Results 131 to 140 of about 29,904 (298)

Compact 5G Nonuniform Transmission Line Interdigital Bandpass Filter for 5G/UWB Reconfigurable Antenna. [PDF]

Micromachines (Basel), 2022
Saleh S, Jamaluddin MH, Razzaz F, Saeed SM.   +3 more
europepmc   +1 more source

Photonic Time Crystals and Time‐Varying Electromagnetic Metamatter: A New Direction for Ultrafast Tunable Photonic and Microwave Materials and Devices

Advanced Science, EarlyView.
Photonic time crystals (PTCs) are systems in which electromagnetic parameters are modulated periodically in time, producing momentum bandgaps via temporal scattering rather than spatial Bragg processes. This review examines the theoretical frameworks, modeling, and computational tools for time‐varying media, and summarizes experimental demonstrations ...
Ranjan Kumar Patel, Shriram Ramanathan, Ronald P. Jenkins, Michael J. Carter   +3 more
wiley   +1 more source

Machine learning assisted metamaterial-based reconfigurable antenna for low-cost portable electronic devices. [PDF]

Sci Rep, 2022
Patel SK, Surve J, Katkar V, Parmar J.
europepmc   +1 more source

3D Large‐Scale Subwavelength‐Resolution Sound Sheet Tomography Based on an Active and Programmable Circular Meta‐Array

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, Zi‐Bin Lin, Zhuo Chen, Zhao‐Hui Liu, Jin‐Lian He, Jun‐Jie Song, Long‐Sheng Zeng, Liang Zhou, Ming‐Yue Ding, Yu‐Gui Peng, Ming Yuchi, Xue‐Feng Zhu   +11 more
wiley   +1 more source

Frequency-domain reconfigurable antenna for COVID-19 tracking. [PDF]

Sens Int, 2021
Akinola A, Singh G, Ndjiongue A.
europepmc   +1 more source

Random Time‐Space Coding Metasurfaces for Spatial Control of the Temporal Statistics of Electromagnetic Fields

Advanced Science, EarlyView.
A probabilistic framework based on random time‐space coding metasurfaces enables control of the spatial distribution of electromagnetic fields temporal statistics. By tailoring the marginal and joint distributions of random codes, electromagnetic fields with desired mean and variance patterns are realized, enabling simultaneous transmission and jamming.
Jia Cheng Li, Jiang Han Bao, Che Liu, Tie Jun Cui   +3 more
wiley   +1 more source

Reconfigurable Antenna Array Direction Finding System Based on a Fast Search Algorithm. [PDF]

Sensors (Basel), 2021
Liu C, Peng D, Chen Z, Wu Y, Wang B.
europepmc   +1 more source

Study of Free‐Space Optical Quantum Network: Review and Prospectives

Advanced Science, EarlyView.
Free from the constraints of fiber connections, free‐space quantum network enables longer and more flexible quantum network connections. This review summarizes and comparatively analyzes free‐space quantum network experiments based on ground stations, satellites, and mobile platforms.
Hua‐Ying Liu, Zhenda Xie, Shining Zhu
wiley   +1 more source

Optically controlled reconfigurable antenna for 5G future broadband cellular communication networks

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
This paper presents an optically controlled reconfigurable antenna for millimetre-wave frequency range. Silicon switches are used to control the optical reconfiguration, modifying the frequency response and radiation pattern of the antenna design ...
I. F. da Costa, D. H. Spadoti, A. C. Sodré Jr., L. G. da Silva, S. Rodriguez, R. Puerta, J. J. V. Olmos, T. Monroy   +7 more
doaj   +1 more source

Liquid-Based Reconfigurable Antenna Technology: Recent Developments, Challenges and Future. [PDF]

Sensors (Basel), 2021
Abu Bakar H, Abd Rahim R, Soh PJ, Akkaraekthalin P.   +3 more
europepmc   +1 more source