Results 51 to 60 of about 325,108 (297)

Wideband Circularly Polarized Magneto-Electric Dipole $1\times2$ Antenna Array for Millimeter-Wave Applications

open access: yesIEEE Access, 2020
A novel wideband circularly polarized (CP) magneto-electric (ME) dipole 1 × 2 antenna array for millimeter-wave applications is presented in this paper.
Ying-Fang Wang   +4 more
doaj   +1 more source

Convolution neural network and 77 ​GHz millimeter wave radar based intelligent liquid classification system

open access: yesJournal of Information and Intelligence, 2023
An intelligent liquid classification system based on 77 ​GHz ​millimeter wave radar and convolution neural network are proposed in this paper. The data are collected by the AWR1843 radar platform and processed by the neural network on the host PC in real-
Jiayu Chen   +6 more
doaj   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

open access: yesFEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

User Impact on Phased and Switch Diversity Arrays in 5G Mobile Terminals

open access: yesIEEE Access, 2018
In this paper, a mobile terminal phased array at 28 GHz with different scan angles is compared with a switch diversity antenna array at 28 GHz in the case of antenna beams pointing at the user's body.
Igor Syrytsin   +2 more
doaj   +1 more source

Phased array antenna control [PDF]

open access: yes, 1978
Several new and useful improvements in steering and control of phased array antennas having a small number of elements, typically on the order of 5 to 17 elements are provided.
Doland, G. D.
core   +1 more source

High-rate codes that are linear in space and time [PDF]

open access: yes, 2002
Multiple-antenna systems that operate at high rates require simple yet effective space-time transmission schemes to handle the large traffic volume in real time.
Hassibi, Babak, Hochwald, Bertrand M.
core   +2 more sources

Conserved structural motifs in PAS, LOV, and CRY proteins regulate circadian rhythms and are therapeutic targets

open access: yesFEBS Letters, EarlyView.
Cryptochrome and PAS/LOV proteins play intricate roles in circadian clocks where they act as both sensors and mediators of protein–protein interactions. Their ubiquitous presence in signaling networks has positioned them as targets for small‐molecule therapeutics. This review provides a structural introduction to these protein families.
Eric D. Brinckman   +2 more
wiley   +1 more source

A Compact Dual-Band Circularly Polarized Antenna with Wide HPBWs for CNSS Applications

open access: yesInternational Journal of Antennas and Propagation, 2018
A compact dual-band circularly polarized antenna with wide half-power beamwidths (HPBWs) for compass navigation satellite system applications is proposed in this paper. The CP radiation is realized by arranging four compact dual-band inverted-F monopoles
Chao Li   +3 more
doaj   +1 more source

A telemetry antenna system for unmanned air vehicles [PDF]

open access: yes, 2010
This paper presents a low VSWR high gain telemetry antenna system manufactured for UAVs that provides 360± coverage in the roll plane of the UAV. Proposed telemetry antenna system includes four telemetry antennas, one power divider that has one input and
Dogan, Mustafa   +3 more
core  

Wave-Coupled W-Band LiNbO_3 Mach-Zehnder Modulator [PDF]

open access: yes, 1992
Summary form only given. Mach-Zehnder amplitude modulators have been designed for W-band operation (94 GHz), at a 1.3-μm optical wavelength. These modulators use bow-tie antennas, which are relatively insensitive to DC bias connections made to the ends ...
Bridges, William B.   +2 more
core   +1 more source

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