IIT Mandi develops technology to immune military infrastructures, aircrafts, ships from radar detection

Researchers at IIT Mandi have created an artificial material/structure that can absorb a wide range of radar frequencies and make stealth vehicles and covert establishments less visible to the radar.

According to the institute, Radar Cross Section (RCS) is used in defence and civil sectors for surveillance, and navigation to detect and track; aircraft, ships, ground vehicles and movements within covert establishments.

IIT Madras has claimed that this technology can be very useful as being invisible to radars can be a crucial defence strategy and the ability to evade radar detection can reduce the chances of being targeted by enemy weapons.

The premium institute stated that the radar-absorbing materials play a crucial role in defence applications as they are used to reduce or eliminate the radar signature of military equipment, such as aircraft ships, and vehicles.

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In addition, RCS can also be used to protect critical infrastructure such as communication towers, power plants, and military bases from radar detection. This can prevent non-friendly entities from targeting important facilities during conflict.

“We have developed a technology based on Frequency Selective Surface (FSS) that absorbs a wide range of frequencies used in radar, which makes the surface invisible to radar,” Dr. G Shrikanth Reddy, IIT Mandi said.

The institute has revealed that the proposed design uses an optically transparent ITO-coated PET sheet where the FSS patterns are created on this PET sheet.

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The FSS pattern on the PET sheet was created with the laser engraving technology, and due to the symmetrical and lossy nature of FSS patterns, the proposed absorber is polarization insensitive and absorbs a wide range of EM wave frequencies within C, X and Ku Band.

IIT Mandi informed that the trials showed that this FSS technology can absorb more than 90 per cent of the radar waves in a wide range of frequencies. The team performed experimental studies on their design and the results matched well with the theatrical analysis.

Professor Reddy further revealed that the team has already developed a prototype and the results have been published in IEEE Journal. “This technology has potential applications for RCS reduction and absorption of unwanted radiation leakages,” added Prof Reddy.

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