Summary
International Symposium on Antennas and Propagation
2010
Session Number:4FA1
Session:
Number:4FA1-5
Effect of Side Mirror as Reflector for vehicle RFID tag antenna
Dae-hwan Park, Kyeong-sik Min,
pp.-
Publication Date:2010/11/23
Online ISSN:2188-5079
Summary:
RFID system is the technology providing the capability of wireless recognition of unique ID of object from the wireless tag attached to the object through the back scattering of electromagnetic wave radiated from the reader [1]. The latest RFID technology is applied to a various fields amid the advancement of ubiquitous industry. Specifically, this technology for vehicle RFID system is often applied to save the money and to elevate the efficiency of management in apartment complex, industrial complex and toll gate in high way [2]. The automatic management of RFID system can reduce the time of gate passage more than the manual management by human. It means that this system gives the economic and convenient safety life. In order to provide service mentioned above, many researches of RFID system for automotive applications have been conducted [3] ~ [6]. As one example of application, the researches on RFID tag position which is to be attached to vehicle have been also considered and studied for the identification ratio improvement [6]. In addition, the electric properties of RFID tag antenna are affected depending on the object of vehicle such as conductor of car body, bumper composed of polyurethane and window glass, which makes the impedance change. This impedance effect appears the tag antenna performance presented the readable range and identification error ratio. Therefore, the tag antenna design needs to consider absolutely the surrounding environment where the tag antenna is installed, as well as the car object to be attached. The authors have been proposed the design for active and passive RFID tag antenna using vehicle side mirror. Because most of auto vehicles have two side mirrors, it can reduce the error of identification ratio comparison with one tag antenna system relatively. Another advantage to increase identification rate is an antenna design which are operated at active and passive tag band with dual resonance frequency bandwidth. Vehicle side mirror is composed of glass and the plated surface with silver. The plated mirror surface with silver operates as conductor. The electro-characteristics of RFID tag antenna placed in vehicle side mirror are changed by the plated mirror surface. This paper presents the effect of the plated side mirror with silver for vehicle RFID tag antenna.