Waveform-selective metasurfaces with normal waves at the same frequency

TL;DR

This paper demonstrates that waveform-selective metasurfaces can control free-space waves at the same frequency based on pulse shape, enabling new applications in antennas and wireless communication systems.

Contribution

It extends waveform-selective metasurface functionality from surface waves to free-space waves, verified through simulation and measurement.

Findings

Selective absorption or transmission for specific pulses

Waveform selectivity applies to free-space waves

Potential for new antenna and communication applications

Abstract

Waveform-selective metasurfaces, reported by Wakatsuchi et al. in 2014, have enabled us to distinguish different surface waves even at the same frequency in accordance with their waveforms or pulse widths. In this study we demonstrate that such new characteristics are applicable to controlling not only surface waves but also free-space waves normal to metasurfaces. Both simulation and measurement results show selective absorption or transmission for specific pulses at the same frequency. Thus the waveform selectivity is expected to create a wider range of new applications, for instance, waveform-selective antennas and wireless communications.