Results 71 to 80 of about 28,237 (308)

Low‐Profile, High‐Gain GRIN RF Lenses via Multi‐Material Vat Photopolymerization

Advanced Functional Materials, EarlyView.
We investigate the opportunity of leveraging multi‐material vat photopolymerization printing to manufacture intricate lenses exhibiting permittivity gradients that can increase signal gain in transmitted radiofrequency signals in the X‐ and Ku‐bands. Lenses produced with more distinct low‐loss materials (up to 5) can deliver an 18 dB signal gain with a
Lawrence Romangsuriat, Alexander Peraire‐Bueno, A. John Hart, Randall M. Erb   +3 more
wiley   +1 more source

2D simulation of the electromagnetic wave across the non-uniform reentry plasma sheath with COMSOL

AIP Advances, 2019
The simulation of the electromagnetic wave propagation plays an important role in solving the communication blackout issue. Finite element analysis software package COMSOL is employed by us to model the electromagnetic wave propagation in the presence of
Jiahui Zhang, Yanming Liu, Xiaoping Li, Lei Shi, Min Yang, Bowen Bai   +5 more
doaj   +1 more source

Electromagnetic wave propagation in a superconducting parallel-plate waveguide filled with an indefinite medium

Results in Physics, 2019
The electromagnetic wave propagation is analysed in a superconducting parallel-plate waveguide filled with an indefinite medium. The dispersion relations of transverse electric and transverse magnetic wave modes are derived by using the Meissner boundary
Burhan Zamir, Rashid Ali, Muzaffar Bashir   +2 more
doaj   +1 more source

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

Energetic electron precipitation during substorm injection events: High-latitude fluxes and an unexpected midlatitude signature [PDF]

, 2008
Geosynchronous Los Alamos National Laboratory (LANL-97A) satellite particle data, riometer data, and radio wave data recorded at high geomagnetic latitudes in the region south of Australia and New Zealand are used to perform the first complete modeling ...
Menk, F. W., Menk, F.W., Neil. R. Thomson, Brundell, J.B., Annika Seppälä, John Bähr, Reiner H. W. Friedel, Neil Cobbett, Tracy Moffat‐Griffin, Andrew J. Kavanagh, Craig J. Rodger, Brundell, J., Kavanagh, Andrew J., Rodger, C. J., James Brundell, Seppälä, A., Kavanagh, A.J., Friedel, R.H.W., Thomson, N. R., Bähr, J., Clilverd, M. A., Rodger, C.J., Friedel, R. W. H., Moffat-Griffin, T., Thomson, N.R., Frederick W. Menk, Cobbett, N., Clilverd, M.A., Mark A. Clilverd   +28 more
core   +1 more source

Offshore Electromagnetic Spectrum Distribution Prediction Model Based on Ray Tracing Method and PM Wave Spectrum

IEEE Access, 2019
Electromagnetic spectrum distribution prediction is the basis for the development of wireless communication technology. Due to the high randomness of the rough sea surface, it is difficult to accurately predict the offshore electromagnetic spectrum ...
Zhenjia Chen, Yonghui Zhang
doaj   +1 more source

Laws of reflection and refraction of TE and TM polarization waves on the border of rhombic crystals

Қарағанды университетінің хабаршысы. Физика сериясы, 2020
The article analytically solves the problem of reflection and refraction of electromagnetic plane waves of different polarization at the boundary of anisotropic half-spaces of rhombic symmetry.
С.К. Тлеукенов, К.Н. Балабеков, З.К. Жалгасбекова   +2 more
doaj   +1 more source

Directional Flow of Confined Polaritons in CrSBr

Advanced Materials, EarlyView.
CrSBr, a layered magnetic semiconductor, naturally channels self‐hybridized excitonpolaritons into highly directional flow. Its intrinsic optical anisotropy, high refractive index, and strong lightmatter coupling enable long‐range guided modes along the a‐axis, with propagation lengths set by their excitonphoton admixture.
Pratap Chandra Adak, Sichao Yu, Jaime Abad‐Arredondo, Biswajit Datta, Andy Cruz, Sorah Fischer, Kseniia Mosina, Zdeněk Sofer, Antonio I. Fernández‐Domínguez, Francisco J. Garcia‐Vidal, Vinod M. Menon   +10 more
wiley   +1 more source

Self‐Assembled Inorganic Nanomembrane Tubes: Rolled‐Up Piezoelectrics for Microacoustic Wave‐Based Actuators and Sensors

Advanced Materials, EarlyView.
This study demonstrates a self‐assembly process to generate free‐standing piezoelectric nanomembranes, forming ultracompact microtubular acoustic wave sensors and actuators. The miniaturized 3D piezoelectric platform reported in this work can be applied in telecommunication, energy harvesting, and acoustofluidics. Moreover, the 3D self‐assembly can add
Raphaël C. L‐M. Doineau, Christian N. Saggau, Stefan Baunack, Thomas Gemming, Yara Abdelaal, Robert Weser, Oliver G. Schmidt, Hagen Schmidt, Andreas Winkler, Mariana Medina‐Sánchez   +9 more
wiley   +1 more source

Wave propagation in electromagnetic media

, 1990
This is the second work of a set of two volumes on the phenomena of wave propagation in nonreacting and reacting media. The first, entitled Wave Propagation in Solids and Fluids (published by Springer-Verlag in 1988), deals with wave phenomena in ...
Julian L. Davis, Davis, Julian L
core   +1 more source