Results 1 to 10 of about 1,302,382 (255)

High precision epidermal radio frequency antenna via nanofiber network for wireless stretchable multifunction electronics

open access: yesNature Communications, 2020
Designing efficient radio frequency antenna for wireless stretchable multifunction electronics remains a challenge. Here, the authors present epidermal radio frequency antenna based on silver nanofibers network for wireless power transfer and information
Yufei Zhang   +10 more
doaj   +2 more sources

A Bose horn antenna radio telescope (BHARAT) design for 21 cm hydrogen line experiments for radio astronomy teaching [PDF]

open access: yesAmerican Journal of Physics, 2022
We have designed a low-cost radio telescope system named the Bose Horn Antenna Radio Telescope (BHARAT) to detect the 21 cm hydrogen line emission from our Galaxy.
A. A. Mhaske   +4 more
semanticscholar   +1 more source

Radio-transparent dipole antenna based on a metasurface cloak [PDF]

open access: yesNature Communications, 2021
Antenna technology is at the basis of ubiquitous wireless communication systems and sensors. Radiation is typically sustained by conduction currents flowing around resonant metallic objects that are optimized to enhance efficiency and bandwidth. However,
J. Soric   +3 more
semanticscholar   +1 more source

Study on deployment mechanism of the satellite umbrella antenna

open access: yesHangkong gongcheng jinzhan, 2023
The relaxation and jumping from slot of the power rope of the antenna deployment mechanism are likely to occur in the process of antenna deployment and folding.
LIU Tingting   +3 more
doaj   +1 more source

Limiting Accuracy of Height Measurement for a Precision Radar Altimeter in a Low Altitude Flying Vehicle above the Sea Surface

open access: yesRemote Sensing, 2021
This study presents mathematical analysis and numerical modeling for the estimation of measurement errors of height estimation over the sea surface for a precision radar altimeter installed in a low altitude flying vehicle.
Aleksandr I. Baskakov   +3 more
doaj   +1 more source

Sub-terahertz silicon-based on-chip absorption spectroscopy using thin-film model for biological applications

open access: yesScientific Reports, 2022
Spectroscopy in the sub-terahertz (sub-THz) range of frequencies has been utilized to study the picosecond dynamics and interaction of biomolecules. However, widely used free-space THz spectrometers are typically limited in their functionality due to low
Seyed Ali Hosseini Farahabadi   +5 more
doaj   +1 more source

WGM-Based Sensing of Characterized Glucose- Aqueous Solutions at mm-Waves

open access: yesIEEE Access, 2020
A newly-developed commercial coaxial probe kit (DAK-TL) is used to characterize the electromagnetic properties of glucose-loaded samples prepared at a range of concentrations 0.7-1.2 mg/ml similar to Type-2 normal diabetics in a broad range of ...
Ala Eldin Omer   +3 more
doaj   +1 more source

Simulation of Small Radio Telescope Antenna Parameters at Frequency of 1.42 GHz

open access: yesIraqi Journal of Physics, 2022
The paper presents an overview of theoretical aspects of small radio telescope antenna parameters. The basic parameters include antenna beamwidth, antenna gain, aperture efficiency, and antenna temperature.
Uday E Jallod   +2 more
doaj   +1 more source

Sionna RT: Differentiable Ray Tracing for Radio Propagation Modeling [PDF]

open access: yes2023 IEEE Globecom Workshops (GC Wkshps), 2023
Sionna™ is a GPU-accelerated open-source library for link-level simulations based on TensorFlow. Since release v0.14 it integrates a differentiable ray tracer (RT) for the simulation of radio wave propagation.
J. Hoydis   +6 more
semanticscholar   +1 more source

Effect of Beam Angle of the Transmitting Antenna on Radio Wave Coverage in the Region Containing Tunnel Entrance

open access: yesIEEE Access, 2022
Radio wave coverage in open-confined mixed space along the railway is studied in this paper. The space along the railway can be classified into three kinds of spaces, that are, open space, confined space and the open-confined mixed space.
Zhenyu Zhao, Junhong Wang, Weibin Hou
doaj   +1 more source

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