Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Sun K. Hong"'
Autor:
Young Jin Song, Sun K. Hong
Publikováno v:
Journal of Electromagnetic Engineering and Science, Vol 24, Iss 3, Pp 226-233 (2024)
Ground-penetrating radars (GPR) based on a variety of techniques have been proposed to improve the performance of buried target (e.g., landmines, threat devices) detection. However, the small radar cross section (RCS) of small electronic devices pose
Externí odkaz:
https://doaj.org/article/f75a38b46c2b4a1a916a681577e19d6b
Publikováno v:
IEEE Access, Vol 12, Pp 86631-86638 (2024)
There has been growing interest in the field of wireless power transfer (WPT), especially for a high-power (Watt-level) application. Rectifiers are essential components for WPT, as they convert incoming RF into DC power. However, conventional Schottk
Externí odkaz:
https://doaj.org/article/06b823ba47ba48169ede1e094730a5bf
Autor:
Hong Soo Park, Sun K. Hong
Publikováno v:
IEEE Access, Vol 11, Pp 102917-102925 (2023)
We introduce an encryption device based on a compact wave-chaotic cavity to enhance the physical security of wireless communication. The proposed encryption device is composed of a compact quasi-2D disordered cavity, where transmit signals pass throu
Externí odkaz:
https://doaj.org/article/31015609b9794f9a80baa8a943446b28
Publikováno v:
Journal of Electromagnetic Engineering and Science, Vol 22, Iss 4, Pp 447-451 (2022)
The conventional radar technology is based on linear detection—i.e., the same transmit and receive frequencies are used. However, with linear radars, difficulties arise when detecting electronic objects with relatively small radar cross section (RC
Externí odkaz:
https://doaj.org/article/c53a8fff3d5d4d3f87e77220ebf2277d
Autor:
Kanghyeok Lee, Ha Young Hong, Wonwoo Lee, Semin Jo, Hong Soo Park, Junhyuk Yang, Changkun Park, Hojin Lee, Sun K. Hong
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-8 (2022)
Abstract A broadband metasurface flat lens is proposed as a polarization-independent wideband superstrate for wave focusing and gain enhancement at Ka-band. The proposed metasurface structure consists of four metal layers and is designed with diagona
Externí odkaz:
https://doaj.org/article/7311751556ba49bda6846358463dad21
Publikováno v:
Journal of Electromagnetic Engineering and Science, Vol 22, Iss 3, Pp 361-366 (2022)
This paper presents a novel wideband directive self-complementary bowtie antenna (SCBA) designed for Ka-band. The proposed antenna is well suited for wireless power transfer and energy harvesting of compact devices using 5G frequencies. The proposed
Externí odkaz:
https://doaj.org/article/78c45cb9f7da4cae93c15795074f3459
Publikováno v:
IEEE Access, Vol 10, Pp 40402-40409 (2022)
Realizing electromagnetic transparency in the visible light regime and beyond is an important challenge in both fundamental electromagnetics and angular-independent spectral filters for 6G communication and military applications. A conventional way o
Externí odkaz:
https://doaj.org/article/f0d78c3b3b624f8da32db68d14e057e5
Autor:
Hong Soo Park, Sun K. Hong
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
Abstract For far-field wireless power transfer (WPT) in a complex propagation environment, a time-reversal (TR) based WPT that can overcome the drawbacks of conventional beamforming (BF) by taking advantage of multipath has been recently proposed. Ho
Externí odkaz:
https://doaj.org/article/294f9408b60345a4997d2c2946f0f831
Autor:
Hayoung Hong, Hongsoo Park, Kanghyeok Lee, Wonwoo Lee, Semin Jo, Junhyuk Yang, Changkun Park, Hojin Lee, Sun K. Hong
Publikováno v:
Journal of Electromagnetic Engineering and Science, Vol 21, Iss 5, Pp 391-398 (2021)
A retrodirective beamforming system (BFS) based on a Rotman lens is proposed for far-field wireless power transfer at Ka-band. The true-time-delay property of the Rotman lens allows for a wideband operation covering 28–38 GHz. The designed BFS comp
Externí odkaz:
https://doaj.org/article/42d8accae8a9445bb211eefa2a2ae439
Publikováno v:
Applied Sciences, Vol 13, Iss 13, p 7729 (2023)
This paper proposes a compact K-band dual-circularly polarized antenna that can be implemented on a non-linear tag based on third-order intermodulation (IM3) for bio-sensing applications. The proposed antenna has the characteristics of being low-prof
Externí odkaz:
https://doaj.org/article/3c1e2dc926ca4a9186ddb0eb59055c16