Zobrazeno 1 - 10
of 221
pro vyhledávání: '"Yongshik Lee"'
Autor:
Minsu Choi, Shin-Jae You, Jinwoo Jung, Changseok Cho, Yongshik Lee, Cheonyoung Kim, Jungje Ha, Hyunsoo Lee, Youbin Seol
Publikováno v:
AIP Advances, Vol 14, Iss 6, Pp 065022-065022-7 (2024)
In Radar Cross Section (RCS) reduction as a military technology, dielectric barrier discharge (DBD) plasma is one of the most effective methods. For RCS reduction, it is reported that high plasma density over 1013/cm3 is required with high power and
Externí odkaz:
https://doaj.org/article/d3450b17e2b04cf0a66c96849ba8a7b1
Autor:
Kristian Chavdarov Dimitrov, Yongshik Lee, Jae-Ho Youn, Chan-Uk Park, Seung Won Oh, Myoung-Soo Lee
Publikováno v:
IEEE Access, Vol 12, Pp 117934-117943 (2024)
In this study, we propose a sensor for partial discharge (PD) sensing based on an electrically small hybrid spiral antenna, measuring approximately 0.087 wavelengths in diameter at 200 MHz. The sensor utilizes a hybrid design that integrates equiangu
Externí odkaz:
https://doaj.org/article/6d4015775a014201bb50310ece09d9ee
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-11 (2023)
Abstract This paper presents a multifunctional coil technique to enhance the transfer efficiency of an inductively-coupled wireless power transfer (WPT) system, regardless of the alignment condition and size ratio between the transmitter (Tx) and rec
Externí odkaz:
https://doaj.org/article/60dd66ebd7ed46d7a5b0f9982d0729d1
Autor:
Minsu Choi, Shin-Jae You, Jinwoo Jung, Changseok Cho, Yongshik Lee, Cheonyoung Kim, Jungje Ha, Hyunsoo Lee, Youbin Seol
Publikováno v:
Sensors, Vol 23, Iss 22, p 9170 (2023)
This paper deals with the practical application of Radar Cross Section (RCS) reduction technology using plasma. Although various plasma application technologies for RCS reduction have been studied, there are still many issues to be addressed for prac
Externí odkaz:
https://doaj.org/article/347ad17937274a91ba2e1862c3f5bf82
Publikováno v:
IEEE Access, Vol 10, Pp 96862-96872 (2022)
This study demonstrates tunable coil links for a wireless power transfer system with arbitrarily-located multiple receivers and arbitrary power division between them. Both the Tx and Rx coils are composed of a main coil and an array of assistant coil
Externí odkaz:
https://doaj.org/article/5e5f558c8b084910b372af065c0e1a73
Autor:
Jinwoo Jung, Changseok Cho, Minsu Choi, Shinjae You, Jungje Ha, Hyunsoo Lee, Cheonyoung Kim, Ilyoung Oh, Yongshik Lee
Publikováno v:
Sensors, Vol 23, Iss 16, p 7121 (2023)
In this study, the problems encountered in radar cross-section (RCS) measurement experiments utilizing a dielectric barrier discharge (DBD) plasma system are examined and an effective solution is proposed. A DBD plasma system generates heat due to th
Externí odkaz:
https://doaj.org/article/35553740c3d84752bdbbb446a73f3ef8
Publikováno v:
Sensors, Vol 22, Iss 15, p 5527 (2022)
Dual-band branch-line couplers with arbitrary power-split ratios are presented. The use of crossed lines at the center of the dual-band coupler enables it to independently provide different power-split ratios to the two bands. Additionally, open stub
Externí odkaz:
https://doaj.org/article/73a4471913e04a4ab55dee75332a9d3c
Publikováno v:
Journal of the Korean Institute of Electromagnetic Engineering and Science, Vol 18, Iss 1, Pp 63-69 (2018)
This work demonstrates attenuation effects of plasma on waves propagating in the 26.5–40 GHz range. The effect is investigated via experiments measuring the transmission between two Ka-band horn antennas set 30 cm apart. A dielectric-barrier-discha
Externí odkaz:
https://doaj.org/article/631c3a8b526045da878731d2ed729b8d
Autor:
Taejoo Oh, Changseok Cho, Wookhyun Ahn, Jong-Gwan Yook, Jangjae Lee, Shinjae You, Jinwoo Yim, Jungje Ha, Gihun Bae, Heung-Cheol You, Yongshik Lee
Publikováno v:
Sensors, Vol 21, Iss 24, p 8486 (2021)
In this study, a method was experimentally verified for further reducing the radar cross-section (RCS) of a two-dimensional planar target by using a dielectric rim in a dielectric barrier discharge (DBD) plasma generator using a frequency selective s
Externí odkaz:
https://doaj.org/article/cf629482ef5941078d50678437215bf6
Publikováno v:
Sensors, Vol 21, Iss 7, p 2295 (2021)
This study applies a multilayer coil technology that can compensate for a decrease in transfer efficiency due to a lateral misalignment in a practical 100 kHz-band wireless power transfer system and validates its effect on the efficiency of compensat
Externí odkaz:
https://doaj.org/article/31c3cef4957b4a9382a86f5d6af534bf