Investigations of Miniaturized Meander Line Tag Antenna for UHF RFID System
نویسندگان
چکیده
Nowadays, the RFID systems have been used in many applications such as logistics, supply chain, access control, product management in warehouse and many others [1]. It can use for identification with the human, animal, product and others. Moreover, it can further use with the sensor applications to detect material or other system depending on the object of applications. This paper presents the investigation of the passive tag meander-line antenna by Tmatching technique for conjugate matching with the impedance of the NXP G2XL IC chip [2] of 21.29-j191.7 Ω at the frequency of 922.5 MHz. This impedance is determined at the center frequency [3]. The size of antenna is miniaturized by using the meander line structure for the maximum power transfer from the tag antenna to the IC chip. This antenna is used at the UHF frequency corresponding to the standard of UHF RFID in Thailand along the frequency of 920-925 MHz. The tag antenna design and analysis is included. The T-matching technique is used to improve the characteristic impedance of the antenna for matching with signal source (feed point). It has been extensively used in literature [4-5].
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