Results 51 to 60 of about 180,101 (277)

Microwave Imaging under Oblique Illumination [PDF]

Sensors, 2016
Microwave imaging based on inverse scattering problem has been attracting many interests in the microwave society. Among some major technical challenges, the ill-posed, multi-dimensional inversion algorithm and the complicated measurement setup are critical ones that prevent it from practical applications.
Qingyang Meng, Kuiwen Xu, Fazhong Shen, Bin Zhang, Dexin Ye, Jiangtao Huangfu, Changzhi Li, Lixin Ran   +7 more
openaire   +4 more sources

Rapid Diagnostics of Reconfigurable Intelligent Surfaces Using Space‐Time‐Coding Modulation

Advanced Functional Materials, EarlyView.
A fast reconfigurable‐intelligent‐surface (RIS) diagnostics method is proposed based on spatio‐temporal modulation with orthogonal codes. Theoretical analysis demonstrates a clear distinction in code channel power between normal and faulty elements. Simulations validate its feasibility under high fault ratios and varying receiving angles.
Yi Ning Zheng, Lei Zhang, Xiao Qing Chen, Marco Rossi, Giuseppe Castaldi, Shuo Liu, Tie Jun Cui, Vincenzo Galdi   +7 more
wiley   +1 more source

A theoretical study of microwave beam absorption by a rectenna [PDF]

, 1980
The rectenna's microwave power beam absorption limit was theoretically confirmed by two mathematical models descriptive of the microwave absorption process; first one model was based on the current sheet equivalency of a large planar array above a ...
Ott, J. H., Rice, J. S., Thorn, D. C.
core   +2 more sources

Sensitivity Study of the Microwave Spiralimetric Imaging [PDF]

2005 18th International Conference on Applied Electromagnetics and Communications, 2005
The use of the spiral modes-electromagnetically related to the orbital momentum of the photons- at microwave frequencies for imaging purposes is studied and some preliminary numerical and experimental results for basic canonical geometries are presented and ...
Jofre Roca, Lluís, Blanch Boris, Sebastián, Cardama Aznar, Ángel, Rius Casals, Juan Manuel, Torner Sabata, Lluís   +4 more
openaire   +2 more sources

Solvent‐Induced Octahedral Self‐Assembly of Prussian Blue and Its Applications in Sodium‐Ion Capacitors

Advanced Functional Materials, EarlyView.
This study investigates the stepwise assembly process of octahedral Prussian Blue (PB) particles in glycerol. Initially, smaller cubic PB nanoparticles form and interact in the solvent. Over time, these particles undergo dissolution and reassembly, leading to the formation of well‐defined octahedral structures with minimized surface energy.
Seunghye Jang, Carsten Korte, Sangmin Lee, Changshin Jo   +3 more
wiley   +1 more source

Electrochemically Driven Tandem In‐Plane Reduction and FeCl3‐ Intercalation of Highly Crystalline Graphene Oxide Thin Films

Advanced Functional Materials, EarlyView.
This study presents a green processing route for high‐performance reduced graphene oxide (rGO) transparent conductive films (TCFs) using highly crystalline Brodie's GO. In‐plane electrochemical reduction forms rGO on insulating substrates without toxic reductants or heat. Subsequent FeCl₃ intercalation enhances conductivity, overcoming the transparency–
Tatsuki Tsugawa, Kazuto Hatakeyama, Junya Kawasaki, Agamoni Pathak, Kazuhito Tsukagoshi, Shintaro Ida, Takaaki Taniguchi   +6 more
wiley   +1 more source

Additive‐Driven Phase Control for Stable and Efficient CsPbI₃ Solar Cells Via Ambient Low‐Temperature Processing

Advanced Functional Materials, EarlyView.
CsPbI₃ perovskite solar cells face stability issues due to high annealing temperatures and moisture. Butylammonium acetate (BAAc) enables stable phase formation at 160°C in ambient laboratory conditions, enhancing efficiency and stability, achieving 18.6% PCE, and maintaining over 81% efficiency after 1,000 hours of maximum power point tracking under 1
Narendra Pai, Aaron Seeber, Wen Liang Tan, Luke J. Sutherland, Chris Easton, Wenqi Yan, Yogesh Gulia, Yesim Gozukara, Jueng‐Eun Kim, Mei Gao, Dechan Angmo   +10 more
wiley   +1 more source

Superconducting Material Diagnostics using a Scanning Near-Field Microwave Microscope

, 1998
We have developed scanning near-field microwave microscopes which can image electrodynamic properties of superconducting materials on length scales down to about 2 $\mu$m.
Anlage, Steven M., Dutta, Sudeep K., Feenstra, B. J., Hu, Wensheng, Steinhauer, D. E., Thanawalla, A. S., Vlahacos, C. P., Wellstood, F. C.   +7 more
core   +2 more sources

Magnetic‐Field Dependent VB− Spin Decoherence in Hexagonal Boron Nitrides: A First‐Principles Study

Advanced Functional Materials, EarlyView.
This study investigates the decoherence of the VB− defect in h‐BN under external magnetic fields using first‐principles quantum many‐body simulations. A transition boundary distinguishing distinct decoherence regimes is identified, with its dependence on isotopic composition.
Jaewook Lee, Hyeonsu Kim, Huijin Park, Hosung Seo   +3 more
wiley   +1 more source

All‐Optical Electric Field Sensing with Nanodiamond‐Doped Polymer Thin Films

Advanced Functional Materials, EarlyView.
The photoluminescence (PL) of fluorescent nanodiamonds (FNDs) in a polymer‐based capacitor device is sensitive to electric fields. When an external electric field is applied, the PL intensity of the negatively charged nitrogen‐vacancy center (NV‐) increases, while that of the neutrally charged NV center (NV0) decreases.
Roy Styles, Mengke Han, Toon Goris, Jim G. Partridge, Brett C. Johnson, Blanca del Rosal, Amanda N. Abraham, Heike Ebendorff‐Heidepriem, Brant C. Gibson, Nikolai Dontschuk, Jean‐Philippe Tetienne, Philipp Reineck   +11 more
wiley   +1 more source