Solution: Printable Radar Absorber

German company Telemeter Electronic has launched what they're calling the first 3D-printable electromagnetic absorber filament for FFF printers. Tuned specifically for 76–81 GHz automotive radar frequencies (and effective up to 100 GHz), the PLA-based material lets engineers print custom absorber parts on demand.

No more waiting for machined parts. No more compromising on geometry. Design the absorber you need, print it overnight, test it the next morning.

How It Works

The filament incorporates electromagnetic-absorbing compounds into a PLA matrix. When printed, the resulting parts absorb radar-frequency electromagnetic waves rather than reflecting them — critical for:

• Automotive sensor testing — Eliminate false reflections that corrupt measurements
• Radar cross-section design — Shape how vehicles appear to radar systems
• EMI shielding — Protect sensitive electronics from interference
• Antenna isolation — Prevent coupling between adjacent sensors

The material works with standard FFF printers, though Telemeter recommends hardened nozzles due to the filler content.

Why This Matters

Automotive radar is exploding. Modern vehicles can have 10+ radar sensors around the car, each operating in a crowded frequency band. Getting these sensors to work together — without interfering with each other or picking up spurious reflections — requires careful absorber placement.

Until now, absorber design was a specialist discipline. You bought foam sheets or machined parts from a handful of suppliers. Rapid iteration wasn't really possible.

With printable absorber filament, any automotive engineering team with a decent FFF printer can design, test, and iterate absorber geometry in-house. That's a significant reduction in development friction.

Applications Beyond Automotive

While Telemeter is positioning this for automotive radar, the applications go further:

• 5G/6G testing — Millimeter-wave frequencies need similar absorber treatment
• Aerospace — Radar cross-section testing for drones and aircraft
• Electronics labs — Custom EMI shields for sensitive measurement setups
• Defence — Rapid prototyping of radar-absorbing structures

Availability

Telemeter Electronic is selling the filament directly through their distribution network. Pricing hasn't been publicly disclosed yet, but given the specialised nature of the material, expect it to command a premium over standard PLA.

For automotive teams already invested in 3D printing for prototyping, this could be a natural extension of existing workflows — and a way to bring absorber design in-house.

The Bottom Line

Printable radar absorber filament represents a quiet but meaningful shift: electromagnetic materials are becoming accessible to anyone with a 3D printer. As vehicles get smarter and sensor-packed, tools like this will become standard issue in automotive engineering labs.

If you're working with automotive radar or millimeter-wave systems, this is worth a closer look.