あらまし 近年,RFID(Radio Frequency IDentification)システムは,個人認証や物流管理などに利用さ れるなど,普及が進んでいる.読取り対象となる RFIDタグには様々な形状のものが存在し,用途に適したもの が選択される.その一例として,リストバンド型のタグを用いた個人認証が挙げられる.しかしながら,リスト バンド型のように人体に装着して RFID タグを用いる場合には,人体の誘電性によりアンテナ特性が変化する. そこで本論文では,リストバンド型 RFID用アンテナの特性解析を数値解析及び生体等価ファントムを用いた実 験によって行い,人体がアンテナ諸特性に与える影響を評価した.更に,アンテナに反射素子を装荷することに よる利得改善の検討を行った.以上の結果より,人体がアンテナ諸特性に影響を与えることを確認し,また,反 射素子の装荷により放射特性の改善が可...

As a vital and integrated part of the radio-frequency identification (RFID) system, RFID antennas have been received much attention over years, and their design is very urgent and significant. In fact, the development of RFID antenna is of theoretical significance and practical value for the RFID system. In this chapter, the RFID technology is briefly introduced, and the operating principle of ...

─ In this paper we provide the basis of using radio frequency identification (RFID) tags for advertisement. Two RFID tags that apply to the 866 MHz and 915 MHz operating frequencies, respectively, were designed based on the logos of two universities participating in this project. Several fabrication methods were used to build the RFID tags on different substrates. The experimental results exhib...

Wireless sensors can be realized by integrating a sensor with a passive commercial radio-frequency identification (RFID) chip. When activated, the chip responds with a digitally encoded signal that not only identifies the sensor but also contains information about the sensor state. Two devices have been developed to date: a temperature-threshold indicator and a chloride-threshold indicator. Thi...

This paper aims to propose a solution to address the issue of authentication to prevent counterfeiting in a low cost RFID based system based on using Physically Uncloneable Functions.

This study aim is to provide a feasible and effective way for the government supervision, agricultural enterprises and consumers to obtain traceability information. This study researches traceability of agricultural products. Through the analysis of the participators, the influence of the agricultural products circulation pattern of supply chain, traceability security system and tracing process...

Moveable asset management is still not appropriately supported by existing IT systems. Items are not managed individually, information about location, status and usage is not accurate or lacking. This can cause delays in industrial operations, inefficient use or excess inventory of costly assets. We propose RFID technology as the key to link the necessary data directly with the physical assets....

Tag collision is one of the most important issues in RFID systems and many tag anti-collision protocols were proposed in literature. But some kind of these protocols like Tree-based protocols (specifically Query tree) which its performance depends on tag id length and construction, have some issues like id distribution. In this paper we discuss about Query tree protocol which may influenced by ...