Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Sun-Gyu Lee"'
Publikováno v:
Sensors, Vol 24, Iss 13, p 4346 (2024)
In this paper, two orthogonally placed Vivaldi antennas with a septum-like polarizer to generate circular polarized (CP) waves are presented. Septum polarizers have garnered attention due to their simple structure and high quality of CP waves. While
Externí odkaz:
https://doaj.org/article/c15b9e96069c4c5d9d256791511b37d8
Autor:
Sun-Gyu Lee, Jeong-Hae Lee
Publikováno v:
IEEE Access, Vol 11, Pp 55657-55663 (2023)
This paper proposes a novel method for designing a dual-polarized reconfigurable reflectarray antenna (RRA) based on a symmetrically rotated sub-array operating in a single-band. To improve aperture efficiency and prevent grating lobes, a miniaturize
Externí odkaz:
https://doaj.org/article/0f6e39bf6889496b9ebfce97c44a7599
Publikováno v:
IEEE Access, Vol 11, Pp 6299-6304 (2023)
A hybrid reflectarray antenna (RA) composed of passive and active unit cells that can steer a beam into two selected directions with high aperture efficiencies is designed and experimentally verified. The hybrid RA is implemented by a combination of
Externí odkaz:
https://doaj.org/article/0df4358a4e20481e95bd9e9b0dbb2fc0
Publikováno v:
IEEE Access, Vol 10, Pp 103223-103229 (2022)
A wide-angle reconfigurable reflectarray antenna (RRA) utilizing a miniaturized ring patch that can be efficiently controllable with a single bit is designed and experimentally verified. Based on the adoption of miniaturized radiating element and the
Externí odkaz:
https://doaj.org/article/4b811c1f45d84153bbfd1a2db1b24686
Autor:
Sun-Gyu Lee, Jeong-Hae Lee
Publikováno v:
Journal of the Korean Institute of Electromagnetic Engineering and Science, Vol 18, Iss 3, Pp 175-181 (2018)
The array patterns of a patch array antenna were calculated using an active element pattern (AEP) method that considers ground edge effects. The classical equivalent radiation model of the patch antenna, which is characterized by two radiating slots,
Externí odkaz:
https://doaj.org/article/aaef4ef8f42946a28f9243dbfc7750f7
Publikováno v:
Sensors, Vol 21, Iss 4, p 1431 (2021)
The development of biomedical devices benefits patients by offering real-time healthcare. In particular, pacemakers have gained a great deal of attention because they offer opportunities for monitoring the patient’s vitals and biological statics in
Externí odkaz:
https://doaj.org/article/33a86df2a56f42e7a84bf04e1da3ae8e
Publikováno v:
Western Pacific Surveillance and Response, Vol 7, Iss 1, Pp 21-23 (2016)
The 2015 Middle East respiratory syndrome (MERS) outbreak in the Republic of Korea, which started with an imported case and spread throughout the country with a total of 186 cases, revealed the vulnerabilities of the health-care system of the country
Externí odkaz:
https://doaj.org/article/f13d78ac47504e2ba3ae57693f682feb
Miniaturized square fractal ring patch unit cell for active reflective metasurface in C‐ and X‐bands
Publikováno v:
Microwave and Optical Technology Letters. 64:2179-2188
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4458c6454970c6532370475ee5596eef
https://doi.org/10.1002/mop.33423
https://doi.org/10.1002/mop.33423
Publikováno v:
The Journal of Korean Institute of Electromagnetic Engineering and Science. 33:585-590
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8de67dd8b03d839d35db98c4796eef29
https://doi.org/10.5515/kjkiees.2022.33.8.585
https://doi.org/10.5515/kjkiees.2022.33.8.585
Publikováno v:
2022 International Symposium on Antennas and Propagation (ISAP).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dcc4a2bd8c4fccc448451bd8a18aa953
https://doi.org/10.1109/isap53582.2022.9998716
https://doi.org/10.1109/isap53582.2022.9998716