Summary
International Symposium on Antennas and Propagation
2008
Session Number:2SS01A
Session:
Number:2SS01A-1
A UHF RFID Near-Field Reader Antenna for a Document Management System
Akiko Yamada, Shuichi Sekine, Hiroki Shoki, Shuichi Obayashi, Fusao Hor,
pp.-
Publication Date:2008/10/27
Online ISSN:2188-5079
Summary:
UHF-band Radio Frequency IDentification (RFID) is expected to be useful for various applications because of its long read range and ability to read multiple tags. On the other hand, these good characteristics will induce several problems such as tag collision, overreaching to tags in unexpected places, or interference with other readers. In recent years, therefore, near-field UHF RFID technology has attracted attention as a key technology for item-level tagging such as for pharmaceuticals and in retailing [1,2]. In the document management system shown in Figure 1, multiple tags should be read in the expected area, say, in a specific document box. Approximately 30 bundles of documents are put in the box, and thus the interval between tags in the individual bundles is very small, approximately two millimeters, in a typical case. The reader of the RFID system needs to read the 30 RFID tags in the document box during a single reading action. In this paper, we propose a near-field reader antenna whose radiation is very low so that it can operate even when other readers operate in the same room. Furthermore, the proposed antenna can read closely arranged tags. Simulation results and experimental results show the effectiveness of the proposed antenna.