54 citations · 81 across the 11 of their papers we have counts for
11 papers
An Experimental Validation of Reconfigurable Intelligent Surfaces Achieving Pulse Width-Modulated Singular Reflection Angles Without External Power Sources
Eisuke Omori, Kairi Takimoto, Atsuko Nagata +3
In this study, we introduce a design concept that leverages pulse width variation to enable a reconfigurable intelligent surface (RIS) and to autonomously switch reflection propert…
Experimental and Numerical Validation of Tape-Based Metasurfaces in Guiding High-Frequency Surface Waves for Efficient Power Transfer
K. Suzuki, P. T. Dang, H. Homma +5
We present an effective method for transmitting electromagnetic waves as surface waves with a tape-based metasurface design. This design incorporates silver square patches periodic…
Metasurface-Enabled Multifunctional Single-Frequency Sensors without External Power
Masaya Tashiro, Kosuke Ide, Kosei Asano +5
IoT sensors are crucial for visualizing multidimensional and multimodal information and enabling future IT applications/services such as cyber-physical space, digital twins, autono…
Inkjet printed intelligent reflecting surface (IRS) for indoor applications
Kairi Takimoto, Kazutomo Nakamura, Peter Njogu +7
A passive, low-cost, paper-based intelligent reflecting surface (IRS) is designed to reflect a signal in a desired direction to overcome non-line-of-sight scenarios in indoor envir…
Frequency-Hopping Wave Engineering with Metasurfaces
Hiroki Takeshita, Ashif Aminulloh Fathnan, Daisuke Nita +2
Wave phenomena can be artificially engineered by scattering from metasurfaces, which aids in the design of radio-frequency and optical devices for wireless communication, sensing,…
Design guidelines for the SPICE parameters of waveform-selective metasurfaces varying with the incident pulse width at a constant oscillation frequency
Shiori Imai, Haruki Homma, Kairi Takimoto +8
In this study, we numerically demonstrate how the response of recently reported circuit-based metasurfaces is characterized by their circuit parameters. These metasurfaces, which i…
Unsynchronized Reconfigurable Intelligent Surfaces with Pulse-Width-Based Design
Ashif Aminulloh Fathnan, Kairi Takimoto, Mizuki Tanikawa +3
In this correspondence, we present a reconfigurable intelligent surface (RIS) that reflects an incident signal to the desired direction, depending on the pulse width. This unique r…
Metasurface-Inspired Maintenance-Free IoT Tags Characterised in Both Frequency and Time Domains
Masaya Tashiro, Ashif Aminulloh Fathnan, Yuta Sugiura +2
We present metasurface-inspired maintenance-free IoT tags that can be characterised not only by frequency-domain profiles but also by time-domain profiles. In particular, time-doma…
Pulse-Driven Self-Reconfigurable Meta-Antennas
Daiju Ushikoshi, Riku Higashiura, Kaito Tachi +11
Wireless communications and sensing have notably advanced thanks to the recent developments in both software and hardware. Although various modulation schemes have been proposed to…
Characterization of Broadband Focusing Microwave Metasurfaces at Oblique Incidence
Ashif A. Fathnan, Toufiq M. Hossain, Dadin Mahmudin +2
We report the characterization of an achromatic focusing metasurface at oblique incident angles. We show that in addition to the inherent off-axis aberrations that occurs due to th…
Bandwidth Limit and Synthesis Approach for Single Resonance Ultrathin Metasurfaces
Ashif A. Fathnan, Andreas E. Olk, David A. Powell
Metasurfaces have emerged as a promising technology for the manipulation of electromagnetic waves within a thin layer. In planar ultrathin metasurfaces, there exist rigorous narrow…