Earticle

초록

영어

In this paper, we discuss the recent trends on the passive UHF RFID tag chip design techniques and several important system parameters. We also summarize link budget studies on both conventional and modern UHF RFID communications. The paper highlights the reverse link limited case, which has known to be the minor concern if reader continuous wave (CW) can reach the tag in sufficient level. This makes sense when the tag sensitivity is rather high (over 10-12μW); however, since the tag chip fabrication technologies have been developed by time, the tag chip threshold levels are now less-dominant in determining link margin. If the tag
limitation can be alleviated, the forward link limited case can be resolved; thus, we rather focus on the path-loss problem. Since the path-losses are still exist in both forward and reverse links, and it can be doubled while CW travels the reader-tag-reader path because forward link and reverse link are on the same distance. Consider if reader receiver sensitivity is very high in the worst case. In this case, weaken tag response (i.e., backscatters) cannot reach the level that reader receiver can process tag data; bit-error rate can be higher. Overall, backscatter levels should be high enough so that reader receiver can correctly function. After discussing link budget,
we carried out practical measurements on fading effects between two circularly polarized UHF RFID antennas in a small scale area.

목차

Abstract
 I. 서론
 II. 링크 버짓
  A. 순방향 링크 버짓 (forward link budget)
  B. 역방향 링크 버짓
 III. 페이딩 측정 실험
 VI. 결론
 참고문헌

키워드

저자

• 정진우 [ Jin-Woo Jung | 국민대학교 UCRC Lab ]
• 박경태 [ Kyoung-Tae Park | 국민대학교 UCRC Lab ]
• 노형환 [ Hyoung-Hwan Roh | 국민대학교 UCRC Lab ]
• 박준석 [ Jun-Seok Park | 전자공학부, 국민대학교 ]
• 김형석 [ Hyeong-Seok Kim | 중앙대학교 전자전기공학부 교수 ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국정보통신설비학회 학술대회

• 간기

  반년간

• 수록기간

  2002~2025

• 십진분류

  KDC 567 DDC 621