Results 71 to 80 of about 250,786 (296)

Antenna arrays focused by broadband signals

Физика волновых процессов и радиотехнические системы, 2015
Broadband and ultra-wideband signals are increasingly used in modern antenna technology, and various radio systems. Traditional performance evaluation antennas operating with narrow band signals are not always adequately reflect the characteristics of ...
Yu.E. Sedelnikov, D.A. Vedenkin
doaj  

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

Azimuth Null-Reduced Radiation Pattern, Ultralow Profile, Dual-Wideband and Low Passive Intermodulation Ceiling Mount Antenna for Long Term Evolution Application

IEEE Access, 2019
An ultralow profile, dual-wideband and low passive intermodulation (PIM) in-building ceilingmount antenna for long term evolution (LTE) distributed antenna system (DAS) application is presented.
Kok Jiunn Ng, Mohammad Tariqul Islam, Adam Alevy, Mohd. Fais Mansor, Choon Chung Su   +4 more
doaj   +1 more source

High‐gain omnidirectional patch antenna for conformal application based on near‐zero‐index metamaterials

IET Microwaves, Antennas & Propagation, 2021
Achieving a high‐gain omnidirectional patch antenna with low profile is a challenging task. On the basis of improving antennas by metamaterials, a broadband near‐zero‐index metamaterial (NZIM) is designed to enhance the horizontal gain of the ...
Tianqiang Zhang, Jing Zhao, Yao Guo, Xiaopeng Zhao   +3 more
doaj   +1 more source

Azaporphyrinoid‐Based Photo‐ and Electroactive Architectures for Advanced Functional Materials

Advanced Materials, EarlyView.
A long‐standing collaboration between the Torres and Guldi groups has yielded diverse azaporphyrinoid‐based donor‐acceptor nanohybrids with promising applications in solar energy conversion. This conspectus highlights key molecular platforms and structure‐function relationships that govern light and charge management, supporting the rational design of ...
Jorge Labella, Kobra Azizi, Dirk M. Guldi, Tomás Torres   +3 more
wiley   +1 more source

Study of radio resource sharing for future mobile WiMAX applications with relays [PDF]

, 2007
WiMAX (802.16e) is technically capable of offering city-wide broadband connections to a high number of mobile terminals. The technology has strong industrial support, however a number of challenges remain to be resolved.
Nix, AR, Y. Bian, Bian, YQ, Y. Sun, P. Strauch, A. Nix, Sun, Y, Strauch, P   +7 more
core   +1 more source

3D Anodic Alumina Nanoarchitectures: A Decade of Progress from Foundational Science to Functional Metamaterials

Advanced Materials, EarlyView.
Ordered three‐dimensional anodic aluminum oxide (3D‐AAO) nanoarchitectures with longitudinal and transverse pores enable architecture‐driven metamaterials. The review maps fabrication advances, including hybrid pulse anodization, and shows how 3D‐AAO templates tailor properties across magnetism, energy, catalysis, and sensing.
Marisol Martín‐González
wiley   +1 more source

Experimental verification of broadband antennas loaded with metamaterials

, 2015
The intrinsic frequency dispersion has been usually considered as a relevant drawback of metamaterials, limiting their application to narrowband microwave components.
BILOTTI, FILIBERTO, A Toscano, VERRENGIA, ANDREA, MONTI, ALESSIO, Muha, D., TROTTA, FABRIZIO, F. Trotta, TOSCANO, ALESSANDRO, A. Verrengia, D. Ramaccia, F. Bilotti, RAMACCIA, DAVIDE, BARBUTO, MIRKO, A. Monti, D. Muha, M. Barbuto, Hrabar, S., S. Hrabar   +17 more
core   +1 more source

CP metasurfaced antennas excited by LP sources [PDF]

, 2012
A metasurface which is considered as a polarizer for microwave antennas is proposed in this paper. Preliminary results have shown that circularly polarized (CP) radiation can be obtained from linearly polarized (LP) source antennas with the use of ...
T. I. Yuk, Zhu, Hailiang, S. W. Cheung, Cheung, SW, Cheung, S. W., Zhu, H, Chung, Kwok L. (R17316), Chung, KL, Hailiang Zhu, Yuk, TI, X. L. Sun, Kwok L. Chung, Yuk, Tong I., Sun, X, Sun, X. L.   +14 more
core   +1 more source

Transparent Perovskite Light‐Emitting Diodes with Conductive Oxide Top Electrodes

Advanced Materials, EarlyView.
Transparent perovskite light‐emitting diodes (TrPeLEDs) enable simultaneous display and transparency, expanding application possibilities. Using a metal oxide buffer layer and pulsed laser deposition, TrPeLEDs with diverse compositions and architectures are demonstrated.
Michele Forzatti, Sergio Martínez‐Saiz, Morena Cervino, Edoardo Stanzani, Sandra Jenatsch, Qingsen Zeng, Joo Sung Kim, Dong‐Hyeok Kim, Eojin Yoon, Tae‐Woo Lee, Daniel Tordera, Henk J. Bolink   +11 more
wiley   +1 more source