Zobrazeno 1 - 10
of 10 106
pro vyhledávání: '"Loop antenna"'
Publikováno v:
ETRI Journal, Vol 46, Iss 4, Pp 727-736 (2024)
Telecommunications through an electrically conductive medium require the use of carrier bands with very-low and ultralow frequencies to establish radiofrequency links in harsh environments. Recent advances in atomic magnetometers operating at very-lo
Externí odkaz:
https://doaj.org/article/d1f37838cb1a49019ef701e1340c6c02
Akademický článek
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Autor:
Yi-Fang Lin, Chin-Cheng Chang, Chien-Hung Chen, Jia-You Xie, Yong-Xiang Zhuang, Hua-Ming Chen
Publikováno v:
IEEE Access, Vol 12, Pp 138280-138290 (2024)
This paper introduces a dual-polarized spline-loop antenna element and array. The antenna element consists of two pairs of cross spline-ring dipoles, each with four thin metal strips connected to the adjacent dipole arms, serving as antenna radiators
Externí odkaz:
https://doaj.org/article/0c44a7408a224c7ea63eb6d8633169d7
Publikováno v:
IEEE Access, Vol 12, Pp 115448-115464 (2024)
This paper proposes a wearable reconfigurable antenna which can be operated in sub-6GHz, V-band and D-band. In the sub-6GHz band, the dual loop antennas are combined with a diode switch to achieve multi-mode switching. In the V-band, a controllable b
Externí odkaz:
https://doaj.org/article/5c9c3e06166f438f943d959dd63bd518
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 5, Iss 1, Pp 180-189 (2024)
In this paper, a kind of half-loop Yagi-Uda antenna made of high-permittivity dielectric is proposed to realize end-fire radiation. As two typical materials with high permittivity, low-loss zirconia ceramic and liquid pure water are here employed for
Externí odkaz:
https://doaj.org/article/81e39c461c3b4c5f9ac57a68b1849a36
Publikováno v:
Sensors, Vol 24, Iss 20, p 6703 (2024)
Passive wireless surface acoustic wave (SAW) sensors are very useful for on-site monitoring of the working status of machines in complex environments, such as high-temperature rotating objects. For rotating parts, it is difficult to realize real-time
Externí odkaz:
https://doaj.org/article/37a128b4779746c8ac87047b97562b15
Publikováno v:
Energies, Vol 17, Iss 19, p 4951 (2024)
The frequency domain measurement of radiated emissions from electric railways (from 9 kHz up to 150 kHz) has been omitted from the main part of the relevant standard (lack of repeatability and reproducibility of the results is mentioned as the reason
Externí odkaz:
https://doaj.org/article/44671b85805b4967ad84a74d6d493c5c
Publikováno v:
Applied Sciences, Vol 14, Iss 16, p 6997 (2024)
Two concentric double-loop antennas were analyzed using the moment method to increase the 3 dB axial ratio bandwidth. Each antenna has a driven loop connected to a branched feedline that is vertical to the ground plane. First, a parasitic loop was ad
Externí odkaz:
https://doaj.org/article/700c0d63e33a423d985469d5a05eb43f
Autor:
Zhiqiang Li, Junyan Lin
Publikováno v:
Applied Sciences, Vol 14, Iss 14, p 6060 (2024)
In the environment of oil and gas wells, the shielding effect of metal casing increases the difficulty of applying wireless electromagnetic wave transmission technology in such wells. This paper constructs a theoretical model of downhole electromagne
Externí odkaz:
https://doaj.org/article/38d0cfbab62e44918b06cf7295f91251
Autor:
Dmitry P. Tabakov, Andrey G. Mayorov
Publikováno v:
Физика волновых процессов и радиотехнические системы, Vol 26, Iss 1, Pp 58-69 (2023)
The article is devoted to the analysis of electrodynamic properties elliptical frame structure. Taking into account double symmetry internal problem of electrodynamics for the structure under consideration in the framework of the thin-wire approximat
Externí odkaz:
https://doaj.org/article/eb5441fd2a834e9dba64f50d3a50c215