Nanowerk February 28, 2023
Although various modulation schemes have been proposed to efficiently use the limited frequency resources by exploiting several degrees of freedom, antenna performance is essentially governed by frequency only. An international team of researchers (Japan, Italy, USA – UK) has proposed an antenna design concept based on metasurfaces to manipulate antenna performances in response to the time width of electromagnetic pulses.
They numerically and experimentally showed that by using a proper set of spatially arranged metasurfaces loaded with lumped circuits, ordinary omnidirectional antennas could be reconfigured by the incident pulse width to exhibit directional characteristics varying over hundreds of milliseconds or billions of cycles, far beyond conventional performance. They demonstrated that the proposed concept can be applied for sensing, selective reception under simultaneous incidence and mutual communications as the first step to expand existing frequency resources based on pulse width… read more. Open Access TECHNICAL ARTICLE
Passive variable sensor to detect the location of scattering objects. Credit: Nature Communications volume 14, Article number: 633 (2023)