Zobrazeno 1 - 10
of 303
pro vyhledávání: '"Jeong hae Lee"'
Autor:
Hae-Bin Jung, Jeong-Hae Lee
Publikováno v:
Journal of Electromagnetic Engineering and Science, Vol 24, Iss 1, Pp 51-56 (2024)
The PIN diode-based N-bit reconfigurable retrodirective metasurface (N-bit RRDM) is a next-generation retro-reflector that offers the advantages of effective electronical control of the retro-reflection angle, low loss, and thin planar structure. How
Externí odkaz:
https://doaj.org/article/ed4a5f7423be4f348705000ebe30bcd0
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:
Yongjune Kim, Pyoungwon Park, Jeongdai Jo, Joonsik Lee, Leekyo Jeong, Jonghwa Shin, Jeong-Hae Lee, Hak-Joo Lee
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
Abstract An ultrawideband electromagnetic metamaterial absorber is proposed that consists of double-layer metapatterns optimally designed by the genetic algorithm and printed using carbon paste. By setting the sheet resistance of the intermediate car
Externí odkaz:
https://doaj.org/article/79e4c3f2023f4708a20e3d4b7ce6c680
Publikováno v:
Journal of Electromagnetic Engineering and Science, Vol 21, Iss 2, Pp 161-164 (2021)
There have been considerable challenges with radar systems for detecting high-speed projectiles at a short range. This necessitates the presentation of a guideline for the minimum detection range that will guarantee detection of a target. In this let
Externí odkaz:
https://doaj.org/article/22a8508df01e4de6a650c7d7db0d357c
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
Autor:
Jae-Gon Lee, Jeong-Hae Lee
Publikováno v:
Journal of Electromagnetic Engineering and Science, Vol 19, Iss 4, Pp 279-281 (2019)
A one-dimensionally polarization-independent retrodirective metasurface (PIRMS) is proposed in this letter. The retrodirective metasurface (RMS) consists of ring structures on its ground plane to achieve the polarization-independent characteristics.
Externí odkaz:
https://doaj.org/article/96855602d2fc4c829142ddd3675c1bf8
Publikováno v:
Sensors, Vol 22, Iss 3, p 947 (2022)
The development of a wireless link for biomedical applications requires an accurate estimation of the delivered power to implanted devices. In particular, a variety of mid-range applications in the biomedical area have gained significant attention. A
Externí odkaz:
https://doaj.org/article/67fb11fcc40446e18f881121c3910092