2008 - German invents radar camouflaging paint.

a reply to: Astr0

Maybe the information is still out there...but camoflaged?

That would be an interesting piece of software maybe, one that hides all instances of a class of information but allows access to, say, a code holder.

Just a thought. Cool thread btw.

a reply to: Doxanoxa

hey. unfortunately astr0 does not post on ats any more.

Researchers Demonstrate Wideband Metamaterial Absorber Made of 3D Printed Conductive Plastic:

There’s been a lot of research into 3D printing metamaterials over the years – due to their unique properties, they’ve been used to make everything from headphones and heart valve models to door locks and acoustic holograms, and maybe someday even our very own invisibility cloaks. But ten years ago, the metamaterial absorber (MA), a type of metamaterial with compact size and thin configuration meant to efficiently absorb electromagnetic radiation, was presented for the first time. Since that time, there have been numerous other MAs, including dual-, triple-, and multiband varieties and the wideband MA.

Because of its high absorption, wideband MAs are highly sought after for applications in sensing, nondestructive detection, and imaging. There are a few ways to increase the absorption bandwidth for wideband MAs, but it’s still tough to manufacture them.

3dprint.com...

Wideband Metamaterial Absorbers Based on Conductive Plastic with Additive Manufacturing Technology

Authors:

Lu et al

Abstract:

This paper proposes a wideband and polarization-insensitive metamaterial absorber (MA) based on tractable conductive plastic, which is compatible with an additive manufacturing technology. We provide the design, fabrication, and measurement result of the proposed absorber and investigate its absorption principle. The performance characteristics of the structure are demonstrated numerically and experimentally. The simulation results indicate that the absorption of this absorber is greater than 90% in the frequency range of 16.3−54.3 GHz, corresponding to the relative absorption bandwidth of 108%, where a high absorption rate is achieved. Most importantly, this additive manufactured structure provides a new way for the design and fabrication of wideband MAs.

Paper link:

pubs.acs.org...

3D printing is growing especially in its materials.

a reply to: anzha

Search, tracking, and targeting/guidance all take place below 16.3GHz.

But that's interesting.