Study of Antenna for VHF RFID Reader

• Main Authors: Kuo_yuan Chang, 張國媛
• Other Authors: Han_nien Lin
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/42950680873391394981

碩士 === 大葉大學 === 電信工程學系碩士在職專班 === 94 === Since the leader of retail business, Wal-mart, asks all their suppliers must be equipped with the ability for RFID(radio frequency identification) , the whole world is ready to enter the age of RFID. This thesis not only introduced the all system, but also indicated several antennas applied for RFID readers. Because the readers have to receive signals from everywhere, the performance of circular polarization is proper for them. Owing to its small size and easy reproduction, microstrip antennas are always designed for different purposes. This thesis made a circular-polarized microstrip antenna whose operation frequency is 915MHz based on FR4 printed circuit board. The inverted F antenna and the antenna based on styrofoam are simulated at the same time. Finally, the comparison between FR4 based antenna and microstrip antenna array available in markets will be presented. The FR4 based antenna performs well in circular polarization without heavy size and complicated structure.