Radar Absorbent Materials and Stealth Technology

Radar Absorbent Materials and Stealth Technology

Low Radar Observability Capabilities of military platforms translates into having a Low Radar Cross Section (RCS), and traditionally it has been solved using a double folded approach involving the use of Radar Absorbing Materials and Special Geometry of Shapes.

However, the use of both tools imposes some restrictions. On one hand, the traditional Radar Absorbing Material add-on weight is rather large (which limits the areas where they can be applied) and the materials degrade easily on Marine environmental conditions. On the other hand, the use of special Geometry of Shapes can be defeated with bi-static and multi-static radars, and although it has a relatively good performance, there are still certain areas on the vessel that cannot be addressed with such technique.

In this scenario, Micromag, has come with a complete new approach to the problem. Micromag has developed Radar Absorbing Materials that while reducing the Radar Cross Section, do not increase the weight, has a long lifespan and is applicable to all the areas. The technology is based on the use of proprietary made metallic micro fibres with an outer glass coating. Those fibres are mixed with different substrates resulting in a Radar Absorbing Composite material that integrates Micromag technology and absorbs Radar Radiation on tuneable frequency bands. Moreover by absorbing the electromagnetic waves Radar Absorbing Materials also minimize electromagnetic interference.

The substrates used to produce Micromag Radar Absorbing Materials are chosen to maximize their applicability in the different platforms of interest. For example, for large platforms, such as Navy Vessels, Micromag has developed Radar Absorbing Coatings that can endure the same extreme weather conditions as the substrate where its fibres are embedded into, since the coatings used are Navy approved commercial coatings. Thus, Micromag Radar Absorbing Coatings can be applied onto the whole ship providing it with Stealth Technology, whether as an aid to existing Geometry of Shapes or to existing vessels without such technology.

Needless to say, these Radar Absorbing Coatings can be applied onto any surface that needs to be painted and requires a low radar observability and/or minimization of interferences. Micromag can produce these Radar Absorbing Coatings with any paint specified by the customer. Moreover, Micromag ensures that the top coat will be the same as the one used by the customer, and thus, other functionalities (IR, aesthetical finishing, such as, camouflage) are also provided. So, for example, armoured fighting vehicles can be treated with this Stealth Technology, and airport/airfield hangars can be painted with Radar Absorbing Coatings in order to reduce interferences.

Furthermore, Micromag Radar Absorbing Materials portfolio includes Glass Reinforced Epoxies and Polyestirenes (GRE/GRP) Absorbing Materials. These materials can be custom made to customer specifications and any GRE/GRP structure can be constructed with the added functionality of stealthiness. Two examples of these structures are GRE boats, that require RCS reduction, such as, unmanned patrol boats, and wind mills that require interference reduction.

The versatility of Micromag fibres has allowed to manufacture many other Radar Absorbing Materials, such as, foams for very low add-on weight restrictions (i.e. UAV), flexible rubber or silicone materials that can be used for Electromagnetic Interference Control, and flexible canvases, for structures that cannot be treated with Radar Absorbing Coatings or other Radar Absorbing Materials or need to be covered and uncovered frequently.

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