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KU researchers develop 5G microwave absorber

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The ever-increasing quest for smarter and more advanced electronic devices has placed the world under an inevitable threat of electromagnetic pollution.

In addition to affecting high-end devices, electromagnetic interference (EMI) is known to be harmful to the health of living organisms.

Subodh G., assistant professor in the Department of Physics at the University of Kerala, and researcher Vidhya Lalan have developed fifth generation (5G) microwave absorbers that could serve as an effective shield against such radiation.

The study was recently featured in the peer-reviewed Journal of Material Chemistry C published by the Royal Society of Chemistry.

Immediate attention

“The problems posed by EMI demanded immediate attention in the age of 5G technology and the Internet of Things (IoT) as it has become difficult to undertake routine tasks without the aid of devices. electronics and the Internet that operate around electromagnetic waves. The need for EMI shielding materials, especially those suitable for high frequency applications, has never been more critical than it is today, ”said Dr Subodh.

The new shielding material, a chemically stable “mayenite electride”, showed exceptional microwave absorption capacity in the high frequency region, particularly in the 5G band.

The presence of anionic electrons (chemicals with negatively charged ions) gives the compound high conductivity, which is responsible for its property of high attenuation of electromagnetic waves.

Conductivity

Besides conductivity, the material is also very porous and contains a graphene coating.

Macropores and the graphene interface in the material cause electromagnetic waves to repeatedly undergo reflections and subsequent absorption.

Futuristic devices

The professor points out that the microwave attenuation properties of mayenite electride in the extremely high frequency region describe its potential for futuristic devices designed for 5G applications.

The research was undertaken under the Microwave Materials Laboratory program funded by the University of Kerala.

The whole study was also supported by the Kerala State Council for Science, Technology and the Environment with a research grant through its Research Award for Young State Scientists. of Kerala.