Micromag’s 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 (RAM) also minimize electromagnetic interference.
The physical characteristics of the micro fibres (size, shape, low mass and glass coating) allow them to be integrated into many different substrates easily and efficiently. So far, Micromag has successfully produced coatings, glass reinforced materials (epoxies and polyesters), silicones, foams, plastics… Micromag will provide you with a Radar Absorbing Material in the substrate of your choosing.
Micromag added weight of microfibers is in the order of tens of grams. The total weight of the RAM will be determined by the base material and the chosen frequency of maximum attenuation. When the structure provides the sufficient thickness, as glass reinforced products, the added weight is negligible.
Adding Micromag fibers to a base material only changes its electromagnetic properties and the resulting composite will degrade because of the base material but not because of Micromag fibers. Micromag provides a working guarantee of 5 or more years.
The substrates used to produce Micromag Radar Absorbing Materials are chosen to maximize their applicability in the different platforms of interest, and they include:
Radar Absorbing Coatings
Aimed for large platforms, such as Navy Vessels, and can endure extreme weather conditions. The coatings used are Navy approved commercial coatings. Micromag Radar Absorbing Coatings can be applied onto the whole ship providing it with Stealth Technology, whether as an aid to existing shaping geometry 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.
Micromag has made an effort to make its Radar Absorbing Coatings easily applicable with existing painting techniques (airless, HVLP or even roller), and Micromag fibers can be mixed with commercially available coatings. Moreover, Micromag provides single or non-harmonic double frequency band absorbing coatings, such that wideband absorption is also achievable.
Micromag Radar Absorbing Coatings have been tested, validated and endorsed by the Spanish Navy, certified by the US and France and commercially deployed in Asia and the Middle East.
Micromag counts with its own spraybooth and different application equipment (rollers, HVLP and airless) where it develops and tests the developed Radar Absorbing Coatings and their application parameters (pressures, nozzle sizes, etc), so that, application at the customer’s facilities (i.e. shipyard) runs smoothly.
Radar Absorbing Glass Reinforced Epoxies and Polyestirenes (GRE/GRP)
Micromag Radar Absorbing Materials portfolio also 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.
Micromag fibres are integrated in a layer of MAT and delivered to your local facilities for integration into the construction of your structure. It can be treated as any other layer of your construction process, laid on your structure, where necessary, and impregnated with the usual epoxy. If needed Micromag will also provide a back plane in the same manner. Depending on the desired frequency(ies) of maximum attenuation.
MAT with integrated Micromag fibres
Radar Absorbing MAT and back plane as supplied
GRE plate with stealth capabilities
GRE plate, as in boat structure, with stealth capabilities
Flexible Radar Absorbing Materials
Micromag can also provide Flexible Radar Absorbing Materials to cover those areas that cannot be painted, such as several structures on board of vessels, or those used in terrestrial vehicles and hangars. They are made to fit the structure, protected with high grade canvas, and tuned to the customer’s frequency requirements.
Flexible Radar Absorbing Materials covering on board structures
Radar Absorbing Silicones and Flexible Rubber
Radar Absorbing flexible rubber or silicone materials can be used for Electromagnetic Interference Control, where coating is not possible and flexibility is important to cover curved surfaces. Micromag has partnered with several manufacturers that integrate its fibers into these materials producing radar absorbing silicones and rubbers.
Radar Absorbing Foams
Radar Absorbing Foams are the solution for very low add-on weight restrictions, due to their intrinsic low density, such as UAVs. Micromag is currently developing Radar Absorbing Foams with a broadband absorption.