Results 31 to 40 of about 16,092 (254)
Miniaturization Design for 8 × 8 Butler Matrix Based on Back-to-Back Bilayer Microstrip
International Journal of Antennas and Propagation, 2014 A low-cost, compact 8 × 8 Butler matrix based on a novel bilayer microstrip configuration is presented and implemented for 4.3 GHz telecommunication application.
Yu Zhai +3 more
doaj +1 more source
Switch-Beam Vivaldi Array Antenna Based On 4x4 Butler Matrix for mmWave
MATEC Web of Conferences, 2018 It will be diffcult to use either omnidirectional or fixed beam antenna due to the high propagation losses caused by atmospheric absorption at mmWave for 5G mobile communication.
Safitri Nurlaila +2 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Sulfur‐doped graphitized carbon nanofibers act as adaptive catalyst–support platforms, enabling dynamic sulfur‐mediated reconstruction and strong metal–support interactions. This unique behavior enhances catalyst stability and controls reaction pathways, achieving highly selective urea oxidation (∼92% N2) coupled with efficient hydrogen evolution ...
Melanie Guillén‐Soler +4 more
wiley +1 more source
A smart 5G antenna system with butler matrix and PIN diode control for dynamic beamsteering and beamtracking [PDF]
EPJ Web of ConferencesThe design and implementation of an intelligent antenna system for beam steering and tracking is presented in this paper. The proposed system is a 4×4 Butler matrix using PIN diodes for dynamic beam steering of a four-element microstrip antenna array ...
Elouardi Yasmine +3 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Surface‐initiated photoiniferter‐mediated polymerization (SI‐PIMP) enables the controlled growth of UHMW polymer brushes with multi‐micrometer thicknesses, bridging conventional brushes and bulk‐like coatings. UHMW brushes are synthesized through a controlled/living process; they provide low friction and enhanced wear resistance under aqueous ...
Elena Avanzini +8 more
wiley +1 more source
Advanced Materials Interfaces, EarlyView.Interfacial charge transfer and low‐resistance interphase formation between PEO‐based polymer and Li10GeP2S12 solid electrolytes are investigated using multi‐electrode impedance spectroscopy and advanced analytical techniques such as XPS and ToF‐SIMS.
Ujjawal Sigar +6 more
wiley +1 more source
SIW Butler Matrix with Modified Hybrid Coupler for Slot Antenna Array
IEEE Access, 2016 This paper presents a substrate integrated waveguide Butler matrix with a modified hybrid coupler, operating from 28 to 32 GHz. The modified hybrid coupler is realized by using 90° hybrid coupler followed by a -45° compensating phase ...
Qing-Ling Yang +4 more
doaj +1 more source
Multi beam observations of cosmic radio noise using a VHF radar with beam forming by a Butler matrix [PDF]
Advances in Radio Science, 2011 The Leibniz-Institute of Atmospheric Physics (IAP) in Kühlungsborn started to install a new MST radar on the North-Norwegian island Andøya (69.30° N, 16.04° E) in 2009.
T. Renkwitz +3 more
doaj +1 more source
Advanced Science, EarlyView.This study combines full‐field tomography with diffraction mapping to quantify radial (ε002$\varepsilon _{002}$) and axial (ε100$\varepsilon _{100}$) lattice strain in wrinkled carbon‐fiber specimens for the first time. Radial microstrain gradients (−14.5 µεMPa$\varepsilon \mathrm{MPa}$−1) are found to signal damage‐prone zones ahead of failure, which ...
Hoang Minh Luong +7 more
wiley +1 more source
Advanced Intelligent Discovery, EarlyView.Materials informatics and autonomous experimentation are transforming the discovery of organic molecular crystals. This review presents an integrated molecule–crystal–function–optimization workflow combining machine learning, crystal structure prediction, and Bayesian optimization with robotic platforms.
Takuya Taniguchi +2 more
wiley +1 more source