A new stealth coating metamaterial – anapole. What it is and how it works?
ROME, (BM) – Anapol is a non-radiating source or scatterer that is capable of emitting vector potentials in the absence of radiated electromagnetic fields, as well as scattering vector potentials in the absence of fields.
Thanks to this, you can get a unique opportunity to hide various objects, more precisely to shield them from electromagnetic fields and to obtain devices for hidden data transmission.
Moreover, data transmission is possible due to modulation of the vector potential, and the usual propagation of electromagnetic waves (light) in the system will be absent. Moreover, this may mean that we simply do not see many objects and sources in nature, because they do not interact with electromagnetic fields, but interact exclusively with potentials!
Modern methods of stealth masking are aimed at ensuring that the wave reflected from the object is absorbed by the masking coating, minimizing the response to the radar. However, the coating alone is not capable of reducing this response to complete zero due to a combination of factors: surface geometry, high speed of movement, progressive highly sensitive location methods, and the inefficiency of stealth coating absorption.
An international team of scientists from NUST “MISiS” and the Polytechnic University of Turin (Italy), in the framework of cooperation on the ANASTASIA project, have proposed a fundamentally new variant of stealth masking, which will allow the radar signal directed to the object not to be reflected, not absorbed, but simply to pass through, as if no no object.
This method of masking is based not on creating a masking coating, but on changing the configuration of the entire system of the object.
“The stealth disguise used today is far from perfect. Such a coating is expensive, and for more efficient operation it needs the most even surface – as a result, in airplanes, for example, you have to sacrifice the aerodynamic characteristics of the device. In this case, the absorbed signal still creates a “shadow” – a small response that can be detected by more advanced location systems. The task of our team was to “teach” the objects not to reflect the signal, but to let it pass through through the excitation of the special state of electromagnetic fields,” comments Alexei Basharin, project manager from NUST MISiS.
According to the developed theory, the electric moment excited in the system when the radar signal hits it is compensated by the toroidal moment. This effect can be achieved through the use of metamaterial – a material with an artificially created periodic structure. However, there are also other dipole moments that arise both in the object to be hidden and in the coating. And how to hide such systems was not entirely clear.
“The invisibility of the object was predicted by the Devaney-Wolfe theorems. We, in turn, developed this idea for dipole moments, which, like bricks, form the response of a stealth object and developed a generalized invisibility theorem for them and turned it into a mathematical model,” adds Alexei Basharin.
It is noteworthy that the technology can extend to objects of any size: not only for large military equipment, but also for micro and nanoscale electronics. A clear breakthrough will be the use of the described metamaterials as elements of the qubits of quantum computers, the interaction of which is carried out not due to fields, but due to potentials.
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