Results 111 to 120 of about 36,933 (358)
Multiple-access phased array antenna simulator for a digital beam forming system investigation [PDF]
Future versions of data relay satellite systems are currently being planned by NASA. Being given consideration for implementation are on-board digital beamforming techniques which will allow multiple users to simultaneously access a single S-band phased ...
Alexovich, Robert E. +5 more
core +1 more source
Computer Vision Control for Phased Array Beam Steering [PDF]
, 2018 This work proves a concept for a wireless access point that uses image identification and tracking algorithms to automate the electronic control of a phased antenna array.
Freking, Jacob A
core +1 more source
, 2018 We demonstrate advanced transversal radio frequency (RF) and microwave functions based on a Kerr optical comb source generated by an integrated micro-ring resonator.
Chu, Sai T. +8 more
core +1 more source
Photonic Engineering Enables All‐Passive Upconversion Imaging with Low‐Intensity Near‐Infrared Light
Advanced Functional Materials, EarlyView.A passive upconversion imaging system enables the observation of scenes illuminated by low‐intensity incoherent near‐infrared light from 750 to 930 nm, by converting it into the visible without the use of external power. The upconverter is enabled by triplet–triplet annihilation in a bulk heterojunction, with absorption enhanced by plasmonic resonators
Rabeeya Hamid +13 more
wiley +1 more source
Metamaterial-Based Wide-Angle Scanning Circularly Polarized Phased Array With Stable Gain
IEEE Open Journal of Antennas and PropagationIn this paper, a wide-angle scanning circularly polarized phased array with stable gain is proposed. The proposed antenna array is composed of truncated microstrip antennas, four rows of mushroom metamaterials, and two tensor holographic metasurfaces ...
Xiangyu Yin +3 more
doaj +1 more source
Wireless Power Transfer to a Microaerial Vehicle with a Microwave Active Phased Array
International Journal of Antennas and Propagation, 2014 A wireless power transfer system using a microwave active phased array was developed. In the system, power is transferred to a circling microaerial vehicle (MAV) by a microwave beam of 5.8 GHz, which is formed and directed to the MAV using an active ...
Shotaro Nako +4 more
doaj +1 more source
Tailoring the Properties of Functional Materials With N‐Oxides
Advanced Functional Materials, EarlyView.The properties of materials bearing N‐oxide groups are often dominated by the polar N+─O− bond. It provides hydrophilicity, selective ion‐binding, electric conductivity, or antifouling properties. Many of the underlying mechanisms have only recently been discovered, and the interest in N‐oxide materials is rapidly growing.
Timo Friedrich +5 more
wiley +1 more source
Optical true time-delays for phased-array antennas using 2×2 MEMS switches and fiber delay lin [PDF]
, 2002 Gab‐Yong Lee
openalex +1 more source
Configurable phased antenna array
, 2019 The present subject matter relates to devices, systems, and methods for beam steering in which a configurable antenna assembly includes a first antenna element configured to radiate in a first broadside direction and a second antenna element configured to radiate in an endfire direction.
Zhang, Jin +2 more
openaire +2 more sources
Multifunctional Microstructured Surfaces by Microcontact Printing of Reactive Microgels
Advanced Functional Materials, EarlyView.Reactive poly(N‐vinylcaprolactam‐co‐glycidyl methacrylate) microgels are used as functional inks to create surface‐grafted arrays on glass via microcontact printing. The patterns (10–50 µm widths and spacings) enable stable binding and post‐functionalization with dyes and peptides.
Inga Litzen +4 more
wiley +1 more source