Multibeam and Beam Scanning With Modulated Metasurfaces

Bodehou, Modeste; Martini, Enrica; Maci, S.; Huynen, Isabelle; Craeye, Christophe

doi:10.1109/tap.2019.2944554

Cited by 53 publications

(31 citation statements)

References 34 publications

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“…Challenge There are several different antenna technologies and terminologies for RISs, including reflectarrays [8]; transmit arrays [9]; smart, programmable, and software-defined metasurfaces [10]; large intelligent surfaces; and so on.…”

Section: Ris Modeling and Channel Modelingmentioning

confidence: 99%

Radio Localization and Mapping With Reconfigurable Intelligent Surfaces: Challenges, Opportunities, and Research Directions

Wymeersch

Denis

et al. 2020

IEEE Veh. Technol. Mag.

248

181

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G radio for millimeter-wave (mm-wave) and beyond-5G concepts at 0.1-1 THz can exploit angle and delay measurements for localization through an increased bandwidth and large antenna arrays, but they are limited in terms of blockage caused by obstacles. Reconfigurable intelligent surfaces (RISs) are seen as a transformative technology that can control the physical propagation environment in which they are embedded by passively reflecting radio waves in preferred directions and actively sensing this environment in receive and transmit modes. While such RISs have mainly been intended for communication purposes, they can provide great benefits in terms of performance, energy consumption, and cost for localization and mapping. These benefits as well as associated challenges are the main topics of this article. ApplicationsThe interaction between the digital and physical worlds relies on high-definition situational awareness, i.e., the ability of a device to determine its own location as well as that of objects and other devices in the operating environment. Applications include automated vehicles and robots, in general, as well as health care, highly immersive virtual and augmented reality, and new human-to-machine interfaces. Situational awareness can be achieved with a variety of technologies, depending on the application and requirements, including lidar, inertial measurement units, and cameras. Additional technologies include radio-based ones such as satellite positioning, radar, ultrawideband, cellular, and Wi-Fi. Such technologies are attractive because they can have dual communication and sensing functionalities and are often less susceptible to environmental factors, such as poor lighting.Since 4G, dedicated localization reference signals have been considered part of communications system design and standardization. These can enable location accuracy levels on the order of 10 m. With 5G, the use of larger bandwidths and higher carrier frequencies, in combination with antenna arrays in user equipment (UE) and base stations (BSs), is expected to further improve location accuracy to roughly 1 m. Within beyond-5G systems, the trend is to operate at much higher frequencies

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Section: Ris Modeling and Channel Modelingmentioning

confidence: 99%

Radio Localization and Mapping With Reconfigurable Intelligent Surfaces: Challenges, Opportunities, and Research Directions

Wymeersch

Denis

et al. 2020

IEEE Veh. Technol. Mag.

248

181

View full text Add to dashboard Cite

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“…A frequencyscanned monopulse radar using an array of two LWAs has been proposed in [18]. Metasurface antennas excited by multiple feeds to achieve multibeam and beam-scanning capabilities have been proposed in [19], [20]. Finally, some of the present authors proposed in [21] a 2-D LWA fed by four surfacewave launchers placed in the antenna center to provide full polarization reconfigurability.…”

Section: Introductionmentioning

confidence: 99%

Directive 2-D Beam Steering by Means of a Multiport Radially Periodic Leaky-Wave Antenna

Comite

Kuznetcov

Buendía

et al. 2021

IEEE Trans. Antennas Propagat.

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A multi-fed radially periodic two-dimensional leakywave antenna is proposed for the generation of a directional beam continuously scanning in elevation by changing the frequency, and over a discrete number of directions in azimuth when activating different elements of the feeding system. The structure is planar and constituted by a circular grounded dielectric slab loaded with microstrip rings, properly positioned around the sources to support the propagation of an angularly directional surface wave over a sector determined by the corresponding activated feeder. This produces a perturbation of the surface wave, resulting in the generation of a directional leaky wave over the aperture, whose complex propagation constant is described by a single fast backward spatial harmonic. The antenna radiation features are numerically investigated in conjunction with the dispersion analysis of the structure, validated through a conventional generalizedpencil-of-function approach. Full-wave simulations have been developed to design a practical feeder, which is constituted by a circular arrangement of commercial coaxial connectors. The proposed multi-port antenna is validated by means of measurements performed on a microwave manufactured prototype. The design represents an attractive simple and cost-effective solution to achieve a high-gain beam scanning over the threedimensional space, alternative to more conventional phased-array design based on cumbersome and lossy feeding networks.

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“…This interest is due to the multiple advantages offered by this type of antennas (low profile, low cost, limited power losses, etc). A lot of progress has been made in the synthesis of modulated MTS antennas, which include the generation of high-gain polarized beams [4], shaped beam synthesis [5]- [8], multibeam with multiple feeds [9], [10] etc.…”

Section: Introductionmentioning

confidence: 99%