Results 61 to 70 of about 750,689 (337)
, 2023 The semestral thesis considers a Archimedean spiral slotted leaky-wave antenna as having a beneficial antenna parameters [7], thus aiming at reproducing the results so as to either validate or disprove them. The antenna is fabricated in a way of commonly
Blažek, Jiří
core
Advanced Engineering Materials, EarlyView.Aluminum and nitride coatings are used in industry because they are hard, resist wear, and protect against oxidation. Adding boron can improve friction behavior and other properties. This study tests coatings on surfaces with different finishes. Results show smoother surfaces perform better, while rough ones wear faster, although coatings can reduce ...
Adrián Claver +9 more
wiley +1 more source
Compact Antenna for Through-the-Earth Mine Communication
ElectricaThis research paper presents a planar Archimedean spiral antenna design for through-the-earth (TTE) mine communication. A study has been conducted to analyze the effect of factors such as depth, radial distance, loop antenna current, loop antenna radius,
Anjini Kumar Tiwary +2 more
doaj +1 more source
Acoustic excitation on flame properties caused by two sound sources
, 2020 Research and development in understanding the responses of acoustic excitation as a meant to influence flame behavior have become one of the significant issues in combustion instability.
Samsubaha, Muhammad Fauzi
core
Orbital angular momentum spectrum of antenna vortex beam based on loop integration
AIP Advances, 2021 Due to the divergence characteristics of vortex microwaves, it is difficult to determine orbital angular momentum (OAM) orders through far fields, while the spiral spectrum analysis method based on the area integral of antenna near fields is complicated.
Guang Yang +3 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.This review highlights advances in lightweight, lead‐free polymer nanocomposites for diagnostic X‐ray shielding. By linking filler chemistry, dispersion, architecture, and photon interaction mechanisms, it establishes structure–performance relationships guiding material design.
Aklilu G. Messele +2 more
wiley +1 more source
Design of Beam-Forming Networks for Fermat Spiral Antenna Arrays
TechnologiesThis paper presents a novel design technique using beam-forming networks based on CORPS (coherently radiating periodic structures) technology to achieve the simplification of the feed network of Fermat spiral antenna arrays.
Kleiverg Encino +4 more
doaj +1 more source
Single-Arm Archimedean Spiral Antenna with Broadband Circular Polarization
International Journal of Antennas and Propagation, 2021 In this paper, a single-arm Archimedean spiral (SAAS) antenna with broadband circular polarization is investigated. Unlike traditional single-arm Archimedean spiral antenna, the antenna arm consists of a hybrid meandered strip line and a smooth arc strip
Qingyuan Fang, Mengzhe Jin, Weidong Liu
doaj +1 more source
Generating Multiple OAM Based on a Nested Dual-Arm Spiral Antenna
IEEE Access, 2019 In this paper, a nested dual-arm spiral antenna (NDASA) is proposed to generate multiple orbital angular momentum (OAM) modes at the same operating frequency.
Yang Yang +4 more
semanticscholar +1 more source