Results 191 to 200 of about 59,676 (299)

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

A Solar Cell Compatible Super-Wideband Flexible Transparent Antenna with Enhanced Axial Ratio. [PDF]

Micromachines (Basel)
Rasool N, Yang S, Chen C, Tang Z, Huang K, Gao J.   +5 more
europepmc   +1 more source

Selective Lithium Recovery via Photothermal Evaporation and Hydration‐Controlled Adsorption

Advanced Science, EarlyView.
A bilayer Mo‐LDH@Sponge composite is developed to couple interfacial photothermal evaporation with hydration‐controlled lithium adsorption. Solar‐induced heating dynamically regulates Li+ hydration and transport, enabling selective lithium capture from saline water. This work provides mechanistic insight into photothermal–adsorption coupling for energy‐
Yanan Pan, Yue Zhang, Guoliang Liu, Weiquan Zhan, Wencai Zhang   +4 more
wiley   +1 more source

A scalable UWB-to-reconfigurable MIMO filtenna with single-varactor tuning and enhanced isolation for adaptive 5G and cognitive radio systems. [PDF]

Sci Rep
Fouda HS, Hamoud AS, Attia MA.
europepmc   +1 more source

3D‐Printed Architected Anisotropic Channels for Ultrafast Solar‐Driven Interfacial Evaporation via Localized Thermal Management and Water Layer Structuring

Advanced Science, EarlyView.
A 3D‐printed anisotropic channel evaporator integrates directional geometry with aligned titanium oxide, boron nitride, and chitosan networks to coordinate photon absorption, heat localization, and water transport. Phonon‐guided thermal pathways and interfacial water structuring enable ultrahigh evaporation rates and long‐term salt‐resistant solar ...
Sijia Sun, Dong Jiang, Hengsong Zheng, Shuai Zhang, Ziyuan Cheng, Changtong Mei, Dan Tian, Shilong Yang, Yusuke Yamauchi, Mingzhu Pan   +9 more
wiley   +1 more source

A novel approach to design compact, wideband, and high-gain circularly polarized MIMO antenna using dual-polarized elements and hybrid couplers. [PDF]

Sci Rep
Tran H, Kim-Thi P, Tran N, Hoang-Thi-Phuong T, Vu-Van Y.   +4 more
europepmc   +1 more source

Engineered Interpenetrating MXene Networks in Aramid Layered Films for Antioxidant and Broadband Electromagnetic Interference Shielding

Advanced Science, EarlyView.
This study introduces an innovative interpenetrating layered structure, comprising alternating aramid nanofiber (ANF) layers and MXene layers, fabricated through a directional freeze–thaw intercalation–gel‐film formation strategy. Unlike traditional homogeneous layered films, this unique layered structure features mutually embedded conductive and ...
Hongli Cheng, Gaojie Han, Congqi Liu, Yang Zhou, Yiming Wang, Bing Zhou, Yuezhan Feng, Chuntai Liu, Hao‐Bin Zhang, Changyu Shen   +9 more
wiley   +1 more source

Wideband tilted beam end-fire antenna using double semi-circular rings. [PDF]

Sci Rep
Patel A, Panagamuwa C, Whittow W.
europepmc   +1 more source

An Improved Modified Universal Ultra-Wideband Antenna Designed for Step Frequency Continuous Wave Ground Penetrating Radar System. [PDF]

Sensors (Basel), 2019
Wu Y, Shen F, Yuan Y, Xu D.
europepmc   +1 more source

Interfacial Synergy in a Band‐Aligned Low‐Dimensional Heterojunction Toward Broadband Photodetection

Advanced Science, EarlyView.
Monolithically integrating sensing and communication, a Ta2NiSe5/Sb2Te3 heterojunction achieves visible‐to‐near‐infrared photovoltaics with high‐speed terahertz photo‐thermoelectric detection at room temperature. By engineering a Type‐II van der Waals heterojunction, we overcome the intrinsic spectral limitations and disparate physical requirements of ...
Yuanfeng Wen, Kening Xiao, Yao Yang, Mengjie Jiang, Libo Zhang, Shicong Hou, Hang Ma, Yunduo Zhang, Wenqi Mo, Yiran Tan, Bolang Peng, Jinqiu Huang, Xueyuan Wei, Chunming Liu, Bangjian Zhao, Jiale He, Qing Li, Songyuan Ding, Yi Zhou, Guanhai Li, Xiaoshuang Chen   +20 more
wiley   +1 more source