Results 21 to 30 of about 330 (122)
CoRR, 2018 Modern wireless communication is one of the most important information technologies, but its system architecture has been unchanged for many years. Here, we propose a much simpler architecture for wireless communication systems based on metasurface. We firstly propose a time-domain digital coding metasurface to reach a simple but efficient method to ...
Jie Zhao +10 more
openaire +2 more sources
, 2021 Recently, programmable metamaterials or metasurfaces have been developed to dynamically edit electromagnetic waves for realizing different functions in the same platform.
Qian Ma +5 more
core +1 more source
All-Metal Coding Metasurfaces for Broadband Terahertz RCS Reduction and Infrared Invisibility
, 2023 With the rapid advancement of modern technology and radar detection systems, electromagnetic (EM) stealth technology has become increasingly significant, particularly in aircraft stealth and military radar applications.
Najiao Zhang +6 more
core +1 more source
Real-time programmable metasurface for terahertz multifunctional wave front engineering
, 2023 Terahertz (THz) technologies have become a focus of research in recent years due to their prominent role in envisioned future communication and sensing systems.
Hongxin Zeng +9 more
core +1 more source
Microwave Space-Time-Modulated Metasurfaces
, 2022 Over the past decade, static metasurfaces have proved to be low-profile and efficient apparatuses for transformation of electromagnetic waves. However, such metasurfaces are restricted by their reciprocal and time- and frequency-invariant responses.
Taravati, Sajjad +3 more
core +1 more source
, 2023 Recent advancement in digital coding metasurfaces incorporating spatial and temporal modulation has enabled simultaneous control of electromagnetic (EM) waves in both space and frequency domains by manipulating incident EM waves in a transmissive or ...
Vosoughitabar, Shaghayegh +3 more
core +1 more source
Advanced Science, EarlyView.A programmable 2048‐element circular ultrasound array combined with a compact acoustic lens produces a thin “sound sheet” over a large field of view, and records echoes with wide angular diversity across the ring aperture. Coherence‐enhanced beamforming converts full‐matrix data into high‐contrast tomographic slices, delivering near‐diffraction‐limited
Qiu‐De Zhang +11 more
wiley +1 more source
, 2021 Looking back on the development of metamaterials in the past 20 years, metamaterials have gradually developed from three-dimensional complex electromagnetic structures to a two-dimensional metasurface with a low profile, during which a series of ...
Jianjiao Hao +7 more
core +1 more source
Metasurface‐Enabled Active‐Like Passive Radar
Advanced Science, EarlyView.A programmable space‐time‐coding metasurface embeds distinct spatiotemporal tags into ambient wireless signals, allowing passive radar to operate in an active‐like manner. By enabling code‐correlated reconstruction under interference, the approach supports robust real‐time UAV tracking in complex environments and points to intelligent, low‐power ...
Mingyi Li +7 more
wiley +1 more source
Time-varying OAM beams generation by a metasurface
, 2023 We demonstrate the use of a space-time-coding digital metasurface operating in the microwave regime to experimentally generate various modes of time-varying orbital angular momentum (OAM) beams. By developing a time-domain field mapping technique, we are
Zhang, Jingxin +4 more
core