Results 101 to 110 of about 522,444 (298)
Research on Large Scale Antenna Arrays for 5G Mobile Communication Technology
Dianxin kexue, 2015 The basic conception，background and development of the fifth-generation（5G）mobile communication technology were described. As the key technology of 5G，the research of large scale antenna arrays attracts more and more attention.
Feng Gao +5 more
doaj +2 more sources
Mineral Deposition From Liquid Precursors Triggered by Complementary Polyelectrolytes
Advanced Functional Materials, EarlyView.Polyelectrolyte additives can delay or prevent crystal nucleation in supersaturated solutions of insoluble mineral salts such as calcium carbonate. This work reports that adding a second, oppositely‐charged polyelectrolyte leads to immediate mineral crystallization from such metastable solutions.
Mohammed Kayes Patoary +6 more
wiley +1 more source
On the design of clustered planar phased arrays for wireless power transmission [PDF]
, 2015 In the framework of wireless power transmission applications, the design of planar phased arrays providing maximum beam collection efficiency (i.e., maximizing the ratio between the power radiated over a target area and the total power transmitted by the
Poli, Lorenzo +2 more
core +1 more source
SensorsA novel design strategy for improving the radiative performance of simultaneous multibeam (SMB) phased arrays is addressed. The proposed scheme relies on the adoption of mixed and multiple antenna element factors with a dynamic selection of their ...
Francesco Alessio Dicandia +1 more
doaj +1 more source
Advanced Functional Materials, EarlyView.A tubular electrowetting pump moves alternating droplets through a millimeter‐wide channel in discrete, reversible steps, functioning as a fluidic stepper motor. With no moving parts and electrodes insulated from the liquid, it delivers silent, accurate flow. Flexibility allows the pump to be woven directly into textiles for wearable, medical, and soft‐
Robert Hennig, Herbert Shea
wiley +1 more source
Satellite phased arrays for direct-to-handset satellite: key technologies and future vision
Dianxin kexueTo address the long distance and significant loss in satellite-to-ground wireless link, new demands are imposed on satellite phased arrays by direct-to-handset satellite.
JIAO Lingxiao +3 more
doaj +2 more sources
Synthesis of Phased Cylindrical Arc Antenna Arrays
International Journal of Antennas and Propagation, 2009 This paper describes a new approach to synthesize cylindrical antenna arrays controlled by the phase excitation, to synthesize directive lobe and multilobe patterns with steered zero.
Hussein Rammal +4 more
doaj +1 more source
3D Hydrodynamic Flow Lithography
Advanced Functional Materials, EarlyView.ABSTRACT Continuous‐ and stop‐flow lithography are widely used to fabricate multi‐dimensional microstructures whose cross‐sectional morphology is dictated by the flow profile of multiple co‐flowing streams. Here, we introduce three‐dimensional hydrodynamic flow lithography (3D HFL), a platform for programmable generation of multi‐layered flow profiles ...
Yiying Zou +5 more
wiley +1 more source
DESIGN AND IMPLEMENTATION OF A PHASED ARRAY ANTENNA FOR MULTI-MISSION APPLICATIONS [PDF]
, 2018 Multifunction Phased Array Radar (MPAR) was defined to investigate the feasibility of integrating weather observation and air surveillance radars into a single network.
Mirmozafari, Mirhamed
core
Compact planar L-band antenna arrays with optimal diversity performance [PDF]
, 2011 At L-band (1-2GHz) due to significantly large freespace wavelengths, compact antenna arrays with small interelement separation i.e., d < λ/2, are a suitable choice for overall size reduction.
Caizzone, Stefano +9 more
core +1 more source