Smart Radio Environments

Gradoni, Gabriele; Renzo, Marco Di; Díaz-Rubio, Ana; Tretyakov, Sergei; Caloz, Christophe; Peng, Zhen; Alù, Andrea; Lerosey, Geoffroy; Fink, Mathias; Galdi, Vincenzo; Cui, Tie Jun; Frazier, Benjamin W.; Anlage, Steven M.; Salucci, Marco; Massa, Andrea; Cheng, Qiang; Wang, Jinghe; Jin, Shi; Dardari, Davide; Decarli, Nicolò; Yurduseven, Okan; Matthaiou, Michail; Kenney, Mitchell; Gordon, George; Georgiou, Orestis; Nguyen, Cam Ly; Martini, Enrica; Maci, S.; Wakatsuchi, Hiroki; Phang, Sendy

doi:10.48550/arxiv.2111.08676

Cited by 6 publications

(8 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared to conventional materials that respond to an incident wave in accordance with the reaction of composite molecules, the response of metasurfaces is characterized by composite unit cells that are much larger than molecules but still at the subwavelength scale and can thus be arbitrarily customized to achieve a range of electromagnetic properties including negative refraction 6 and a large impedance surface 3 . In addition, these metasurfaces with exotic properties can be exploited to develop applied devices or systems such as invisibility cloaks 7,8 , diffraction-limit-breaking lenses 9,10 , perfect absorbers [11][12][13][14] , antennas 15,16 , analogue computation systems [17][18][19] and beamforming systems 4,5,[20][21][22] as intelligent reflecting surfaces (IRSs) [23][24][25] .…”

Section: Introductionmentioning

confidence: 99%

Design guidelines for the SPICE parameters of waveform-selective metasurfaces varying with the incident pulse width at a constant oscillation frequency

Imai

Homma

Takimoto

et al. 2023

Preprint

View full text Add to dashboard Cite

In this study, we numerically demonstrate how the response of recently reported circuit-based metasurfaces is characterized by their circuit parameters. These metasurfaces, which include a set of four diodes as a full wave rectifier, are capable of sensing different waves even at the same frequency in response to the incident waveform, or more specifically the pulse width. This study reveals the relationship between the electromagnetic response of such waveform-selective metasurfaces and the SPICE parameters of the diodes used. First, we show that reducing a parasitic capacitive component of the diodes is important for realization of waveform-selective metasurfaces in a higher frequency regime. Second, we report that the operating power level is closely related to the saturation current and the breakdown voltage of the diodes. Moreover, the operating power range is found to be broadened by introducing an additional resistor into the inside of the diode bridge. Our study is expected to provide design guidelines for circuit-based waveform-selective metasurfaces to select/fabricate optimal diodes and enhance the waveform-selective performance at the target frequency and power level.

show abstract

Section: Introductionmentioning

confidence: 99%

Design guidelines for the SPICE parameters of waveform-selective metasurfaces varying with the incident pulse width at a constant oscillation frequency

Imai

Homma

Takimoto

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…6G is expected to fulfill the requirements of a fully connected world and provide ubiquitous wireless connectivity for all [3], adopting transformative solutions, e.g. intelligent surfaces and programmable wireless environments [4], [5], [6], [7]. Furthermore, it is to be noted that among these interconnected devices, millions of vehicles fitted with onboard communication systems and a range of autonomous capabilities are being increasingly phased in as part of this network of connected devices [8].…”

Section: Introductionmentioning

confidence: 99%

Intelligent Beam Steering for Wireless Communication Using Programmable Metasurfaces

Ashraf

Saeed

Taghvaee

et al. 2023

IEEE Trans. Intell. Transport. Syst.

View full text Add to dashboard Cite

Reconfigurable Intelligent Surfaces (RIS) are well established as a promising solution to the blockage problem in millimeter-wave (mm-wave) and terahertz (THz) communications, envisioned to serve demanding networking applications, such as 6G and vehicular. HyperSurfaces (HSF) is a revolutionary enabling technology for RIS, complementing Software Defined Metasurfaces (SDM) with an embedded network of controllers to enhance intelligence and autonomous operation in wireless networks. In this work, we consider feedback-based autonomous reconfiguration of the HSF controller states to establish a reliable communication channel between a transmitter and a receiver via programmable reflection on the HSF when Line-of-sight (LoS) between them is absent. The problem is to regulate the angle of reflection on the metasurface such that the power at the receiver is maximized. Extremum Seeking Control (ESC) is employed with the control signals generated mapped into appropriate metasurface coding signals which are communicated to the controllers via the embedded controller network (CN). This information dissemination process incurs delays which can compromise the stability of the feedback system and are

show abstract

“…With the advent of metamaterials and metasurfaces, more advanced reflective surfaces capable of exotic and complicated beamforming have been reported [5]- [8]. More recently, the proposal for smart radio environment [9] has exponentially increased the interest in reconfigurable reflective surfaces which are usually referred to as reconfigurable intelligent surfaces (RISs) in the context of smart radio environment. In this emerging concept, the reconfigurable reflective surfaces or RISs are envisioned to allow controllable propagation of information-bearing signals based on the status of the channel [10].…”

Section: Introductionmentioning

confidence: 99%

Sensing and Reconfigurable Reflection of Electromagnetic Waves From a Metasurface With Sparse Sensing Elements

Alamzadeh

Imani

2022

IEEE Access

View full text Add to dashboard Cite

Smart Radio Environments

Cited by 6 publications

References 2 publications

Design guidelines for the SPICE parameters of waveform-selective metasurfaces varying with the incident pulse width at a constant oscillation frequency

Design guidelines for the SPICE parameters of waveform-selective metasurfaces varying with the incident pulse width at a constant oscillation frequency

Intelligent Beam Steering for Wireless Communication Using Programmable Metasurfaces

Sensing and Reconfigurable Reflection of Electromagnetic Waves From a Metasurface With Sparse Sensing Elements

Contact Info

Product

Resources

About