Zobrazeno 1 - 10
of 89
pro vyhledávání: '"Kwang-Chun Lee"'
Publikováno v:
ETRI Journal, Vol 41, Iss 6, Pp 715-730 (2019)
We propose a switched beam‐forming antenna that satisfies not only ultra‐wideband characteristics but also beam‐forming in the WLAN frequency band using an ultra‐wideband antenna and passive parasitic elements applying a broadband optimal rea
Externí odkaz:
https://doaj.org/article/2be8abbb6c9f4012a290d48329da6e30
Publikováno v:
ETRI Journal, Vol 41, Iss 4, Pp 536-548 (2019)
In this study, an electronically steerable parasitic array radiator (ESPAR) antenna via analog radio frequency (RF) switches for a single RF chain MIMO system is presented. The proposed antenna elements are spaced at λ/64, and the antenna size is mi
Externí odkaz:
https://doaj.org/article/91167af6fd704d4f9639c59286c32602
Autor:
Kwang-Seon Kim, Kwang-Chun Lee, Changwan Kim, Bonghyuk Park, Jae Ho Jung, Youngho Seo, Seunghyun Jang
Publikováno v:
IEEE Microwave and Wireless Components Letters. 30:697-700
This letter presents the implementation and measurement results of a partially digitized envelope-based carrier-bursting transmitter operating at 2.6 GHz. The transmitter consists of two chips, in this case: a partial-envelope delta–sigma modulator
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::891f89f85e260f0eae574fa6bda9555e
https://doi.org/10.1109/lmwc.2020.2998483
https://doi.org/10.1109/lmwc.2020.2998483
Autor:
Kwang-Chun Lee, Young Kyun Cho
Publikováno v:
IEEE Transactions on Power Electronics. 35:484-495
This paper presents a delta-sigma modulation (DSM) control scheme for noninverting buck–boost (NIBB) converter that features a duobinary encoding for four power switch controls. The proposed scheme converts the single-bit output of the modulator in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f97f3f1e74e995e0d12ba99bb6b68dc0
https://doi.org/10.1109/tpel.2019.2913404
https://doi.org/10.1109/tpel.2019.2913404
Publikováno v:
ETRI Journal, Vol 41, Iss 6, Pp 715-730 (2019)
We propose a switched beam‐forming antenna that satisfies not only ultra‐wideband characteristics but also beam‐forming in the WLAN frequency band using an ultra‐wideband antenna and passive parasitic elements applying a broadband optimal rea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::07c9f865668134e612d92f2da0e73b66
https://doaj.org/article/2be8abbb6c9f4012a290d48329da6e30
https://doaj.org/article/2be8abbb6c9f4012a290d48329da6e30
Publikováno v:
ETRI Journal, Vol 41, Iss 4, Pp 536-548 (2019)
In this study, an electronically steerable parasitic array radiator (ESPAR) antenna via analog radio frequency (RF) switches for a single RF chain MIMO system is presented. The proposed antenna elements are spaced at λ/64, and the antenna size is mi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a2e4ac4685b283808304cf063f59b82a
https://doi.org/10.4218/etrij.2018-0374
https://doi.org/10.4218/etrij.2018-0374
Autor:
Jeongsoo Park, Kwang-Chun Lee, Jeong-Geun Kim, Sunwoo Kong, Hui Dong Lee, Kwang-Seon Kim, Bonghyuk Park
Publikováno v:
Microwave and Optical Technology Letters. 61:1706-1711
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::18b8fb5cfc59160652e7c0af08960d7e
https://doi.org/10.1002/mop.31828
https://doi.org/10.1002/mop.31828
Publikováno v:
2019 49th European Microwave Conference (EuMC).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::22c14f54e3febe6f9aaa1e80f0f4f4bd
https://doi.org/10.23919/eumc.2019.8910937
https://doi.org/10.23919/eumc.2019.8910937
Publikováno v:
2019 49th European Microwave Conference (EuMC).
The effects of non-idealities including clock jitter, rise/fall-time mismatch of a pulse, and pulse-amplitude-level non-linearity on conventional delta-sigma-only and Manchester/delta-sigma-modulated microwave signals are studied. According to the ex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5cc0d0d7ffa5f5cacd435d3982baf8fd
https://doi.org/10.23919/eumc.2019.8910695
https://doi.org/10.23919/eumc.2019.8910695
Publikováno v:
2019 14th European Microwave Integrated Circuits Conference (EuMIC).
This paper presents a miniaturized 28-GHz FEM implemented in 0.15-µm InGaAs/GaAs E-mode pHEMT process. It is designed for use with 28-GHz switching beamforming systems. In order to miniaturize the system, the RF FEM is mounted on the printed circuit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5665386474b31a641889f424812d232
https://doi.org/10.23919/eumic.2019.8909537
https://doi.org/10.23919/eumic.2019.8909537