Zobrazeno 1 - 10
of 74
pro vyhledávání: '"Kihun Chang"'
Publikováno v:
IEEE Transactions on Antennas and Propagation. 62:1799-1807
In this work, we designed, built, and tested a low-gain 20 dBi Luneburg Lens antenna using a rapid prototyping machine as a proof of concept demonstrator. The required continuously varying relative permittivity profile was implemented by changing the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d799c46a0545905f059aa06d99b91e9
https://doi.org/10.1109/tap.2013.2297165
https://doi.org/10.1109/tap.2013.2297165
Publikováno v:
The Journal of Korean Institute of Electromagnetic Engineering and Science. 21:459-467
A new type of circularly polarized(CP) antenna that is characterized by having both low-profile and greater axial-ratio bandwidth(ARBW) beyond existing antennas is introduced through analysis of artificial magnetic conductor(AMC) polarizer, and exper
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21b7861128bf14cad63e2f7846e23fe7
https://doi.org/10.5515/kjkiees.2010.21.5.459
https://doi.org/10.5515/kjkiees.2010.21.5.459
Publikováno v:
The Journal of Korean Institute of Electromagnetic Engineering and Science. 20:1233-1242
In this paper, a Base Station Antenna(BSA) utilizing Artificial Magnetic Conductor(AMC) as reflector instead of common conductive plate to improve radiation characteristics and achieve low-profile is proposed. In the case of the conventional BSA on c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6ff3c63674f03d133419e58177902a5
https://doi.org/10.5515/kjkiees.2009.20.12.1233
https://doi.org/10.5515/kjkiees.2009.20.12.1233
Publikováno v:
Microwave and Optical Technology Letters. 51:1039-1043
This article presents an integrated packaging antenna-diplexer module for wireless communication system in the cellular and satellite digital multimedia broadcasting (SDMB) band. Multilayer low temperature cofired ceramic (LTCC) technology with integ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a89b71ab2536930863b934ac2d1a31a
https://doi.org/10.1002/mop.24244
https://doi.org/10.1002/mop.24244
Publikováno v:
IEICE Transactions on Electronics. :1917-1922
In this paper, active frequency selective surfaces (FSS) having a squared aperture with a metal plate loading are described. Active FSS elements using switched PIN diodes are discussed with an equivalent circuit model. A unit cell consists of a squar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0d63336a22a040e65e19fe31332a49f8
https://doi.org/10.1093/ietele/e91-c.12.1917
https://doi.org/10.1093/ietele/e91-c.12.1917
Publikováno v:
Journal of the Korean Physical Society. 53:831-834
SAW (surface acoustic wave) tags are for passive RFID (radio frequency identi cation) systems. To overcome the drawbacks of current SAW RFIDs, which cannot be programmed after fabrication, we propose a technique to make the SAW ID tag programmable ev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f26ab0c029270b7344d4688c8cdd14f6
https://doi.org/10.3938/jkps.53.831
https://doi.org/10.3938/jkps.53.831
Publikováno v:
IET Microwaves, Antennas & Propagation. 2:512-517
A ultra-wideband (UWB) antenna with improved gain characteristics is proposed. With the improvements, it is discussed in terms of the band notch and enhanced radiation patterns. Shaping the return loss as an approach in order to achieve these charact
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a139a5d38f78557593e01987af3f98a3
https://doi.org/10.1049/iet-map:20070100
https://doi.org/10.1049/iet-map:20070100
Autor:
Young Joong Yoon, Kihun Chang
Publikováno v:
IEICE Transactions on Communications. :1697-1704
Recent advancements in the ubiquitous sensor network field have brought considerable feasibility to the realization of a ubiquitous society. A ubiquitous sensor network will enable the cooperative gathering of environmental information or the detecti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5f11f298083bfa8a8d920d2f3c105b5e
https://doi.org/10.1093/ietcom/e91-b.6.1697
https://doi.org/10.1093/ietcom/e91-b.6.1697
Publikováno v:
The Journal of Korean Institute of Electromagnetic Engineering and Science. 18:774-783
This paper presents an integrated packaging antenna-diplexer module for wireless communication systems in the Cellular and SDMB band. The design and the realization of the proposed one are experimentally analyzed and discussed. It consists of a dual-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::05d610ed4c6ccc604839a14dff2b1411
https://doi.org/10.5515/kjkiees.2007.18.7.774
https://doi.org/10.5515/kjkiees.2007.18.7.774
Publikováno v:
The Journal of Korean Institute of Electromagnetic Engineering and Science. 18:784-795
In this thesis, the Multi element antenna with wideband and enhanced gain characteristic is proposed to operate at both frequency range from 824 MHz to 896 11Hz for the CDMA and frequency range from 908.5 MHz to 914 MHz for the RFID band. The propose
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0660a74405d7af3c2adcc63ca48e889a
https://doi.org/10.5515/kjkiees.2007.18.7.784
https://doi.org/10.5515/kjkiees.2007.18.7.784