Results 241 to 250 of about 879,091 (323)

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

open access: yesAdvanced 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   +3 more
wiley   +1 more source

Ad hoc bandwidth requests and power conservation in 5G wireless networks with tiny cells. [PDF]

open access: yesSci Rep
Rajesh A   +6 more
europepmc   +1 more source

Stable Wireless Power Transmission for a Capsule Robot With Randomly Changing Attitude

IEEE transactions on power electronics, 2023
Wireless power transmission (WPT) for a capsule robot (CR) has always been a challenging issue because the unpredictable CR attitude can destabilize the induced power of the receiving coil onboard the CR. This article proposes a new WPT system for stably
Jinyang Gao   +7 more
semanticscholar   +1 more source

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