Results 71 to 80 of about 101,767 (351)

Bistable Mechanisms 3D Printing for Mechanically Programmable Vibration Control

Advanced Engineering Materials, EarlyView.
This work introduces a 3D‐printed bistable mechanism integrated into tuned mass dampers (TMDs) for mechanically adaptive passive vibration suppression. Through optimized geometry, the bistable design provides adaptable vibration reduction across a broad range of scenarios, achieving effective vibration mitigation without complex controls or external ...
Ali Zolfagharian, Frédéric Demoly, Mohammad Lakhi, Bernard Rolfe, Mahdi Bodaghi   +4 more
wiley   +1 more source

Joint Mechanical-Electrical Beam Steering for Maritime-LEO Communications: Optimizing Performance Through ESPRIT-Based DOA Estimation

IEEE Open Journal of the Communications Society
Non-terrestrial networks, particularly satellite communications, provide ubiquitous connectivity in next-generation wireless systems. As signals from terrestrial networks cannot reach vessels far from shore, satellite communication is critical in ...
Chun-Tai Liu, Jen-Yi Pan
doaj   +1 more source

Enhancing Corrosion Resistance and Mechanical Strength of 3D‐Printed Iron Polylactic Acid for Marine Applications via Laser Surface Texturing

Advanced Engineering Materials, EarlyView.
Laser surface texturing significantly improves the corrosion resistance and mechanical strength of 3D‐printed iron polylactic acid (Ir‐PLA) for marine applications. Optimal laser parameters reduce corrosion by 80% and enhance tensile strength by 25% and ductility by 15%.
Mohammad Rezayat, Mojtaba Karamimoghadam, Mohammadreza Lalegani Dezaki, Ali Zolfagharian, Giuseppe Casalino, Antonio Mateo, Mahdi Bodaghi   +6 more
wiley   +1 more source

Beam steerable MIMO antenna based on conformal passive reflective metasurface for 5G millimeter wave applications

Scientific Reports
A conformal reflective metasurface fed by a dual-band multiple-input multiple-output (MIMO) antenna is proposed for low-cost beam steering applications in 5G Millimeter-wave frequency bands.
Bilal Tariq Malik, Shahid Khan, Slawomir Koziel   +2 more
doaj   +1 more source

Grid-Oscillator Beam-Steering Array [PDF]

, 1994
Recently Liao and York (see IEEE Trans. Microwave Theory Tech., vol.41, no.10, p.1810, 1993) showed that beam-steering can be achieved by detuning the end elements of a coupled-oscillator array.
Li, Shijie, Rutledge, David B.
core  

Millimeter-wave diode-grid phase shifters [PDF]

, 1988
Monolithic diode grids have been fabricated on 2-cm square gallium-arsenide wafers with 1600 Schottky-barrier varactor diodes. Shorted diodes are detected with a liquid-crystal technique, and the bad diodes are removed with an ultrasonic probe.
Chen, Howard Z., Jou, Christina F., Lam, Wayne W., Luhmann, Neville C., Jr., Rutledge, David B., Stoltz, Kjell S.   +5 more
core   +1 more source

Dynamic Precipitation during High‐Pressure Torsion of a Magnesium–Manganese Alloy

Advanced Engineering Materials, EarlyView.
An ultrafine‐grained alloy is produced by high‐pressure torsion of solutionized Mg–1.35 wt% Mn. Precipitation of nanometer‐scale Mn particles during deformation provides pinning sites. This prevents the formation of a bimodal grain structure and results in a finer grain size than for pure Mg.
Julian M. Rosalie, Anton Hohenwarter
wiley   +1 more source

Experimental demonstration of dual-polarization multiplexed optical phased array empowered by inverse design

Nanophotonics
This paper presents a dual-polarization multiplexed optical phased array (OPA) implemented on a 220 nm silicon-on-insulator (SOI) platform, enabling continuous beam steering across TE and TM modes.
Kim Jae-Yong, Lee Seungsoo, Hong Seokjin, Neseli Berkay, Choi Seungyoon, Park Hyo-Hoon, Kurt Hamza   +6 more
doaj   +1 more source

Design of a beam-steering test bench based on OpenVPX architecture

The Journal of Engineering, 2019
Due to a large number of beam-steering units and complex interfaces of a spaceborne phased-array radar, the fault location in joint tests is difficult, the troubleshooting efficiency is low, and the progress of the project is difficult to guarantee.
Yanhua Li, Wenguang Xiao
doaj   +1 more source

Fabrication‐Directed Entanglement for Designing Chiral and Anisotropic Metamaterial Foams

Advanced Engineering Materials, EarlyView.
This work introduces fabrication‐directed entanglement (FDE), combining viscous thread printing and topology optimization to program entangled foams with spatially patterned stiffness. By tuning coil density, FDE enables anisotropy, programmable Poisson's ratio, and chirality in foams.
Daniel Revier, Brett Emery, Jacob Miske, Jeffrey Lipton   +3 more
wiley   +1 more source