http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 주재율 (검색결과 29 건)
- 무료
- 기관 내 무료
- 유료
-
Design approach of label tags for item management Using UHF RFID
주재율 한국마린엔지니어링학회 2025 한국마린엔지니어링학회지 Vol.49 No.5
This study provides guidance for the design and analysis of a practical ultra-high-frequency (UHF) radio frequency identification (RFID) label tag antenna that achieves stable readability over a range of target objects. The study discusses the fundamental aspects of power transfer, antenna architecture, and microchip packaging in RFID systems, with a specific focus on the challenges of impedance matching caused by the varying dielectric properties of adjacent materials. To overcome these obstacles, a compact tag antenna structure that integrates a T-matching loop, meander-spiral dipole, and capacitive end load was examined. The designed tag antenna was optimized using electromagnetic simulations and fabricated on a flexible polyethylene terephthalate substrate by employing flip-chip bonding processes. Experimental results showed a maximum read range of 6.3 m at 917 MHz, with consistent performance even when the substrate dielectric constant increased to 5. The proposed antenna design offers a straightforward, low-cost, and robust solution for item-level RFID deployment, enabling dependable impedance matching and enhanced readability in practical applications.
-
-
-
-
-
-
주재율,추호성,박익모,오이석,Choo Jae-Yul,Choo Ho-Sung,Park Ik-Mo,Oh Yi-Sok 한국전자파학회 2006 한국전자파학회논문지 Vol.17 No.3
In this letter, we propose a novel printed helix antenna for RFID reader in UHF band. The printed strip line of the antenna is first wound up outside a polygonal shaped layer and then the winding continues on an inner layer to control the overall gain and the radiation pattern. In addition, the winding pitch angles on each layer have either negative or positive values resulting in the broad CP bandwidth. The detail structure of the antenna was optimized using Pareto genetic algorithm(GA), so as to obtain excellent performances for RFID reader antennas. The optimized two-layered polygonal helix was fabricated on the cardboard of a flexible substrate and the performances were measured and compared with the simulations. The fabricated antenna was made up of copper tape which can adhere to a flexible cardboard and had 21.4 % matching bandwidth, 31.9 % CP bandwidth, readable range of $5.5m^2$ with kr=3.2. Also based on the current distribution of the strip line of the antenna and sensitivity of the antenna bents points, we confirmed that the antenna has the quarter-wave transformer near the feed for the broad matching bandwidth and radiates the traveling wave for the broad CP bandwidth using the bent strip line.
-
UHF 대역 RFID 리더용 Crooked Wire 안테나 설계
주재율,추호성,박익모,오이석,Choo Jae-Yul,Choo Ho-Sung,Park Ik-Mo,Oh Yi-Sok 한국전자파학회 2005 한국전자파학회논문지 Vol.16 No.5
This paper reports the design of RFID reader antennas working in UHF band. The reader antennas were designed using a Pareto Genetic Algorithm(Pareto GA). Antennas were optimized to have circular polarization(CP) with less than 3 dB axial ratio, impedance matching with less than VSWR=2 within the frequency range of UHF, an adequate readable range, a restricted size(kr<2.22) considering the practical condition. After Pareto GA optimization, we selected and built the most suitable antenna design and compared the measured results to the simulations. Operating principle of the antenna was explained by investigating the amplitude and the phase of the induced current on the antenna body. We also researched the stability of the antenna with respect to the manufacturing error and studied the critical design parameters by applying the random error method on the antenna bent points.
-
-
DBpia
KCI연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
