Zobrazeno 1 - 10
of 304
pro vyhledávání: '"Dong You Choi"'
Autor:
Ashfaq Ahmad, Dong-You Choi
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-13 (2024)
Abstract In this paper, a wideband polarization conversion metasurface is designed. Additionally, coding and chessboard metasurfaces are specifically tailored for radar cross-section reduction (RCS). Initially, a compact unit cell demonstrating excep
Externí odkaz:
https://doaj.org/article/b2c80cc1cb034a87b1aa76eeeb86e549
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-16 (2024)
Abstract This article introduces a miniaturized dual-band multiple input multiple output (MIMO) antenna with wide bandwidth and high isolation. The design incorporates ground plane modifications and utilizes metamaterials to achieve dual-band operati
Externí odkaz:
https://doaj.org/article/7f379f221eb24154a782ce55664d251b
Publikováno v:
Nanomaterials, Vol 14, Iss 18, p 1495 (2024)
In this study, a metasurface-based reflectarray is designed for X-band applications. The unit cells are equipped with an H-shaped slotted patch for additional resonance and phase range. Linear phase variation by altering the length of the patch is re
Externí odkaz:
https://doaj.org/article/bcde1a8805454ac3931ac074b8cd7033
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-14 (2023)
Abstract The spectral efficiency (SE) can approximately double when using full-duplex (FD) multiuser MIMO communications. However, there are difficulties because of multiuser interferences, self-interference (SI), and co-channel interference (CCI). T
Externí odkaz:
https://doaj.org/article/0952e6eaa27145319cf6bc40f7012c30
Publikováno v:
Symmetry, Vol 16, Iss 6, p 753 (2024)
Mid-field wireless power transfer (WPT) offers a compelling solution for delivering power to miniature implantable medical devices deep within the human body. Despite its potential, the current power delivery levels remain constrained, and the design
Externí odkaz:
https://doaj.org/article/20420e2368c84916aa2ae3ac9ef9ef1a
Publikováno v:
IEEE Access, Vol 11, Pp 34217-34226 (2023)
The path loss model for indoor emergency stairs has yet to get enough attention in the literature. Large-scale (LS) path loss models for a stairwell in a 10-stair academic building are the focus of this investigation. We measured the received power w
Externí odkaz:
https://doaj.org/article/b71cd7f1b36948cdbbe6392a7ab391f8
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-15 (2022)
Abstract This communication presents a polarization reconfigurable antenna array (PRAA) with Multi-input Multi-output (MIMO) formation for 5th generation (5G) millimeter wave (mm-Wave) communications. At first a single corner curtailed diagonal slott
Externí odkaz:
https://doaj.org/article/57c96d5525ca4609b6508c0697d6835d
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-8 (2022)
Abstract This study presents a simple, miniaturized, and low-profile multiple-input multiple-output (MIMO) antenna operating at 29 GHz with reduced mutual coupling between the antenna elements for futuristic 5G communication. The proposed design empl
Externí odkaz:
https://doaj.org/article/2ae72b61319142379e8626373b75ddab
Publikováno v:
PLoS ONE, Vol 18, Iss 3, p e0282781 (2023)
Research on path loss in indoor stairwells for 5G networks is currently insufficient. However, the study of path loss in indoor staircases is essential for managing network traffic quality under typical and emergency conditions and for localization p
Externí odkaz:
https://doaj.org/article/4ff964aac1b94411ba0774827e30ecfd
Publikováno v:
Applied Sciences, Vol 13, Iss 18, p 10389 (2023)
This paper presents the design and optimization of a dual-band polarization-dependent metasurface capable of dynamically switching transmission and reflection characteristics. The metasurface is composed of three metallic patterns, with the bottom la
Externí odkaz:
https://doaj.org/article/d7d93f2b993943a288ed8b813383bcfa