Results 51 to 60 of about 1,607 (205)

Measurements of Antenna Parameters in GTEM Cell

open access: yesJournal of Communications Software and Systems, 2010
The paper presents the method for measuring parameters (gain, antenna factor, impedance and radiation pattern) of small antennas in GTEM cell, which is a novel method and environment for antenna measurements.
Zlatko Živković, Antonio Šarolić
doaj  

Conformal and Flexible Antennas in Ultra-High Frequencies: Prospects and Challenges for Partial Discharge Diagnostics

open access: yesIEEE Access
With the exponential increase in smart device usage across various domains, flexible and conformal antenna technologies have emerged as transformative solutions, enabling wireless systems in numerous smart applications.
M. A. Taher   +8 more
doaj   +1 more source

Considerations for the Design of UWB Antennas for Mobile and Consumer Equipment

open access: yes, 2005
This paper presents some considerations on the design, characterization and optimization of UWB (Ultra WideBand) antennas for consumer communication equipment.
Manteuffel, Dirk
core   +1 more source

The Errors Caused by Test Site Configuration at the Radiated Emission Measurement

open access: yesAdvances in Electrical and Electronic Engineering, 2004
Nowadays, it is very important to know and to keep uncertainty of EMC measurements at low value to ensure the comparability of measurement results from different laboratories.
Miki Bittera   +3 more
doaj  

Advances in Novel Structures and Materials for Shaped Charge Liners

open access: yesShock and Vibration, Volume 2025, Issue 1, 2025.
As a core component of shaped charges, the liner’s structural and material properties are crucial for overcoming traditional technological limitations and enhancing the cumulative effect in applications involving civil explosives and resource extraction. This field presents broad application prospects.
Yihao Shen   +7 more
wiley   +1 more source

A pore network modeling approach to bridge void ratio‐dependent soil water retention and unsaturated hydraulic conductivity curves

open access: yesEngineering Reports, Volume 6, Issue 12, December 2024.
The comparison between the evolution of wetting flow path and local saturation in PNM at different stress levels and suctions under (A) 0.09 kPa, (B) 2.58 kPa, (C) 13.83 kPa, (D) 42.34 kPa, (E) 226.8 kPa, and (F) 11,358 kPa. Abstract In geotechnical engineering, understanding the relationship between soil permeability and deformation is essential ...
Rasoul Mirghafari   +4 more
wiley   +1 more source

Multiband Asymmetric Biconical Dipole Antenna with Distributed Surface Impedance and Arbitrary Excitation

open access: yesEast European Journal of Physics
A numerical-analytical solution of a problem concerning the current distribution and input characteristics of asymmetric biconical dipole with distributed surface impedance and arbitrary excitation and derived in the thin-wire approximation.
Mikhail V. Nesterenko   +2 more
doaj   +1 more source

Phase transition in Eu2Zr2–xO7–2x (x = 0–1) solid solutions: A combined structural and spectroscopic study

open access: yesJournal of the American Ceramic Society, Volume 107, Issue 11, Page 7604-7618, November 2024.
We report the fabrication of a series of solid solutions, Eu2Zr2–xO7–2x (x = 0–1, step = 0.125), using a co‐precipitation route. Subsequently, the phase transitions from ordered pyrochlore Eu2Zr2O7 to disordered pyrochlore Eu2Zr1.5O6, then to defect fluorite Eu2ZrO5 have been studied using both structural and spectroscopic techniques.
Linggen Kong   +3 more
wiley   +1 more source

Calibration of the Logarithmic-Periodic Dipole Antenna (LPDA) Radio Stations at the Pierre Auger Observatory using an Octocopter [PDF]

open access: yes, 2017
An in-situ calibration of a logarithmic periodic dipole antenna with a frequency coverage of 30 MHz to 80 MHz is performed. Such antennas are part of a radio station system used for detection of cosmic ray induced air showers at the Engineering Radio ...
Aab, A.   +404 more
core   +3 more sources

The ceramic vessels of the late antique and early medieval domus in the religious complex of San Pietro (Canusium, Italy): Clayey geosources, local production and imports in northern Apulia

open access: yesGeoarchaeology, Volume 39, Issue 5, Page 508-529, September/October 2024.
Abstract This study broadens our knowledge of the relationship between the clayey georesources available in northern Apulia and the artisanal production of ceramics. The focus is placed on a collection of 6th and 7th century A.D. pottery found in the domus excavated within the archaeological complex of Canosa San Pietro (ancient Canusium) in Italy. The
Elisabetta Gliozzo   +3 more
wiley   +1 more source

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