A research team at Syracuse University has introduced a new concept for designing ultra-thin absorbers with a record-high bandwidth-to-thickness ratio, potentially several times greater than that of conventional absorbers.
A research team at Syracuse University has made a groundbreaking discovery in the field of electromagnetic absorption, introducing a novel concept for designing ultra-thin absorbers. These absorbers have the potential to achieve a record-high bandwidth-to-thickness ratio, exceeding the capabilities of conventional approaches by several times.
The advancement in absorber design holds immense promise for various industries, including defense, energy harvesting, and advanced communication systems.Absorbers play a crucial role in numerous technologies, from energy harvesting and stealth systems to communication networks. They efficiently capture electromagnetic waves across broad frequency ranges, enabling the development of sustainable, self-powered devices like remote sensors and the Internet of Things (IoT) systems. In addition, they are vital for stealth technology, minimizing radar visibility and enhancing the performance of aircraft and naval systems. They also contribute to improving communication networks by reducing stray signals and mitigating electromagnetic interference, making them essential in our increasingly interconnected world.Traditionally, the bandwidth-to-thickness ratio of metal-backed, passive, linear, and time-invariant absorbing layers has been limited by a theoretical upper bound. Prior absorbers, regardless of their operational frequency range or material thickness, have fallen short of this theoretical limit, unable to fully exploit the potential of passive, linear, and time-invariant systems. However, Professor Younes Ra'di and his research team have overcome this limitation with their innovative approach, published in Nature Communications. By utilizing this concept, they designed and experimentally verified an absorber that achieves an exceptionally high bandwidth-to-thickness ratio, bringing us closer to the ultimate theoretical bound
ULTRA-THIN ABSORBERS ELECTROMAGNETIC ABSORPTION BANDWIDTH-TO-THICKNESS RATIO ENERGY HARVESTING STEALTH TECHNOLOGY COMMUNICATION NETWORKS
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