Zobrazeno 1 - 10
of 16 048
pro vyhledávání: '"directivity"'
Autor:
Said Mikki
Publikováno v:
Electromagnetic Science, Vol 2, Iss 3, Pp 1-19 (2024)
We explore the spatial directivity of radiating quantum source systems, which are defined as any generic source capable of producing photon emission and directing it to specific regions in space. We present a comprehensive definition of quantum direc
Externí odkaz:
https://doaj.org/article/dd0e65a5ed324d8387898476645860a2
Autor:
Mădălin Dombrovschi, Marius Deaconu, Laurentiu Cristea, Tiberius Florian Frigioescu, Grigore Cican, Gabriel-Petre Badea, Andrei-George Totu
Publikováno v:
Acoustics, Vol 6, Iss 3, Pp 698-712 (2024)
This paper aims to conduct an acoustic analysis through noise measurements of a hybrid propulsion system intended for implementation on a drone, from which the main noise sources can be identified for further research on noise reduction techniques. A
Externí odkaz:
https://doaj.org/article/013f3a44687e4c6a8880c0dd8fe15e1c
Autor:
Ajay Singh, Sunil Joshi
Publikováno v:
Journal of Engineering and Applied Science, Vol 71, Iss 1, Pp 1-17 (2024)
Abstract This paper presents the design and development of a rectangular slot DGS patch antenna fed by a microstrip line, designed to operate across three distinct frequency bands at 4.0 GHz, 4.9 GHz, and 5.5 GHz for 5G wireless communication applica
Externí odkaz:
https://doaj.org/article/bd97f75f37ea45d6af4e3d515d3d7ee0
Autor:
Ahmed E. Saleem, Jawad A. Hasan
Publikováno v:
Tikrit Journal of Engineering Sciences, Vol 31, Iss 3 (2024)
This work, presents a design of a nano-antenna based plasmonic materials at the frequency range from 192THz to 195THz for modern applications, including THz communication systems. The proposed antenna is constructed from the 3rd iteration of the Hilb
Externí odkaz:
https://doaj.org/article/6dcd5249d5ff4006999bf99e05908066
Publikováno v:
Ain Shams Engineering Journal, Vol 15, Iss 9, Pp 102923- (2024)
Microstrip patch antennas have gained popularity due to their compact size, flat design, cost-efficiency, and ability to accommodate various design needs. Despite their advantages, optimizing directional properties for peak performance remains challe
Externí odkaz:
https://doaj.org/article/428707db9c3c4a52801b1f93c713b65c
Autor:
Devendra Kumar, Dhirendra Mathur
Publikováno v:
Journal of Electromagnetic Engineering and Science, Vol 24, Iss 3, Pp 264-275 (2024)
This paper proposes a novel design for a frequency reconfigurable and bandwidth-enhanced antenna for use in biomedical telemetry applications. Data pertaining to a patient’s body parameters, such as blood pressure, pulse, and temperature, are gathe
Externí odkaz:
https://doaj.org/article/141943122f8a4484b98f8a215c96df7b
Publikováno v:
Journal of Engineering and Applied Science, Vol 71, Iss 1, Pp 1-19 (2024)
Abstract Near-field (NF) earthquakes have distinct ground motions, forward directivity pulses, and fling-step motions, causing structural responses to differ from far-field (FF) earthquakes. Seismic isolation is regarded as a developed and successful
Externí odkaz:
https://doaj.org/article/2e4076f243c4401997440eff5c8d10fb
Publikováno v:
Radioengineering, Vol 33, Iss 1, Pp 121-126 (2024)
In this paper, a novel high-directivity microstrip coupler based on reflective resistors is presented. The proposed coupler consists of three pairs of coupled-line sections and one pair of resistors. Generally, the coupling degree can be controlled b
Externí odkaz:
https://doaj.org/article/91b7d953695a400fa7961bc4ed34519c
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