Title :
Development of Optically Transparent Ultrathin Microwave Absorber for Ultrahigh-Frequency RF Identification System
Author :
Okano, Yoshinobu ; Ogino, Satoshi ; Ishikawa, Koji
Author_Institution :
Tokyo City Univ., Tokyo, Japan
Abstract :
The application of UHF radio-frequency identification (RFID) systems is rapidly increasing. However, the reliability of indoor telecommunication is adversely affected by multiple reflection interference. Consequently, to establish a highly reliable UHF-RFID system, it is essential to improve the multipath environment. This paper describes an ultrathin microwave absorber that is designed to improve the multipath environment of UHF-RFID systems. This absorber is optically transparent so that it does not create blind areas for surveillance cameras installed near an UHF-RFID system (e.g., at the entrance of an office or a warehouse). The improved tag identification probability using this absorber is demonstrated in an actual warehouse.
Keywords :
cameras; electromagnetic wave absorption; radiofrequency identification; surveillance; UHF radio-frequency identification systems; UHF-RFID system; indoor telecommunication reliability; multipath environment; multiple reflection interference; optically transparent ultrathin microwave absorber; surveillance cameras; tag identification probability; ultrahigh-frequency RF identification system; warehouse; Absorption; Antenna measurements; Dielectric substrates; Microwave theory and techniques; Radiofrequency identification; Time domain analysis; Vectors; Finite difference time domain (FDTD); UHF RF identification (UHF-RFID) system; tag identification probability; transparent; ultrathin microwave absorber;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2012.2202680
